Acer H235H Service Manual
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Acer H235H Service Manual

Acer H235H Service Manual

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Acer H235H
Service Guide
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Summary of Contents for Acer H235H

  • Page 1 Acer H235H Service Guide More user manuals on ManualsBase.com...
  • Page 2 Service Guide Version and Revision Version Release Date Revision History Customer model TPV model HD9SA6MK8XAYDC May.-13-2009 Initial Release H235H HD9GA6MK8XABDC More user manuals on ManualsBase.com...
  • Page 3 Any Acer Incorporated software described in this manual is sold or licensed "as is". Should the programs prove defective following their purchase, the buyer (and not Acer Incorporated, its distributor, or its dealer) assumes the entire cost of all necessary servicing, repair, and any incidental or consequential damages resulting from any defect in the software.
  • Page 4 DIFFERENT part number code to those given in the FRU list of this printed Service Guide. You MUST use the list provided by your regional Acer office to order FRU parts for repair and service of customer machines. Warning: (For FCC Certified Models) Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
  • Page 5 Precautions Do not use the monitor near water, e.g. near a bathtub, washbowl, kitchen sink, laundry tub, swimming pool or in a wet basement. Do not place the monitor on an unstable trolley, stand, or table. If the monitor falls, it can injure a person and cause serious damage to the appliance.

  • Page 6: Table Of Contents

    Table Of Contents Chapter 1 Monitor Features ………………………………………… Introduction ……………………………………… Electrical Requirements ……………………………………… LCD Monitor General Specification ……………………………………… LCD Panel Specification ……………………………………… Factory Preset Timing ……………………………………… Monitor Block Diagram ……………………………………… Main Board Diagram ……………………………………… Power Board Diagram …………………………………….. Software Flow chart ………………………………………...

  • Page 7: Chapter 1 Monitor Features

    This will alleviate the growing health concerns. It is also a space saving design, allowing more desktop space, and comparing to the traditional CRT monitor, it consumes less power and gets less weight in addition MTBF target is 50k hours or more. Chart of H235H Panel LTM230HT01 A03(003) SZ SEC Signal Interface D-Sub 15pin;DVI 24pin;HDMI...

  • Page 8: Electrical Requirements

    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 20°C ± 5°C Ambient temperature 65% ± 20%...

  • Page 9: Lcd Monitor General Specification

    LCD Monitor General Specification See the image on next page. More user manuals on ManualsBase.com...
  • Page 10 55.2 6.45 17.2 27.0...

  • Page 11: Lcd Panel Specification

    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.
  • Page 12 Optical Specifications More user manuals on ManualsBase.com...
  • Page 13 More user manuals on ManualsBase.com...

  • Page 14: Factory Preset Timing

    Factory Preset Timing of H235H More user manuals on ManualsBase.com...

  • Page 15: Monitor Block Diagram

    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

    Main Board Diagram Crystal 12MHz Panel Interface (X401) (CN404) Audio Digital-to-Analog converter PCM1754DBQR Scalar IC TSUMO58GDJ-LF Key control Interface (U601) (CN401) PC_INL (Include MCU, ADC, OSD) HDMI_INL PC_INR HDMI_INR (U401) Audio Power Amplifier Flash Memory TA6019A4 EN25F20 (U603) (U402) H sync D-Data V sync D-Clock...

  • Page 17: Power Board Diagram

    Power Board Diagram AC input Bridge Rectifier EMI filter Transformer Rectifier diodes and Filter Start Resistor (R904, R905) Feedback PWM Control Circuit Power Switch (IC901) (Q901) Photo coupler (IC903) Output Transformer MOSFET (PT801) Circuit (Q805,Q806) Lamp PWM Control Feedback TA9687GN ON/OFF Circuit (IC801)

  • Page 18: Software Flow Chart

    Software Flow Chart More user manuals on ManualsBase.com...
  • Page 19 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 AUTO and SELECT keys pressed? 8) Enter factory mode.

