Acer A231H Service Manual
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Acer A231H Service Manual

Acer A231H Service Manual

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Acer
Acer –LCD-A231H

Service Manual

LCD Monitor Acer A231H

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Summary of Contents for Acer A231H

  • Page 1: Service Manual

    Acer Acer –LCD-A231H Service Manual LCD Monitor Acer A231H...

  • Page 2: Table Of Contents

    Copyright 2010 InnoLux Tech. Corp. Ltd All Rights Reserved This manual may not, in whole or in part, be copied, Photocopied, reproduced, translated, or converted to any electronic or machine readable form without prior written permission of InnoLux Tech. Corp. Ltd. Acer A231H Service Manual...

  • Page 3: Important Safety Notice

    Acer Acer –LCD-A231H Important Safety Notice 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.

  • Page 4: Product Specification

    01 Product Specification General: Acer A231H is designed with LVDS interface and VGA/DVI-D/HDMI(option) input, it featured with embedded universal AC power supplies and audio input. It’s a green product and meets all ROHS standard. The power button and display control buttons are on the front of the monitor. The monitors shall automatically to display lower resolution video modes into 1920x1080 full screen display.

  • Page 5: Environmental Conditions

    Acer Acer –LCD-A231H 1.2 Accessories Audio User’s Quick-start Items Warranty card cable cable cable manual Guide Description 1.8m 1.8m 1.8m Multi Multi Multi O pt io n Operation Specifications The unit should suffer no visible cosmetic damage and should operate with no degradation in display quality during exposure to the operating conditions and after exposure to the non-operating conditions, in any sequence.
  • Page 6 Acer Acer –LCD-A231H 2.2 Safety, EMC, Ergonomics and Compatibility Requirements Safety EMC&Safety Ergonomics Windows 95/98/Me/2000/XP/VISTA/7 Compatibility Energy Star 5.0 Power Management 2.3 Electrostatic Discharge Requirements Item Condition Spec Contact discharge: 4KV Electrostatic Contact discharge: 8KV ● IEC61000-4-2(EN55024) Discharge Air discharge...
  • Page 7 Acer Acer –LCD-A231H Electrical and Optical Characteristics and Performance 3.1 Main Power Supply 3.1.1 Input characteristics Items Condition Spec Note AC Input Voltage range Universal input full range 90~264Vac AC Input Voltage rating Universal input full range 100~240Vac AC input frequency range...
  • Page 8 Acer Acer –LCD-A231H OTP(Over temperature protection) Fuse protection Table-1 Status H-sync V-sync Video Power Power On active ≤55W Blue blanked < 1W Amber Power Saving blanked < 1W Amber blanked < 1W Amber Power Off < 1W 3.2 Backlight Power Supply...
  • 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 : 25 ± 5°C Test pattern : white Video Resolution : 1920 x 1080 Video input level : 700 mV ±...
  • Page 10 Acer Acer –LCD-A231H 3.5 Brightness uniformity The test standard conditions refer to Sec 3.3. Min. luminance nine points (backlight Max. luminance nine points (backlight Input / Output Signal Specifications 4.1 AC in AC Input Voltage: 100~240VAC 4.1.1 AC Input Current: 1.2A @100Vac, 0.6A @240Vac 4.1.2...
  • Page 11 Acer Acer –LCD-A231H TMDS Data1- TMDS Data0+ DDC/CEC Ground TMDS Data0 shield +5V Power TMDS Data0- Hot Plug Detect TMDS Clock+ 4.4 DVI-D in DVI-D Connector Pin assignment: Symbol Symbol TMDS Data 2- Hot Plug Detect TMDS Data 2+ TMDS Data 0-...
  • Page 12 Acer Acer –LCD-A231H PC +3.3/+5V Sync. Ground DDC SDA H sync V sync DDC SCL...

