Epson Stylus COLOR 740 Special Edition Service Manual
Epson Stylus COLOR 740 Special Edition Manual
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- Epson Stylus COLOR 740 Special Edition | Service Manual - Page 1
Color ink jet printer EPSON Stylus Color 440/640/740 ® 4009667 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 2
greatly appreciate being informed of them. The above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this manual or the consequences thereof. EPSON is a registered trademark of SEIKO EPSON CORPORATION. General Notice: Other product names used herein are for - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 3
MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN THEIR LINE OF WORK. 3. WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 4
manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of Stylus Color 440/640/ 740. The instructions TROUBLESHOOTING Provides the step-by-step procedures for troubleshooting. and adhesives required for servicing the product. APPENDIX - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 5
REVISION STATUS Rev. A B Date 1998/07/15 1998/09/30 Page(s) All Page 188 Pages 195 to 212 Contents First Release The exploded diagrams and part list for the Stylus Color 740 has been added. - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 6
Main (for Stylus Color 640 62 C257 Main, (for Stylus Color 740 64 Troubleshooting Troubleshooting 82 Unit Level Troubleshooting 85 Printer does not operate at power on 85 Error is detected 86 Failure occurs Printer 100 Tools 101 Specification for Screws 102 Service Checks After Repair 103 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 7
Adjustment Tools Required 131 Adjustment 132 Parallelism Adjustment 132 Adjustment by Adjustment Program 134 Maintenance Overview 154 Cleaning 154 Service Maintenance 154 Lubrication 155 Appendix Connector Summary 161 Connector Summary (Stylus Color 440/640 162 Connector Summary for Stylus - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 8
PRODUCT DESCRIPTION - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 9
EPSON Stylus Color 440/640/740 Revision A 1.1 FEATURES EPSON Stylus Color 440/640/740 are designed for PC users at home and low price for hat high performance. Also, Stylus Color 440 printer has the same high color print quality (720 X 720dpi) as Stylus ProXL, and Stylus Color 640,740 have the - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 10
EPSON Stylus Color 440/640/740 Table 1-1. Consumables Available for Stylus Color 440/640/740 Items Black Ink Cartridge Black Ink Cartridge CMY Ink Cartridge CMY Ink Cartridge EPSON 360 dpi Ink Jet Paper EPSON 360 dpi Ink Jet Paper EPSON 360 dpi Ink Jet Paper S020189 S020187 S020191 Codes - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 11
EPSON Stylus Color 440/640/740 1.2 Specifications This section describes each specification for Stylus Color 440, 640, and 740. 1.2.1 Printing Specification Print method On demand ink jet (MACH type. One unit combined with black and CMY head) Nozzle configuration Black 64 nozzles, CMY 21 nozzles - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 12
EPSON Stylus Color 440/640/740 Revision A 2.2578 mm 10.16 mm Y1 M 1 Y2 M 2 Y3 M 3 Y4 M 4 #1 90DPI #3 #5 #2 180DPI #4 #6 7.9022 mm 2.2578 mm C1 #23 C2 #25 #24 C3 #27 #26 C4 #29 Y19 M 19 Y20 M 20 Y21 M 21 (Y) (M) C19 C20 C21 (C) #59 #60 #61 #62 #63 #64 (B2) (B1) - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 13
EPSON Stylus Color 440/640/740 32/360" 32/360" 32/360" 112/360" 112/360" #1 #1 #2 #2 #3 #3 #4 #4 #5 #5 #6 #6 #7 #7 #8 #8 #9 #9 #10 #10 #11 #11 #1 #1 #2 #4 #3 #7 #4 #10 #5 #13 #6 #16 #7 #19 #8 #22 #9 #25 #10 #28 #11 #31 #2 #3 #5 #6 #8 #9 #11 #12 #14 #15 #17 #18 #20 #21 #23 #23 #26 #26 #29 #29 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 14
EPSON Stylus Color 440/640/740 Revision A Paper holding capacity of Hopper Size: Index card ∼Legal Thickness: Less than 8mm Paper capacity: 100 Cut sheets 10 Envelopes 65 Coated papers (360 dpi) 65 Coated papers (720 dpi) 20 Glossy papers, Photo Paper 10 Transparent sheets 30 Index cards 1 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 15
EPSON Stylus Color 440/640/740 Revision A 1.2.2 Paper Specification This section describes the printable area and types of paper that can be used in this printer. 1.2.2.1 Cut Sheet [Size] A4: [Width 210mm (8.3") x Length 297mm (11.7")] Letter: [Width 216mm (8.5") x Length 279mm (11.0")] B5: - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 16
EPSON Stylus Color 440/640/740 1.2.2.4 Index Card [Size] A6 Index card: A5 Index card: 5x8" Index card: 10x8" Index card: Width 105mm (4.1") x Length 148mm (5.8") Width 148mm (5.8") x Length 210mm (8.3") Width 127mm (5.0" x Length 203mm (8.0") Width 127mm (5.0") x Length 203mm (8.0") [Thickness] - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 17
EPSON Stylus Color 440/640/740 1.2.3 Printing Area [Cut Sheet] LM See Figure 1-4 in the right column and the tables in the following page for the printable areas for Raster Graphics mode and Character mode. NOTE: Character mode is only suitable for Stylus Color 740. Revision A PW RM TM - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 18
EPSON Stylus Color 440/640/740 Revision A Paper Size A4 Table 1-4. Raster Graphics Mode (for 3 models) PW PL LM RM TM 210 mm (8.3") 297 mm (11.7") 3 mm (0.12") 3 mm (0.12") 3 mm (0.12") Letter 216 mm (8.5") 279 mm (11.0") 3 mm (0.12") 9 mm (0.35") 3 mm (0.12") B5 182 mm (7.2") 257 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 19
EPSON Stylus Color 440/640/740 [Envelope] Table 1-6 and Figure 1-5 show the printable area for envelopes. Paper Size #10 DL C6 Table 1-6. Envelopes Margin LM RM TM 28 mm (1.10") 3 mm (0.12") 3 mm (0.12") 7 mm (0.28") 3 mm (0.12") 3 mm (0.12") 3 mm (0.12") 3 mm (0.12") 3 mm (0.12") BM/min. - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 20
EPSON Stylus Color 440/640/740 1.2.4 Ink Cartridge Specifications [Black Ink Cartridge] Table 1-8. Black Cartridge Specifications Items Specifications Type Exclusive Cartridge for Stylus Color 440, 640 Exclusive Cartridge only for Stylus Color 740 Color Black Print Capacity - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 21
EPSON Stylus Color 440/640/740 [Color Ink Cartridge] Items Type Color Print Capacity Validity Environmental conditions Weight Table 1-9. Color I/C Specifications Specifications Exclusive Cartridge for Stylus Color 440, 640, 740 CMY 300 pages / A4 (360 dpi, 5% duty each colors) 2 years (sealed in - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 22
EPSON Stylus Color 440/640/740 1.2.5 Environmental Condition Temperature Operating :10 to 35 °C (Refer to Figure 1-8 for condition) Non-operating:-20 to 60 °C (with shipment container) NOTE: 1 month at 40 °C and 120 hours at 60 °C Humidity Operating: 20% ~ 80% RH (without condensation Refer - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 23
EPSON Stylus Color 440/640/740 1.2.6 Electric Specification [120V version] [Rated voltage] AC120V [Input voltage range] AC99∼132V [Rated frequency range] 50∼60Hz [Input frequency range] 49.5∼60.5Hz [Rated current 0.4A (Max. 0.5A) [Power consumption] Approx.15W (ISO/IEC 10561 Letter pattern - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 24
EPSON Stylus Color 440/640/740 1.2.9 Acoustic Noise Stylus Color 440: Approximately 45 dB Stylus Color 640,740: Approximately 47 dB 1.2.10 CE Marking [220∼240 V version] Low Voltage Directive 73/23/EEC:EN60950 EMC Directive 89/336/EEC :EN55022 Class B :EN61000-3-2 :EN61000-3-3 :EN50082-1 : - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 25
EPSON Stylus Color 440/640/740 Revision A 1.3 Interface This printer provides parallel interface as standard. 1.3.1 Parallel Interface (Forward Channel) [Transmission mode] 8 bit parallel, IEEE-1284 compatibility mode [Synchronization] By /STOPBE pulse [Handshaking] BY BUSY and /ACKLG signal - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 26
