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Acer G195HQ Service Manual

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Acer G195HQ
Service Guide

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  • Page 1 All manuals and user guides at all-guides.com Acer G195HQ Service Guide...
  • Page 2 All manuals and user guides at all-guides.com Service Guide Version and Revision Version Release Date Revision History Customer model TPV model T89AM6D8MXAFH2 Sep-10-2009 Initial Release G195HQ T89AM5D8MXAFN2...
  • 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 All manuals and user guides at all-guides.com 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

    All manuals and user guides at all-guides.com 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 ………………………………………...
  • Page 7: 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 G195HQ Panel M185XW01 D-Sub 15pin;...
  • Page 8: Electrical Requirements

    All manuals and user guides at all-guides.com Electrical Requirements of G195HQ Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. > 30 min. Warm up time AC supply voltage 220V± 5%, 50± 3 Hz 20°C ±...
  • Page 9: Lcd Monitor General Specification

    All manuals and user guides at all-guides.com LCD Monitor General Specification Driving system TFT Color LCD Pixel pitch 0.3(H) x 0.3(V) Contrast Ratio 1000 : 1 (typ) LCD Panel Response time 5ms(Typ.). 8ms(max) Luminance of White 250 cd/m (Typ.) Separate Sync. H/V TTL Input H-Frequency...
  • Page 10 All manuals and user guides at all-guides.com 60.00 mm 452.59 mm G195HQ 173.80 mm 261.18 mm...
  • Page 11: Lcd Panel Specification

    All manuals and user guides at all-guides.com LCD Panel Specification of G195HQ This specification applies to the 18.5 inch-wide Color a-Si TFT-LCD Module M185XW01.The display supports the WXGA - 1366(H) x 768(V) screen format and 16.7M colors (RGB 6-bits +Hi-FRC data). All input signals are 1-channel LVDS interface and this module doesn’t contain an inverter board for backlight.
  • Page 12 All manuals and user guides at all-guides.com Optical Specifications...
  • Page 13: Factory Preset Timing

    All manuals and user guides at all-guides.com Factory Preset Timing of G195HQ...
  • Page 14: Monitor Block Diagram

    All manuals and user guides at all-guides.com 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 15: Main Board Diagram

    All manuals and user guides at all-guides.com Main Board Diagram T89AM6D8MXAFH2 (Dual-Input Model) Crystal 14.31818MHZ Panel Interface (X401) (CN301) Scalar IC TSUMU5PEHL-LF Flash Memory EN25F20 (Include MCU, ADC, OSD) (U402) (U401) H sync D-Data V sync D-Clock D-Sub Connector Connector (CN101) (CN102) T89AM5D8MXAFN2...
  • Page 16: Power Board Diagram

    All manuals and user guides at all-guides.com Power Board Diagram 14.5V AC input Bridge Rectifier EMI filter Transformer Rectifier diodes and Filter Start Resistor (R908) Feedback PWM Control Circuit Power Switch (U901) (Q901) Photo coupler (U902) Output Transformer MOSFET 14.5V Circuit (T801) (Q803)
  • Page 17: Software Flow Chart

    All manuals and user guides at all-guides.com Software Flow Chart...
  • Page 18 All manuals and user guides at all-guides.com 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 19: Main Board Layout

    All manuals and user guides at all-guides.com Main Board Layout 715G2883 1 6 Symbol Description Symbol Description TSUM1PEL PQFP-100 U401 TSUMU5PEHL-LF CN302 WAFER PQFP-100(Dual-Input Model) U701 AP1117E33L-13 CN701 CONNECTOR 9P 2.0 U106 AZC099-04S SOT23-6L CN402 CONN 6PIN 2.0 U103 AZC099-04S SOT23-6L CN101 D-SUB 15PIN VERTICAL CONN WITH SCREW DVI 24PIN CONN F ATTACHED...
  • Page 20: Installation

    All manuals and user guides at all-guides.com Installation To install the monitor to your host system, please follow the steps as given below: Steps 1. 1-1 Connect Video Cable a. Make sure both the monitor and computer are powered-OFF. b. Connect the VGA video cable to the computer. 1-2 Digital Cable (Only Dual-Input Model) a.
  • Page 21 All manuals and user guides at all-guides.com Attaching / Removing the Base Attaching: Align the base with the stand and push the base towards the top of the monitor. Removing: Depress the release hooks as indicated first before removing the base and follow the arrow direction to remove it. Screen Position Adjustment To optimize the viewing position, you can adjust the monitor tilt by using both of your hands to hold the edges of the monitor as shown below.
  • Page 22: Operating Instructions

    Empowering: Press the Empowering Key to open the Acer eColor Management OSD and access the scenario modes. AUTO Auto Adjust: Press this button to activate the Auto Adjustment function. The Auto Adjustment function is used to set the HPos, VPos, Clock and Focus.
  • Page 23: Ecolor Management (Osd)

