Acer A231H Service Guide
Acer A231H Manual
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- Acer A231H | Service Guide - Page 1
Acer Acer -LCD-A231H Service Manual LCD Monitor Acer A231H - Acer A231H | Service Guide - Page 2
Important Safety Notice 02 01 Product Specification 03 02 Flat Panel Specification 15 03 Exploded Diagram 36 04 Troubleshooting ...37 05 Spare Parts List 42 06 Schematics and Layouts 43 07 Assembly and Disassembly 46 Appendix : User's manual Copyright Copyright 2010 InnoLux Tech. Corp - Acer A231H | Service Guide - Page 3
Important Safety Notice Acer -LCD-A231H 1. Safety precautions This monitor is manufactured and tested on a ground principle that a user's safety comes first. However, improper used or installation may cause damage to the monitor as well as to the user. Warning: z This monitor should be operated - Acer A231H | Service Guide - Page 4
: 01 Product Specification Acer -LCD-A231H Acer A231H is designed with LVDS interface and VGA/DVI-D/HDMI(option) input, monitor. The monitors shall automatically to display lower resolution video modes into 1920x1080 full screen display. The image can be adjusted through OSD control. It support - Acer A231H | Service Guide - Page 5
Items Description Option VGA cable 1.8m µ DVI cable 1.8m µ Acer -LCD-A231H Audio cable 1.8m µ User's manual Multi µ Warranty card Multi µ Quick-start Guide Multi µ 2. Operation Specifications The unit should suffer no visible cosmetic damage and should operate with no degradation - Acer A231H | Service Guide - Page 6
and Compatibility Requirements EMC Safety Acer -LCD-A231H EMC&Safety Ergonomics Compatibility Power Management Windows 95/98/Me/2000/XP/VISTA/7 Energy Star 5.0 2.3 Electrostatic Discharge Requirements Item Condition Spec Contact discharge: 4KV Electrostatic IEC61000 - Acer A231H | Service Guide - Page 7
Main Power Supply 3.1.1 Input characteristics Acer -LCD-A231H Items Condition Spec Note AC Input Voltage range Universal input 25v loading:0.1A~1.5A 5V loading: 0A - Acer A231H | Service Guide - Page 8
(ACM On) CCFL operating Voltage Acer -LCD-A231H V-sync on on off off -- Video active blanked blanked blanked -- Power ≤55W < 1W < 1W < 1W < 1W LED Blue Amber Amber Amber Off Specification 4 CCFL 23.8---28V 1.2A (Typ.), 1.4A ≥75% Note: Other panels please refer to the reference panel specs. - Acer A231H | Service Guide - Page 9
Acer Acer -LCD-A231H 3.3 Brightness output The test to verify specifications in this section shall be performed under the following standard conditions unless otherwise noted. Temperature Test pattern Video Resolution Video input level Warm-up time : 25 ± 5°C : white : 1920 x 1080 : 700 mV ± 2% - Acer A231H | Service Guide - Page 10
3.5 Brightness uniformity The test standard conditions refer to Sec 3.3. Acer -LCD-A231H Min. luminance Max. luminance of of nine nine points points (backlight) (backlight) ‡75% 4. Input / Output Signal Specifications 4.1 AC in 4.1.1 AC Input Voltage: 100~240VAC 4.1.2 AC Input Current: 1.2A - Acer A231H | Service Guide - Page 11
shield 9 TMDS Data010 TMDS Clock+ 4.4 DVI-D in DVI-D Connector Pin assignment: Acer -LCD-A231H 16 SDA 17 DDC/CEC Ground 18 +5V Power 19 Hot Plug Detect Pin Symbol Data 0+ 19 TMDS Data 0/5 shield 20 N/C 21 N/C 22 Clock shield 23 Clock + 24 Clock - Pin Symbol 1 Red Video 2 Green Video - Acer A231H | Service Guide - Page 12
