Acer H235H manual

1 Acer H235H Service Guide[...]

2 Service Guide V ersion and Revision Version Release Date Revision History Customer model TPV model HD9SA6MK8XA YDC A00 May .-13-2009 Initial Release H235H HD9GA6MK8XABDC[...]

3 Copyright Copyright © 2003 by Acer Incorpo rated. All rights rese rved. No part of this publi cation may be reproduced, Transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, m echanical, m agnetic, optical, chemical, manual or otherwise, without the [...]

4 Preface Before using this information and the produ ct it supp orts, please read the following gene ral information. 1. This Service Guide provides you wi th all technical information relati ng to the BASIC CONFIGURATION decided for Acer's "global" product offering. To better fit local market requirements and e nhan ce product comp[...]

5 Precautions 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 Do not place the monitor on an unsta ble trolley , sta nd, or table. I f the monitor falls, it can injure a person and cause serious damage to the appliance. Use only a trolley or st and recommended by [...]

6 T able Of Contents Chapter 1 Monitor Features ………………………………………… 7 Introduction ……………………………………… 7 Electrical Requirement s ……………………………………… 8 LCD Monitor General S pecification ……………………………………… 9 LCD Panel S pecification ………[...]

7 Monitor Features Introduction Scope This short specification describe s the electrical, opti cal and functional performa nce requirem ents for a 63. 2cm (23.6”) TFT LCD color monito r with VGA&DVI compatible interface. Description The LCD monitor is designed with the latest LCD tec hnolo gy to provide a performance oriented produ ct with no[...]

8 Electrical Requirement s of H235H Standard Test Conditions All tests shall be performed under the foll owin g conditions, unless otherwi se specified. W arm 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, Pixel Clock ： 148.5MHZ,all white e-[...]

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

20.2 11.2 13.8 16.5 X221W 8.1 2.5 20.2 11.2 13.8 16.5 X222W 8.1 2.5 22.7 15 15.3 17.9 X241W 11.7 3.7 18.7 11.2 12.7 X201W 8.1 2.6 16 18.7 11.2 12.7 X202W 8.1 2.6 16 24.3 11.1 16.1 18.6 3.9 8.6 AL2616W 11.7 3.7 11.7 3.7 23.9 15 18.8 15.9 AL2623W 16.3 13.4 7.5 2.2 16.7 14.4 F-17" 18 13.4 7.5 2.4 18 15.7 F-19" 20.1 15.5 8.1 17.5 14.4 F-20&qu[...]

10 LCD Panel Specification of H235H LTM230HT01 is a color active matrix liquid crystal di splay (LCD) that uses amorphous silicon TFT (Thin Film Transistor) as switching com ponents. This model is composed of a TFT LC D pan el, a driver circuit and a back light unit. The resolution of a 23” is 1920 x 1080 and this model can di splay up to 16.7 mi[...]

11 Optical Specifications[...]

12[...]

13 Factory Preset Timing of H235H[...]

14 Monitor Block Diagram The LCD MONITO R will contain a main board, a power boar d, and a key board whi ch house the flat panel cont rol logic, brightness control logic an d DDC. The power board will prov ide AC to DC Inverter voltage to drive the backlight of p anel and the main board chips each voltage. Power Board Flat Panel and CCFL backlight [...]

15 Main Board Diagram Flash Memory EN25F20 (U402) Panel Interface (CN404) Crystal 12MHz (X401) Key control Interface (CN401) Scalar IC TSUMO5 8GDJ-LF (Include MCU, ADC, OSD) (U401) D-Sub Connecto r (CN402) H sync V sync RGB DVI Connecto r ( CN403 ) D-Data D-Clock EEPROM M24C02 ( U406 ) EEPROM M24C02 ( U405 ) EEPROM M24C02 ( U503 ) HDMI Connecto r ([...]

16 Power Board Diagram DIM EMI filter S tart Re sistor (R904, R905) PWM Control (IC901) T r ansformer AC input 16V ON/OFF Feedback Circuit T r ansfor mer (PT801) MOSFET (Q805,Q806) Lamp 5V Bridge Rectifier and Filter Feedback Circuit Rectifier diodes Output Circuit PWM Control T A9687GN (IC801) Power Switch (Q901) Photo coupler (IC903) 5V 16V[...]

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[...]

18 Remark: 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) Is the power key pressed? 6) Clear all global flags. 7) Are the AUT O and SELECT key s pressed? 8) Enter factory mode. 9) Save the power key status into EEPROM. T urn on the LED and set it to green color[...]

19 Main Board Layout[...]

20 Symbol Description Symbol Description U401 IC TSUMO58GDJ- LF-1 U601 IC PCM1754D BQR SSOP-1 6 U402 IC EN25F 20-100GCP 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 HOLE[...]

21 Inst allation To install the monitor on your host system, please follow the ste ps 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 sure both t he monitor and computer are swit ched [...]

22 Att aching 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 h old the edges of the monitor. The monitor can be adju sted to 15 degrees up or 5 degree s down. con[...]

