Page 2 - Service Guide Version and Revision; Version; Release
2 Service Guide Version and Revision Version Release Date Revision History Customer model TPV model HD9SA6MK8XAYDC A00 May.-13-2009 Initial Release H235H HD9GA6MK8XABDC
Page 4 - Preface; Reorient or relocate the receiving antenna.
4 Preface Before using this information and the product it supports, please read the following general information. 1. This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION decided for Acer's "global" product offering. To better fit local market r...
Page 6 - Table Of Contents
6 Table Of Contents Chapter 1 Monitor Features ………………………………………… 7 Introduction ……………………………………… 7 Electrical Requirements ……………………………………… 8 LCD Monitor General Specification ……………………………………… 9 LCD Panel Specification ……………………………………… 10 Factory Preset Timing ……………………………………… 13 Monitor Block Diagram ………...
Page 7 - Monitor Features; Introduction; Scope; Chapter 1
7 Monitor Features Introduction Scope This short specification describes the electrical, optical and functional performance requirements for a 63.2cm (23.6”) TFT LCD color monitor with VGA&DVI compatible interface. Description The LCD monitor is designed with the latest LCD technology to provide...
Page 8 - Electrical Requirements of H235H; Standard Test Conditions; Measurement systems
8 Electrical Requirements of H235H Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Warm up time ＞ 30 min. AC supply voltage 230V± 5 ％ , 50± 3 Hz Ambient temperature 20 ° C ± 5 ° C Humidity 65% ± 20% Display mode 1920 x 1080, 60 Hz, Pi...
Page 9 - LCD Monitor General Specification
9 LCD Monitor General Specification See the image on next page.
Page 11 - General Specifications; Block Diagram; TFT LCD Module; Electrical Characteristics
10 LCD Panel Specification of H235H LTM230HT01 is a color active matrix liquid crystal display (LCD) that uses amorphous silicon TFT (Thin Film Transistor) as switching components. This model is composed of a TFT LCD panel, a driver circuit and a back light unit. The resolution of a 23” is 1920 x 10...
Page 12 - Optical Specifications
Page 14 - Factory Preset Timing of H235H
Page 15 - Monitor Block Diagram
14 Monitor Block Diagram The LCD MONITOR will contain a main board, a power board, and a key board which house the flat panel control logic, brightness control logic and DDC. The power board will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage....
Page 16 - Main Board Diagram
15 Main Board Diagram Flash Memory EN25F20 (U402) Panel Interface (CN404) Crystal 12MHz (X401) Key control Interface (CN401) Scalar IC TSUMO58GDJ-LF (Include MCU, ADC, OSD) (U401) D-Sub Connector (CN402) H sync V sync RGB DVI Connector (CN403) D-DataD-Clock EEPROM M24C02 (U406) EEPROM M24C02 (U405) ...
Page 17 - Power Board Diagram
16 Power Board Diagram DIM EMI filter Start Resistor (R904, R905) PWM Control (IC901) Transformer AC input 16V ON/OFF Feedback Circuit Transformer (PT801) MOSFET (Q805,Q806) Lamp 5V Bridge Rectifier and Filter Feedback Circuit Rectifier diodes Output Circuit PWM Control TA9687GN (IC801) Power Switch...
Page 18 - Software Flow Chart
17 Software Flow Chart N Y 1 2 N Y 5 Y N 10 Y N 12 Y N 7 Y N 6 4 3 8 9 14 11 13 Y N 15 Y N 16 17 19 Y N 18
Page 20 - Main Board Layout
Page 21 - WAFER
20 Symbol Description Symbol Description U401 IC TSUMO58GDJ-LF-1 U601 IC PCM1754DBQR SSOP-16 U402 IC EN25F20-100GCP U603 IC PA6019A4 X401 14.31818MHZ/32PF/49US0 CN401 WAFER U405 M24C02-WMN6TP CN402 D-SUB 15PIN U406 M24C04-WMN6TP CN403 DVI 24PIN CONN F U503 M24C02-WMN6TP CN501 HDMI HEADER 19P +SCREW ...
Page 22 - Installation
21 Installation To install the monitor on your host system, please follow the steps below: Steps 1 Connect the video cable a Make sure both the monitor and computer are switched off. b Connect the VGA video cable to the computer. c Connect the digital cable (only for dual-input models). (1) Make sur...
Page 23 - Attaching the Base; Attach the monitor stand arm to the base.; SCREEN POSITION ADJUSTMENT; connecting the power cord
22 Attaching 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 ADJUSTMENT To optimize the viewing position, you can adjust he monitor tilt, using both of your hands to hold the edges of the monitor. The monitor can be ad...
