Asus VB171D Service Manual

Asus VB171D Service Manual

17" lcd color monitor
Hide thumbs Also See for VB171D:

Advertisement

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
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
5.2.Electrical Block Diagram...........................18
6.Schematic.....................................................20
6.1.Main Board...................................................20
6.2.Power Board.............................................25
7.PCB Layout.....................................................27
7.1.Main Board.................................................27
7.2.Power Board..........................................30
7.3.Key Board....................................................32
8.Maintainability................................................33
8.2.Trouble Shooting..........................................34
10.Monitor Exploded View...............................42
11.BOM List...................................................43
12.Different Parts List.......................................55
SAFETY NOTICE
1
ASUS VB171D
Horizontal Frequency
30-82 KHz
Page

Advertisement

Table of Contents
loading

Summary of Contents for Asus VB171D

  • Page 1: Table Of Contents

    17" LCD Color Monitor ASUS VB171D Service Service Service Horizontal Frequency 30-82 KHz TABLE OF CONTENTS Description Page Description Page 5.2.Electrical Block Diagram……………..…..18 Table Of Contents..……......…..1 Revision List.…........……..2 6.Schematic……………........20 Important Safety Notice.……....……..3 6.1.Main Board………..........20 1.Monitor Specification......………..4 6.2.Power Board...……........25 7.PCB Layout..…………........27 2.LCD Monitor Description……………………………..5...
  • Page 2: Revision List

    17" LCD Color Monitor ASUS VB171D Revision List Version Release Date Revision History TPV Model Name T77SMWDBHGUENN T77SMWDBHGUSNN T77SMWDCHGU2NN T77SMWDCHGU2NZ Nov.05, 2007 Initial release T77SMWDCHGUSNN T77SMWDDHGUSNN T77SMWDDHGUSNZ T77SMWDKHGUSNN...
  • Page 3: Important Safety Notice

    17" LCD Color Monitor ASUS VB171D 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 VB171D 1. Monitor Specifications Driving system TFT Color LCD Size 17" Type LTM170EU-L31 LCD Panel Pixel pitch 0.264mm( H )x 0.264mm( V ) Response time (type) 5ms for SEC panel Viewable angle 160˚ (H) 160˚ (V) (CR≥10)
  • Page 5: Lcd Monitor Description

    17" LCD Color Monitor ASUS VB171D 2. LCD Monitor Description 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 6: Operation Instruction

    17" LCD Color Monitor ASUS VB171D 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 VB171D 3.2.2 Key Function 3.3 OSD Menu 3.3.1 How to Reconfigure...
  • Page 8 17" LCD Color Monitor ASUS VB171D 3.3.2 OSD Function Introduction...
  • Page 9 17" LCD Color Monitor ASUS VB171D...
  • Page 10 17" LCD Color Monitor ASUS VB171D...
  • Page 11: Input/Output Specification

    17" LCD Color Monitor ASUS VB171D 4. Input/ Output Specification 4.1 Input Signal Connector 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 V-Sync Green Ground...
  • Page 12: Factory Preset Display Modes

    17" LCD Color Monitor ASUS VB171D 4.3 Factory Preset Display Modes...
  • Page 13: Panel Specification

    17" LCD Color Monitor ASUS VB171D 4.4 Panel Specification 4.4.1 Features RoHS compliance (Pb-free) High contrast ratio, high aperture ratio, fast response time TN(Twisted Nematic) mode 2 dual CCFTs(Cold Cathode Fluorescent Tube) DE(Data Enable) mode LVDS (Low Voltage Differential Signaling) interface (2pixel/clock) COMPACT SIZE DESIGN TCO’03 compliance...
  • Page 14 17" LCD Color Monitor ASUS VB171D 4.4.3 Optical Characteristics...
  • Page 15 17" LCD Color Monitor ASUS VB171D 4.4.4 Electrical Characteristics (1) TFT-LCD (2) Backlight...
  • Page 16: Block Diagram

