Asus VW171S Service Manual
Asus VW171S Service Manual

Asus VW171S Service Manual

17" lcd color monitor
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17" LCD Color Monitor
Service
Service
Service
Table Of Contents......................................................1
Revision List........................................................2
Important Safety Notice.....................................3
1.Monitor Specification...............................................4
2.LCD Monitor Description........................................5
3.Operation Instruction............................................6
3.1.General Instructions.........................................6
3.2.Control Button......................................................6
3.3.OSD Menu.............................................................7
4.Input/Output Specification.......................................11
4.1.Input Signal Connector.........................................11
4.2.Power Supply Requirements...............................11
4.3.Factory Preset Display Modes..........................12
4.4.Panel Specification.........................................13
5.Block Diagram.......................................................16
5.1.Software Flow Chart...................................16
5.2.Electrical Block Diagram...........................18
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

TABLE OF CONTENTS

Page
Description
6.Schematic.....................................................20
6.1.Main Board...................................................20
6.2.Power Board.............................................24
6.3. Audio Board...............................................26
7.PCB Layout.....................................................27
7.1.Main Board.................................................27
7.2.Power Board..........................................30
7.3.Audio Board................................................32
7.4.Key Board....................................................32
8.Maintainability................................................33
8.2.Trouble Shooting..........................................34
10.Monitor Explode View.................................42
11.BOM List...................................................43
12.Different Part List.......................................54
SAFETY NOTICE
1
ASUS VW171S
Horizontal Frequency
30-82 KHz
Page

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Summary of Contents for Asus VW171S

  • Page 1: Table Of Contents

    17" LCD Color Monitor ASUS VW171S Service Service Service Horizontal Frequency 30-82 KHz TABLE OF CONTENTS Description Page Description Page Table Of Contents..……......…..1 6.Schematic……………........20 6.1.Main Board………..........20 Revision List.…........……..2 Important Safety Notice.……....……..3 6.2.Power Board...……........24 6.3. Audio Board...……........26 1.Monitor Specification......………..4 2.LCD Monitor Description……………………………..5 7.PCB Layout..…………........27...
  • Page 2: Revision List

    17" LCD Color Monitor ASUS VW171S Revision List Version Release Date Revision History TPV Model Name Jul.27, 2007 Initial release T77HMRDD8WUSAN T77GMRHT8WUSAN Oct.22, 2007 Add new BOM in Item12 T77HMRDD8WUSAZ T77HMRDT8WUSAN...
  • Page 3: Important Safety Notice

    17" LCD Color Monitor ASUS VW171S Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations.
  • Page 4: Monitor Specification

    17" LCD Color Monitor ASUS VW171S 1. Monitor Specifications...
  • Page 5: Lcd Monitor Description

    17" LCD Color Monitor ASUS VW171S 2. LCD Monitor Description The LCD monitor will contain a main board, an audio board, a power board and a key board which house the flat panel control logic, brightness control logic and DDC.
  • Page 6: Operation Instruction

    17" LCD Color Monitor ASUS VW171S 3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control buttons are located at the front of the panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences.
  • Page 7: Osd Menu

    17" LCD Color Monitor ASUS VW171S 3.2.2 Key Function 3.3 OSD Menu 3.3.1 How to Reconfigure...
  • Page 8 17" LCD Color Monitor ASUS VW171S 3.3.2 OSD Function Introduction...
  • Page 9 17" LCD Color Monitor ASUS VW171S...
  • Page 10 17" LCD Color Monitor ASUS VW171S...
  • Page 11: Input/Output Specification

    17" LCD Color Monitor ASUS VW171S 4. Input/ Output Specification 4.1 Input Signal Connector Analog connectors Pin No. Description Pin No. Description Red Video Green Video Logic Ground Blue Video Monitor Ground Monitor Ground DDC-Serial Data DDC-Return H-Sync Red Ground...
  • Page 12: Factory Preset Display Modes

    17" LCD Color Monitor ASUS VW171S 4.3 Factory Preset Display Modes...
  • Page 13: Panel Specification