Page 24 - Operating Instructions; The power cord should be connected.; Front panel controls; Chapter 2
23 Operating Instructions Press the power button to turn the monitor on or off. The other control buttons are located at front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences. • The power cord should be connected. • Connect the video cable f...
Page 26 - How to Adjust a Setting
Page 29 - Machine Disassembly; H235H for maintenance.; The tool for disassembly is as follows:; Remove the screw remarked in red to remove base,; Chapter 3
28 Machine Disassembly This chapter contains step-by-step procedures on how to disassemble the monitor- H235H for maintenance. The tool for disassembly is as follows: Screwdriver, Hexagonal screwdriver, Putty knife. Disassembly Procedure 1.Lay the monitor on a flat, soft and clean surface. 2. Remove...
Page 31 - (3)Remove the four screws remarked in red to remove the hinge,
30 Turn over the monitor and take off the rear cover. (3)Remove the four screws remarked in red to remove the hinge,
Page 36 - Troubleshooting; Chapter 4
35 Troubleshooting This chapter provides troubleshooting information for the H235H: 1. No Power Chapter 4 No power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is normal Reinsert or check the power section Check if X401 oscillate waveforms are nor...
Page 38 - Panel Power Circuit
37 3. Panel Power Circuit White screen Measure Q106 base is low level? X401 oscillate waveform is normal Check CN404 is solder and Q106, Q104 is OK? Check Correspondent component. Replace PANEL Check Correspondent component. Replace U401 OK OK OK Replace X401 OK NG NG NG NG Check reset circuit of U4...
Page 40 - OK
39 5. Power Board 1) No power Check CN902 PIN3, 4 = 5V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit Check start voltage for the pin3 of IC901 Check R904, R905 and Change IC901 NG Check the auxiliary voltage is bigger tha...
Page 42 - Connector Information; 5-Pin Color Display Signal Cable; Chapter 5
41 Connector Information D-sub connect and DVI connect: 15-Pin Color Display Signal Cable 24-Pin Color Display Signal Cable Chapter 5
Page 43 - 9-pin color display signal cable
Page 44 - FRU parts for repair and service of customer machines.; Chapter 6
43 FRU (Field Replaceable Unit) List This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of H235H. Refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization). NOTE: Please note WHEN ORDERING FRU PARTS, that you shoul...
Page 46 - Part List; Above picture show the description of the following component.; Picture; Panel
45 Part List Above picture show the description of the following component. Picture Description TPV Part No. ACER Part NO. Main_frame A15G0820101 60.LHF0B.006 Bezel A34G1361AGBA1B0130 60.LHF0B.003 Panel 750GLG230F1A33N000 LK.23006.001 Power Board PWPC9D41EQKP 55.LHF0B.002
Page 48 - Schematic Diagram; Main Board; Chapter 7
47 Schematic Diagram Main Board +5V_USB + C105 100uF/16V Adj_BAC KLI GH T 5 + C 102 470uF/16V + C 116 470uF/ 16V C 1110.22uF C B 3 8 Tues day , May 12, 2009 715G3266-E < 称爹 > 2.0.POWER G3266-1B-X-X-3-090512 ac er H 235H OEM MODEL Size R ev D at e Sheet of TPV MOD EL PC B NAME 称爹 T P V ( Top Vi...
Page 51 - LVDS Wafer CONNECT
50 LVB1P RXEC- LVA1P LVAC KP VLCD LVB1M LVB2P R XE1+ PB5 R 494 220 OHM 1/4W R XE0+ LVB0P LVA1P R XOC+ LVBC KM PA9 RXE2- C4640.1uF 16V PB2 Panel_VC C PA5 LVB3P PA8 R XO2+ R XE3- RXOC - + C 463 22uF/50V RXO3- R XEC - CN 404 CONN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 2...
Page 54 - Power board
53 Power board +5V R946 820OHM 2W D900 FR107 ZD9 0 2 T ZX 1 8 B L901 27mH 1 4 2 3 IC901 LD7576 1 2 3 4 5 6 7 8 CT COMP CS GNDOUT VCC NC HV F 901 F USE + C918 470UF M 35V CN903 CONN 1 2 3 4 ! + C905 120uF 450V C904 NC(0. 22UF 275V) R910 10R 1/4W 5% R909 3. 3 OHM 1/ 4W CN901 SOCKET 1 2 3 ! +5V1 VOL DI...
