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Acer G195HQ Service Manual

Acer computer monitor user manual
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Acer G195HQ
Service Guide
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  • Page 1 Acer G195HQ Service Guide...
  • Page 2 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 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

    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 Main Board Layout Installation Chapter 2 Operating Instructions User Controls Front Panel Controls eColor Management (OSD) How to Adjust a Setting How to Optimize The DOS-Mode...
  • Page 7: Chapter 1 Monitor Features

    50k hours or more. Panel Signal Interface Sync Type Color Temp User Adjust Speaker Headphone Jack Microphone Jack USB Hub Tilt / Swivel Chart of G195HQ M185XW01 D-Sub 15pin; DVI 24pin(Dual-Input Model); Separate / Compatible Support DDC2B Option Option Yes /No...
  • Page 8: Electrical Requirements

    Electrical Requirements of G195HQ Standard Test Conditions All tests shall be performed under the following conditions, unless otherwise specified. Warm up time AC supply voltage Ambient temperature Humidity Display mode e-color mode Contrast control Color temperature Brightness control Analog Input signal...
  • Page 9: Lcd Monitor General Specification

    LCD Monitor General Specification Driving system Pixel pitch Contrast Ratio LCD Panel Response time Luminance of White Separate Sync. Input H-Frequency V-Frequency Viewing angle H:170°/ V:160° ( type)(CR>10) Display Colors 16.7M Weight(with stand) 3.7KG Weight(without stand) 3.36KG Dimension(with stand) 452.59(H)x 348.90(V) x 173.80(D) (mm) Dimension(without stand) 452.59(H)x 288.95(V) x 60.00(D) (mm) Display mode 1366 x 768 @60Hz...
  • Page 10 60.00 mm 452.59 mm G195HQ 173.80 mm 261.18 mm...
  • Page 11: Lcd Panel Specification

    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 Optical Specifications...
  • Page 13: Factory Preset Timing

    Factory Preset Timing of G195HQ...
  • Page 14: 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 15: Main Board Diagram

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

    Power Board Diagram AC input EMI filter PWM Control (U901) Output Circuit Lamp Feedback Circuit Bridge Transformer Rectifier and Filter Start Resistor (R908) Power Switch (Q901) Photo coupler (U902) Transformer (T801) PWM Control Rectifier diodes Feedback MOSFET (Q803) AM9000ES (U801) 14.5V Circuit 14.5V...
  • Page 17: Software Flow Chart

    Software Flow Chart...
  • Page 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 AUTO and SELECT keys pressed? 8) Enter factory mode.
  • Page 19: Main Board Layout

    Main Board Layout 715G2883 1 6 Symbol Description TSUM1PEL PQFP-100 U401 TSUMU5PEHL-LF PQFP-100(Dual-Input Model) U701 AP1117E33L-13 U106 AZC099-04S SOT23-6L U103 AZC099-04S SOT23-6L U402 EN25F20-100GCP 2Mb SOP-8 U104 AZC099-04S SOT23-6L X401 14.31818MHZ/32PF/49US AZC099-04S SOT23-6L(Dual-Input U106 Model) Symbol Description CN302 WAFER CN701 CONNECTOR 9P 2.0 CN402 CONN 6PIN 2.0...
  • Page 20: Installation

    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: Screen Position Adjustment

    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: Chapter 2 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)

    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 “ AUTO “ Key to confirm the mode and exit the eColor menu.
  • Page 24 1 Press the MENU key to bring up the OSD. 2 Using the keys, select 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 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

    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: Chapter 3 Machine Disassembly

    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 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 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 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 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 7.The panel...
  • Page 33: Chapter 4 Troubleshooting