    17" LCD Color Monitor ASUS VB171D 5. Block Diagram 5.1 Software Flow Chat...
  • Page 17 17" LCD Color Monitor ASUS VB171D 1) MCU initializes. 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 VB171D 5.2 Electrical Block Diagram 5.2.1 Main Board Panel Interface (CN703) Scalar TSUM16AWK-LF-1 EEPROM Keypad Interface (Include MCU, ADC, OSD) M24C02 (CN404) (U401) (U406) H sync V sync Flash Memory Crystal PM25LV010A 14.31818MHZ (U402) (X401)
  • Page 19 17" LCD Color Monitor ASUS VB171D 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 VB171D 6. Schematic 6.1 Main Board 715G2571-1-2 TSUM56AHK SCHEMATIC XGA/SXGA/WSXGA LVDS OUTPUT GNDR GNDR GNDG GNDG GNDB GNDB HSY NC HSY NC VCC1.8 VCC3.3 +12V VSY NC VSY NC DDCA_SDA DDCA_SDA DDCA_SCL DDCA_SCL INPUT_DET INPUT_DET VCC1.8...
  • Page 21 17" LCD Color Monitor ASUS VB171D VCC3.3 SOT-223 R707 R720 +12V VCC3.3 R701 1K 1/16W U701 D701 CN701 +12V 4 VCC3.3 R702 47R 1/16W SMAL140 C706 10uF/50V R703 4K7 1/16W Adj_BACKLIGHT C703 R706 NC(1uF 10V) Q701 VCC3.3 PMBS3904 R721 R716...
  • Page 22 17" LCD Color Monitor ASUS VB171D RED+ FB401 0R05 1/10W R404 C404 0.047uF RED- 56Ω 1% 1/16W GREEN+ FB402 0R05 1/10W R406 C406 0.047uF GREEN- 56Ω 1% 1/16W BLUE+ FB403 0R05 1/10W R408 C408 0.047uF BLUE- 56Ω 1% 1/16W PC5V...
  • Page 23 17" LCD Color Monitor ASUS VB171D VDVI VMPLL VPLL AVDD VDDP VDDC VCC3.3 VDDP VCC3.3 AVDD FB407 FB406 U401 VCC3.3 VCC3.3 TSUM56AWHK-LF 600 OHM 600 OHM C435 VCTRL 0.047uF NC/LVACKP/NC C430 C431 C432 C433 C434 RIN0P NC/LVACKM/NC 0.047uF 0.047uF 33pF...
  • Page 24: Panel Interface

    17" LCD Color Monitor ASUS VB171D CN703 LVB0M RXO0- RXO0+ LVB0P LVB1M RXO1- RXO1+ LVB1P LVB2M RXO2- RXO2+ LVB2P PA[0..9] LVBCKM RXOC- RXOC+ LVBCKP PA[0..9] LVACKP LVB3M RXO3- RXO3+ LVB3P LVACKM LVA0M RXE0- RXE0+ LVA0P LVA2P LVA1M RXE1- RXE1+ LVA1P...
  • Page 25: Power Board

    17" LCD Color Monitor ASUS VB171D 6.2 Power Board 715G2538-3 1/4W R918 F902   0R05 1/4W +12V   1/4W R919 L904 C912 1.1uH 0.001uF   1/4W R920 C917 C918 C922 680uF/25V 680uF/25V T901 ZD901 D906 SP10100 BD901 KBP208G R904 R905...
  • Page 26 17" LCD Color Monitor ASUS VB171D 715G2538-3 T801 POWER X'FMR D805 R817 R821 BAW56 10K 1/10W 1K 1/10W 1% CN801 R855 CONN 1/4W   F801 C819 0R05 1/4W 0.0022uF +12V C801 C802 10pF/3KV R819 470uF/25V C824 R801 D801 3.6KOHM 1/10W 0.1uF...
  • Page 27: Pcb Layout