23 O p e r a t i n g I n s t r u c t i o n s Press the power button to turn the monitor on o r of f. The other control buttons are locate d at front panel of the monitor . By changing these settings, the picture can be adju sted to your personal preference s. • The power cord should b e connected. • Connect the video cable from the monitor to t[...]

24[...]

25 How to Adjust a Setting[...]

26[...]

27 How to Optimize The DOS-Mode Plug And Play Plug & Play DDC2B Fea ture This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC ST ANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about it s display capa bilities. The DDC2[...]

28 Machine Disassembl y This chapter contains step-by-step pro cedures 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 clea n surface. 2. Remove the screw remarked in red to remove base, 3.Re[...]

29 (2)Pry the monitor up then find out the hooks’ position, use th e tool (like the picture or ot her card) to inse rt into the gap of bezel and rear cove r[...]

30 T urn over the monitor and take off the re ar cover . (3)Remove the four screws remark ed in red to remove the hinge,[...]

31 (4)Disconnected the connector remarke d in green to remove the bezel. PS: be careful to Disconnect the Key board connector , because the keyboard connector maybe damage. 4. Remove the lamp connectors and the L VDS cable to remove the panel. Key board install: The audio cable should be layout as show[...]

32 5. Remove the five screws remarked in red. L VDS cable[...]

33 6. Remove the five screws remarked in red and disconne cted re marked in green to remove the main b oard and power board. Power board Main board[...]

34 7.The panel[...]

35 T r o u b l e s h o o t i n g 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 normal Measure U104 Pin2=1.8V , U103 PI[...]

36 2. No Picture (LED is orange) No picture The button if under control X401 oscillate waveform is normal Replace U401 Replace X401 Measure U104 Pin2=1.8V , U103 PIN2=3.3V Check Corre spondent component Replace U401 X401 oscillate waveform is normal Check CN101, U104 and U103 OK OK OK OK OK NG NG NG NG Check reset c ircuit of U401 is normal Check H[...]

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 P ANEL Check Correspondent component. Replace U401 OK OK OK Replace X401 OK NG NG NG NG Check reset c ircuit of U401 is normal[...]

38 4. Key Board OSD is unst able or not working Is Key Pad Board connecting normally? Connect Key Board Is Button Switch normally? Replace Button Switch Y NG NG Is Key Pad Board normally? Replace Key Board Y NG Y Check Main Board[...]

39 5. Power Board 1) No power Check CN902 PIN3, 4 = 5V Check AC line volt 1 10V or 220V Check AC inpu t Check the voltage of C9 05 (+) Check bridge rectified circuit and F901 circuit Check sta rt voltage for the pin3 of IC90 1 Check R904, R905 and Change IC901 NG Check the auxiliary voltage is bigger than 1 1V and smaller than 25V 1) Check IC901 2)[...]

40 2.) No Backlight Check if the input voltage of inverter part is 16V NG OK Check adapter p art Check ON/OFF sign al Check Interface board NG OK Check IC801 PIN10=16V NG OK Check ON/OFF cir cuit Check IC801 PIN5 have triangle wave NG OK Change IC801 Check IC801 PIN8/PIN9 PWM wave NG OK Check Q805/Q806/IC801 Check the output of PT801 Check connect [...]

41 Connector Information D-sub connect and DVI connect: 15-Pin Color Display Signal Cable 24-Pin Color Display Signal Cable Chapter 5[...]

42 19-pin color display si gnal cable[...]

43 FRU (Field Replaceable Unit) List This chapter gives you the FRU (Field Repla ceable Unit) lis ting in global configurations of H235H. Refer to this chapter whenever ordering for parts to repair o r for RMA (Return Merchandise Authori zation). NOTE: Please note WHEN ORDERING FRU PARTS, that y ou sho uld check the most up-to-date informatio n ava[...]

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 B UTTON A33G0714BDZ 1L0100 1 4 LED MYLAR Q05G6104 1 1 5 LED COVER A33G0713AGC 1L0100 1 6 MAIN FRAME A15G0820101 60.LHF0B.006 1 7 BASE ASS'Y Q37G015101 1 60.LHF0B.005 1 9 REAR COVER A34G1362AEOA1M0100 60.LHF0B.004 1 1[...]

45 Part List Above picture show the description of the followin g component. Picture Description TPV Part No. ACER Part NO. Main_frame A15G0820101 60.LHF0B.006 Bezel A34G1361AGBA1B0130 60.LHF0B.003 Panel 750GLG230F1A33N000 LK.23006.00 1 Power Board PWPC9D41EQKP 55.LHF0B.002[...]

46 Main Board CBPCRA6ABQ4 55.LHF0B.001 Q37G015101 1 BASE ASS'Y A34G1 136AEM 1B0130 60.LHF0B.005 Rear cover A34G1362AEOA1M0100 60.LHF0B.004[...]

