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Acer AL2002 Service Manual

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Service Manual
01. Product Overview---------------------------------------------------------------------------------------02
02. General Requirement----------------------------------------------------------------------------------02
03. Electrica Related Information------------------------------------------------------------------------ 03
04. Flat Panel------------------------------------------------------------------------------------------------ 12
05. Optical Characteristics-------------------------------------------------------------------------------- 14
06. Environmental Requirements------------------------------------------------------------------------ 16
07. RGB settings---------------------------------------------------------------------------------------------17
08. Color grayscale linearity-------------------------------------------------------------------------------17
09. Packing Drawing----------------------------------------------------------------------------------------18
10. Exploded Diagram--------------------------------------------------------------------------------------19
11. Schematics and Layouts-------------------------------------------------------------------------------20
Appendixes:
Appendix-1 Product Matrix
Appendix-2 User s Manual
Appendix-3 Quick Start Guide
Appendix-4 Spare Parts List

Table of Contents

-------------------------------------------------------------------------------------01
ACER_LCD_AL2002W_SM061206V0
LCD Color Monitor: T20BNUW-G1
Model Name: ACER AL2002W-Dual

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Summary of Contents for Acer AL2002

  • Page 1: Table Of Contents

    08. Color grayscale linearity-------------------------------------------------------------------------------17 09. Packing Drawing----------------------------------------------------------------------------------------18 10. Exploded Diagram--------------------------------------------------------------------------------------19 11. Schematics and Layouts-------------------------------------------------------------------------------20 Appendixes: Appendix-1 Product Matrix Appendix-2 User s Manual Appendix-3 Quick Start Guide Appendix-4 Spare Parts List ACER_LCD_AL2002W_SM061206V0 LCD Color Monitor: T20BNUW-G1 Model Name: ACER AL2002W-Dual Table of Contents...

  • Page 2: Important Safety Notice

    To ensure using a proper screwdriver, follow the torque/force listed in assembly and disassembly procedures to unscrew screws. Using Lead-Free solder to well mounted the parts. The fusion point of Lead-Free solder requested in the degree of 220°C. Important Safety Notice ACER AL2002W Go to cover page...

  • Page 3: Product Overview

    Go to cover page Product Overview: This document defines the design and performance requirements for the Liteon standard 20” wide flat panel monitor. The display element shall be a 20” inch diagonal, WSXGA (1680 x 1050) resolution, TFT-LCD (Thin Film Transistor Liquid Crystal Display.