    17" LCD Color Monitor ASUS VB171D 7. PCB Layout 7.1 Main Board 715G2571-1-2...
  • Page 28 17" LCD Color Monitor ASUS VB171D...
  • Page 29 17" LCD Color Monitor ASUS VB171D...
  • Page 30: Power Board

    17" LCD Color Monitor ASUS VB171D 7.2 Power Board 715G2538-3...
  • Page 31 17" LCD Color Monitor ASUS VB171D...
  • Page 32: Key Board

    17" LCD Color Monitor ASUS VB171D 7.3 Key Board 715G2546-2...
  • Page 33: Maintainability

    17" LCD Color Monitor ASUS VB171D 8. Maintainability 8.1 Equipments and Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with an IBM Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual.
  • Page 34: Trouble Shooting

    17" LCD Color Monitor ASUS VB171D 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 VB171D (2). No Picture No picture Measure U701 PIN2=3.3V Measure U702 PIN2=1.8V Replace D701, U701 or U702 X401 oscillate waveforms are normal Replace X401 Check if the sync signal from computer is output and video cable...
  • Page 36 17" LCD Color Monitor ASUS VB171D (3). White screen White screen Measure Q704 base X401 oscillate waveform is normal is low level? Replace X401 Check Q704 Q703 is broken or CN703 solder? Check reset circuit of U401 is normal Check Correspondent Check Correspondent component.
  • Page 37 17" LCD Color Monitor ASUS VB171D 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 VB171D 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 Check IC801 PIN10, 9 have the output of square wave at short Change IC801 Check Q802, Q803 PIN5, 6, 7, 8 have the output of square wave at short time.
  • Page 39 17" LCD Color Monitor ASUS VB171D 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 VB171D: 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 VB171D 5. Adjust the GREEN color on factory window until chroma 7120 indicator reachedthe value G=100 6. Adjust the BLUE color 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 Exploded View

    17" LCD Color Monitor ASUS VB171D 10. Monitor Exploded View...
  • Page 43: Bom List

