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Epson 680Pro Service Manual - Page 56

Table 3-14. Fatal Error indication, Table 3-15. Fastal Error indication

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EPSON Stylus COLOR 680/777/777i Table 3-14. Fatal Error indication Step No. Detail phenomenon Check point Remedy 1. Check if the Torsion spring 0.22 comes off on the both HP sensor lever. HP sensor lever 1. Set the Torsion spring 0.22 on the HP sensor lever. Torsion spring 0.22 2. Check if the Torsion spring 0.22 comes off on the both PE sensor 2. Set the Torsion spring 0.22 on the PE sensor lever. When the printer is lever. turned on, the printer 1 continue the paper Tension spring 0.22 eject sequence even if the paper is not in the paper path. PE sensor lever 3. Check if the CN4 connector cable is connected on the CN4 on the Main board or sensor. 4. Check if the HP/PE sensor work correctly by using the tester. Refer to Table 3-2. 3. Connect the CN4 connector cable to the CN4 on the Main board. 4. Replace the HP/PE sensor with new one. 5. If the problem is not solved, replace the Main board with new one. Revision B Table 3-15. Fastal Error indication Step No. Detail phenomenon Check point Remedy 1. Check if the CR 1. Connect the CR motor motor connector is connected CN12 on the Main board. connector to the CN12 on the Main board. When the printer is 2. Check if the coil 2. Replace the CR motor 2 turned on, the CR unit dose not move at all in resistance of the CR motor is about 7.8ohm with new one. the power on sequence. by using the tester. Refer to Table 3-1. 3. If the problem is not solved, replace the Main board with new one. 1. Check if the PF motor 1. Connect the PF motor connector is connected connector to the CN7 on to the CN7. the Main board. When the printer is 2. Check if the PF motor 2. Replace the PF motor 3 turned on, PF roller dose not rotate at all in coil resistance is about 7.8 ohm by using with new one. the power on sequence. tester. 3. If the problem is not solved, replace the Main board with new one. Troubleshooting Troubleshooting with LED Error Indications 56

Section	Page
PRODUCT DESCRIPTION	9
1.1 FEATURES	10
1.2 SPECIFICATIONS	11
1.2.1 Physical Specification	11
1.2.2 Printing Specification	11
1.2.3 Paper Feeding	12
1.2.4 Input Data Buffer	12
1.2.5 Electric Specification	12
1.2.6 Environmental Condition	13
1.2.7 Reliability	13
1.2.8 Safety Approvals	13
1.2.9 Acoustic Noise	13
1.2.10 CE Marking	13
1.3 INTERFACE	14
1.3.1 Parallel Interface (Forward Channel)	14
1.3.2 Parallel Interface (Reserve Channel)	17
1.3.3 USB Interface	18
1.3.4 Prevention of Data Transfer Time-out	19
1.3.5 Interface Selection	19
1.3.6 IEEE1284.4 Protocol	19
1.4 OPERATOR CONTROLS	20
1.4.1 Operating Switch	20
1.4.2 Control Panel	20
1.4.2.1 Switches	20
1.4.2.2 Indicators	20
1.4.3 Panel Functions	21
1.4.4 Printer Condition and Panel Status	22
1.4.5 Printer Initialization	22
1.4.6 Errors	23
1.5 PAPER	24
1.5.1 Paper Handling	24
1.5.2 Paper Specification	24
1.5.2.1 Cut Sheet	24
1.5.2.2 Transparency, Glossy Paper	24
1.5.2.3 Envelope	24
1.5.2.4 Index Card	25
1.5.3 Printing Area	26
1.5.3.1 Cut Sheet	26
1.5.3.2 Envelopes	27
1.6 INK CARTRIDGE	28
1.6.1 Black Ink Cartridge	28
1.6.2 Color Ink Cartridge	28
Operating Principles	29
2.1 Overview	30
2.1.1 Printer Mechanism	30
2.1.2 Printhead	31
2.1.2.1 Printing Process	32
2.1.2.2 Printing Method	32
2.1.3 Carriage Mechanism	33
2.1.4 Paper Feeding Mechanism	34
2.1.5 Paper Loading Mechanism (ASF Unit)	35
2.1.6 Ink System Mechanism	38
2.1.6.1 Pump Unit & Wiper mechanism	38
2.1.6.2 Capping Mechanism	39
2.2 Electrical Circuit Operating Principles	40
2.2.1 C383 PSB/PSE board	40
2.2.2 C383 MAIN Board	43
2.2.2.1 Main elements	44
2.2.2.2 Printhead Driver Circuit	45
2.2.2.3 PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit	46
2.2.2.4 CR Motor Driver Circuit	46
2.2.2.5 Reset Circuit	47
2.2.2.6 EEPROM Control Circuit	47
2.2.2.7 Sensor Circuit	48
Troubleshooting	49
3.1 Overview	50
3.2 Troubleshooting with LED Error Indications	51
Disassembly and Assembly	61
4.1 Overview	62
4.1.1 Precautions	62
4.1.2 Tools	63
4.1.3 Work Completion Check	64
4.2 Disassembly	65
4.2.1 Housing removal	66
4.2.2 Operation Panel removal	67
4.2.3 Printhead removal	68
4.2.4 CR motor removal	71
4.2.5 Waste drain ink pad unit removal	73
4.2.6 Circuit board removal	75
4.2.7 LD Roller removal	79
4.2.8 HP/PE Sensor removal	83
4.2.9 Ink system unit removal (Cap & Pump unit )	85
4.2.10 Paper Eject Roller removal	87
4.2.11 PF motor removal	89
4.2.12 CR unit removal	91
4.2.13 Paper feed roller removal	94
4.2.14 Disassembling ASF frame unit	97
Adjustment	100
5.1 Overview	101
5.1.1 Required Adjustment	101
5.1.2 Adjustment Program feature	102
5.1.3 Adjustment Program Installation Procedure	103
5.1.4 Adjustment Program Initial Setting menu	103
5.1.5 Head ID Input	103
5.1.6 Bi-D Adjustment	105
5.1.7 USB ID input	107
5.1.8 Head Cleaning Operation	109
5.1.9 Initial Ink Charge Operation	110
5.1.10 Refurbishment for DOA	111
5.1.11 Protection Counter Check/Reset	112
5.1.12 Check pattern printing	114
5.1.13 EEPROM check function	115
5.1.14 CSIC Information	116
Maintenance	117
6.1 Overview	118
6.1.1 Cleaning	118
6.1.2 Service Maintenance	119
6.1.3 Lubrication	119
Appendix	123
7.1 Connector Summary	124
7.1.1 Major Component Unit	124
7.1.2 EEPROM Address Map	127
7.2 Component Layout	131
7.3 Exploded Diagram	133
7.4 Parts List	138