EPSON Stylus Color 440/640/740 Table 1-10. Parallel I/F Forward Channel Pin No. Signal Name Return GND Pin In/Out Functional Description 1 /STROBE 19 The strobe pulse. Read-in of data is I performed at the falling edge of this pulse. 2-9 DATA0-7 20-27 The DATA0 through DATA7 signals - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 27
EPSON Stylus Color 440/640/740 Revision A 1.3.2 Parallel Interface (Reverse Channel) [Transmission mode] IEEE-1284 nibble mode [Synchronization] Refer to the IEEE-1284 specification [Handshaking] Refer to the IEEE-1284 specification [Data trans. timing] Refer to the IEEE-1284 specification - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 28
EPSON Stylus Color 440/640/740 Revision A Table 1-12. Parallel I/F Reverse Channel Pin No. Signal Name Return GND Pin In/Out Functional Description 1 HostClk 19 I Host clock signal. 2-9 Data0-7 20-27 The DATA0 through DATA7 signals represent data bits 0 to7, respectively. Each - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 29
EPSON Stylus Color 440/640/740 The following are the points to note when using the parallel Interface. NOTE 1:"Return GND pin" in the table means twist pair return and is used for all control signals except for Logic H,+5V, Chassis, GND and NC. In this twist pair return, returning side is connected - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 30
, the printer is in the busy state continuously when the input buffer is full. 1.3.2.2 Auto Interface Selection (for Stylus Color 640, 740) Manual Selection: One of two interfaces can be selected by the default setting mode. Automatic Selection: The automatic interface selection is enabled by the - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 31
EPSON Stylus Color 440/640/740 1.3.3 Serial Interface (for Stylus Color 640, 740) [Standard] Based on RS-423 [Synchronization] Synchronous [Bit Rate] Approx.1800Kbps [Handshaking] X-ON/X-OFF, DTR Protocol [Word Format] Data Bit= 8 bits Parity Bit= None Start Bit= 1 bit Stop Bit= 1 bit - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 32
EPSON Stylus Color 440/640/740 1.4 Control Panel Since Stylus Color 440, 640, 740 does not require many buttons since printer driver can start various settings and motions. Therefore, there are only 2 non-lock type push switches, 1 lock type push switch and 4 LEDs. Figure 1-11 shows control panel of - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 33
EPSON Stylus Color 440/640/740 Revision A 1.4.2 Panel Functions Refer to Table 1-19 to Table 1-21. Switch Load/Eject (within 2 sec.) Load/Eject (for 2 sec.) Cleaning (for 2 sec.) Cleaning (within 2 sec.) Table 1-19. Panel Functions Function 1. Loads or ejects a paper. 2. When the carriage is on - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 34
EPSON Stylus Color 440/640/740 1.4.3 Printer Condition and Panel Status Table 1-22 shows printer condition and panel status. Since the table shows various error status and also indicates printer status, it enables you to find appropriate repair ways. Printer Status Power on condition Ink Sequence - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 35
once taken out should never be used again. Re-installation of the cartridge not filled fully upsets the ink level detection and may cause a serious problem in the print head as a result. Never use the ink cartridge that has been removed. The following explains the warning sign above. [Step 1] After - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 36
absorber in the printer enclosure is needed to be replaced with new one by a service person. The ink quantity that is absorbed by the absorber (waste ink pad) is belt tension malfunction, shortage of lubricant on the carriage guide shaft, etc. 2) CG Access Error: Short circuit, etc. - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 37
EPSON Stylus Color 440/640/740 1.6 Printer Initialization Stylus Color 440, 640, 740 have three kinds of initialization methods. Following explains each initialization. [1.Power-on initialization] This printer is initialized when turning the printer power on, or printer recognized the cold-reset - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 38
EPSON Stylus Color 440/640/740 Revision A 1.8 Main Components Stylus Color 440, 640, 740 have following major units. Also, it is one of the major characteristics that the bottom of the Printer mechanism serves as the Lower case at the same time. Each unit from 2) to 5) are simply explained below: - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 39
EPSON Stylus Color 440/640/740 Revision A 1.8.2 C206 Main-B Board (Stylus Color 440) C206 Main-B board controls Stylus Color 440 and consists of following major electric elements. This board will be changed to new board called C255 Main board. 1.8.3 C256 Main Board (Stylus Color 640) C256 Main - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 40
EPSON Stylus Color 440/640/740 1.8.4 C257 Main Board (Stylus Color 740) C257 Main board controls Stylus Color 640 and consists of following major electric elements. Revision A 1.8.5 Power Supply Board C206 PSB/PSE (Stylus Color 440, 640) C257 PSB/PSE (Stylus Color 740) In the electric boards for - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 41
EPSON Stylus Color 440/640/740 1.8.6 C206 PNL Board (Stylus Color 440, 640) Panel board (C206 PNL board) is located in the panel case where is in the right bottom of the front printer and consists of 3 switches, 4 LEDs and 1 connector. Revision A 1.8.7 C209 PNL Board (Stylus Color 740) Panel board - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 42
OPERATING PRINCIPLES - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 43
EPSON Stylus Color 440/640/740 2.1 Overview This section describes the operating principles of the printer mechanism and the electric circuit board. Electronic Boards for Stylus Color 440 are; Main: C206 Main-B, C255 Main Board Power Supply: C206 PSB,PSE Board Panel: C206 PNL Board - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 44
EPSON Stylus Color 440/640/740 2.1.1 Printer Mechanism Like previous EPSON Ink Jet printers such as Stylus Color 400, 600, Photo, Photo 700, Photo EX, the printer mechanism of Stylus Color 440/640/740 does not have an exclusive mechanism to change over paper feeding and pumping operation. In stead, - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 45
is called Nozzle Plate. Filter When the ink cartridge is installed, if any dirt or dust around the cartridge needles are absorbed into the head inside, there is a great possibility of causing nozzle clog and disturbance of ink flow and finally causing alignment failure and dot-missing. In order to - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 46
EPSON Stylus Color 440/640/740 2.1.1.2 Printing Process Following figures show the sectional drawings of normal state and ejecting state of the printhead. 1. Normal State: When the print signal is not output, PTZ also does not move in the waiting state (normal state). (Refer to Figure 2-3.) 2. - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 47
EPSON Stylus Color 440/640/740 2.1.1.3 Carriage Mechanism Carriage mechanism is to drive the carriage with print head mounted from left to right or vice versa. The carriage drive motor in these printers are a 4-phase, 200-pole, stepping motor and is driven by 1-2 phase, 2-2 phase and W1-2 phase - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 48
space between platen surface and print head by rotating the shafts of the carriage guide shaft which itself is decentralized, with the operation of PG lever. This is paper is loaded to the printer inside by Load/Eject button, the printer does not perform carriage lock operation. Chapter - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 49
problems guide shaft on the printer mechanism during the production process or repair service . In the adjustment, the space between parallel adjustment lever and gage should be 1.04 mm. 2.1.1.4 Paper Feed Mechanism and Pump Mechanism Mechanisms that send the paper in the hopper to inside - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 50