Acer 9 PC +3.3/+5V 10 Sync. Ground 11 N/C 12 DDC SDA 13 H sync 14 V sync 15 DDC SCL Acer -LCD-A231H - Acer A231H | Service Guide - Page 13
SPEC: Acer -LCD-A231H Items Condition Specification Analog RGB signal Sync H-Sync Frequency V-Sync Frequency Input impedance =75 Ohm Input impedance Ú1k Ohm 0.7Vp-p TTL level, Separate H/V-sync(+/-) 31K~83KHz 56~76Hz 4.6 Timing table Mode Resolution (active dot) Resolution Horizontal - Acer A231H | Service Guide - Page 14
Acer 4.7 HDMI timing table(For HDMI Module) For DVD Player Input, Attached timing is supported : Mode VGA NTSC (480i) 4:3 NTSC (480i) 16:9 NTSC (480p) 4:3 NTSC (480p) 16:9 PAL (576i) PAL (576p) 4:3 PAL (576p) 16:9 720p 720p 1080i 1080i 1080P 1080P Resolution 640 x 480p 720 x 480 720 x 480 720 x - Acer A231H | Service Guide - Page 15
Acer Acer -LCD-A231H 4.8 Audio output SPEC(For Audio Module) Items Specification Min TYP MAX TEST CONDITIONS Output power (W) 1.2 1.5 1.8 THD+N = 10%pAT 1KHz 1Vrms Output impedance (Ω) 3.4 4 4.6 AT 1KHz 1Vrms Total harmonic distortion plus noise --- --- 10% PoÙ 2.0W - Acer A231H | Service Guide - Page 16
Acer 4.9.1 VGA EDID table Acer -LCD-A231H 0 1 2 3 4 5 6 7 8 9 ABCDE F 0 00 FF FF FF FF FF FF 00 04 72 C9 00 45 23 01 01 1 0A 14 01 03 08 33 20 00 00 00 FF 7 00 30 30 30 30 30 30 30 30 30 30 30 30 0A 00 00 4.9.3 HDMI EDID table(For HDMI Module) 0 1 2 3 4 5 6 7 8 9 ABCDE F 0 00 FF FF FF FF FF FF - Acer A231H | Service Guide - Page 17
Acer Acer -LCD-A231H 5 25 00 13 2A 21 00 00 9E 01 1D 00 BC 52 D0 1E 20 6 B8 28 55 40 13 2A 21 00 00 1E 01 1D 80 D0 72 1C 7 16 20 10 2C 25 80 13 2A 21 00 00 9E 00 00 00 FF - Acer A231H | Service Guide - Page 18
Acer Acer -LCD-A231H 5. Function Specifications All the tests to verify specifications the specified modes 5.1 Panel general specifications Item Supplier Model name Display TYP.) 160 (Horizontal) / 160(Vertical) (CRÚ10) Normally White 5ms (TYP. ON/OFF) Anti-Glare, 3H 4 CCFLs 534.0(W) ×311.7(H) × - Acer A231H | Service Guide - Page 19
Acer Acer -LCD-A231H 5.2 Optical characteristic of LCD panel The test methods for the below items' definition, please refer to the specification of INL MT230DW01 panel. Item Viewing Angle (CR >= 10) Contrast ratio Response time Color Chromaticity (CIE) Color Coordinates (CIE) White on screen, - Acer A231H | Service Guide - Page 20
POWER] Power on or power off the monitor Acer -LCD-A231H 5.3.2 Hot Key Operation HOT KEY OPERATION FUNCTION e Color AUTO MENU ◄ ► POWER DESCRIPTION FACTORY MODE ● Press [e], and then press [POWER] ON for DC power on. OSD - Acer A231H | Service Guide - Page 21
Acer -LCD-A231H The On-Screen Display (OSD) shall be an easy to use icon based menu through keypad OSD buttons or remote control unit. The unit shall leave the factory with all OSD controls set Standard User mode 77 Text mode 44 Standard mode 77 Graphics mode 97 Movie mode 77 50 User mode - Acer A231H | Service Guide - Page 22
Acer Language Reset Resolution Digital --- HDMI --- EMEA NO-EMEA --- English English --- Russian Deutsch Deutsch --- Français Français --- Español Español --- Italiano Italiano --- Dutch Finnish ˚͉Ⴇ --- --- --- --- --- Acer -LCD-A231H -- --- - Acer A231H | Service Guide - Page 23