    17" LCD Color Monitor ASUS VW171S 4.4 Panel Specification 4.4.1 General Features _ 17.0 WXGA+ for Monitor application _ High Resolution: 1440*900 _ 2-ch LVDS interface system _ LCD Timing Controller _ Wide Viewing Angle _ RoHS compliance 4.4.2 General Specification...
  • Page 14 17" LCD Color Monitor ASUS VW171S 4.4.3 Optical Characteristics...
  • Page 15 17" LCD Color Monitor ASUS VW171S 4.4.4 Electrical Characteristics (1) TFT-LCD (2) Backlight...
  • Page 16: Block Diagram

    17" LCD Color Monitor ASUS VW171S 5. Block Diagram 5.1 Software Flow Chat...
  • Page 17 17" LCD Color Monitor ASUS VW171S 1) MCU initialize. 2) Is the EPROM blank? 3) Program the EPROM by default values. 4) Get the PWM value of brightness from EPROM. 5) Is the power key pressed? 6) Clear all global flags.
  • Page 18: Electrical Block Diagram

    17" LCD Color Monitor ASUS VW171S 5.2 Electrical Block Diagram 5.2.1 Main Board LCD Interface (CN301) Scalar TSUM16AWR-LF-1 Flash Memory Key Control (Include MCU, ADC, OSD) SST25LF020A Interface (U401) (U203) (CN201) H sync V sync D-Sub Crystal 14.318MHZ Connector (X201)
  • Page 19 17" LCD Color Monitor ASUS VW171S 5.2.2 Inverter/Power Board AC input Bridge Rectifier Transformer Rectifier diodes EMI filter and Filter Start Circuit: R904, R932, R933 CN902 Feedback Circuit Control IC ON/OFF Output Transformer MOSFET Circuit ON/OFF Lamp Control Feedback Circuit...
  • Page 20: Schematic

    17" LCD Color Monitor ASUS VW171S 6. Schematic 6.1 Main Board 715G2564-1D R101 0R05 1/16W R102 100R 1/16W 5% DSUB_H R103 100R 1/16W 5% FB102 DSUB_V VGA_B+ R104 100R 1/16W 5% C101 DSUB_B+ R105 R106 C102 C103 BEAD 0.047uF ZD101...
  • Page 21 17" LCD Color Monitor ASUS VW171S VDDC AVDD VDDP VDDP VCC3.3 FB203 AVDD VCC3.3 300OHM C203 VCTRL C202 0.1uF/16V C207 LVA3P 10uF/16v 0.1uF/16V DSUB_R+ RIN0P LVA3M DSUB_R- RIN0M DSUB_G+ GIN0P DSUB_G- GIN0M LVA2P DSUB_SOG SOGIN0 LVA2M DSUB_B+ BIN0P LVA1P DSUB_B-...
  • Page 22 17" LCD Color Monitor ASUS VW171S PA[0..9] PA[0..9] PANEL_VCC CN301 LVA3P LVA3M LVA2P LVA2M LVA1P C302 LVA1M 0.1uF/16V LVA0P LVA0M R302 LVA3P 330R 1/8W 5% LVA3M LVBCKP LVBCKM LVA2P LVA2M LVA1P LVA1M PB[0..9] LVA0P PB[0..9] LVB3P LVA0M LVB3M LVB3P LVBCKP...
  • Page 23 17" LCD Color Monitor ASUS VW171S VCC3.3 VCC3.3 VCC3.3 CMVCC1 CN401 BAT54C CMVCC CMVCC1 R401 R403 D106 VCC1.8 U702 CMVCC 10K 1/16W 5% 10K 1/16W 5% CMVCC R402 3.3 OHM 2W BKLT-VBRI R415 BKLT-EN BKLT-EN C412 C403 C_PANEL_INDEX C406 PANEL_ID# Volume 0.1uF/16V...
  • Page 24: Power Board

    17" LCD Color Monitor ASUS VW171S 6.2 Power Board 715G2664-1 1/4W R918 F902   0R05 1/4W +12V   1/4W R919 L904 C912 1.1uH 0.001uF ZD902   1/4W R920 RLZ13B C917 C918 680uF/25V 680uF/25V C922 T901 R929 ZD901 1K 1/4W D906...
  • Page 25 17" LCD Color Monitor ASUS VW171S C803 1000pF T801 D805 R817 R821 POWER X'FMR BAW56 10K 1/10W 1K 1/10W 1% CN801 CONN R812 F801   1/4W 0R05 1/4W C819 0.01uF +12V C801 15pF/3KV R801 R806 C802 C824 R855 1K5 1/10W 1% D801 3.6K...
  • Page 26: Audio Board