Match case Limit results 1 per page

EPSON Stylus COLOR 680/777/777i

Revision B

Troubleshooting

Troubleshooting with LED Error Indications

Table 3-14. Fatal Error indication

Step

No.

Detail phenomenon

Check point

Remedy

When the printer is

turned on, the printer

continue the paper

eject sequence even if

the paper is not in the

paper path.

1. Check if the Torsion

spring 0.22 comes off

on the both HP sensor

lever.

2. Check if the Torsion

spring 0.22 comes off

on the both PE sensor

lever.

3. Check if the CN4

connector cable is

connected on the CN4

on the Main board or

sensor.

4. Check if the HP/PE

sensor work correctly

by using the tester.

Refer to Table 3-2.

1. Set the Torsion spring

0.22 on the HP sensor

lever.

2. Set the Torsion spring

0.22 on the PE sensor

lever.

3. Connect the CN4

connector cable to the

CN4 on the Main board.

4. Replace the HP/PE

sensor with new one.

5. If the problem is not

solved, replace the Main

board with new one.

Torsion spring

0.22

Tension spring

0.22

PE sensor lever

Table 3-15. Fastal Error indication

Step

No.

Detail phenomenon

Check point

Remedy

When the printer is

turned on, the CR unit

dose not move at all in

the power on sequence.

Check if the CR

motor connector is

connected CN12 on

the Main board.

2. Check if the coil

resistance of the CR

motor is about 7.8ohm

by using the tester.

Refer to Table 3-1.

1. Connect the CR motor

connector to the CN12

on the Main board.

2. Replace the CR motor

with new one.

3. If the problem is not

solved, replace the Main

board with new one.

When the printer is

turned on, PF roller

dose not rotate at all in

the power on sequence.

Check if the PF motor

connector is connected

to the CN7.

Check if the PF motor

coil resistance is about

7.8 ohm by using

tester.

1. Connect the PF motor

connector to the CN7 on

the Main board.

2. Replace the PF motor

with new one.

3. If the problem is not

solved, replace the Main

board with new one.

HP sensor lever