    All manuals and user guides at all-guides.com eColor Management (OSD) Operation instructions Step 1: Press “ ”Key to open the Acer eColor Management OSD and access the scenario modes Step 2: Press “ ” or “ ” to select the mode Step 3: Press “...
  • Page 24 All manuals and user guides at all-guides.com 1 Press the MENU key to bring up the OSD. 2 Using the keys, select Picture from the OSD. Then navigate to the picture element you wish to adjust. 3 Use the / keys to adjust the sliding scales. 4 The Picture menu can be used to adjust the current Brightness, Contrast,Colour Temp, Auto Config and other image-related qualities.
  • Page 25 All manuals and user guides at all-guides.com Product information 1 Press the MENU key to bring up the OSD. 2 Using the keys, select Information from the OSD. Then the basic information of LCD monitor will show up for current input.
  • Page 26: How To Optimize The Dos-Mode

    All manuals and user guides at all-guides.com 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 27: Machine Disassembly

    All manuals and user guides at all-guides.com Chapter 3 Machine Disassembly This chapter contains step-by-step procedures on how to disassemble the monitor- G195HQ 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 28 All manuals and user guides at all-guides.com 4.Remove the rear cover. 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.
  • Page 29 All manuals and user guides at all-guides.com Turn over the monitor and take off the rear cover. 4. Remove the bezel. Disconnect the connector remarked in green. PS: be careful to Disconnect the Key board connector, because the keyboard connector maybe damage. The cable connect the main board and key board...
  • Page 30 All manuals and user guides at all-guides.com Remove the 2 screws remarked in red. Remove the lamp connectors to remove the panel. Put attention to the LVDS cable. LVDS CABLE...
  • Page 31 All manuals and user guides at all-guides.com 6. Turn over the main frame and remove the four screws remarked in red and disconnected remarked in green to remove the main board and power board. Power board Main board Remove the speakers.(Optional)
  • Page 32 All manuals and user guides at all-guides.com 7.The panel...
  • Page 33: Troubleshooting

    All manuals and user guides at all-guides.com Chapter 4 Troubleshooting This chapter provides troubleshooting information for the G195HQ: 1.Main Board 1) No Power No power Press power key and look if the picture is normal Please reinsert and make sure the...
  • Page 34 All manuals and user guides at all-guides.com 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 U701 Pin2=3.3V, C704(+)=1.8V Replace U401 X401 oscillate...
  • Page 35 All manuals and user guides at all-guides.com 3) Panel Power Circuit White screen Measure Q302 base X401 oscillate is low level? waveform is normal Replace X401 Check CN301 is solder Check reset circuit of and Q302, Q301 is OK? U401 is normal Check Correspondent Check Correspondent component.
  • Page 36 All manuals and user guides at all-guides.com 2. 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...
  • Page 37 All manuals and user guides at all-guides.com 3. Power Board 1) No power Check CN902 PIN6, 7 = 5V Check AC line volt 110V or 220V Check AC input Check the voltage of C907 (+) Check bridge rectified circuit and F902 circuit Check start voltage for the pin8 of U901 Check R908 and Change U901 Check the auxiliary voltage is bigger than...
  • Page 38 All manuals and user guides at all-guides.com 2.) No Backlight Check C811(+)=14.5V Check adapter or MB Check ON/OFF signal Check Interface board Check U801 PIN11,14 have the output of square wave at short time Change U801 Check Q803 PIN5, 6, 7, 8 have the output of square wave at short time. Check Q803 Check the output of T801 Change T801...
  • Page 39: Connector Information

    All manuals and user guides at all-guides.com Chapter 5 Connector Information D-sub connect and DVI connect: 15-Pin Color Display Signal Cable 24-Pin Color Display Signal Cable (Dual-Input Model)
  • Page 40: Fru (Field Replacement Unit) List

    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: G195HQ)
  • Page 41 All manuals and user guides at all-guides.com Item Description TPV Part No. Acer Part No. Q`ty BEZEL L185WA-9acer5 A34G1522AEMA1B0130 60.LJM0B.001 KEY BUTTON A33G0779AEM 1L0100 POWER BUTTON A33G0780AEM 1L0100 LENS A33G0768 1 1C0100 A15G0933101401 60.LJM0B.008 MAINFRAME A15G0933101301 (Dual-Input 60.LJM0B.009 (Dual-Input Model)
  • Page 42 All manuals and user guides at all-guides.com Part List Above picture show the description of the following component. Picture Description TPV Part No. Acer Part No. 60.LJM0B.008 A15G0933101401 60.LJM0B.009 Main_frame A15G0933101301 (Dual-Input (Dual-Input Model) Model) Bezel A34G1522AEMA1B0130 60.LJM0B.001 Panel 750GLU185X1414N000 LK.18005.016...
  • Page 43 All manuals and user guides at all-guides.com 756GQ9CB BA256 00 55.LJM0B.001 55.LJM0B.002 Main Board 756GQ9CB BA255 (Dual-Input (Dual-Input Model) Model) Key Board KEPC9QKO 55.LJO0B.002 Hinge A37G0137 1 60.LJM0B.004 60.LJM0B.007 Base A34G1521AEM 1B0100 Bracket Base A15G0932101 LVDS ASS'Y 095G8018 3XH60 50.LEF0B.002...
  • Page 44 All manuals and user guides at all-guides.com D-SUB Cable 089G 728CAA DB 50.LAL0B.002 DVI Cable (Dual-Input 089G1748HAA AC 50.LAN0B.003 Model) Power Cord 089G404A18N CX 50.LBT0B.004...
  • Page 45: Schematic Diagram