    17" LCD Color Monitor ASUS VB171D 11. BOM List T77SMWDBHGUENN Location Part No. Description 040G 457834 4A GP S/N LABEL FOR ID 040G 457842 2B PALLET LABEL 040G 58160811A GREEN DOT LABEL 040G 581680 1A WARRANTY LABEL 040G 582680 3A...
  • Page 44 17" LCD Color Monitor ASUS VB171D CN404 033G8027 12 WAFER 2*6P 2.0MM R/A CN703 033G8027 24 H CONN W TO B12P*2 P*2.0 4505-2 040G 45762412B CBPC LABEL C706 067G215V100 7N KY50VB10-M-CC3 5*11.5MM C708 067G215V100 7N KY50VB10-M-CC3 5*11.5MM C711 067G215V100 7N KY50VB10-M-CC3 5*11.5MM...
  • Page 45 17" LCD Color Monitor ASUS VB171D R469 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R465 061G0402102 RST CHIPR 1 KOHM +-5% 1/16W R710 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R708 061G0402103 RST CHIPR 10 KOHM +-5% 1/16W R704 061G0402103...
  • Page 46 17" LCD Color Monitor ASUS VB171D R418 061G0402472 RST CHIPR 4.7 KOHM +-5% 1/16W R417 061G0402510 Y RST CHIP 51R 1/16W 5% R419 061G0402510 Y RST CHIP 51R 1/16W 5% R711 061G0402513 RST CHIP 51K 1/16W 5% R404 061G0402560 9F...
  • Page 47 17" LCD Color Monitor ASUS VB171D C412 065G0402221 32 MLCC 0402 CAP 220PF J 50V X7R C433 065G0402221 32 MLCC 0402 CAP 220PF J 50V X7R C434 065G0402221 32 MLCC 0402 CAP 220PF J 50V X7R C448 065G0402224 17 CAP CER 0.22UF -20%-80%...
  • Page 48 17" LCD Color Monitor ASUS VB171D KEPC7QAA5 KEY BOARD CN101 033G8032 8D WAFER 1.25MM R102 061G0603000 RST CHIPR 0 OHM +-5% 1/10W R105 061G0603000 RST CHIPR 0 OHM +-5% 1/10W R108 061G0603000 RST CHIPR 0 OHM +-5% 1/10W R103 061G0603103...
  • Page 49 17" LCD Color Monitor ASUS VB171D C921 065G306M4722BP 4700PF +-20% 400VAC C905 067G 40Z10115K CAP 105℃ 100UF M 450V C802 067G215D4714KV E.C 105℃ CAP 470UF M 25V ED SERIES C803 067G215D4714KV E.C 105℃ CAP 470UF M 25V ED SERIES C917 067G215D6814KV CAP 105℃...
  • Page 50 17" LCD Color Monitor ASUS VB171D Q803 057G 763 14 AM9945N Q802 057G 763 14 AM9945N R827 061G0603000 RST CHIPR 0 OHM +-5% 1/10W R801 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W R809 061G0603100 1F RST CHIPR 1 KOHM +-1% 1/10W...
  • Page 51 17" LCD Color Monitor ASUS VB171D R854 061G0603680 2F RST CHIPR 68 KOHM +-1% 1/10W R853 061G0603680 2F RST CHIPR 68 KOHM +-1% 1/10W R841 061G0603680 2F RST CHIPR 68 KOHM +-1% 1/10W R850 061G0805000 0 OHM 1/10W R839 061G0805000...
  • Page 52 17" LCD Color Monitor ASUS VB171D R923 061G1206102 RST CHIPR 1 KOHM +-5% 1/4W R928 061G1206102 RST CHIPR 1 KOHM +-5% 1/4W R855 061G1206330 RST CHIPR 33 OHM +-5% 1/4W R857 061G1206330 RST CHIPR 33 OHM +-5% 1/4W R856 061G1206330...
  • Page 53 17" LCD Color Monitor ASUS VB171D C912 065G1206102 72 CHIP 1000PF 500V X7R D808 093G 64 38 P BAW56 D805 093G 64 38 P BAW56 D903 093G 64 38 P BAW56 D806 093G 6432S IN4148W D814 093G 6432S IN4148W D817...
  • Page 54 17" LCD Color Monitor ASUS VB171D Q45G 88607 25 PE BAG FOR BASE Q45G 88609 86 EPE COVER Q52G 1185 69 ASUS BIG TAPE Q52G6019 24 TAPE-FIX FOR ASUS S95G801830154 LVDS ASS'Y 033F303SM24K30 PK2407P30/TD00-30LH 033F 206 24 DF11-24DS-2C 033F206T 24...
  • Page 55: Different Parts List

    17" LCD Color Monitor ASUS VB171D 12. Different Parts List Diversity of T77SMWDCHGUSNN compared with T77SMWDBHGUENN Location Part No. Description 089G412A18NIS3 POWER CORD/32E1818058(与 TPV 共用) Q41G780068031B WARRANTY CARD APAC NZBD Diversity of T77SMWDCHGU2NN compared with T77SMWDBHGUENN Location Part No. Description 089G412A18NIS3 POWER CORD/32E1818058(与...
  • Page 56 17" LCD Color Monitor ASUS VB171D Diversity of T77SMWDCHGU2NZ compared with T77SMWDBHGUENN Location Part No. Description 089G412A18NIS3 POWER CORD/32E1818058(与 TPV 共用) Q40G000268027A SPLENDID ZBD LABEL Q41G780068032A APAC WARRANTY CARD ZBD Diversity of T77SMWDKHGUSNN compared with T77SMWDBHGUENN Location Part No. Description 089G402A18N IS POWER CORD/(TPV 共用)32E1818019...

Table of Contents