  • Page 13: Timing Table

    Acer Acer –LCD-A231H Signal SPEC: 4.5.2 Items Condition Specification Analog RGB signal Input impedance =75 Ohm 0.7Vp-p Sync Input impedance 1k Ohm TTL level, Separate H/V-sync(+/-) H-Sync Frequency 31K~83KHz V-Sync Frequency 56~76Hz 4.6 Timing table Resolution Resolution Horizontal Vertical Nominal Pixel...
  • Page 14 Acer Acer –LCD-A231H 4.7 HDMI timing table(For HDMI Module) For DVD Player Input, Attached timing is supported : Mode Resolution Pixel Clock MHz H sync KHz V sync Hz 640 x 480p 25.2 31.5 NTSC (480i) 4:3 720 x 480 13.50...
  • Page 15 Acer Acer –LCD-A231H 4.8 Audio output SPEC(For Audio Module) Specification Items TEST CONDITIONS THD+N = 10% AT 1KHz 1Vrms Output power (W) Output impedance (Ω) AT 1KHz 1Vrms 2.0W Total harmonic distortion plus noise THD+N Signal to noise ratio (dB) PWM frequency (KHz) Note: The low pass RC Filter (R=100Ω...
  • Page 16 Acer Acer –LCD-A231H VGA EDID table 4.9.1 FF FF FF FF FF FF 00 72 C9 00 45 33 1D 78 EA 60 85 A6 56 4A 9C 25 54 B3 0C 10 71 4F 81 81 80 95 00 D1 C0...
  • Page 17 Acer Acer –LCD-A231H 13 2A 21 00 9E 01 1D 00 BC 52 D0 1E 20 13 2A 21 00 1E 01 1D 80 D0 72 1C 10 2C 25 13 2A 21 00 9E 00 00 FF...
  • Page 18 Acer Acer –LCD-A231H Function Specifications All the tests to verify specifications in this section shall be performed under the following standard conditions unless otherwise noted. The standard conditions are: Temperature : 25 ± 5°C Warm-up time : 30 minutes minimum...
  • 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 panel. MT230DW01 Item Unit Conditions Min. Typ. Max. Remark Right [degree] Horizontal Left Viewing Angle CR >= 10...
  • Page 20 Acer Acer –LCD-A231H [POWER] Power on or power off the monitor Hot Key Operation 5.3.2 HOT KEY OPERATION FUNCTION DESCRIPTION e Color AUTO MENU ◄ ► POWER Press [e], and then press [POWER] FACTORY for DC power on. OSD menu will be ●...

  • Page 21: Osd Structure

    Acer Acer –LCD-A231H 5.4 OSD Structure 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 to their default values.
  • Page 22 Acer Acer –LCD-A231H Digital HDMI EMEA NO-EMEA English English Russian Deutsch Deutsch Language Français Français English Español Español Italiano Italiano Dutch 简 Finnish Reset Resolution H.Freq Info V.Freq Input Type Notes: 1 Clock default 50 is for Visa timing. Others depend on timing.
  • Page 23 Acer Acer –LCD-A231H 5.5 OSD Translation Main menu (NO_EMEA) English Deutsch Français Español Italiano 简 ( 语) ( 语) ( 语) 语) 利语) Picture Bild Image Imagen Immagine Brightness Helligkeit Luminosité Brillo Luminosità 亮度 度 度 Contrast Kontrast Contraste Contraste Contrasto 对...
  • Page 24 Acer Acer –LCD-A231H English Deutsch Français Español Italiano 简 ( 语) ( 语) ( 语) 语) 利语) Autoréglage Autoajuste Auto Config Autom. Abgl. Autoregolazione 调 Veuillez Espere, Please Wait Bitte warten Attendere prego 请 patienter porfavor Cable Not Leitung nicht Câble non...
  • Page 25 Acer Acer –LCD-A231H Blue Синий Blau Bleu Azul Blauw Sininen Автонастро Autom.conf Autom. Auto Config Autom. Abgl. Autoréglage Autoajuste Autoregolazione йка iguratie asetukset Вр. отобр. T. de espera Time-out OSD Timeout OSD-Dauer Délai de l'OSD Intervallo OSD Aikakatkaisu Меню Setting Настр.
  • Page 26 Acer Acer –LCD-A231H Изображен Graphics Grafiken Images Gráficos Grafica Grafische Grafiikka ие Movie Кино Spielfilm Film Película Film Film Elokuva Пользовате User Benutzer Utilisateur Usuario Utente Gebruiker Käyttäjä ль Настроить Abstimmen/Be Aanpassen/v Adjust/Exit Ajuster/Quitter Ajuste/salir Regola/Esci Säädä/Lopeta /Выход enden erlaten...
  • Page 27 Acer Acer –LCD-A231H 7. Package 7.1 Unit Package Specification 7.1.1 Units package Items Spec Packaging Refer to ME PACKING SPEC COLOR Length 620+/-2.0mm Height 483+/-2.0mm Width 146+/-2.0mm Gross Weight 7.7±0.5kg for INL panel (INL panel weight 3.05Kg) Units per Pallet 59sets/pallet 40’...
  • Page 28 Acer Acer –LCD-A231H Test 7.1.3 Non operation Thermal Shock Item Description Temperature C to 60 >60 (10hrs)>25 (2hrs)>-20 (10hrs)>25 ºC ºC ºC ºC ºC Reset cycles times every transition time 0.5 hr, 3cycles , Total cycles 3 cycles 7.1.4 Package Drop...