  • Page 20: Main Board Layout

    Main Board Layout More user manuals on ManualsBase.com...
  • Page 21 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 HOLE More user manuals on ManualsBase.com...

  • Page 22: Installation

    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).

  • Page 23: Attaching The Base

    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.

  • Page 24: Chapter 2 Operating Instructions

    Chapter 2 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. •...
  • Page 25 More user manuals on ManualsBase.com...

  • Page 26: How To Adjust A Setting

    How to Adjust a Setting More user manuals on ManualsBase.com...
  • Page 27 More user manuals on ManualsBase.com...

  • Page 28: How To Optimize The Dos-Mode

    How to Optimize The DOS-Mode Plug And Play Plug & Play DDC2B Feature This monitor is equipped with VESA DDC2B capabilities according to the VESA DDC STANDARD. It allows the monitor to inform the host system of its identity and, depending on the level of DDC used, communicate additional information about its display capabilities.

  • Page 29: Chapter 3 Machine Disassembly

    Chapter 3 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.
  • Page 30 (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 cover More user manuals on ManualsBase.com...
  • Page 31 Turn over the monitor and take off the rear cover. (3)Remove the four screws remarked in red to remove the hinge, More user manuals on ManualsBase.com...
  • Page 32 (4)Disconnected the connector remarked in green to remove the bezel. PS: be careful to Disconnect the Key board connector, because the keyboard connector maybe damage. Key board install: The audio cable should be layout as show 4. Remove the lamp connectors and the LVDS cable to remove the panel. More user manuals on ManualsBase.com...
  • Page 33 LVDS cable 5. Remove the five screws remarked in red. More user manuals on ManualsBase.com...
  • Page 34 6. Remove the five screws remarked in red and disconnected remarked in green to remove the main board and power board. Main board Power board More user manuals on ManualsBase.com...
  • Page 35 7.The panel More user manuals on ManualsBase.com...

  • Page 36: Chapter 4 Troubleshooting

    Chapter 4 Troubleshooting This chapter provides troubleshooting information for the H235H: 1. No Power 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 Measure U104 Pin2=1.8V, U103 PIN2=3.3V...
  • Page 37 2. No Picture (LED is orange) No picture The button if under X401 oscillate Replace X401 control waveform is normal Check reset circuit of Check Correspondent U401 is normal component Measure U104 Pin2=1.8V, U103 PIN2=3.3V Replace U401 X401 oscillate waveform is normal Check CN101, U104 and U103 Replace X401 Check HS/VS from...
  • Page 38 3. Panel Power Circuit White screen Measure Q106 base X401 oscillate is low level? waveform is normal Replace X401 Check CN404 is solder Check reset circuit of and Q106, Q104 is OK? U401 is normal Check Correspondent Check Correspondent component. component.
  • Page 39 4. Key Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Board Replace Button Switch Is Button Switch normally? Replace Key Board Is Key Pad Board normally? Check Main Board More user manuals on ManualsBase.com...
  • Page 40 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 Check the auxiliary voltage is bigger than 11V and smaller than 25V...
  • Page 41 2.) No Backlight Check if the input voltage of inverter part is 16V Check adapter part Check ON/OFF signal Check Interface board Check IC801 PIN10=16V Check ON/OFF circuit Check IC801 PIN5 have triangle wave Change IC801 Check IC801 PIN8/PIN9 PWM wave Check Q805/Q806/IC801 Check the output of PT801 Change PT801...

  • Page 42: Chapter 5 Connector Information

    Chapter 5 Connector Information D-sub connect and DVI connect: 15-Pin Color Display Signal Cable 24-Pin Color Display Signal Cable More user manuals on ManualsBase.com...
  • Page 43 19-pin color display signal cable More user manuals on ManualsBase.com...