Acer -LCD-A231H Main menu (NO_EMEA) English (ߵ语) Picture Brightness Contrast H.Position V.Position Focus Clock Colour Temp Warm Cool User de l'OSD T. de espera OSD Intervallo OSD OSD 显ͪ时 OSD 䞯䕧֛ ண֛ Setting Wide Mode Full Aspect Input Language Reset Please Wait Information Exit Enter Move - Acer A231H | Service Guide - Page 24
ais Español Italiano Acer -LCD-A231H Auto Config Please Wait Cable Not Connected Input Not Supported Іਗሜ Autom. Abgl Bitte OSD (scenario OSD) language: (NON_EMEA) English (ߵ语) Standard Text Graphics Movie User Adjust/Exit Select ᐿʕ˖ Deutsch (ᅃ语) ᅺ Standard ˖ο Text Français Espa - Acer A231H | Service Guide - Page 25
Blu Autoregolazione Acer -LCD-A231H Blauw Sininen Autom.conf Autom. iguratie asetukset OSD Timeout OSD-Dauer Setting Wide Mode Kaapeli ei kiinni Input Not Supported No Signal Frequenzen nicht ется unterstützt Kein signal Fréquences non supportées Frequencias no soportadas - Acer A231H | Service Guide - Page 26
panel, the Monitor weight =2.45Kg+second panel weight ±0.3Kg 6.2 Cabinet Material Cabinet Material Cabinet Plastic Material Front Bezel Back Cover Base Cabinet Texture ABS HB BLACK BLACK BLACK ACER SPECIFICATION Spec 6.3 Mechanical Specification Mechanical Bezel Gap Specification Screen printed - Acer A231H | Service Guide - Page 27
Acer Acer -LCD-A231H 7. Package 7.1 Unit Package Specification 7.1.1 Units package Items Spec Packaging Ink Length Height Width Gross Weight Units per Pallet 40' /20' Container Loading, Palletized Refer to ME PACKING SPEC as it normally sits in front of user, i.e., Front-to-back, side-to- - Acer A231H | Service Guide - Page 28
7.1.3 Non operation Thermal Shock Test Item Temperature Reset cycles times Total cycles Acer -LCD-A231H Description -200C to 600C 25ºC>60ºC (10hrs)>25ºC (2hrs)>-20ºC (10hrs)>25ºC 3cycles ,every transition time 0.5 hr, 3 cycles 7.1.4 Package Drop Drop height (Select drop height - Acer A231H | Service Guide - Page 29
Acer Acer -LCD-A231H 02. Flat Panel Specification - Acer A231H | Service Guide - Page 30
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3.1. Screw List 03 Exploded Diagram Acer -LCD-A231H Item Part No. Description 1 509146306200R SCREW,P,CROSS,W/WAS,M3*6,Zn-Cc Fixed Qty T(kg*cm) Remark I/F Board to Chassis*1 Power Board to Chassis*4 D-SUB CON*2 DVI CON*2 Hinge to Stand Hinge to back-cover 3.2. LCD Exploded drawing (All) - Acer A231H | Service Guide - Page 70
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Acer Acer -LCD-A231H 04 Troubleshooting 1ēNo Power & Power LED Off No power Check primary rectifier voltage Check circuit if short Check IC802, C804, T801, Check pin6 of IC802 voltage about - Acer A231H | Service Guide - Page 73
2ēDC output voltage is unstable Unstable power Acer -LCD-A231H Check sampling Circuit Check the R pin voltage of IC803 Check R822,R825,R826, Check the C pin voltage of IC803 R822,R825,R826, Change Check pin6 - Acer A231H | Service Guide - Page 74
on No raster? Yes LED Green? Yes Backlight can't be turned on. Yes Is there 5Vdc voltage on pin2 of IC501? No Check power supply Acer -LCD-A231H Yes Is there high-level voltage on No Yes Is Ok R505? pin6 of IC501? Check I/F board Yes Are connected rightly CN501, CN502, CN503 and - Acer A231H | Service Guide - Page 75