EPSON Stylus Color 440/640/740 Revision A Papers on the ASF (auto-sheet-feeder) supplied by the user are carried to the printer inside by paper pick up sequence. Unlike the previous models, ASF of Stylus Color 440/640/740 has mufti feed prevention mechanism. Following explains this function - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 51
Transmission Gear [Previous] Print Head Eject Notched Roller Paper Support Roller ASF Roller Transmission Gear Platen Roller Drive Gear PF are sent to the printer inside. The papers picked up by paper roller in the ASF goes to between platen and roller support. Also, the eject roller pushes - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 52
EPSON Stylus Color 440/640/740 2.1.1.5 Ink System Ink system mechanism consists of 1)cap mechanism, 2)pump mechanism, carriage lock mechanism, 4)waste ink absorber and 5)ink sequence. Out of these mechanism, from 1) to 4) are physical mechanism and parts which are mounted on the printer mechanism - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 53
to change over the pump/paper feed mechanism. Therefore, whenever the paper feed/pump motor rotate, pump drive roller in the pump unit inside rotates. However, ink absorption/non ink absorption are separated by the roller rotational direction. Also, even if the pump driver rotates toward ink - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 54
EPSON Stylus Color 440/640/740 The table below shows PF/Pump motor rotational direction and pump system operation. Table 2-7. Relationship between Pump Motor Rotation and it's Work PF/Pump motor rotational direction Pump unit operation Clockwise (CW) forward rotation 1)Release from the Pump - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 55
EPSON Stylus Color 440/640/740 2.1.1.6.1 Cap Mechanism In the cap mechanism, in order to prevent ink from being thickened on the head surface, it is controlled that the head surface stays adherent to the rubber frame of the cap surface when the power is off. The absorber is spread in the cap and can - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 56
EPSON Stylus Color 440/640/740 2.2 Electrical Circuit Operating Principles Stylus Color 440/640/740 contains the following three electric circuit boards. Electronic Boards for Stylus Color 440 are; Main: C206 Main-B, C255 Main Board Power Supply: C206 PSB,PSE Board Panel: C206 PNL Board - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 57
EPSON Stylus Color 440/640/740 Revision A 2.2.1 C206 PSB/PSE and C257 PSB/PSE Power Supply Board (for Stylus Color 440, 640, 740) There are 2 types of power supply boards for Stylus Color 440/640/740. The main components of the boards are the same, but the +5V regulator ICs which create steady + - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 58
EPSON Stylus Color 440/640/740 Revision A 1) Regardless of the state of power switch (On or OFF), the voltage is always applied in the primary side of the power supply board from the moment or at the state that AC-plug is plugged in. At this time, F1 plays a role of preventing AC100V from coming - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 59
EPSON Stylus Color 440/640/740 When the power is turned on, Q1 repeats ON/OFF automatically along with the increase and decrease of energy on the trans coil at the primary side. While the power is being on, PSC signal is input to the power supply board from the C206 Main-B/C255/ C256/C257 Main board - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 60
EPSON Stylus Color 440/640/740 2.2.2 C206 Main-B, C255 Main (for Stylus Color 440) Various DC voltage generated on the C206 PSB/PSE board is added various signals in order to drive the printer function on the C206 main-B, C255 main, board the drive of CR/PF (Pump) motor and printing head is - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 61
EPSON Stylus Color 440/640/740 Revision A [CPU] The 16-bit CPU which is mounted on Stylus Color 440 is running at 25Mhz. Gate array manages most of controls and monitors. Likewise the Stylus Color, the D-RAM is applied for RAM which is used as work area for receiving data and developing the data - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 62
EPSON Stylus Color 440/640/740 2.2.3 C256 Main (for Stylus Color 640) Various DC voltage generated on the C206 PSB/PSE board is added various signals in order to drive the printer function on the C256 main board, and the drive of CR/PF (Pump) motor and printing head is performed. Following figure - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 63
EPSON Stylus Color 440/640/740 Revision A [CPU] The 16-bit CPU which is mounted on Stylus Color 640 is running at 25Mhz. Gate array manages most of controls and monitors. Likewise the Stylus Color, the D-RAM is applied for RAM which is used as work area for receiving data and developing the data - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 64
EPSON Stylus Color 440/640/740 2.2.4 C257 Main, (for Stylus Color 740) Various DC voltage generated on the C257 PSB/PSE board is added various signals in order to drive the printer function on the C257 main board the drive of CR/PF (Pump) motor and printing head is performed. Following figure shows - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 65
EPSON Stylus Color 440/640/740 Revision A [CPU] The 16-bit CPU which is mounted on Stylus Color 740 is running at 24Mhz. Gate array manages most of controls and monitors. Likewise the Stylus Color, the D-RAM is applied for RAM which is used as work area for receiving data and developing the data - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 66
EPSON Stylus Color 440/640/740 2.2.4.1 Reset Circuits [C206 Main-B, C255 Main for Stylus Color 440] The reset circuit prevents the CPU from running away, which is caused by the unstable voltage in the logic line during the power ON/OFF operation. And reset IC(IC9) monitors level of power voltage at - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 67
EPSON Stylus Color 440/640/740 [C256 Main for Stylus Color 640] The reset circuit prevents the CPU from running away, which is caused by the unstable voltage in the logic line during the power ON/OFF operation. And reset IC(IC9) monitors level of power voltage at the over loading or malfunction on - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 68
EPSON Stylus Color 440/640/740 Revision A [C257 Main for Stylus Color 640] The reset circuit prevents the CPU from running away, which is caused by the unstable voltage in the logic line during the power ON/OFF operation. And reset IC(IC8) monitors level of power voltage at the over loading or - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 69
EPSON Stylus Color 440/640/740 The following three figures show the sensor circuits. Out of the data such as EPW with IEEE 1284 Nibble mode to be returned to the host, the data to indicate ink consumption is calculated and managed by the counter of the firmware. Therefore, it is omitted here. +5V - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 70
EPSON Stylus Color 440/640/740 2.2.4.3 EEPROM Control Circuits The EEPROM of Stylus Color 440/640/740 has following contents. Gate array controls operations of reading data when the power is on and writing data when the power is off. Ink consumption (Bk, CMY) CL counter (Various cleaning operations - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 71
EPSON Stylus Color 440/640/740 2.2.4.4 Timer Circuit A lithium battery is mounted on the main board and calculates how long the printer is not used. The timer IC starts counting with oscillation motivated by the crystal oscillator using this battery as a power source. The following figures show - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 72
EPSON Stylus Color 440/640/740 Revision A 2.2.4.5 DRAM Control In the Dynamic RAM control, output and formation of CAS and RAS control signals become necessary in addition to the output of CS signal. The CPU not only controls that but also perform the output of CS signal of P-ROM. Refresh timing - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 73
EPSON Stylus Color 440/640/740 +42 F1 H8D2813(IC6) CHG KC1 ND1 ND2 XOVM CTB 2 4 COM DTB 6 MD1 MD2 Data +5 CLK /STB /CLR VRF 20 Vcc GND 1 VK GND 25 E05B44(IC2) 199 SW7 200 VHCTL 198 CHG SW8 KC1 LP 90 ND1 99 ND2 MD1 BIEN BHSO 100 MD2 97 YCMIEN Data 96 CLK YCMHSO /STB - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 74