  • Page 29: Flat Panel Specification

    Acer Acer –LCD-A231H 02. Flat Panel Specification...

  • Page 69: Exploded Diagram

    Acer Acer –LCD-A231H 03 Exploded Diagram 3.1. Screw List Fixed Item Part No. Description Remark T(kg*cm) I/F Board to Chassis*1 509146306200R SCREW,P,CROSS,W/WAS,M3*6,Zn-Cc 6.5 0.5 Power Board to Chassis*4 D-SUB CON*2 509000000700R BOLT,#4-40x11.8,Ni ROHS 3.75 0.25 DVI CON*2 509212608120R SCREW,F,CROSS,T4*8,Zn,ROHS(5.8~6.2) Hinge to Stand 10 0.5...

  • Page 72: Troubleshooting

    Acer Acer –LCD-A231H 04 Troubleshooting 1 No Power & Power LED Off No power Check circuit if Check primary rectifier Check IC802, voltage short C804, T801, Check F801, P801, RT801,D801 Check pin6 of IC802 CheckC810,D803,C807, voltage about 16V Check pin2 of IC802 voltage...
  • Page 73 Acer Acer –LCD-A231H 2 DC output voltage is unstable Unstable power Check Check sampling R822,R825,R826, Circuit R822,R825,R826, Check the C pin Check the R pin Change voltage of IC803 voltage of IC803 Check R832 Check pin6 of Check D803,C807,C810 IC802 voltage...
  • Page 74 Acer Acer –LCD-A231H 3 Backlight can’t be turned on No raster? LED Green? Backlight can’t be turned on. Is there 5Vdc voltage Check power on pin2 of IC501? supply Is there high-level voltage on Check I/F board Is Ok R505?
  • Page 75 Acer Acer –LCD-P236H 4. Black screen...
  • Page 76 Acer Acer –LCD-P236H 5. White Screen...
  • Page 77 Acer Acer –LCD-P236H 6. Bad Screen...

  • Page 78: Spare Parts List

    Acer Acer –LCD-A231H 05 Spare parts List 8231EY81A120R ACER PART PARTNAME OEM PART NO DESCRIPTION MAIN 55.LNW0J.001 795611300800R PCBA,IF/B(A09,EMEA,W/SPK),LE23ER-812 ROH BOARD POWER 55.LNW0J.002 795611400800R PCBA,PI/B,W/SPK,LE23ER-812 ROHS BOARD KEYPAD 55.LNX0J.001 795691500800R PCBA,KEYPAD/B,LE23EY-812 ROHS BOARD LVDS 50.LK60J.002 430303003160R HRN LVDS FFC 30P 220mm W/CORE TASTE...
  • 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 631102230260HA LCP 23"LTM230HT01-A09(A)(SAMSUNG)HF...

  • Page 80: Schematics And Layouts

    Acer Acer –LCD-A231H 06 Schematics and Layouts 6.1 IF BD Layout...
  • Page 81 Acer Acer –LCD-A231H 6.2 Power BD Layout...
  • Page 82 Acer Acer –LCD-A231H 6.3 Keypad BD Layout...
  • Page 83 Acer Acer –LCD-A231H 6.4 IF BOARD schematics and Power Supply circuit...
  • Page 84 VDDP_33 +3.3V AVDD_33 FB102 60　 C150 22u/16V +3.3V VCC5V VDDP_33 AVDD_33 VDDC_18 AVDD_18 VDDC_18 AVDD_18 +1.8V FB105 U105 60　 C142 C166 0.1/16V/NC 22u/16V C143 C144 C145 C146 C147 RED+ RIN0P VCC5V_DET 0.1/16V 0.1/16V 0.1/16V 0.1/16V 0.1/16V R182 20K/NC RED- RIN0M GPIO_P17/SAR0 R154 GREEN+...
  • Page 85 R827 0 R827 0 C815 C815 C805 C805 330p/500V 330p/500V +24V 3,4 2200p/400V 2200p/400V T801 T801 D804 D804 R831 R831 SPW-101 SPW-101 SF50-04F69-LF SF50-04F69-LF ZD801 ZD801 510 2W 510 2W D805 D805 SF50-04F69-LF SF50-04F69-LF Q801 Q801 D806 D806 2N4401 2N4401 SF50-04F69-LF SF50-04F69-LF C839...
  • Page 86 R849 R849 R850 R850 R808 R808 CN804 CN804 C810 C810 Gate 0.1/50V 0.1/50V R806 R806 Isense R851 R851 R803 R803 R804 R804 R813 R813 IC802 IC802 LD7575 LD7575 R809 R809 680R 680R COMP CON8PIN CON8PIN C812 C812 C809 C809 R807 R807 220p/50V 220p/50V...
  • Page 87 C509 C509 +24V 2.2u 2.2u C527 C527 D501 D501 R501 R501 C508 C508 C532 C532 5.6V 5.6V 5.1k 5.1k 2.2u 2.2u 1000P 0805 1000P 0805 U502 U502 C507 C507 AP9575GH AP9575GH 2.2u 2.2u DRIV C512 C512 C506 C506 2.2u 2.2u U501 U501 R512 100k...