Acer 4. Black screen Acer -LCD-P236H - Acer A231H | Service Guide - Page 76
Acer 5. White Screen Acer -LCD-P236H - Acer A231H | Service Guide - Page 77
Acer 6. Bad Screen Acer -LCD-P236H - Acer A231H | Service Guide - Page 78
Spare parts List PARTNAME ACER PART NO. OEM PART NO DESCRIPTION Acer -LCD-A231H 8231EY81A120R CN MAIN BOARD 003 453030300370R CABLE,DVI-D 18+1P MALE 6FT BLACK , ROHS STAND 60.LNX0J.001 71401E23EY00R ASSY STAND LE23EY CHASSIS 60.LNW0J.004 70108E23ER03R ASSY,CHASSIS,W DVI SPK,SEC,LE23ER - Acer A231H | Service Guide - Page 79
Acer Acer -LCD-A231H COVER 60.LNX0J.003 71405E23EY00R ASSY BACK COVER SEC 1A1D LE23EY BASE 60.LNX0J.004 71402E23EY00R ASSY BASE LE23EY STAND UP 42.LNX0J.001 50126E23EY00R STAND UP LE23EY SPEAKER 23.LK60J.001 618100103150R SPEAKER 1.5W 4Ω 100&120mm R/B/G W/CASE PANEL LK.23006.014 - Acer A231H | Service Guide - Page 80
Acer 6.1 IF BD Layout Acer -LCD-A231H 06 Schematics and Layouts - Acer A231H | Service Guide - Page 81
Acer 6.2 Power BD Layout Acer -LCD-A231H - Acer A231H | Service Guide - Page 82
Acer Acer -LCD-A231H 6.3 Keypad BD Layout - Acer A231H | Service Guide - Page 83
Acer Acer -LCD-A231H 6.4 IF BOARD schematics and Power Supply circuit - Acer A231H | Service Guide - Page 84
RXO0RXO0+ RXO1RXO1+ RXO2RXO2+ RXOCRXOC+ RXO3RXO3+ GND CN105 FFC-CON/NC 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 + RXE3RXE3+ 0/NC 0/NC 0/NC LPIN6 LPIN5 0/NC R0603 CN103 FFC-CON 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 - Acer A231H | Service Guide - Page 85
C826 NC C803 0.47/275V CON8PIN B 4 1 R820 NC R821 1K 1% 3 2 C821 B 0.1/100V CN802 RT801 NTC 5R F801 3.15A/250V TO SCALER BD CN801 CN801 1 2 C842 0.1/50V USB 5V 6 IC804 NC R833 LTV817M 1K 1% C 4 1 PSC 6 R 3 2 A IC803 TLV431ALP R823 NC R824 3K3 1% 1 2 3 4 100mm 4PR - Acer A231H | Service Guide - Page 86
5 4 R849 D NC R850 NC R808 33K C810 0.1/50V R806 33K R851 NC C R803 R804 NC NC 8 HV OUT 5 R813 20 VCC 6 7 NC IC802 LD7575 CS 3 1 RT COMP 2 R809 680R 4 GND C812 B NC R807 C809 100K 1% C811 220p/50V 1000p/50V R844 NC C838 NC D812 NC A 5 4 3 2 1 D CN804 1 - Acer A231H | Service Guide - Page 87
5 4 3 2 1 +24V C509 2.2u C527 D501 R501 NC C508 C532 5.6V 5.1k 2.2u 3 D 1000P 0805 1 U502 C507 0 AP9575GH 2.2u 22 C512 47n C506 2.2u DRIV R526 1 U501 AP9971GH 3 R512 100k D502 CN506 10R 0 R502 VDDA IC501 VCC5V 10R C502 1 DRV1 DRV2 16 1u 0805 2 VDDA GND 15 - Acer A231H | Service Guide - Page 88
5 4 3 D CN505 C NC NC +25V +25V GND GND DRIV DRIV Vs2 Is1 Op1 VS1 GND VS3 Op2 Is2 VS4 +5V on/off Briness 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 VS2 IS1 OP1 VS1 VS3 OP2 IS2 VS4 0 VCC5V ON/OFF Briness CON 20PIN +25V + C501 270u/50V 0 FB802 B 0 T501 SPW-169 1 2 5 C528 - Acer A231H | Service Guide - Page 89
8 5 VOL EO_L 6 2 VOLUME R711 100 2 2QN47400121 Audio VCC5V 3 3 AGND 1 +5V Hp/Sp 4 GND 2 1 CN702 + 2*8P 2.54mm 90° TO Daughter BD C707 220u/25V A 5 4 3 B InnoLux P236H Document Number : SIZE : APPRO BY : Custom TITLE : A Audio Switch CHECK BY : DATE : SHEET 6 2 2010 - Acer A231H | Service Guide - Page 90
Acer Acer -LCD-A231H 07 Assembly and disassembly S1 Release the base from stand. S2 Release the stand cover. S3 Screw out the 3 screws in stand. - Acer A231H | Service Guide - Page 91