EPSON Stylus Color 440/640/740 +42 F1 H8D2813(IC7) CHG KC1 XOVM CTB 2 4 ND1 ND2 COM DTB 6 MD1 MD2 Data +5 CLK /STB 20 Vcc /CLR VRF GND 1 VK GND 25 E05B43(IC2) 199 VVHHCCTLTL CHG KC1 SW7 201 SW8 199 ND1 ND2 MD1 LP 92 96 HSOIEN MD2 Data CLK HSO1 97 99 HSO2 /STB /CLR VRF VK - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 75
EPSON Stylus Color 440/640/740 CXA20996(IC14) 22 A0 A1 A2 VCC45 Vcc45_2 23 NPNB 20 FB 18 A3 PNPB CLK1 16 CLK2 /FLOOR 24 VCC5 +5 /RST DATA DCLK /E VOUTGND 14 E05B588(IC2) VHCTL 190 SWC0 HWA0 HWA1 HWA2 189 SWC1 HLAT 184 HWA3 HWCLK1 HWCLK2 HNCHG HCLK 173 174 /HWFLR IECLK 175 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 76
to change over the reference voltage as drive current settings by making few combinations using current setting ports(input). However, firmware does not support Micro-step in the Stylus Color 440/640/740. The figures below show connection diagram of PF (Pump) motor drive circuit. Revision A E05B44 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 77
EPSON Stylus Color 440/640/740 8 PFIA0 PFIA1 9 PFIA2 10 11 PFPHAA 4 PFIB0 PFIB1 5 PFIB2 6 +5 PFPHAB 7 E05B588(IC2) A3956(IC13) 14 D0 9 D1 8 D2 7 PHASE 10 OUTA OUTB 15 VBB VCC 2 REF 1 PFD C90A05 (IC1) 6- 7 112 DA1 5+ Current Detection M6252(IC16) A3956(IC13) 14 D0 9 D1 8 D2 7 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 78
EPSON Stylus Color 440/640/740 2.2.4.8 CR Motor Drive Circuit IC14(LB1845) on C206 Main-B, C255 Main board, IC14(UDN2917) on C256 Main board, and IC11(LB1847) on C257 Main board are used for driving CR motor. In the IC, Bi-pola drive PWM current control type is performed, making it possible to - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 79
EPSON Stylus Color 440/640/740 Revision A E05B43 (IC2) 75 CRA0 76 CRA1 CRA0 75 73 CRB1 CRAPH 77 74 CRBPH 60 MTBV0 MTBV1 61 MTBV2 62 63 MTBV3 MTBV4 64 MTAV0 65 UDN2917 (IC15) 2 I10 6 Out1A 1 I11 3 Out1B 23 I20 24 I21 Out2A 18 Out2B 21 43 PH1 26 PH2 44 Vref1 25 Vref2 +5 CN5 A 1 /A 3 B 2 /B - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 80
EPSON Stylus Color 440/640/740 E05B588(IC2) CRIA0 193 CRIA1 194 CRIA2 195 CRIA3 196 CRIB0 200 CRIB1 199 CRIB2 198 CRIB3 197 CRPHAA 191 CRPHAB 202 192 CRENBA 201 CRENBB C90A05 (IC1) 2- 1 111 DA0 3+ Current Detection M6252(IC15) LB1847(IC11) 25 IA1 24 IA2 23 IA3 22 IA4 18 IB1 19 IB2 20 IB3 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 81
TROUBLESHOOTING - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 82
for the same problem, which makes troubleshooting more difficult. This section, however, provides simple and effective ways to facilitate troubleshooting. The following flowchart illustrates the main steps of the trouble shooting process. START Unit Level Troubleshooting Table 3-1. Motor Resistance - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 83
Black cartridge out Black cartridge installed Color cartridge out Color cartridge installed Change the VH voltage of charge pulse for common driver circuit Revision A Chapter 3 Troubleshooting 83 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 84
ink drain tank and reset the EEPROM. Turn the printer off and on again. If the printer does not recover, repair the appropriate part. Chapter 3 Troubleshooting 84 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 85
EPSON Stylus Color 440/640/740 Revision A 3.2 Unit Level Troubleshooting When a problem occurs, you can identify the defective unit according to the symptoms exhibits. The table below lists the symptoms of certain problems. Once the problem is identified, refer to the flowchart that corresponds to - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 86
the counter. (Refer to 1.4.2) Yes Is the problem solved? Check the ink cartridge sensor and replace the head if it's ubnormal. NO Refer to Section 3.4 "Repair of the printer mechanism". END END Flowchart 2 Chapter 3 Troubleshooting 3.2.3 Failure occurs during printing Revision A START - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 87
running? NO YES Check the PF motor. If there is no problem, replace the main board. Is the problem solved? NO YES Refer to Section 3.4 "Repair of the printer mechanism". END END Flowchart 4 Chapter 3 Troubleshooting Revision A 3.2.5 Control panel operation is abnormal. START Is the control - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 88
follows: Stylus Color 440: C206 PSB/PSE Stylus Color 640: C206 PSB/PSE Stylus Color 740: C257 PSB/PSE This section describes the problems related to the power supply board. The table below provides various symptoms, likely causes, and checkpoints. The checkpoints refer to waveforms, resistance, and - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 89
, Check collector side. Q3) are dead. Replace Q2 or Q3. +42 V line is abnormal. Check the following parts. • ZD87, ZD83 • ZD51, ZD81-ZD86 • PC1 Chapter 3 Troubleshooting Replace suitable parts. 89 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 90
. • FA3635P is used for Stylus Color 740. Stylus Color 740: • Check the switching (Pin 8) waveform of IC51. (Pin 8) Revision A Solution Replace IC51. Replace IC51. Chapter 3 Troubleshooting 90 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 91
printer is as follows: Stylus Color 440: C206MAIN-B, C255MAIN Stylus Color 640: C256MAIN Stylus Color 740: C257MAIN This section describes the problems related to the main controller board. The table below provides various symptoms, likely causes, and checkpoints. The check points refer to waveforms - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 92
IC6, the IC5 or IC6 is dead. Stylus Color 440: Replace IC1, IC3, or IC4. Stylus Color 640: Replace IC1, IC3, IC5, or IC6 Chapter 3 Troubleshooting 92 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 93
640: Check the waveform at 43, 26 pin of IC14. Stylus Color 740: Check the waveform at 27, 16 pin of IC11. Replace IC2. Chapter 3 Troubleshooting 93 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 94
440: Replace IC6, Q7, or Q9. Stylus Color 640: Replace IC7, Q7, or Q9. Stylus Color 740: Replace IC14, Q2, or Q3. Replace IC2. Chapter 3 Troubleshooting 94 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 95
at 10, 15 pin of IC12 and IC13. Revision A Solution Replace IC2 Stylus Color 440, 640: Replace IC15 Stylus Color 740: Replace IC12, IC13. Chapter 3 Troubleshooting 95 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 96
instruction for repairing the printer mechanism. It describes various problems disconnected inside. I/C is defective. Head unit is defective. Check Point Manually drive the carriage moves smoothly when moved manually. Check tension of the timing and lubricate the carriage guide axis. Adjust tension - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 97
the cleaning operation several times and check printing. The head FFC is disconnected inside. The head FFC is out of connection. The head unit is detective. Connect the FFC properly. Replace the head if there is no connection problem with the FFC. Refer to Chapter4. Refer to Chapter4. Refer to - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 98
if the PF motor cable is connected. Replace ASF sensor. Replace PE sensor. Connect the head FFC. Replace the CR motor if there is no problem in the cable connection. Replace the PF motor if there is no problem in the cable connection. Chapter 3 Troubleshooting 98 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 99
DISASSEMBLY AND ASSEMBLY - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 100
the main board of this printer. Be sure to observe the following instructions when serving the battery: Keep the battery away from any metal or (An explosion may be generated inside the battery, and cause burning or explosion.) Do not dismantle the battery. (The gas inside the battery may hurt your - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 101
