Acer AL1922R AL1922r Service Guide
Acer AL1922R Manual
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- Acer AL1922R | AL1922r Service Guide - Page 1
Acer AL1922r Service Guide 1 - Acer AL1922R | AL1922r Service Guide - Page 2
Service Guide Version and Revision No. Version 1 1.0 Release Date Jun.- 15- 2005 Revision Initial release 2 - Acer AL1922R | AL1922r Service Guide - Page 3
ACER AL1922r Service Manual. Printed in Fujian. Disclaimer The information in this guide is subject to change without notice. Acer necessary servicing, repair, and any incidental or consequential damages resulting from any defect in the software. Acer is a registered trademark of Acer Corporation. - Acer AL1922R | AL1922r Service Guide - Page 4
list of this printed Service Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and service of customer machines. Warning and if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, - Acer AL1922R | AL1922r Service Guide - Page 5
mounting kit approved by the manufacturer and follow the kit instructions. Slots and openings in the back and bottom of the Please refer all servicing to qualified service personnel To ensure are normal with LCD monitor and do not indicate a problem. Notes Due to the nature of the fluorescent light, - Acer AL1922R | AL1922r Service Guide - Page 6
Support Timing Monitor Block Diagram Main Board Diagram Software Flow chart Main Board Layout Front Bezel Rear Bezel Operating Instructions Chapter 3 External Controls Front Panel Controls Adjusting the picture Hot-Key Menu OSD Message LOGO Machine Disassembly Troubleshooting Chapter - Acer AL1922R | AL1922r Service Guide - Page 7
15 pin D-sub VGA connector and 24 pin DVI connector. It also supports VESA DPMS power management and plug & play function. There is a build weight in addition MTBF target is 50k hours or more. Chart of AL1922r Panel Signal Interface Sync Type Color Temp User Adjust DDC Speaker Headphone Jack - Acer AL1922R | AL1922r Service Guide - Page 8
Electrical Requirements Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Ambient light Viewing distance Warm up time All specifications Fully functional Measuring equipment Control settings User brightness control User contrast - Acer AL1922R | AL1922r Service Guide - Page 9
LCD Monitor General Specification Panel type Display size Display mode Pixel pitch Display dot Pixel clock Contrast ratio Brightness Response time (Tr/Tf) Display color Viewing angle Pc interface Signal connector Interface frequency Plug & play Power Input voltage Total output power 19 " active - Acer AL1922R | AL1922r Service Guide - Page 10
LCD Panel Specification LCD Panel Model (AU M190EN04 V5) Display Type active matrix color TFT LCD Resolution 1280x1024 pixels Display Dot 1280x (RGB) x 1024 Display Area 376.32mm(H) x 301.06mm(V) Pixel Pitch 0.294mm(H) x 0.294mm(V) Display Color 16.2M (true) Lamp Frequency 50kHz(typ) - Acer AL1922R | AL1922r Service Guide - Page 11
LCD Panel Model (SEC LTM190EX-L01) Display Type active matrix color TFT LCD Resolution 1280x1024 pixels Display Dot 1280x (RGB) x 1024 Display Area 376.32mm(H) x 301.06mm(V) Pixel Pitch 0.294mm(H) x 0.294mm(V) Display Color 16.2M (true) Lamp Frequency 60kHz(max) Lamp Current 7.5 - Acer AL1922R | AL1922r Service Guide - Page 12
.087 N 72.1 P 28.322 25.175 75.000 66.667 74.551 60.001 74.927 N 30.240 N 57.2832 N 64.000 N 80.000 ٛ. Support Modes There will be 20 total support modes to accommodate the above mode and other video modes within the frequency range of the monitor. 85Hz refresh rate - Acer AL1922R | AL1922r Service Guide - Page 13