  • Page 4: Electrica Related Information

    2.2 Test Equipment The reference signal source is a calibrated Chroma 2326 or Quantum 801GD video generator. The use of other signal generators during qualification and production is acceptable provided the product complies with this specification. ELECTRICAL RELATED INFORMATION: This section describes the electrical requirement of the monitor. The block diagram in Figure 1 illustrates the various electrical sub-system.
  • Page 5 3.2. Product Specification ITEM Frequency Ranges Max Pixel clock RGB Input Level Analog Signal Input RGB Input Impedance Sync Input Signal Sync Input Impedance Frequency Ranges Digital Signal Input Max Pixel clock DVI Input Level DVI Input Impedance AC power Connectors Input connectors AC IN 90~264V...
  • Page 6 Go to cover page 3.3.2. Signal Connectors and Cable The analog signal cable shall be black and 1800 mini-meters, the digital signal cable shall be black and 1800 mini-meters, At the end of the analog cable shall be a molded-over, shielded, triple row, 15 position and blue color D subminiature connector.
  • Page 7 D. Flat Panel Connector 3.4. Input Signals (Analog RGB Signal Input): 3.4.1. Video Input Signal Ranges Symbol Horizontal Frequency Vertical Frequency Fclk Locked Pixel Clock Frequency Hi Level Input Low Level Input Video RGB Analog Video Level Note : 2.2kΩ to Ground, Schmitt-Triggers Input, Supported 3.3V device H & V sync. Output. Item Normal Go to cover page...
  • Page 8 Go to cover page 3.4.2. Video Signal Amplitudes The three video inputs consist of Red, Green, and Blue signals, each with its own coaxial cable terminated at the monitor. These video signals are analog levels, where 0V corresponds to black, and 735 mV is the maximum signal amplitude for the respective color, when each signal is terminated by a nominal 75.0 ohm.
  • Page 9 3.5. Interface Boards (Digital TMDS Input) 3.5.1. The interface board will house the Panel-Link receiver , and transmitting TTL level signals into LCD Module to driver the LCD display circuit. 3.5.2. Video Signal Amplitudes This video inputs consist of TX 0 ±, TX 1 ±, TX 2 ± and CLK ± signals, each with its own shielded twisted pair. These video signals are digital levels, when each signal pair is terminated by a normal 100 ohms .The panel-Link signal transmitting over the cable is based on 3V DC offset with ±...
  • Page 10 Go to cover page B. OSD Controls Item Brightness Contrast Color Temperature Auto Adjust Left/Right Up/Down Pixel Clock Phase OSD Language Recall Defaults OSD Position 3.7. Monitor Modes and Timing Capability: 3.7.1. Format and Timing The monitor shall synchronize with any vertical frequency from 56 to 76 Hz, and with any horizontal frequency from 30 to 81 KHz.
  • Page 11 Go to cover page Preset Timing Chart Chroma Timing NOTE: (1)76Hz FV: monitor can display but doesn’t guarantee. ≦ (2) FH＞=85KHz, or Fv＞=80Hz: Power Save (OSD warning invalid mode). 3.8. Controller Requirements 3.8.1. General Requirements The monitor shall include a controller capable of converting the analog RGB signal from a standard WSXGA resolution video controller in the CPU to a signal which can be displayed on the panel.
  • Page 12 Table 2. AC TO DC Converter Requirements The operating range shall be from 90 to 132 and 195 to 240 VAC sinusoidal for all Input Voltage Range models specified. Input power frequency range shall be from 47.5 to 63Hz over the specified input Input Frequency Range voltage range.

  • Page 13: Flat Panel

    Go to cover page FLAT PANEL: 4.1. General Requirements The panel used as the display device shall be a WSXGA resolution, 20” diagonal, TFT-LCD. 4.2. Panel Timings The controller included with the monitor shall translate all video timings from the CPU that meet the timing requirements listed in Panel specification into timings appropriate for the panel.
  • Page 14 4.5.2. Display Degradation Over the life of the product, variation of the parameters specified in Panel specification shall be maintained within reasonable limits. The panel must not exhibit any significant defects while in operation (excluding the CCFL operation). This does not in any way change the warranty given by the panel manufacturer. 4.5.3.

  • Page 15: Optical Characteristics

    Go to cover page 4.5.6. Smudges, Streaks and Smears When viewing the panel oriented so as to maximize reflected light, there shall be no visible smudging, streaking, smearing or other non-uniformity from contaminants, fingerprints, or defects in any of the visible surfaces.
  • Page 16 5.2. Contrast ratio (CR) The contrast ratio is determined by using a photometer (CA-210) to measure the maximum and minimum luminance in front of monitor after at least 30 minutes warm up. It shall be test at 1680x1050/60Hz mode and full white/full black square pattern with contrast/brightness in default value.

  • Page 17: Environmental Requirements

    Go to cover page 5.5. Chromaticity The color chromaticity is measured by a photometer (CA-210) at 1680x1050/60Hz mode and full white square pattern with contrast/brightness in default value. The x and y co-ordinates for 9300K, 8200K, 7500K, 6500K and 5000K. Preset mode shall be as below: 9300K Preset : 0.253 x 0.313 ;...

  • Page 18: Rgb Settings

    6.4. Vibration Test Procedure 6.4.1. Vibration System. Perform in accordance with Liteon Spec. 6.4.2. Fixturing. The packaged product shall be secured to the vibration table to prevent the package from moving off the vibration surface during test. 6.4.3. Test Axes. The packaged product shall undergo random profile vibration on all six (6) surfaces for a duration of 30 minutes per surface.

  • Page 19: Packing Drawing

    ACER AL2002W Go to cover page 9. PACKING EXPLODED DRAWING: 10 10 SIGNAL CABLE SIGNAL CABLE DVI CABLE OPTION DVI CABLE OPTION 13 13 ITEM ITEM QT Y ' QT Y ' PART NO PART NO 7749205865P0A 7749205865P0A 7749106340P0A 7749106340P0A...