les piles déchargées selon les lois et les règles de sécurité en vigueur. Never remove the ink cartridge from the carriage unless this manual specifies to do so. When transporting the printer after installing the ink cartridge, be sure to pack the printer for transportation without removing the ink - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 102
the specified types of screws are used at proper locations, referring to the table below. Note that the screw numbers described in the manual correspond to the numbers in the table. Table 4-2. Screw Characteristic No. Body Name Size 1 +Bind, S-tight M3X6 2 +Bind, S-tight M3X10 3 +Bind - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 103
list below, which enables you to keep record of servicing and shipping more efficiently. Category Printer units Adjustment Lubricant necessary Checked / Not necessary Any dirt or obstacles around the shaft of carriage guide? Checked / Not necessary Is the CR motor at the correct temperature (not - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 104
EPSON Stylus Color 440/640/740 4.2 Disassembly Procedures The flowchart below shows procedures for disassembly. Remove the Housing Refer to 3.2.1 Remove the Board Assembly 3.2.2 Remove the operation panel 3.2.3 Remove the Printer Mechanism 3.2.4 Revision A Remove the Print Unit 3.2.4.1 Remove - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 105
EPSON Stylus Color 440/640/740 4.2.1 Removing the Housing Since the printer mechanism itself structures the bottom part, the printer mechanism appears just by removing the housing. 1. Open the printer cover and turn the PG adjustment lever towards (+) side. 2. Remove 4 screws (No.2) securing the - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 106
EPSON Stylus Color 440/640/740 4.2.2 Removing the Board Assembly Since the main board and power supply circuit board are built in a separate bracket from the printer mechanism, remove the whole bracket from the printer mechanism. NOTE: The main board and power supply board equipped with each printer - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 107
EPSON Stylus Color 440/640/740 (No.1) Revision A (No.1) Main Board [Cable Holder A and B] A B (No.1) (No.1) M/B Shield Plate (No.1) Figure 4-3. Removing the M/B Shield Plate Power Supply Board M/B Shield plate (No.6) Figure 4-4. Removing the Boards Chapter 4 Disassembly and Assembly - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 108
EPSON Stylus Color 440/640/740 4.2.3 Removing the Operation Panel The panel board equipped with each printer is as follows: - Stylus Color 440/640: C206PNL - Stylus Color 740: C209PNL 1. Remove the housing. (Refer to Section 4.2.1.) 2. Remove two screws (No.1) securing the operation panel and - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 109
EPSON Stylus Color 440/640/740 4.2.4 Disassembling the Printer Mechanism Since Stylus Color 440/640/740 do not have the lower housing, the printer mechanism part should already appear by now. Therefore, this section explains procedures for disassembling the major parts or units of the printer - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 110
EPSON Stylus Color 440/640/740 Revision A Figure 4-6. Removing the Print Head Chapter 4 Disassembly and Assembly 110 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 111
EPSON Stylus Color 440/640/740 Make sure that this protrusion is in the U ditch of the priht head side. This part should be touching the CR shaft receiver. Revision A Make sure that the protrusion of the carriage is aligned with the hole of the earth board. Carriage Assembly Print Head Nozzle - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 112
EPSON Stylus Color 440/640/740 4.2.4.2 Removing the Absorber Tray Assembly ;A 1. Remove the housing. (Refer to Section 4.2.1.) 2. Remove the operation panel. (Refer to Section 4.2.3.) 3. Remove one screw (No.4) securing "Absorber tray assembly" located on the right side of the printer mechanism. 4. - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 113
EPSON Stylus Color 440/640/740 4.2.4.3 Removing the Pump Assembly and Cap Assembly 1. Remove the housing. (Refer to Section 4.2.1.) 2. Remove the operation panel. (Refer toSection 4.2.3.) 3. Remove the absorber tray assembly ;A. (Refer to Section 4.2.4.2.) 4. Loosen two screws located on the edge of - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 114
EPSON Stylus Color 440/640/740 Loosen screws on the right and left sides and float the Paper eject frame assembly. Revision A Pump Assembly Release three hooks from the interior of the right frame assembly. Cap Assembly (No.5) Release a hook from the back of the printer mechanism and remove - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 115
EPSON Stylus Color 440/640/740 Head Cleaner Order of assembling the pump parts. Figure 4-10. Component of Pump Assembly Chapter 4 Disassembly and Assembly Revision A 115 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 116
EPSON Stylus Color 440/640/740 4.2.4.4 Removing the CR Motor Assembly 1. Remove the housing. (Refer to Section 4.2.1) 2. Rotate the gear 67.2 toward you and release the carriage lock mechanism, then move the carriage to the center. 3. Loosen the timing belt by pushing the driven pulley holder and - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 117
EPSON Stylus Color 440/640/740 4.2.4.5 Removing the PF Motor Assembly [For Stylus Color 740] 1. Remove the housing.(Refer to Section 4.2.1.) 2. Remove the absorber tray assembly ;A. (Refer to Section 4.2.4.2.) 3. Remove the following gears located on the left side of the printer mechanism. Gear 67.2 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 118
EPSON Stylus Color 440/640/740 [For Stylus Color 440, 640] 1. Remove the housing. (Refer to Section 4.2.1.) 2. Remove the absorber tray assembly ;A. (Refer to Section 4.2.4.2.) 3. Remove the 2 screws securing the PF motor assembly. to the frame. When disassembling the PF motor assembly, pull the - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 119
EPSON Stylus Color 440/640/740 4.2.4.6 Removing the ASF Assembly 1. Remove the housing. (Refer to Section 4.2.1.) 2. Release the fixed hook from the inside of the printer mechanism and remove the gear 34 from the roller shaft in the ASF assembly. 3. Remove the cables from the cable hook on - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 120
EPSON Stylus Color 440/640/740 4.2.4.6.1 Removing the Paper Feed Roller Assembly 1. Remove the ASF assembly. (Refer to Section 4.2.4.6.) 2. Remove the brake lever, releasing one leg of the torsion spring 41.2 from the hook of the ASF frame. 3. Remove the fixing shaft bushing from the right side of - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 121
EPSON Stylus Color 440/640/740 Revision A Figure 4-16. Disassembly of ASF Assembly Chapter 4 Disassembly and Assembly 121 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 122
EPSON Stylus Color 440/640/740 4.2.4.6.2 Removing the Right and Left LD Roller Assembly 1. Disassemble the ASF assembly and remove the paper feed roller assembly and hopper assembly from the ASF assembly. (Refer to Section 4.2.4.6.) 2. Take out the right and left compression springs 1.66 from the - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 123
the fixed hook of the PG lever and remove the lever. 6. Release the fixed hook of the PG lever support and remove the PG lever support and washer from the edge of the CR guide shaft. (Refer to the figure next page.) 7. Remove one screw(No.7) and rotate the right parallelism adjustment bushing - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 124
EPSON Stylus Color 440/640/740 Revision A Figure 4-19. Removing the Carriage Assembly Chapter 4 Disassembly and Assembly 124 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 125
PE detector lever, pay attention not to damage the lever. Be careful not to damage the hook during disassembly and assembly of the front paper guide ;B. Be careful not to scratch the PF roller assembly during disassembly and assembly, since its surface is specially coated to improve paper feeding - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 126