    17" LCD Color Monitor ASUS VW171S 6.3. Audio Board 715G2767-1 AUDIO+5V R221 10K OHM CONN +12V AUDIO+5V 1K OHM 1/4W R224 MUTE# R223 R219 R220 10K OHM STANDBY 10K OHM D201 1N4148 MUTE C201 R217 C214 1K OHM 1/4W 1.0uF/50V...
  • Page 27: Pcb Layout

    17" LCD Color Monitor ASUS VW171S 7. PCB Layout 7.1 Main Board 715G2564-1D...
  • Page 28 17" LCD Color Monitor ASUS VW171S...
  • Page 29 17" LCD Color Monitor ASUS VW171S...
  • Page 30: Power Board

    17" LCD Color Monitor ASUS VW171S 7.2 Power Board 715G2664-1...
  • Page 31 17" LCD Color Monitor ASUS VW171S...
  • Page 32: Audio Board

    17" LCD Color Monitor ASUS VW171S 7.3 Audio Board 715G2767-1 7.4 Key Board 715G2546-2...
  • Page 33: Maintainability

    17" LCD Color Monitor ASUS VW171S 8. Maintainability 8.1 Equipments and Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with and Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual.
  • Page 34: Trouble Shooting

    17" LCD Color Monitor ASUS VW171S 8.2 Trouble Shooting 8.2.1 Main Board (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...
  • Page 35 17" LCD Color Monitor ASUS VW171S (2). No Picture No picture Measure U702 PIN2=1.8V Measure U701 PIN2=3.3V Replace U701 or U702 X201 oscillate waveforms are normal Replace X201 Check if the sync signal from computer is output and video cable...
  • Page 36 17" LCD Color Monitor ASUS VW171S (3). White screen White screen Measure Q301 base X201 oscillate waveform is normal is low level? Replace X201 Check Q301 and Q302 are broken or CN301 is solder? Check reset circuit of U401 is normal...
  • Page 37 17" LCD Color Monitor ASUS VW171S 8.2.2 Power/Inverter Board 1.) No power Check CN902 pin4, 5 = 12V Check AC line volt 110V or 220V Check AC input Check the voltage of C905 (+) Check bridge rectified circuit and F901 circuit...
  • Page 38 17" LCD Color Monitor ASUS VW171S 2.) W / LED, No Backlight Check CN902 pin4, 5 = 12V Check adapter or MB Check ON/OFF signal Check Interface board Check IC801 PIN12=12V Change Q808, Q805 Check IC801 PIN10, 9 have the output of square wave at short Change IC801 Check Q802 PIN5, 6, 7, 8 have the output of square wave at short time.
  • Page 39 17" LCD Color Monitor ASUS VW171S 8.2.3 Key Board OSD is unstable or not working Is Key Pad Board connecting normally? Connect Key Pad Board Replace Button Switch Is Button Switch normally? Replace Key Pad Board Is Key Pad Board normally?
  • Page 40: White-Balance, Luminance Adjustment

    = 313 ±20, y = 329 ±20, Y= 150 ±15cd/m 3. Into Factory mode of ASUS VW171S: Press the MENU button, pull out the power cord, and then plug the power cord. Then the factory OSD will be at the left top of the panel.
  • Page 41 17" LCD Color Monitor ASUS VW171S 5. Adjust the GREEN of color3 on factory window until chroma 7120 indicator reachedthe value G=100 6. Adjust the BLUE of color3 on factory window until chroma 7120 indicator reached the value B=100 7. Repeat above procedure (item 4,5,6) until chroma 7120 RGB value meet the tolerance =100±2 C.
  • Page 42: Monitor Explode View

    17" LCD Color Monitor ASUS VW171S 10. Monitor Exploded View...
  • Page 43: Bom List