  • Page 20: Exploded Diagram

    8 7742303000P0A LENS-LED 9 7742808011P0A PUSH-BUTTON 11 7742005070P0A RUBBER 12 7740416041P0A BASE STAND 13 7742616171P0A STAND COVER 14 7742616161P0A HINGE COVER 15 7738001670P0A HINGE ASS'Y ACER AL2002W Go to cover page PART NAME Q'TY POWER BD INTERFACE BD PANEL FUNCTION KEY BD...
  • Page 33 Front Bezel and LCD module assembly S21 Use a cross-head screwdriver screwed the No.1~2 screws. S22 Connect the Key Function cable to the P306 connector. ACER AL2002W ACER AL2002W ASSEMBLY PROCEDURES Parts Usage Part Number Part Name 7737816290P0A BRACKET ASSY_CHASSIS_ACER T20BNUW_SGCC...
  • Page 34 Key Function Board assembly S23 Use a cross-head screwdriver screwed the No.3~4 screws. Put a Rear Bezel covered the previous assembled Rear Bezel assembly LCD module until both units are firmly attached through the way pressing the 1~4 positions in priority order. S25 Use a cross-head screwdriver screwed the No.1~4 screws.
  • Page 35 LCD panel and Bracket Chassis module. module. S14 Tear off the Aluminum tape. Disconnect the FFC cable S15 Disconnect the FFC cable to LCD panel. ACER AL2002W ACER AL2002W DISASSEMBLY PROCEDURES Parts Usage Part Number Part Name 6715011603P00 CABLE_VIDEO_DSUBx2_1800mm_BLK_20276#30 7749001520P0B BAG_LDPE_ORDINARY_ALL MODEL_L600xW780x 7749106340P0A CUSHION FORM_EPS_JADE 20W_1232SETS_LEFT&RIGHT...

  • Page 36: Chassis Base

    Separate LCD panel module and S16 Lift the Bracket Chassis module up and put it aside. Bracket Chassis module apart Put a panel on a protective cushion and exame the surface see if has any unexpect dust or scratch. Panel inspection S18 Turn over the panel that metal side is faced up.