EPSON Stylus Color 440/640/740 Revision A Figure 4-21. Removing the Paper Eject Roller Assembly Figure 4-22. Removing the PF Roller Assembly Chapter 4 Disassembly and Assembly 126 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 127
assembly and PE lever, if necessary. During assembly, make sure that the tip (sensor part) of the detector lever is in the hole of paper guide assembly. Revision A Chapter 4 Disassembly and Assembly Figure 4-23. Removing the PE Detector Assembly 127 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 128
EPSON Stylus Color 440/640/740 4.2.4.10 Removing the HP Detector 1. Remove the housing. (Refer to Section 4.2.1.) 2. Remove the cable from the HP detector and take it out after releasing the fixed hook. Figure 4-24. Removing the HP Detector Chapter 4 Disassembly and Assembly Revision A 128 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 129
ADJUSTMENT - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 130
throughout this chapter. Table 5-1 Adjustment Required No. Adjustment Item Conditions 1 Parallelism Adjustment • When you replace or remove the Carriage guide shaft. • When you move the parallelism adjustment bushing. 2 Initial Ink Charge • When you replace or remove the printhead. 3 Head - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 131
EPSON Stylus Color 440/640/740 5.1.2 Adjustment Tools Required Table 5-3 below shows adjustment tools for Stylus Color 440/640/740. Table 5-3 Adjustment Tools Required No. Name Adjustment Item Contents/Spec. 1 Thickness Gauge Parallelism Adjustment 1.04 mm 2 Adjustment Program Each - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 132
to the center and set the thickness gauge on the fixed position of front paper guide ;B as you can see in the figure 4-1 on the next page 4. Move Put the thickness gauge on the flat side of the rib of the front paper guide ;B. When you move the carriage, move it, pulling the timing belt with - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 133
the printhead and cleaner head is more than 0.5 mm. 3. Then, rotate the gear 67.2 and return the head cleaner to the front position. Left "PAPER GUIDE, FRONT;B" Right (HP side) Rib: Avoid 2ribs from left Carriage [Thickness Gauge] Rib: Avoid 1 rib at right end Assembly *Put the gauge on a flat - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 134
EPSON Stylus Color 440/640/740 Revision A 5.2.2 Adjustment by Adjustment Program In this printer, it is necessary to set the correct information for each printer mechanism in order to maintain consistent printing function and quality, eliminating difference of each printer mechanism's - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 135
EPSON Stylus Color 440/640/740 Main menu ESC Key Return Key Adjustment Maintenance Market/Destination Check Head Cleaning(CL2) A4 Check Pattern Head Voltage ID Input Ink Charge Flag Reset Head Angular Adjustment Transportation Liquid Charge Bi-D Adjustment Protection Counter value - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 136
Stylus Color 740] If your printer is Stylus Color 740, you must set the correct CG, NLSP or Standard. Therefore, be sure to read the instructions in the following step carefully to take the proper steps. If no model name is registered, go to Section 5.2.2.2.1 / Step 1. Chapter 5 Adjustment 136 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 137
EPSON Stylus Color 440/640/740 5. After a few seconds, the model name appears on the screen shown below. Proceed to one of the following steps. 6. The main menu shown below appears. If the printer is Stylus Color 440 or 640, go to Step 6. If the printer is Stylus Color 740, go to Section - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 138
Stylus Color 740: If the printer is Stylus Color 740, you must set the correct CG, NLSP or Standard. Therefore, be sure to read the instructions below carefully to take the proper steps. After a few seconds, the model name appears on the Initial Screen (2) (Figure 5-7). Proceed to one of the - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 139
enter the main menu. Figure 5-11. Destination Setting Screen for Stylus Color 740 Do not select the NLSP if your Stylus Color 740 does not support the NLSP characters. You can distinguish the NLSP model from Standard model by referring to the following point on the C257 Main board; Standard: There - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 140
EPSON Stylus Color 440/640/740 5.2.2.3 Initial Ink Charge Operation There is no ink charged in the ink path of a spare printhead and printer mechanism. Therefore, after you replaced any of the following units, perform initial ink charge and return the printer after making sure that ink is ejected - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 141
equipped with the strongest cleaning sequence CL2 contained in this adjustment program. With this sequence, you can forcibly solve the clogged nozzle problem caused by viscous ink. If you can not recover the clogged nozzles despite you performed CL2 operation, enter the Initial ink charge - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 142
EPSON Stylus Color 440/640/740 Revision A 5.2.2.5 Protection Counter Indicate/Reset The program provided with this manual can let you confirm or clear the current protection counter value. (Of course, you can confirm or clear the current protection value by main unit - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 143
EPSON Stylus Color 440/640/740 [Clearing the current protection counter value] 1. Enter the main menu. (Refer to Section 5.2.2.2 ) 2. Apply the maintenance menu. 3. By using the Up/Down arrow key, select the item Indication of the counter value for the waste ink pad in the maintenance menu (Figure - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 144
the suitable destination depending on the type of the main board supported. Without this operation (Market/destination setting), users can not , if you set the destination to "Standard" despite your Stylus Color 740 supports NLSP characters, they will not be used. Even though your spare C257 Main - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 145
EPSON Stylus Color 440/640/740 4. Press the Enter key, and the screen below appears. The terms World and Standard show the current value set in the destination and CG addresses in the EEPROM. Figure 5-21. Market/Destination Confirmation Menu 5. You can return to the adjustment menu by pressing the - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 146
EPSON Stylus Color 440/640/740 Revision A 5.2.2.7 Head Voltage ID Input Head voltage value adjustment function enables you to write printhead ID. This operation is considered the most important to maintain proper ink discharging system. If an ID is not written correctly, it results in white or - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 147
EPSON Stylus Color 440/640/740 6. When you input the head ID value, the screen automatically advances consequently, as shown below: Revision A 7. Press the Esc key once. The screen returns to the Head Voltage ID Check/Input Select Menu. (See Figure 5-22.) 8. By using the Up/Down arrow key, select - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 148
differences are not adjusted, they can adversely influence the printhead angle, and color overlapping is not performed correctly and color/white line problem occurs as a result. Therefore, in order to adjust the printhead angle correctly, the exclusive lever for adjusting the printhead angle is - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 149
EPSON Stylus Color 440/640/740 Head Angular Adjustment Pattern (BK-M) Figure 5-28. Sample of Head Angular Adjustment Pattern 5. Loosen the printhead securing screw securing the printhead on the carriage. (You don't need to remove it completely.) Revision A 6. Look at the black/magenta combination - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 150
EPSON Stylus Color 440/640/740 7. After changing the position of the adjust lever, select Head angular adjustment pattern again. The printer prints out a head angular adjustment pattern and the screen automatically returns to the Current Head Angular Confirmation Menu (1) shown in the figure below. - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 151