Monitor Block Diagram The LCD MONITOR will contain a main board, a power board (include adapter and inverter), keypad board and audio board which house the flat panel control logic, brightness control logic and DDC. The Inverter board will drive the backlight of panel. The adapter will provide the - Acer AL1922R | AL1922r Service Guide - Page 14
Main Board Diagram EEPROM 24C16 MCU OSD Control Interface (Keypad) LCD Interface Scaler TSU56AK LF (Include: ADC, OSD etc) DVI Connector EEPROM 24C02 D-SUB Connector EEPROM 24C02 Crystal 14.318MHZ 14 - Acer AL1922R | AL1922r Service Guide - Page 15
Software Flow Chart 1 Y 2 3 N 4 N 5 Y 6 N 7 8 Y 9 N 10 11 Y N 12 N 13 Y Y N 14 15 16 Y 17 N 18 19 Y 15 - Acer AL1922R | AL1922r Service Guide - Page 16
Remark: 1) MCU initializes. 2) Is the EEPROM blank? 3) Program the EEPROM by default values. 4) Get the PWM value of brightness from EEPROM. 5) Is the power key pressed? 6) Clear all global flags. 7) Are the AUTO and SELECT keys pressed? 8) Enter factory mode. 9) Save the power key status into - Acer AL1922R | AL1922r Service Guide - Page 17
Main Board Layout LABEL U201 U202 U401 U601 CN201 CN301 CN302 CN503 X401 X601 PART NO. 56G 563 31 56G 563 7 56G 562 82 56L1125137SZ7 33G8027 12 88G 35315F HS 88G 35424F HS 33G802724B H 93G 22 53 93G 22 55 H DESCRIPTION AI1117D-1.8-EI AIC1084-33PM TSU56AK-LF W78E65-40 WAFER 2*6P 2.0MM R/A D-SUB - Acer AL1922R | AL1922r Service Guide - Page 18
Front Bezel Item 1. 2. 3. 4. 5. >/Volume - Acer AL1922R | AL1922r Service Guide - Page 19
Rear Bezel Item 1. 2. 3. 4. Description D-SUB CABLE DVI CABLE AUDIO CABLE AC POWER CORD 19 - Acer AL1922R | AL1922r Service Guide - Page 20
Operating Instructions Chapter 2 Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By - Acer AL1922R | AL1922r Service Guide - Page 21
Front Panel Control • /Power Button: Press this button to turn the monitor ON or OFF, and display the monitor's state. • /Menu / Enter: Activate OSD menu when OSD is OFF or activate/de-activate adjustment function when OSD is ON or Exit OSD menu when in Volume Adjust OSD status. • - Acer AL1922R | AL1922r Service Guide - Page 22
Adjusting the Picture a. How to Adjust a Setting 1. Press the MENU-button to activate the OSD window. 2. Press to select the desired function. 3. Press the MENU-button to select the function that you want to adjust. 4. Press < or >to change the settings of the current function. 5. To exit and - Acer AL1922R | AL1922r Service Guide - Page 23
b. The Description For Control Function Main Menu Sub Menu Sub Menu Item Icon Icon Description Contrast Adjusts the contrast between the foreground and background of the screen image. Brightness Adjusts the background brightness of the screen image. Focus Adjust picture Focus (available - Acer AL1922R | AL1922r Service Guide - Page 24
Main Menu Sub Menu Sub Menu Item Icon Icon Description Analog N/A Select input signal from analog (D-Sub) (Dual-Input Model) Digital Information Reset N/A Select input signal from digital (DVI) Show the resolution, H/V frequency and input port of current N/A input timing. Clear each old - Acer AL1922R | AL1922r Service Guide - Page 25
adjustment. The Audio will be Mute when volume=0 OSD Message a. Outline b. The Description For OSD Message Item Auto Config Please Wait Input Not Supported Cable Not Connected No Signal Description 1. When Analog signal input, if User Press Hot-Key "Auto", will show this message, and the monitor - Acer AL1922R | AL1922r Service Guide - Page 26