    Troubleshooting This chapter provides troubleshooting information for the G195HQ: 1.Main Board 1) No Power Press power key and look if the picture is normal Please reinsert and make sure the AC of 100-240 is normal Measure U701 Pin2=3.3V, C704 (+) =1.8V...
  • Page 34 2) No Picture (LED is orange) No picture The button if under control Measure U701 Pin2=3.3V, C704(+)=1.8V X401 oscillate waveform is normal Check HS/VS from CN101 is normal Replace U401 X401 oscillate waveform is normal Check reset circuit of U401 is normal Replace U401 Check U701, Q702 and Q703 Replace X401...
  • Page 35 3) Panel Power Circuit White screen Measure Q302 base is low level? Check CN301 is solder and Q302, Q301 is OK? Check Correspondent component. Replace PANEL X401 oscillate waveform is normal Check reset circuit of U401 is normal Replace U401 Replace X401 Check Correspondent component.
  • Page 36 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 3. Power Board 1) No power Check CN902 PIN6, 7 = 5V Check AC line volt 110V or 220V Check the voltage of C907 (+) Check start voltage for the pin8 of U901 Check the auxiliary voltage is bigger than 11V and smaller than 25V Check U901 pin5 PWM wave Check D902/ Q906/Q904/U902/ZD901/U903...
  • Page 38 2.) No Backlight Check C811(+)=14.5V Check ON/OFF signal Check U801 PIN11,14 have the output of square wave at short time Check Q803 PIN5, 6, 7, 8 have the output of square wave at short time. Check the output of T801 Check connecter &...
  • Page 39: 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 (Dual-Input Model)
  • Page 40: Chapter 6 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 Q12G6300 95 PWPC9821AQMY 756GQ9CB BA256 00 756GQ9CB BA255 00 (Dual-Input Model) KEPC9QKO 0G1G1130 8120 0G1G1130 8120 0Q1G1740 12120 0M1G 140 6125 0Q1G 130 6120 Acer Part No. 60.LJM0B.001 60.LJM0B.008 60.LJM0B.009 (Dual-Input Model) 60.LJM0B.002 60.LJM0B.003 (Dual-Input Model) 60.LJM0B.004 60.LJM0B.005 60.LJM0B.006 60.LJO0B.004 60.LJM0B.007 55.LJM0B.003...
  • Page 42 Above picture show the description of the following component. Picture Description TPV Part No. A15G0933101401 Main_frame A15G0933101301 (Dual-Input Model) Bezel A34G1522AEMA1B0130 Panel 750GLU185X1414N000 A34G1523AEM 4B0100 Rear Cover A34G1523AEM 3B0100 (Dual-Input Model) Power Board PWPC9821AQMY Acer Part No. 60.LJM0B.008 60.LJM0B.009 (Dual-Input Model) 60.LJM0B.001 LK.18005.016 60.LJM0B.002 60.LJM0B.003 (Dual-Input Model) 55.LJM0B.003...
  • Page 43 756GQ9CB BA256 00 Main Board 756GQ9CB BA255 (Dual-Input Model) Key Board KEPC9QKO Hinge A37G0137 1 Base A34G1521AEM 1B0100 Bracket Base A15G0932101 LVDS ASS'Y 095G8018 3XH60 55.LJM0B.001 55.LJM0B.002 (Dual-Input Model) 55.LJO0B.002 60.LJM0B.004 60.LJM0B.007 50.LEF0B.002...
  • Page 44 D-SUB Cable 089G 728CAA DB DVI Cable (Dual-Input 089G1748HAA AC Model) Power Cord 089G404A18N CX 50.LAL0B.002 50.LAN0B.003 50.LBT0B.004...
  • Page 45: Schematic Diagram