EPSON Stylus Color 440/640/740 Revision A 5.2.2.9 Bi-D Adjustment You perform this adjustment to correct differences in printing positions, which is caused by slippage of printing timing in right and left directions during the Bi-directional printing. Therefore, you are required to perform this - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 152
EPSON Stylus Color 440/640/740 200 CPS Bi-D Pattern : Data = -2 Left Gap 200 CPS Bi-D Pattern : Data = 0 Right Gap 200 CPS Bi-D Pattern : Data = 2 Figure 5-34. Bi-D ADjustment Pattern Sample Revision A 6. By using the Up/Down key, select Adjust on the Bi-D adjustment menu (Figure 5-32). Then the - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 153
MAINTENANCE - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 154
housing is stained with ink, use a cloth moistened with neutral detergent to wipe it off. Inside the printer: Use a vacuum cleaner to remove any paper dust. Revision A 6.1.2 Service Maintenance If print irregularity (missing dot, white line, etc.) has occurred or the printer indicates "MAINTENANCE - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 155
the printer mechanism during servicing. Never use oil and the grease other than those specified in this manual. Use of different types ) G-26 Lubricate the contact points between the hooks on "PAPER GUIDE, FRONT" and each roller. Avoid applying grease around the paper path. Use a - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 156
to the cutout.) Completely wipe off any grease sticking out to the inner side of ASF. G-26 Evenly apply inside the hole 12 Oil pad in the carriage assembly O-12 0.7 cc Note: This is the amount to - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 157
EPSON Stylus Color 440/640/740 Never apply oil to the CR guide shaft directly. This may cause fatal damage to the components of the printer. Avoid applying oil excessively to the oil pad. This may cause fatal damage to the components of the printer. Revision A Chapter 6 Maintenance 157 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 158
EPSON Stylus Color 440/640/740 Revision A Chapter 6 Maintenance 158 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 159
EPSON Stylus Color 440/640/740 Revision A Chapter 6 Maintenance 159 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 160
APPENDIX - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 161
EPSON Stylus Color 440/640/740 A.1 Connector Summary This section gives information on connectors and their pin assignment. Since all connectors and their pin assignments except for CN8 (printhead) are common for Stylus Color 440 and Stylus Color 640, they are included in one section (Section - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 162
EPSON Stylus Color 440/640/740 A.1.1 Connector Summary (Stylus Color 440/640) This section provides information on connectors in the main units of the Stylus Color 440 and Stylus Color 640. Figure 1 shows how the main component units are connected. Information contained in this section only applies - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 163
EPSON Stylus Color 440/640/740 A.1.1.1 Connector Pin Assignment (Stylus Color 440 and Stylus Color 640) Tables in this section provide connector pin assignments of the C206MAIN-B, C255MAIN and C256MAIN, the main boards equipped with Stylus Color 440 and Stylus Color 640. Information contained in - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 164
EPSON Stylus Color 440/640/740 Table A-5. Connector CN6 Pin Signal Name I/O Function 1 CRA Out Phase drive signal (A) 2 CRB Out Phase drive signal (B) 3 CR-A Out Phase drive signal (-A) 4 CR-B Out Phase drive signal (-B) Table A-6. Connector CN7 Pin Signal Name I/O Function 1 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 165
EPSON Stylus Color 440/640/740 Table A-8. Connector CN8 (C256MAIN) Pin Signal Name I/O Function 1 BCO In Black ink cartridge detect signal 2 CCO In Color ink cartridge detect signal 3 THM In Thermistor detect signal 4 GND --- Ground 5 LAT Out Head data latch pulse output 6 GND - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 166
EPSON Stylus Color 440/640/740 A.1.2 Connector Summary for Stylus Color 740 This section contains information on connectors in the main units of Stylus Color 740. Figure 2 shows how the main component units of the Stylus Color 740 are connected. Information contained in this section only applies to - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 167
EPSON Stylus Color 440/640/740 A.1.2.1 Connector Pin Assignment (Stylus Color 740) Tables in this section provide connector pin assignments of the C257MAIN, the main board equipped with Stylus Color 740. Information contained in this section only applies to Stylus Color 740. If you need information - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 168
EPSON Stylus Color 440/640/740 Table A-17. Connector CN9 Pin Signal Name I/O Function 1 BCO In Black ink cartridge detect signal 2 CCO In Color ink cartridge detect signal 3 THM In Thermistor detect signal 4 GND --- Ground 5 LAT Out Head data latch pulse output 6 GND --- - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 169
EPSON Stylus Color 440/640/740 Revision A A.2 EEPROM Address Map This section contains EEPROM map for Stylus Color 440/640 and Stylus Color 740. As it is in Section A.2, this section is separated in 2 parts as shown below. Therefore, be sure to refer to the correct section depending on the printer - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 170
EPSON Stylus Color 440/640/740 Table A-20. Stylus Color 440/640 EEPROM Address Map Address Explanation Setting 00H Password 0 01H 02H Market 0: Word 1: Japan 2: Custom (MJ-)∗∗ 3: Custom (Stylus Color) ∗∗ 4: Custom (other name) ∗∗ 03H 1st dot adjustment -40≤ n ≤40 (by 1/1440 inch) 04H - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 171
EPSON Stylus Color 440/640/740 Table A-22. Stylus Color 440/640 EEPROM Address Map (Continued) Address Explanation Setting 20H Password 2 21H 22H Interface selection 0: Auto, 1: Parallel 2: Serial 23H Interface wait time 0 to 255 (by second) 24H Parallel I/F speed 0: High speed 1: - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 172
EPSON Stylus Color 440/640/740 Table A-24. Stylus Color 440/640 EEPROM Address Map (Continued) Address Explanation Setting QPIT Factory Settings Settings 3EH CR-phase of Home 00H 00H 3FH ERROR Number 00H 00H 40H Password 4 5AH - 41H 0FH - 42H Ink flags bit7: Reserved bit6: - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 173
EPSON Stylus Color 440/640/740 Table A-26. Stylus Color 440/640 EEPROM Address Map (Continued) Address Explanation Setting 66H 67H 68H 69H 6AH 6BH 6CH 6DH 6EH 6FH 70H 71H 72H to 79H, 7AH to 7FH Ink counter A power off time CL time accumulated printing time Stylus Color 440 Dot size for - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 174
EPSON Stylus Color 440/640/740 A.2.2 EEPROM Address Map (Stylus Color 740) This section provides EEPROM address map for the Stylus Color 740. EEPROM map in this section only applies to Stylus Color 740. If you need EEPROM map for Stylus Color 440/640, return to Section A.2.1. (They are combined in - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 175
EPSON Stylus Color 440/640/740 Revision A Table A-30. Stylus Color 740 EEPROM Address Map (Coutinued) Address Explanation Setting QPIT Factory Settings Settings 14H Head actuator rank ID for lwEF 00H (*1) 15H Bi-D Adjustment -36 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 176
EPSON Stylus Color 440/640/740 Table A-32. Stylus Color 740 EEPROM Address Map (Coutinued) Address Explanation Setting QPIT Factory Settings Settings 33H CG table 0: Italic U.S.A., 1: Italic France, 08H 08H 2: Italic Germany 3: Italic U.K, 4: Italic Denmark, 5: Italic Sweden, 6: Italic - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 177
EPSON Stylus Color 440/640/740 Revision A Table A-34. Stylus Color 740 EEPROM Address Map (Coutinued) Address Explanation Setting QPIT Factory Settings Settings 4CH Ink counter Cm 00H 00H 4DH 00H 00H 4EH 00H 00H 4FH 00H 00H 50H Ink counter Cc 00H 00H 51H 00H 00H 52H 00H 00H - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 178