  • Page 44: Exploded Diagram

    NOTE: To scrap or to return the defective parts, you should follow the local government ordinance or regulations on how to dispose it properly, or follow the rules set by your regional Acer office on how to return it. Exploded Diagram (Model: H235H) More user manuals on ManualsBase.com...
  • Page 45 Item Description TPV Part No. ACER Part NO. Q`ty BEZEL A34G1361AGBA1B0130 60.LHF0B.003 POWER MYLAR Q05G6104 1 POWER BUTTON A33G0714BDZ 1L0100 LED MYLAR Q05G6104 1 LED COVER A33G0713AGC 1L0100 MAIN FRAME A15G0820101 60.LHF0B.006 BASE ASS'Y Q37G0151011 60.LHF0B.005 REAR COVER A34G1362AEOA1M0100 60.LHF0B.004...
  • Page 46 Part List Above picture show the description of the following component. Picture Description TPV Part No. ACER Part NO. 60.LHF0B.006 Main_frame A15G0820101 Bezel A34G1361AGBA1B0130 60.LHF0B.003 Panel 750GLG230F1A33N000 LK.23006.001 Power Board PWPC9D41EQKP 55.LHF0B.002 More user manuals on ManualsBase.com...
  • Page 47 Main Board CBPCRA6ABQ4 55.LHF0B.001 Q37G0151011 BASE ASS'Y 60.LHF0B.005 A34G1136AEM 1B0130 Rear cover A34G1362AEOA1M0100 60.LHF0B.004 More user manuals on ManualsBase.com...

  • Page 48: Chapter 7 Schematic Diagram

    0.1uF 16V 100uF/16V TO263 NC/AIC1084-18PM T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size acer H235H G3266-1B-X-X-3-090512 TPV MODEL 絬 隔 瓜 絪 腹 Key Component 2.0.POWER PCB NAME 715G3266-E <称爹> 称爹 Tuesday , May 12, 2009...
  • Page 49 C459 C460 C461 C462 T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size acer H235H 0.1uF 16V 0.1uF 16V 0.1uF 16V 0.1uF 16V 0.1uF 16V 0.1uF 16V 0.1uF 16V 0.1uF 16V G3266-1B-X-X-3-090512 TPV MODEL 絬...
  • Page 50 CN407 CONN CONN T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size acer H235H G3266-1B-X-X-3-090512 TPV MODEL 絬 隔 瓜 絪 腹 Key Component 4.0.SCALER PCB NAME 715G3266-E <称爹> 称爹 Tuesday , May 12, 2009...
  • Page 51 RXE3+ NC CONN Panel_VCC T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size acer H235H G3266-1B-X-X-3-090512 TPV MODEL 絬 隔 瓜 絪 腹 Key Component 5.0.PANEL INTERFACE PCB NAME 715G3266-E <称爹> 称爹 Tuesday , May 12, 2009...
  • Page 52 0.1uF 16V HDMI input channel 0=B,1=G,2=R T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size Custom acer H235H 絬 隔 瓜 絪 腹 G3266-1B-X-X-3-090512 TPV MODEL Key Component 6.0.HDMI INPUT PCB NAME 715G3266-E <称爹> 称爹...
  • Page 53 120 OHM 120 OHM 120 OHM T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Size Custom acer H235H G3266-1B-X-X-3-090512 TPV MODEL 絬 隔 瓜 絪 腹 Key Component 7.0.AUDIO PCB NAME 715G3266-E <称爹> 称爹 Sheet...
  • Page 54 Power board BD901A KBP208G L904 100 OHM 1/4W R918 +16V 100 OHM 1/4W R919 Coil C912 BD901 0.001uF GBU408 100 OHM 1/4W R920 R946 R947 ZD90 2 C917 C918 T ZX18 B 470UF M 35V D906 820OHM 2W 820OHM 2W FB902 0R05 1/4W FMX-12SL...
  • Page 55 4R7 1/8W 5% R817 +16V Q805 ZD802 ON/OFF RLZ5.6B ZD803 G1 D1 RLZ5.6B R816 4R7 1/8W 5% CN801 R803 R804 PT801 APM4548 5K1 1/8W 5% 5K1 1/8W 5% POWER X'FMR C819 56pF3KV C815 0.1uF R846 0R05 1/8W R819 Q806 C802 4R7 1/8W 5% CONN 0.047uF...

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