  • Page 37: Power Board

    Check Q803, R813, R814, D806 whether to be damaged Check D804 and R807 whether to be damaged Check D809, D810, C818, C824, C823, C817, C822, T802 whether to be damaged. ACER AL2002W Go to cover page...
  • Page 38 ACER AL2002W Go to cover page Inverter circuit on the power board Check C102 pin is around 5V On/Off pin is greater than 2V Brightness pin is an external PWM. Check pin2 of I101 is 5V Check if P101, P102, P103, and P104 are connected correctly.
  • Page 39 (VGA or DVI) Proceed to ’Checking the resolution change IC movement’ section ACER AL2002W Go to cover page Proceed to ‘No OSM display’ section Input the sync signal of computer or change the cable (VGA or DVI)
  • Page 40 ACER AL2002W Go to cover page Nothing displays on the screen (screen is black, colour of LED is green.) Is backlight lit? Does computer output RGB video signals? (VGA or DVI) Check OSM menu to display on the screen when you press ‘MENU’...
  • Page 41 2. R305 is open or short. 3. I306 is failure. Failure Point: 1. Printed wire is open between P301 pin3 ,R304, Q301, R301, R302 and I306 pin50. 2. R304,Q301,R301 or R302 is failure. 3. I306 is failure. ACER AL2002W Go to cover page...
  • Page 42 ACER AL2002W Appendix 4: Troubleshooting Go to cover page Abnormal Screen: Abnormal screen for VGA source Failure Point: Check the R.G.B video signals from 1. No R.G.B video signals output from host computer. Check the computer. computer input on P302 of video connector 2.
  • Page 43 In the case of the RX2+ signal (A RX1, 0, and RXC signal is same path, too) 1. DVI-D video cable is failure. 2. R332~R335, R338~R341 may be open. 3. I306 is damaged. Failure Point: Printed wire is open between I306 and P306. ACER AL2002W Go to cover page...
  • Page 44 ACER AL2002W Go to cover page Abnormal OSM display adjust problem Check the input TTL level whether to change when press the function keys on the P307 pin3, pin4 (normal is high level when to press button, the level will be changed.)
  • Page 45 1. Printed wire is broken between P302 pin9 and I304 pin8 2. D307 or D308 is damaged. Failure Point: The VGA video cable is damaged. If I304 pin5, pin6 LOW, the I304 may be failure. Failure Point: I304 is defected. ACER AL2002W Go to cover page...
  • Page 46 ACER AL2002W Go to cover page Abnormal plug and play operation for DVI - D Confirm the host computer supplies DDC2 mode. Check the voltage on P303 pin14 that is power DC 5V. Check the voltage on I305 pin8 1. Check the voltage on P301 or P302 pin6 and pin7 that is serial data and clock signal.
  • Page 47 3. R323 and C327 may be short. 4. D305 is short. Failure Point: DVI-I Video cable is damaged. Failure Point: 1. Printed wire is open between P303 and I306 pin89. 2. R332~R335 R338~R341 may be open. ACER AL2002W Go to cover page...
  • Page 48 ACER AL2002W Go to cover page Checking the resolution change IC movement 1. Check +3V3 supplied on I306 pin2, pin25, pin53, pin47, pin74, pin82, pin91, pin92, pin101. pin110, pin116 2. Check +3V3 supplied on I309 pin8. 1. Check +1V8 supplied on I306 pin55, pin87, pin17, pin118, pin70, pin78, pin104, pin106.
  • Page 49 Model Name: ACER_AL2002W Model Number: 4092531143P Description: T20BNUW-G1(99)#U14(C)_ACER_AL2002W BOARD ASSY'S FOR U.S.A. CKD_ID (LITE-ON Part No.) 5112403532P 5113102727P 5113301834P 5113800401P 5114300811P CAPACITORS FOR U.S.A. CKD_ID (LITE-ON Part No.) C101 6338110485P C102 6311522045P C103 6311522945P C104 6331133125P30 C105 6338210215P C106 6338147385P C108 6331168055P30 C109...
  • Page 50 CAPACITORS FOR U.S.A. CKD_ID (LITE-ON Part No.) C310 6311210069P20 C311 6373410486P01 C312 6373410486P01 C313 6311210069P10 C313 6311210069P20 C314 6311310142P20 C315 6311210069P10 C315 6311210069P20 C316 6311310142P20 C317 6371210306P01 C318 6371210306P01 C319 6371210306P01 C320 6371210306P01 C321 6373410486P01 C322 6373410486P01 C323 6373410486P01 C324 6371210306P01 C325 6371210306P01...