  • Page 88: Inverter Supply

    T501 T501 SPW-169 SPW-169 C528 NC C528 NC C513 C513 CN501 CN501 12p/3KV 12p/3KV 4100-D02 4100-D02 CN505 CN505 +25V +25V T502 T502 +25V SPW-169 SPW-169 DRIV DRIV C529 C529 C514 C514 CN502 CN502 12p/3KV 12p/3KV 4100-D02 4100-D02 T503 T503 C501 C501 SPW-169 SPW-169...
  • Page 89 Audio VCC5V P701 P701 C708 C708 C709 C709 1000p/50V 1000p/50V 1000p/50V 1000p/50V PHONE_JACK PHONE_JACK U702 U702 C703 0.1/50V C703 0.1/50V A IN/OUT A OUT/IN C704 0.1/50V C704 0.1/50V B IN/OUT B OUT/IN C705 0.1/50V C705 0.1/50V HDMI_AUDIO_R C IN/OUT C OUT/IN C706 0.1/50V C706 0.1/50V HDMI_AUDIO_L...

  • Page 90: Assembly And Disassembly

    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.
  • Page 91 Acer Acer –LCD-A231H S4 Take off the stand. S5 Release the front bezel at 3 sides S6 Turn over the monitor, release the back-cover.
  • 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.
  • Page 93 Acer Acer –LCD-A231H S10 Screw out the 4 bolt screws S11 Release the 6 screws from interface board and power board. S12 Release the speaker cable.
  • Page 94 Acer Acer –LCD-A231H S13 Take out interface board and power board. S14 Take out LCD panel.
  • 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: PC, ISP card, signal cable and power cable. ESD requirements: antistatic wrists, antistatic gloves(fingers), and connecting cable Name of ISP program: ISP_Tool_V4.4.2.4...
  • Page 96 Acer Acer –LCD-A231H Secondly download 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 its default value. Click “RUN” for beginning programming. There will be prompting if programming is OK.
  • Page 97 Acer Acer –LCD-A231H in “I2C Speed Setting”and check Communication Setting. If connect port is print port, please check port type.
  • Page 98 Acer Acer –LCD-A231H 3. Flow Chart 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...
  • Page 99 Acer Acer –LCD-A231H b.Edid.exe c.A231H model 2. Hardware a. PC winXP or win2000 1PCS b. Tool EDID Card VGA cable & DVI cable) 2.2 Operational steps: 1. First set up Port95nt.exe...
  • Page 100 Acer Acer –LCD-A231H 2. Click next button continually then can finish setting. A : USB interface provide +5V DC power No Power is ok B : Connect DDC Card and PC with collateral interface C :VGA DVI use different cable to link DDC and PC...
  • Page 101 Acer Acer –LCD-A231H EDID ISP Card: A Collateral 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 Monitor) 3.
  • Page 102 Acer Acer –LCD-A231H A231H...
  • Page 103 Acer Acer –LCD-A231H 3.2 Cloose the Model in main menu, and the password is 1234. A231H...
  • Page 104 Acer Acer –LCD-A231H 3.3 Choose the model, A231H_A(Update VGA) ,A231H_D(Update DVI) . A231H A231H_D A231H_A...
  • Page 105 Acer Acer –LCD-A231H 3.4 Input S/N in the Blank , eg:ETLA10C109805111D94023 the program can write directly. A231H...
  • Page 106 Acer Acer –LCD-A231H 3.5 After the process is ok , the program can check that automatically A231H...
  • Page 107 Acer Acer –LCD-A231H 3.6 If write successfully , you can see PASS in the right A231H A231H...

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