    DDC2_SCL DDC2_SDA DDC_WP 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 2.0.INPUT PCB NAME Tuesday , September 01, 2009...
  • Page 46 RXE0- LVA1P LVA0P RXE0+ LVA2P LVACKP LVA1M RXE1- LVA3P LVA1P RXE1+ LVA2M RXE2- LVA2P RXE2+ LVACKM RXEC- LVACKP RXEC+ LVA3M RXE3- LVA3P RXE3+ PANEL_VCC R301 C301 330 OHM 1/4W 0.1uF/16V Size Acer G185H Dual Only CBPC9M6AFQH 称爹 CN301 NC/CONN <称爹>...
  • Page 47 TSUMO58CWHL 3.3 OHM 2W C709 0.1uF/16V 100uF25V T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Acer G185H Dual Only G2883-1-6-X-37-090901 TPV MODEL CBPC9M6AFQH 4.0.POWER PCB NAME Date Tuesday , September 01, 2009 Sheet R706...
  • Page 48 Tuesday , September 01, 2009 Sheet Date FB401 AVDD VCC3.3 FB402 VPLL 300OHM 300OHM C408 C407 0.1uF/16V 0.1uF/16V FB404 VMPLL VCC3.3 VDVI 300OHM R403 0 OHM +-5% 1/8W C414 C415 0.1uF/16V 0.1uF/16V C413 0.1uF/16V DDC_WP Q401 Acer G185H Dual Only Size CBPC9M6AFQH 称爹 <称爹>...
  • Page 49 R139 6K8 1/16W 5% DET_CABLE T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Acer G185H Analog Only 絬 隔 瓜 絪 腹 G2883-1-6-X-42-090901 TPV MODEL CBPC9M5AFQN Key Component 2.0.INPUT PCB NAME Date Tuesday , September 01, 2009...
  • Page 50 LVA2P LVA0M RXE0- LVACKP LVA0P RXE0+ LVA3P LVA1M RXE1- LVA1P RXE1+ LVA2M RXE2- LVA2P RXE2+ LVACKM RXEC- LVACKP RXEC+ LVA3M RXE3- LVA3P RXE3+ PANEL_VCC R301 C301 330 OHM 1/4W 0.1uF/16V Size Acer G185H Analog Only CBPC9M5AFQN 称爹 CN301 NC/CONN <称爹>...
  • Page 51 VCC3.3 1K 1/16W 5% VCC3.3 C707 C709 0.1uF/16V 100uF25V Victory Electronics Co . , Ltd. ) OEM MODEL Acer G185H Analog Only G2883-1-6-X-42-090901 TPV MODEL CBPC9M5AFQN 4.0.POWER PCB NAME Tuesday , September 01, 2009 Sheet adj_BACKLIGHT 2 Size <称爹> 称爹...
  • Page 52 10K 1/16W 5% 0.1uF/16V 10K 1/16W 5% T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL Acer G185H Analog Only 絬 隔 瓜 絪 腹 G2883-1-6-X-42-090901 TPV MODEL CBPC9M5AFQN Key Component 5.0.SCALER PCB NAME Tuesday , September 01, 2009...
  • Page 53 C931 NC/1000uF25V NC/470uF/16V Wire Harness T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL ACER 22" LCD 絬 隔 瓜 絪 腹 G2892-2-3-X-21-090817 TPV MODEL PWPC9821AQMY Key Component 01.POWER PCB NAME 715G2892-2-3 Saturday , August 15, 2009...
  • Page 54 +14.5V RJ805 R811 10K 1/10W 5% C809 0R05 1/4W 5% 0.001uF R817 0.01uF ON/OFF C810 10K 1/10W 5% 20K 1/10W 1% R810 R809 100K 1/10W 5% C808 1uF 16V C807 0.0039uF/16V C811 470uF 25V C814 1uF 25V R816 0.1uF50V 10 OHM +-5% 1/10W C815 R815 10 OHM +-5% 1/10W...
  • Page 55: Key Board

    T P V ( Top Victory Electronics Co . , Ltd. ) OEM MODEL G series 絬 隔 瓜 絪 腹 G3573-1-X-X-2-20090629 TPV MODEL ACER Key Component 02.Key Board PCB NAME 715G3573-1 Thursday , July 09, 2009 Sheet Date SW005 Size <称爹>...