Logo When the monitor is power on, the LOGO will be showed in the center, and disappear slowly. How To Optimize The DOS-Mode Plug And Play Plug & Play DDC1/2B Feature This monitor is equipped with VESA DDC1/2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host - Acer AL1922R | AL1922r Service Guide - Page 27
Machine Disassembly Chapter 3 This chapter contains step-by-step procedures on how to assemble the monitor for maintenance. Disassembly Procedure Disassemble the base 1. Remove four screws to release stand base. (Fig 1) 2. Remove the hinge. (Fig 2) Fig 1 Fig 2 27 - Acer AL1922R | AL1922r Service Guide - Page 28
Disassemble the front cover 1. Remove four screws to release front bezel and rear bezel. (Fig 3) 2. Remove connector wire with keyboard and main board. (Fig 4) 3. Remove two screws to release keyboard. (Fig 5) 4. Remove connector wire with keyboard and speakers. (Fig 6) 5. Remove four screws to - Acer AL1922R | AL1922r Service Guide - Page 29
Fig 5 Fig 6 Fig 7 29 - Acer AL1922R | AL1922r Service Guide - Page 30
Disassemble the rear bezel Disassemble the shield 1. Remove two screws to release the shield. (Fig 8) 2. Remove the shield as arrow direction. Fig 8 30 - Acer AL1922R | AL1922r Service Guide - Page 31
Disassemble the audio board 1. Remove two screws to release audio board. (Fig 9) 2. Remove connector wire with audio board and power board. (Fig 10) Fig 9 Fig10 31 - Acer AL1922R | AL1922r Service Guide - Page 32
Disassemble the main board 1. Remove three screws to release main board. (Fig 11) 2. Remove connector wire with main board and panel. (Fig 12) 3. Remove connector wire with main board and power board. (Fig 13) Fig 11 Fig 12 Fig13 32 - Acer AL1922R | AL1922r Service Guide - Page 33
Disassemble the power board 1. Remove five screws to release power board. (Fig 14) 2. Remove connector wire with power board and panel. (Fig 15) Fig 14 Fig 15 33 - Acer AL1922R | AL1922r Service Guide - Page 34
Disassemble the panel 1. Remove four screws (right and left) to release metal frame. (Fig 16) Fig16 34 - Acer AL1922R | AL1922r Service Guide - Page 35
This chapter provides troubleshooting information for the AL1922r: 1. No power Chapter 4 No power Press power key and look if the picture is normal NG Please reinsert and make sure the AC of 100- - Acer AL1922R | AL1922r Service Guide - Page 36
2. No picture (LED is orange) No picture Measure U201 PIN2=2.5V U202 PIN2=3.3V OK NG X401 oscillate waveforms are normal OK NG Replace U201, U202 Replace X401 Check if the sync signal from computer is output and video cable is connected normally NG OK Replace U401 Input the sync signal of - Acer AL1922R | AL1922r Service Guide - Page 37
3. Panel Power Circuit Measure Q402 base is high level? OK NG Check Q203 and Q204 are broken or CN503 solder? Measure U201 PIN2=2.5V U202 PIN2=3.3V OK NG Replace U201, U202 Check Correspondent component. NG OK Replace PANEL X401 oscillate waveforms are normal NG OK Replace X401 Replace - Acer AL1922R | AL1922r Service Guide - Page 38
4.Keypad Board OSD is unstable or not working NG Is Keypad board connecting normally? Connect Keypad Board OK Is Button Switch normally? OK Is Keypad board normally? OK Check main board NG Replace Button Switch NG Replace Keypad Board 38 - Acer AL1922R | AL1922r Service Guide - Page 39
5. PWPC No Power No power Check AC line volt 110V or 220V NG OK Check AC line Check the voltage of C905(+) OK NG Check start voltage for the pin3 of IC901 OK NG Check F901, bridge rectified circuit Check R906, R907,IC901 Check the auxiliary voltage is between 10V-16V OK NG Check D910, - Acer AL1922R | AL1922r Service Guide - Page 40