47 S c h e m a t i c D i a g r a m Main Board +5V _U SB + C10 5 100uF/ 16V Adj_BACKLI GH T 5 + C10 2 470uF/ 16V + C1 16 470uF/ 16V C1 11 0.22uF C B 38 Tuesday , May 12, 200 9 715G3266-E < 称爹 > 2.0. POW ER G3266-1B -X -X -3-090512 ac er H 235H OEM M O DE L Size Re v Da te Sheet of TPV MO D EL PC B NAME 称爹 T P V ( T op V ict o ry El ect[...]

48 R457 470R 1/ 16W 5% U405 M24C02-WMN6TP 1 2 3 4 5 6 7 8 A0 A1 A2 VSS SD A SCL WP VCC C455 0.1uF 16V DAT 0+ R474 100R 1/ 16W 5% C449 0.1uF 16V R462 100R 1/ 16W 5% R467 1K 1/ 16W 5% +5V VSI D425 BAV99 3 1 2 C450 22pF VGA_CON R493 10R 1/16W 5% R454 56 OH M 1/16W RX C+ 7 SCL_D VI RED- FB407 30 OHM 1 2 C459 0.1uF 16V D421 BAV99 3 1 2 SDA_D VI DET _V G[...]

49 VCC 3.3 R44 8 10K 1/ 16W 5 % VCC1 .8 R55 5 NC R450 4K7 1/ 16W 5 % C438 0. 1uF 16V LED_A KEY 1 on_BACKLI GHT 3 R41 8 10K 1/ 16W 5% +5V +5V KEY 2 PB6 Q404 2N3904S-R TK/PS VCC 3.3 FB4 05 120 OHM 1 2 R57 0 4K7 1/ 16W 5% PB7 FB4 01 120 OH M 1 2 VCC 3. 3 Sensor_SCL R41 3 470R 1/16 W 5% RIN 4 XO U T R430 3.9K O HM 1/ 16W HDM I_SE L 7 ZD42 7 RLZ5.6 B R4[...]

50 LVB1P RX E C- LVA1P LVAC KP VLC D LVB1M LVB2P RX E 1 + PB5 R4 9 4 220 OH M 1/ 4W RX E 0 + LVB0P LVA1P RX O C+ LVBC KM PA9 RX E 2 - C 464 0. 1uF 16V PB2 Panel_VC C PA5 LVB3P PA8 RX O 2 + RX E 3 - RX O C- + C4 6 3 22uF / 50V RX O 3 - RX E C- CN4 04 CO NN 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 28 29 30 RX O 2 + RX E[...]

51 HD MI1_C K- D501 BAT54C 1 3 2 HDM I_CP- 5 HDM I_S EL 5 Q506 2N3904S-R TK/PS HD MI1_D 1- HDM I_CP -1 C506 0.1uF 16V HDM I_CP- 3 HDM I1_D1 + C509 0.1uF 16V HDM I_H PD 5 CLK + 5 HD MI_5V +5V G+ 5 HI LOW HDM I_CP- 6 R499 100R 1/ 16W 5% +5V HDM I_CP -2 HDM I_CP -5 Q502 NC VC C3. 3 3, 5 RX 0+ 4 B- 5 DVI_ SCL 4 HD MI1_D 2+ RX C + 4 +5V HDM I_CP -3 + C5[...]

52 INR CN60 2 CONN 1 2 3 4 R R61 9 18K 1/16W 5% +5V_AUD I O R R6 09 10K 1/16W 5% HINL + C60 2 10uF / 16V VOL 5 C6 35 0. 47uF / 16V + C63 8 NC 220uF / 25V R64 4 1K 1/ 16W 5% C64 1 NC FB6 11 120 OH M MU TE 5 +5V_AUD I O +5V _U S B U60 1 PC M1754DBQR 2 1 3 16 15 14 13 4 9 8 10 5 12 11 7 6 DA T A BCK LRCK SCK FM T MU TE DE M P DGND AGND VOUTR VCO M NC [...]

53 Power board +5V R94 6 820OHM 2W D90 0 FR10 7 ZD90 2 TZ X1 8B L901 27m H 1 4 2 3 IC90 1 LD75 76 1 2 3 4 5 6 7 8 CT COM P CS GNDO UT VCC NC HV F9 01 FUS E + C91 8 470U F M 35V CN90 3 CONN 1 2 3 4 ! + C90 5 120uF 450V C904 NC (0.22U F 275V) R910 10R 1 /4 W 5% R90 9 3. 3 OH M 1/4W CN90 1 SOCKET 1 2 3 ! +5V1 VOL DIM MU TE C900 3300pF 250V - + BD 901 [...]

54 R 841 1M 1/10W 5% Q802 2N7002 SOT-23 C8 12 NC D8 0 6 BAV70 3 1 2 R8 08 390R 1/ 10W 1% LV1 XXXX R8 44 5. 1K 1/10W 5% Z D803 RL Z5.6 B 1 2 R842 5. 1K 1/ 10W 5% I C 801 ta9687GN -A-0-T R 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 VSEN SST C MP CT RT 1 GN D A PD R2 GN D P NDR2 NDR1 P DR1 V DDA TI ME R PW M IS EN OVPT EN A C8 1 0 0. 0033uF LV2 R815 NC + [...]