    All manuals and user guides at all-guides.com Schematic Diagram Main Board T89AM6D8MXAFH2 (Dual-Input Model) FB102 MVCC_1 VGA_B+ BEAD H_Sy nc R102 0R05 1/10W 5% R103 1K 1/16W 5% R108 DSUB_H V_Sy nc R104 1K 1/16W 5% DSUB_V D109 75R 1/1 R106 R107 C103...
  • Page 46 C305 AO3401L 100uF25V T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Acer G185H Dual Only 絬 隔 瓜 絪 腹 G2883-1-6-X-37-090901 TPV MODEL CBPC9M6AFQH Key Component 3.0.OUTPUT PCB NAME Tuesday , September 01, 2009...
  • Page 47 All manuals and user guides at all-guides.com CMVCC VCC1.8 C710 0.1uF 16V FB702 300 OHM CN701 C705 C704 SM340A D701 MVCC 0.1uF/16V 100uF25V CMVCC Q702 CMVCC KN2907AS BKLT-VBRI R709 BKLT-EN R710 NC PANEL_ID# PANEL_ID# 2 Volume# FB704 Q703 Volume# Mute KN2907AS BKLT-V Mute 2...
  • Page 48 All manuals and user guides at all-guides.com VCC1.8 VDDC VDDP FB403 VCC3.3 VCC1.8 0 OHM +-5% 1/8W C412 VCC3.3 C409 C403 C404 C406 C402 C410 C411 0.1uF/16V 10uF/50V 0.1uF/16V C405 0.1uF/16V VDVI VMPLL VPLL AVDD VDDP VDDC 0.1uF/16V 0.1uF/16V 0.1uF/16V 0.1uF/16V 0.1uF/16V VCC3.3...
  • Page 49 All manuals and user guides at all-guides.com T89AM5D8MXAFN2 FB102 VGA_B+ BEAD VGA_B- FB103 VGA_G+ BEAD MVCC_1 VGA_G- H_Sy nc R102 0R05 1/10W 5% R103 1K 1/16W 5% DSUB_H V_Sy nc R104 1K 1/16W 5% DSUB_V D109 R106 R107 C103 C104 BAT54C FB101 2K2 1/16W 5%...
  • Page 50 C305 AO3401L 100uF25V T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Acer G185H Analog Onl 絬 隔 瓜 絪 腹 G2883-1-6-X-42-090901 TPV MODEL CBPC9M5AFQN Key Component 3.0.OUTPUT PCB NAME Tuesday , September 01, 2009...
  • Page 51 All manuals and user guides at all-guides.com CMVCC VCC1.8 C710 0.1uF 16V FB702 300 OHM CN701 C705 C704 SM340A D701 MVCC 0.1uF/16V 100uF25V CMVCC Q702 CMVCC KN2907AS BKLT-VBRI R709 BKLT-EN R710 NC PANEL_ID# PANEL_ID# 2 Volume# FB704 Q703 Volume# Mute KN2907AS BKLT Mute 2...
  • Page 52 All manuals and user guides at all-guides.com VCC1.8 VDDC VDDP FB403 VCC3.3 VCC1.8 0 OHM +-5% 1/8W C412 VCC3.3 C409 C403 C404 C406 C402 C410 C411 0.1uF/16V 10uF/50V 0.1uF/16V C405 0.1uF/16V VDVI VMPLL VPLL AVDD VDDP VDDC 0.1uF/16V 0.1uF/16V 0.1uF/16V 0.1uF/16V 0.1uF/16V VCC3.3...
  • Page 53 All manuals and user guides at all-guides.com Power board R929 100 OHM 1/4W BD901 C916 KBP208G R930 100 OHM 1/4W 0.001uF R903 100 OHM 1/4W D901 NC/SR5150 D902 SB5150 R906 100KOHM +-5% 2WS T901 C911 POWER X'FMR R931 C937 1500PF2KV R909 100 OHM 1/4W C909 0.01uF/2KV...
  • Page 54 All manuals and user guides at all-guides.com +14.5V C811 470uF 25V C814 1uF 25V R816 0.1uF50V 10 OHM +-5% 1/10W R807 T801 RJ805 R811 POWER X'FMR C815 R815 10K 1/10W 5% 10K 1/10W 5% C809 0R05 1/4W 5% C813 10 OHM +-5% 1/10W 0.001uF 2N2 50V R817...
  • Page 55 All manuals and user guides at all-guides.com Key board ZD007 NC/UDZSNP5.6B LED001 ZD008 NC/UDZSNP5.6B CN001 LBADC1 R002 2Kohm 1/10W +/-1% LBADC2 LED_GRN# DC_POWERON LED_RED# LED_GRN# LED_RED# R004 2Kohm 1/10W +/-1% CONN C001 C002 C003 C004 C005 R005 1K 1/10W 1% 0.1uF 50V 0.1uF 50V SW006...