  • Page 51 CAPACITORS FOR U.S.A. CKD_ID (LITE-ON Part No.) C358 6373410486P01 C359 6373410486P01 C360 6373410486P01 C361 6373410486P01 C362 6371110056P01 C363 6311210069P10 C363 6311210069P20 C364 6373410486P01 C365 6373410486P01 C366 6373410486P01 C367 6373410486P01 C368 6311210069P10 C368 6311210069P20 C369 6373410486P01 C370 6373410486P01 C371 6373410486P01 C372 6373410486P01 C373 6371110056P01...
  • Page 52 CAPACITORS FOR U.S.A. CKD_ID (LITE-ON Part No.) C820 6302433262P C821 6338210215P C822 6311210245P C822 6311210245P22 C823 6311210245P C823 6311210245P22 C824 6311210245P C824 6311210245P22 C825 6302433262P C827 6357110355P C828 6311547945P10 C828 6311547945P24 C830 6338547215P30 C851 6338110485P30 COILS AND FILTERS FOR U.S.A. CKD_ID (LITE-ON Part No.) FB301...
  • Page 53 CABLES AND CONNECTORS AND PLUGS FOR U.S.A. CKD_ID (LITE-ON Part No.) G801 7748000190P0A GND1 6714010003P33 P101 6610020051P P101 6610020051P70 P102 6610020051P P102 6610020051P70 P103 6610020051P P103 6610020051P70 P104 6610020051P P104 6610020051P70 P301 6613100010P P302 6642150411P P302A 6715011603P00 P303 6649001012P40 P303 6649001012PH0 P306 6640030005P20...
  • Page 54 DIODES FOR U.S.A. CKD_ID (LITE-ON Part No.) D301 6412019518P D301 6412027818P10 D302 6412019518P D302 6412027818P10 D303 6412019518P D303 6412027818P10 D304 6414056038P D304 6414056108P D305 6414056038P D305 6414056108P D306 6414056038P D306 6414056108P D307 6413030038P D308 6414056038P D308 6414056108P D309 6414056038P D309 6414056108P D310 6414056038P...
  • Page 55 DIODES FOR U.S.A. CKD_ID (LITE-ON Part No.) D808 6412010907P D809 6412000020P00 D809 6412027820PG0 D810 6413045010P00 D810 6413045020PG0 D811 6414240054P D812 6412010907P ZD801 6414220024P FOR U.S.A. CKD_ID (LITE-ON Part No.) I101 6442046300P18 I301 6427000018P50 I301 6444014708P I302 6442023326P I302 6442023348P I303 6442043308P I303 6442043318P...
  • Page 56 FOR U.S.A. CKD_ID (LITE-ON Part No.) R121 6224610034P R122 6224613024P R125 6213230557P R126 6224636514P R128 6224613024P R130 6224640204P R131 6212120054P00 R132 6212120254P R133 6212120054P00 R134 6212110254P R135 6212110554P R136 6212110354P R301 6252100156P R302 6252100256P R304 6252470156P R305 6252100056P R307 6252100256P R308 6252470256P R309...
  • Page 57 RESISTORS FOR U.S.A. CKD_ID (LITE-ON Part No.) R344 6252100256P R345 6252240156P00 R346 6252470956P R347 6252470956P R348 6252240156P00 R349 6252100946P R350 6252250046P R351 6252240156P00 R356 6252240156P00 R357 6252240156P00 R358 6252240156P00 R359 6252470156P R360 6252470156P R362 6252100256P R363 6252240156P00 R364 6252100256P R365 6252100056P R366 6252100056P...
  • Page 58 TRANSISTOR FOR U.S.A. CKD_ID (LITE-ON Part No.) Q104 6426008505P Q105 6421000535P Q106 6423000225P Q107 6428000010P50 Q107 6444023100P Q108 6428000010P50 Q108 6444023100P Q301 6422000018P20 Q301 6422007318P Q301 6422007328P Q302 6422000018P20 Q302 6422007318P Q302 6422007328P Q303 6422000018P20 Q303 6422007318P Q303 6422007328P Q304 6422000018P20 Q304 6422007318P...
  • Page 59 7746402681P0A Q803N 7110430081P S601 6853001100P S601 6853001120P DESCRIPTION CD_MANUAL_ACER_T20ANUW_AL2002W_EMEA CARD_QSG_ACER_T20ANUW_AL2002W_EMEA CARD_APA WARRANTY_ACER_ALL MODELS_US CARD-CARD(TCO99 CARD)-ACER-ALL MODELS- DESCRIPTION ADHESIVE_RED GLUE_3609 um/m/℃ASTME831_8 L RC_#6800_ABS 94HB_ACER_T20BNUW COVER_HINGE_#6800_ABS 94HB_ACER_T20ANUW_ FC ASSY_#6790/#6810P_ABS 94HB_ACER_ SCREW_DOUBLE THREAD_WITH WASHER_PAN_M2 SCREW_DOUBLE THREAD_WITH WASHER_PAN_M2 FC_#6790/#6810P_ABS 94HB_ACER_T20ANUW_ PUSH BUTTON_FUNCTION KEY_#6790/6810P_ABS LENS_LED_TRANSPARENCE_PC_LITEON_T22BALW...
  • Page 60 PARTS & MISCELLANEOUS PARTS FOR U.S.A. CKD_ID (LITE-ON Part No.) S602 6853001100P S602 6853001120P S603 6853001100P S603 6853001120P S604 6853001100P S604 6853001120P S605 6853001100P S605 6853001120P TAP1 6876008600P V200 6814202010P24 X301 6449006400P DESCRIPTION SWITCH_TACT_SKHHAK2510_BLK 5mm SWITCH_TACT_100gf_BLK_DANG NAN SWITCH_TACT_SKHHAK2510_BLK 5mm SWITCH_TACT_100gf_BLK_DANG NAN SWITCH_TACT_SKHHAK2510_BLK 5mm SWITCH_TACT_100gf_BLK_DANG NAN SWITCH_TACT_SKHHAK2510_BLK 5mm...

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