No Backlight Check C201 (+) =12V OK NG Check ON/OFF signal OK NG Check U201 pin9=12V ? NG OK Change F902 Check D201/Q209/Q210/ D202/Q211/Q212 Check Interface board Change Q201 or Q202 Check the pin1 of U201 have saw tooth wave OK NG Change U201 Check D201 (-), D202 (-) has the output of - Acer AL1922R | AL1922r Service Guide - Page 41
6.No Audio Mute and volume setting is ok? NG OK Check power supply of U201 is 12 V? Reset mute and volume NG OK Check input signal of U201is ok? Check connecting is ok? NG Reconnect NG OK Check correspondent component Replace U201 NG Replace speaker 41 - Acer AL1922R | AL1922r Service Guide - Page 42
Connector Information The following figure shows the connector locations on the monitor board: Chapter 5 PIN NO. 1. 2. 3. 4. 5. 6. 7. 8. 1 5 6 10 11 15 15 - Pin Color Display Signal Cable (D-sub) DESCRIPTION Red Green Blue Monitor Ground DDC-Return R-Ground G-Ground B-Ground PI N NO. 9. - Acer AL1922R | AL1922r Service Guide - Page 43
) listing in global configurations of AL1922r.Refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise this printed Service Guide. You MUST use the local FRU list provided by your regional Acer office to order FRU parts for repair and service of customer machines - Acer AL1922R | AL1922r Service Guide - Page 44
Exploded Diagram (Model: AL1922r) 44 - Acer AL1922R | AL1922r Service Guide - Page 45
Part List Item 1. Picture 2. 3. 4. 5. 6. 7. 8. Description Hinge cover Part No. 34G1343 FV B Stand base 34G1342 FV B Front cover 34G1335BGE B Rear cover 34G1336AFV 2B Shield Metal frame 85G 666 1 15G8021 5 Panel 750LLU90N45/750LLS90EX1 Audio board AUPC980AE 45 - Acer AL1922R | AL1922r Service Guide - Page 46
Power board 9. PWPC1942AUA9 10. Main board CBPC980KS2AE 11. Key board KEPC980KA8 12. Speakers 78G 332 1 L / 78G 332 1 R 46 - Acer AL1922R | AL1922r Service Guide - Page 47
Schematic Diagram Chapter 7 For AU panel Analog and Digital Input D322 D323 TZMC5V6-GS08 TZMC5V6-GS08 2 3 1 2 3 1 2 3 1 R326 75` 1/16W R327 75` 1/16W CN301 DB15 11 1 RXD 6 TXD 6 6 12 2 7 13 3 8 14 4 9 PC5V 15 5 10 VGA_CON FB301 FB302 FB303 0` 1/16W 0` 1/16W 0` 1/16W R325 - Acer AL1922R | AL1922r Service Guide - Page 48
TSU56AK VAD VPLLVDVI VDPLL VPO VDD 2 VCC3.3 18 87 97 117 126 21 84 94 104 114 11 53 AVDD_PLL 45 51 35 AVDD_MPLL 55 65 U401 VDDP VDDP VDDP VDDP VDDP AVDD_DVI AVDD_DVI AVDD AVDD 3 RIN 3 GNDR 3 GIN 3 GNDG 3 SOG 3 BIN 3 GNDB 3 HSYNC 3 VSYNC 63 62 60 RIN0 RIN0M 59 61 58 57 - Acer AL1922R | AL1922r Service Guide - Page 49
Power Supply VCC5V CN201 GND 1 GND 3 VCC12V 5 GND 7 VCC5V 9 GND 11 2 ON_OFF 4 DIM 6 VCC12V 8 GND 10 VCC5V 12 GND CONN VCC5V 4 AdjBACKLITE R203 1K` 1/16W Brightness R205 4.7K` 1/16W 1 C BE 2 3 R204 10K` 1/16W Q202 PMBS3904 C202 + 220uF/25V C206 1uF/25V VCC12V VCC12V 6 R201 4.7K` - Acer AL1922R | AL1922r Service Guide - Page 50
Panel interface 4 PA[0..9] 4 PB[0..9] PA[0..9] PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 PA8 PB[0..9] PA9 PB0 PB1 PB2 PB3 PB4 PB5 PB6 PB7 PB8 PB9 LVA3P LVA3M LVACKP LVACKM LVA2P LVA2M LVA1P LVA1M LVA0P LVA0M LVB3P LVB3M LVBCKP LVBCKM LVB2P LVB2M LVB1P LVB1M LVB0P LVB0M LVB0M LVB1M LVB2M LVBCKM - Acer AL1922R | AL1922r Service Guide - Page 51
Audio OUT_LOUT_R VOLUME 12V CN202 WAFER 2*7P 2.54mm MUTE 13 14 11 12 9 10 7 8 5 6 3 4 1 2 +12V + + C201 C202 470uF/16V 470uF/16V C203 0.1uF CN204 1 2 3 33L8022-3A-H FEMALE R201 10K` R203 10K` GND C211 100 pF GND 5.6K` 5.6K` R210 R211 R212 220K` C204 0.47uF 4 INL - Acer AL1922R | AL1922r Service Guide - Page 52
Power board (adapter + inverter) 52 - Acer AL1922R | AL1922r Service Guide - Page 53
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