Acer S4 Take off the stand. Acer -LCD-A231H S5 Release the front bezel at 3 sides S6 Turn over the monitor, release the back-cover. - Acer A231H | Service Guide - Page 92
Acer Acer -LCD-A231H S7 Release the keypad cable and release the keypad board. S8 Pull out lamp cables and LVDS cable. S9 Release the chassis. - Acer A231H | Service Guide - Page 93
Acer S10 Screw out the 4 bolt screws Acer -LCD-A231H S11 Release the 6 screws from interface board and power board. S12 Release the speaker cable. - Acer A231H | Service Guide - Page 94
Acer S13 Take out interface board and power board. Acer -LCD-A231H S14 Take out LCD panel. - Acer A231H | Service Guide - Page 95
Acer Acer -LCD-A231H 08 FW & EDID upgrade procedure 1. SOP of PCBA ISP Programming (FW TOOL: INL PN 799999942100R/Acer PN 6K.L46VF.001) 1.1 Operational condition: Equipment: " button; The ISP tool will connect to monitor automatically, and it will show flash IC type automatically '8*$ .PEFM - Acer A231H | Service Guide - Page 96
Acer Acer -LCD-A231H Secondlypdownload FW software: first select "READ", and then load FW software in Rooter (Fig.2). Software Checksum value FW BIN file Thirdly, select "AUTO", and keep - Acer A231H | Service Guide - Page 97
Acer Acer -LCD-A231H in "I2C Speed Setting"and check Communication Setting. If connect port is print port, please check port type. - Acer A231H | Service Guide - Page 98
Acer 3. Flow Chart Acer -LCD-A231H 2. SOP of EDID (EDID TOOL: INL PN 799999942000R/ Acer PN 6K.LBQ0J.001) 2.1 Request of hardware and software: 1. Software a.port95nt.exe - Acer A231H | Service Guide - Page 99
Acer b.Edid.exe c.A231H model 2. Hardware a. PC€winXP or win20001PCSi b. Tool€EDID CardeVGA cable & DVI cable) 2.2 Operational steps: 1. First set up Port95nt.exe Acer -LCD-A231H - Acer A231H | Service Guide - Page 100
Acer 2. Click next button continually then can finish setting. Acer -LCD-A231H A : USB interface provide +5V DC power€No Power is ok B : Connect DDC Card and PC with collateral interface i C :VGAeDVI use different cable to link DDC and PC - Acer A231H | Service Guide - Page 101
EDID ISP Card: C A Acer -LCD-A231H B AjCollateral printing interface (connect with PC) B : VGA interface (one VGA connect with PC to provide signal for monitor the other one connect with PC VGA interface to write VGA EDID, Write EDID can without providing signal) C : DVI interface (connect with - Acer A231H | Service Guide - Page 102
Acer A231H Acer -LCD-A231H - Acer A231H | Service Guide - Page 103
Acer 3.2 Cloose the Model in main menu, and the password is 1234. Acer -LCD-A231H A231H - Acer A231H | Service Guide - Page 104
Acer 3.3 Choose the model, A231H_A(Update VGA) ,A231H_D(Update DVI) . Acer -LCD-A231H A231H A231H_D A231H_A - Acer A231H | Service Guide - Page 105
Acer Acer -LCD-A231H 3.4 Input S/N in the Blank , eg:ETLA10C109805111D94023dthe program can write directly. A231H - Acer A231H | Service Guide - Page 106
Acer 3.5 After the process is ok , the program can check that automatically Acer -LCD-A231H A231H - Acer A231H | Service Guide - Page 107
Acer 3.6 If write successfully , you can see PASS in the right Acer -LCD-A231H A231H A231H