Acer H235H Informacje Techniczne

1 Acer H235H Service Guide

20.211.213.816.5X221W8.12.520.211.213.816.5X222W8.12.522.71515.317.9X241W11.73.718.711.212.7X201W8.12.61618.711.212.7X202W8.12.61624.311.116.118.63.98

10 LCD Panel Specification of H235H LTM230HT01 is a color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT (Thin Film Tran

11 Optical Specifications

12

13Factory Preset Timing of H235H

14Monitor Block Diagram The LCD MONITOR will contain a main board, a power board, and a key board which house the flat panel control logic, brightnes

15Main Board Diagram Flash Memory EN25F20 (U402) Panel Interface (CN404) Crystal 12MHz (X401) Key control Interface (CN401) S

16Power Board Diagram DIMEMI filter Start Resistor (R904, R905) PWM Control (IC901) Transformer AC input 16V ON/OFF Feedback Circuit Transforme

17Software Flow Chart N Y 12NY5Y N 10Y N12Y N 7YN64389141113YN15YN16 1719Y N 18

18Remark: 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) I

2Service Guide Version and Revision Version Release Date Revision History Customer model TPV model HD9SA6MK8XAYDCA00 May.-13-2009 Initial Releas

19Main Board Layout

20Symbol Description Symbol Description U401 IC TSUMO58GDJ-LF-1 U601 IC PCM1754DBQR SSOP-16 U402 IC EN25F20-100GCP U603 IC PA6019A4 X401

21Installation To install the monitor on your host system, please follow the steps below: Steps 1 Connect the video cable a Make sure both the monito

22Attaching the Base 1 Attach the monitor stand arm to the base. 2 Ensure that the base is locked onto the monitor stand arm. SCREEN POSITION ADJUS

23Operating Instructions Press the power button to turn the monitor on or off. The other control

24

25How to Adjust a Setting

26

27How to Optimize The DOS-Mode Plug And Play Plug & Play DDC2B Feature This monitor is equipped with VESA DDC2B capabilities according to the VES

28Machine Disassembly This chapter contains step-by-step procedures on how to disassemble th

3Copyright Copyright © 2003 by Acer Incorporated. All rights reserved. No part of this publication may be reproduced, Transmitted, transcribed, store

29(2)Pry the monitor up then find out the hooks’ position, use the tool (like the picture or other card) to insert into the gap of bezel and rear cov

30 Turn over the monitor and take off the rear cover. (3)Remove the four screws remarked in red to remove the hinge,

31(4)Disconnected the connector remarked in green to remove the bezel. PS: be careful to Disconnect the Key board connector, because the keyboard con

32 5. Remove the five screws remarked in red. LVDS cable

336. Remove the five screws remarked in red and disconnected remarked in green to remove the main board and power board. Power board Main board

34 7.The panel

35Troubleshooting This chapter provides troubleshooting information for the H235H: 1. No P

362. No Picture (LED is orange) No picture The button if under control X401 oscillate waveform is normal Replace U401 Repl

373. Panel Power Circuit White screen Measure Q106 base is low level? X401 oscillate waveform is normal Check CN404 is solder and Q1

384. Key Board OSD is unstable or not working Is Key Pad Board connecting normally?Connect Key Board Is Button Switch normall

4Preface Before using this information and the product it supports, please read the following general information. 1. This Service Guide provides yo

395. Power Board 1) No power Check CN902 PIN3, 4 = 5VCheck AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rec

402.) No Backlight Check if the input voltage of inverter part is 16V NGOKCheck adapter part Check ON/OFF signal Check Interface board NGOKCheck I

41Connector Information D-sub connect and DVI connect: 15-Pin Color Display Signal Cable

42 19-pin color display signal cable

43FRU (Field Replaceable Unit) List This chapter gives you the FRU (Field Replaceable Unit) listing in global configura

44 Item Description TPV Part No. ACER Part NO. Q`ty 1 BEZEL A34G1361AGBA1B0130 60.LHF0B.003 1 2 POWER MYLAR Q05G6104 1 1 3 POWER BUTTO

45Part List Above picture show the description of the following component. Picture Description TPV Part No. ACER Part NO. Main_frame A15G0820

46 Main Board CBPCRA6ABQ4 55.LHF0B.001 Q37G0151011 BASE ASS'Y A34G1136AEM 1B0130 60.LHF0B.005 Rear cover A34G1362AEOA1M0100 60.LHF0B.0

47Schematic Diagram Main Board +5V_U SB+C105100uF/16VAdj_BA

48R457 470R 1/16W 5%U405M24C02-WMN6TP12345678A0A1A2VSSSDASCLWPVCCC4550.1uF 16VDAT0+R474 100R 1/16W 5%C4490.1uF 16VR462 100R 1/16W 5%R467 1K 1/16W 5%+

5Precautions z Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in a wet basement. z D

49VCC3.3R44810K 1/16W 5%VCC1.8R555NCR4504K7 1/16W 5%C438 0.1uF 16VLED_AKEY1on_BACKLIGHT 3R41810K 1/16W 5%+5V+5VKEY2PB6Q4042N3904S-RTK/PSVCC3.3FB4051

50LVB1PRXEC-LVA1PLVACKPVLCDLVB1MLVB2PRXE1+PB5R494220 OHM 1/4WRXE0+LVB0PLVA1PRXOC+LVBCKMPA9RXE2-C4640.1uF 16VPB2Panel_VCCPA5LVB3PPA8RXO2+RXE3-RXOC-+C4

51HDMI1_CK-D501BAT54C132HDMI_CP-5HDMI_SEL5Q5062N3904S-RTK/PSHDMI1_D1-HDMI_CP-1C5060.1uF 16VHDMI_CP-3HDMI1_D1+C5090.1uF 16VHDMI_HPD 5CLK+5HDMI_5V+5VG

52INRCN602CONN1234RR61918K 1/16W 5%+5V_AUDIORR60910K 1/16W 5%HINL+C60210uF/16VVOL 5C635 0. 47uF/ 16V+C638NC 220uF / 25VR6441K 1/16W 5%C641NCFB611120

53Power board +5VR946820OHM 2WD900FR107ZD902TZX18BL90127mH1423IC901LD75761234 5678CTCOMPCSGNDOUTVCCNCHVF901FUSE+C918470UF M 35VCN903CONN1234!+C90512

54R841 1M 1/10W 5%Q8022N7002 SOT-23C812NCD806BAV70312R808390R 1/10W 1%LV1XXXXR8445.1K 1/10W 5%ZD803RLZ5.6B1 2R8425.1K 1/ 10W 5%IC801 ta9687GN-A-0-TR1

6Table Of Contents Chapter 1 Monitor Features ………………………………………… 7 Introduction ……………………………………… 7 Electrical Requirements …………………………………

7Monitor Features Introduction Scope This short specification describes the electrical, o

8Electrical Requirements of H235H Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified.

9LCD Monitor General Specification See the image on next page.