EPSON Stylus Color 440/640/740 A.3 Circuit Board Component Layouts This section is composed of the following components layouts. C206MAIN-B (Stylus Color 440) C256MAIN (Stylus Color 640) C257MAIN (Stylus Color 740) C206PSB/PSE (Stylus Color 440/640) C257PSB/PSE (Stylus Color 740) C206PNL (Stylus - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 179
EPSON Stylus Color 440/640/740 Revision A Figure A-3. C206MAIN-B Board Component Layout (1/2) (Stylus Color 440) Chapter 7 Appendix 179 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 180
EPSON Stylus Color 440/640/740 . Revision A Figure A-4. C206MAIN-B Board Component Layout (2/2) (Stylus Color 440) Chapter 7 Appendix 180 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 181
EPSON Stylus Color 440/640/740 Revision A Figure A-5. C256MAIN Board Component Layout (1/2) (Stylus Color 640) Chapter 7 Appendix 181 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 182
EPSON Stylus Color 440/640/740 Revision A Figure A-6. C256MAIN Board Component Layout (2/2) (Stylus Color 640) Chapter 7 Appendix 182 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 183
EPSON Stylus Color 440/640/740 Revision A Figure A-7. C257MAIN Board Component Layout (1/2) (Stylus Color 740) Chapter 7 Appendix 183 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 184
EPSON Stylus Color 440/640/740 Revision A Figure A-8. C257MAIN Board Component Layout (2/2) (Stylus Color 740) Chapter 7 Appendix 184 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 185
EPSON Stylus Color 440/640/740 Revision A Figure A-9. C206PSB Board Component Layout (Stylus Color 440/640) Figure A-10. C206PSE Board Component Layout (Stylus Color 440/640) Chapter 7 Appendix 185 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 186
EPSON Stylus Color 440/640/740 Revision A Figure A-11. C257 PSB Board Component Layout (Stylus Color 740) Chapter 7 Appendix Figure A-12. C257 PSE Board Component Layout (Stylus Color 740) 186 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 187
EPSON Stylus Color 440/640/740 Revision A Figure A-13. C206PNL Component Layout Figure A-14. C209PNL Component Layout Chapter 7 Appendix 187 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 188
EPSON Stylus Color 440/640/740 A.4 Exploded Diagrams This section contains the following exploded diagrams. Exploded diagram for Stylus Color 440 (1/3, 2/3, 3/3) Exploded diagram for Stylus Color 640 (1/3, 2/3, 3/3) Exploded diagram for Stylus Color 740 (1/3, 2/3, 3/3) Revision B Chapter 7 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 189
EPSON Stylus Color 440/640/740 500 751 752 752 126 102 Revision A 115 106 122 122 126 125 105 450 125 180 101 107 753 104 119 400 for ETT 181 for LATIN 124 124 182 for LATIN 124 400 for EAI 103 410 for RUSSIA 124 123 for EUR,S.E.ASIA,OCEANIA,EKL,RUSSIA 400 401 100 EXPLODED - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 190
EPSON Stylus Color 440/640/740 Revision A 726 718 709 712 711 703 A 727 714 740 703 713 747 708 300 122 510 C 128 721 755 728 763 764 739 707 735 720 122 741 729 742 746 743 723 737 736 738 721 745 720 748 710 122 739 736 C 737 730 724 746 731 733 734 725 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 191
EPSON Stylus Color 440/640/740 Revision A 527 524 122 117 545 548 551 (506) 546 553 552 523 519 520 527 588 521 545 548 551 554 555 521 526 525 513 528 517 550 549 550 545 548 551 545 518 528 549 522 527 550 549 587 548 551 550 545 548 551 (501) 549 119 507 759 183 (565) D - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 192
EPSON Stylus Color 440/640/740 500 751 752 752 Revision A 126 102 for EUR.,S.E.ASIA,OCEANIA EKL,RUSSIA 102 for USA 115 106 122 122 105 125 126 450 125 107 104 103 753 400 for ETT 119 400 for EAI 410 for RUSSIA 180 181 for LATIN 124 124 101 182 for LATIN 124 124 123 for EUR,S.E. - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 193
EPSON Stylus Color 440/640/740 Revision A 726 718 709 712 711 703 A 727 714 740 703 713 747 708 300 122 510 C 128 721 755 728 763 764 739 707 735 720 122 741 729 742 746 743 723 737 736 738 721 745 720 748 710 122 739 736 737 C 730 724 746 731 733 734 725 735 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 194
EPSON Stylus Color 440/640/740 Revision A 527 524 122 117 545 548 551 (506) 546 553 552 523 519 520 527 588 521 545 548 551 554 555 521 526 525 513 528 517 550 549 550 545 548 551 545 518 528 549 522 527 550 549 587 548 551 550 545 548 551 (501) 549 119 507 759 183 (565) D - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 195
EPSON Stylus Color 440/640/740 126 751 102 115 Revision B 500 766 135 106 132 133 122 122 105 125 450 752 126 125 107 125 753 119 104 766 180 752 181 for EAI, 124 LATIN 124 101 182 for LATIN 124 103 123 400 for EAI 400 for ETT For EUR,S.E.ASIA, OCEANIA,RUSSIA 400 123 401 124 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 196
EPSON Stylus Color 440/640/740 Revision B 726 718 709 727 740 747 712 713 711 708 703 714 703 300 A 598 122 510 C 128 721 755 728 763 764 739 707 735 720 122 741 729 742 746 743 723 737 736 738 721 745 720 748 710 122 739 736 C 737 730 724 731 746 733 734 725 735 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 197
EPSON Stylus Color 440/640/740 Revision B 527 524 122 117 545 548 551 (506) 546 553 552 523 519 520 527 588 521 513 521 526 525 528 517 518 528 550 549 754 (501) 119 545 548 551 545 548 551 550 549 522 527 550 549 545 587 548 551 550 549 554 507 555 183 (565) 759 184 760 D - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 198
Clamp 101 Cover, Printer;B 180 Label, Caution 1;B 102 Paper Support;B 181 Label, Accessory B 103 Stacker Assembly;B 182 Label, Accessry Timing Belt 534 Plain Washer, 4.1x0.5x6.5 566 Shaft, CR, Guide 535 Paper Guide, Front 536 Grounding Spring, Paper Eject 567 Pulley Assembly, Driven 568 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 199
, Lower 719 Holder, Edge Guide, Right 752 Absorber, Waste Ink, Large 720 Compression Spring, 1.17 753 Tray, Absorber 721 Tension Spring, 0.62 754 Spacer, Tray 722 Lever, Paper Return, Right 755 Bushing, Fixing, Shaft, Left 723 Tension Spring, 0.294 756 Paper Support, Sub, Upper Chapter - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 200
Stylus Color 740 (1/4) 100 Housing 101 Cover, Printer 102 Paper Support Assembly 103 Stacker Assembly 104 Panel Assembly 105 Shield Plate, Panel PE 554 Lever, PE 555 Torsion Spring, 0.22 556 Sheet, Guide Plate, Cable 557 Guide Plate, Cable 558 Sheet, Cable 559 Detector, HP 560 Carriage Assembly - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 201
Sub, Right 726 Pad Assy., Left 727 Lever, Pad, Release, Left 728 Holder, Edge Guide, Left 729 Lever, Paper Return, Left 730 Holder, Roller, LD, Sub, Left 731 Tray 755 Bushing, Fixing, Shaft, Left 756 Paper Support, Sub, Upper 757 Holder, Paper Support, Sub, Upper 758 Torsion Spring, 0.29 759 Cover - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 202
EPSON Stylus Color 440/640/740 A.6 Circuit Diagrams See the following pages for the circuit diagrams below. NOTE: For circuit diagram for C206MAIN-B, refer to the hard copies, as no pdf files for it is provided. C206MAIN-B circuit diagram 1/2, 2/2 See the hard copies. C255MAIN circuit diagram - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 203
EPSON Stylus Color 440/640/740 Revision B Chapter 7 Appendix C206MAIN-B Circuit diagrams 1of 2 See the hard copy. 203 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 204
EPSON Stylus Color 440/640/740 Revision B Chapter 7 Appendix C206MAIN-B Circuit diagrams 2 of 2 See the hard copy. 204 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 205
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EPSON Stylus Color 440/640/740 Chapter 7 Appendix Revision B C206PSB 1/1 208 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 209
EPSON Stylus Color 440/640/740 Chapter 7 Appendix Revision B C206PSE 1/1 209 - Epson Stylus COLOR 740 Special Edition | Service Manual - Page 210
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