    17" LCD Color Monitor ASUS VW171S 11. BOM List T77HMRDD8WUSAN Location Part No. Description 040G 457834 4A GP S/N LABEL FOR ID 040G 457842 2B PALLET LABEL 040G 581680 1A WARRANTY LABEL 040G 582680 3A PALLET LABEL 040G 582680 4A...
  • Page 44 17" LCD Color Monitor ASUS VW171S AUPC7QU6 AUDIO BOARD CN203 033G3802 4 WAFER EH-4 CN202 033G3802 6 WAFER U201 056G 616 1 IC E-TDA7496L ST C202 067G215V471 4N GP KY25VB470M-CC3 10*16 C201 067G215V471 4N GP KY25VB470M-CC3 10*16 C205 067G215Y4713RV LOW E.S.R 470UF +-20% 16V...
  • Page 45 17" LCD Color Monitor ASUS VW171S CN201 033G3802 6 WAFER CN401 033G3802 9 WAFER 9P RIGHT ANELE PITCH CN301 033G801930F CH JS CONNECTOR 040G 457624 1B LABEL-CPU 040G 45762412B CBPC LABEL R402 061G152M339 64 CHIPR 3.3 OHM +-5% 2W C402 067G 3151014KV EC 105℃...
  • Page 46 17" LCD Color Monitor ASUS VW171S R221 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R222 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R230 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R406 061G0402101 RST CHIPR 100 OHM +-5% 1/16W R137 061G0402102...
  • Page 47 17" LCD Color Monitor ASUS VW171S C201 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C203 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C207 065G0402104 15 MLCC 0402 0.1UF K 16V X5R C117 065G0402104 15 MLCC 0402 0.1UF K 16V X5R...
  • Page 48 17" LCD Color Monitor ASUS VW171S FB103 071G 59K190 B 19 OHM BEAD D106 093G 60505 DIO SIG SM BAT54C(PHSE)R D105 093G 64 42 P BAV70 SOT23 BY PAN JIT D102 093G 6433S DIODE BAV99 SEMTECH D103 093G 6433S DIODE BAV99 SEMTECH...
  • Page 49 17" LCD Color Monitor ASUS VW171S 715G2546 2 KEY BOARD PCB PWPC721HU1 POWER BOARD CN802 033G8020 2E F CONNECTOR CN801 033G8020 2E F CONNECTOR 040G 45762412B CBPC LABEL 051G 6 4503 IC903 056G 139 3A IC PC123Y22FZ0F NR901 061G 58080 WT...
  • Page 50 17" LCD Color Monitor ASUS VW171S Q803 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q811 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q806 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q801 057G 417 4 PMBS3904/PHILIPS-SMT(04) Q804 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q812 057G 417 6 PMBS3906/PHILIPS-SMT(06) Q809 057G 759 2...
  • Page 51 17" LCD Color Monitor ASUS VW171S R802 061G0603560 2F RST CHIPR 56 KOHM +-1% 1/10W R807 061G0603680 2F RST CHIPR 68 KOHM +-1% 1/10W R841 061G0603680 2F RST CHIPR 68 KOHM +-1% 1/10W R853 061G0603680 2F RST CHIPR 68 KOHM +-1% 1/10W...
  • Page 52 17" LCD Color Monitor ASUS VW171S R904 061G1206472 RST CHIPR 4.7 KOHM +-5% 1/4W R932 061G1206472 RST CHIPR 4.7 KOHM +-5% 1/4W R933 061G1206472 RST CHIPR 4.7 KOHM +-5% 1/4W R901 061G1206684 RST CHIPR 680 KOHM +-5% 1/4W R902 061G1206684...
  • Page 53 17" LCD Color Monitor ASUS VW171S D915 093G 64S511SEM IN4148W D916 093G 64S511SEM IN4148W CN901 006G 31500 EYELET NR901 006G 31502 1.5MM RIVET T901 006G 31502 1.5MM RIVET C938 065G 2K152 1T GP CERAMIC CAP C906 065G 2K152 1T6921 1.5NF/2KV Y5P +-10%...
  • Page 54: Different Part List

    17" LCD Color Monitor ASUS VW171S 12. Different Part List Diversity of T77GMRHT8WUSAN Compared with T77HMRDD8WUSAN Location Part No. Description 040G 582680 1A CARTON LABEL 089G 728CAA DB D-SUB 089G402A18N IS POWER CORD/(TPV 共用) 32E1818019 E750L 750GLG71W3A11N PANEL LM171WX3-TLA1 KR LPL...

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