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Buffalo FTD-G731AS Service Manual

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SERVICE MANUAL

FTD-G731AS
FTD-G731AS/BK
THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY REASONABLE
EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE
ACCURACY OFTHIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR
CHANGES, ERRORS OR OMISSIONS.
MANUFACTURE DATA：Nov-01-2004

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Summary of Contents for Buffalo FTD-G731AS

  • Page 1: Service Manual

    SERVICE MANUAL FTD-G731AS FTD-G731AS/BK THESE DOCUMENTS ARE FOR REPAIR SERVICE INFORMATION ONLY.EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL; WE CANNOT GUARANTEE THE ACCURACY OFTHIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS RELIABILITY FOR CHANGES, ERRORS OR OMISSIONS.

  • Page 2: Table Of Contents

    BUFFALO Service Manual Table of Contents Table of Contents ------------------------------------------------------------------------------ 02 Revision List -------------------------------------------------------------------------------------03 1 . M o n i t o r Sp e c i f i c a t i o n - - - - - - -- - - - - - -- - - - - --- - - - - - -- - - - - --- - - - - - -- - - - -- -- - - - - - -- - - - -- -- - - - - - 0 4 2 .

  • Page 3: Revision List

    BUFFALO Service Manual Revision List Revision Date Change Description TPV model name Nov-01-04 Initial release Mar-13-06 Change the Main Board T780KA4NJSB1A/T780KA4NJSB2A...

  • Page 4: M O N I T O R Sp E C I F I C A T I O

    BUFFALO Service Manual 1.MONITOR SPECIFICATIONS Driving system TFT LCD Size 17.0"(43.2cm) Horizontal: 337.920mm Active Area Vertical: 270.336mm Panel AU M170EG01 Pixel pitch 0.264mm(H) x 0.264mm(V) LCD Panel Viewing angle 140(H) 130(V) (CR>10) Luminance 260 cd/m (typ) Contrast Ratio 450:1 (typ)

  • Page 5: Lcd Monitor Description

    BUFFALO Service Manual 2.LCD MONITOR DESCRIPTION The LCD MONITOR will contain an main board, an inverter/power board, an audio board, keypad 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: Operating Instructions

    BUFFALO Service Manual 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 front panel of the monitor. By changing these settings, the picture can be adjusted to your personal preferences.

  • Page 7: Adjusting The Picture

    BUFFALO Service Manual 3.3 ADJUSTING THE PICTURE Steps: 1.Press MENU button to display OSD main menu, Press Left button or Right button may select other main Menu. 2. Press MENU button to adjust items of each main menu. 3. Press Left button or Right button may select item you wish to enter.
  • Page 8 BUFFALO Service Manual Main Menu Item Sub Menu Item Sub Menu Icon Description Auto Auto adjust color Recall Color Temperature from Color Temp EEPROM Color Red Setting Red Gain from Digital-register Green Setting Green Gain from Digital-register Blue Setting Blue Gain from Digital-register...

  • Page 9: I N P U T / O U T P U T Sp E C I F I C A T I O N

    BUFFALO Service Manual 4. INPUT/OUTPUT SPECFICATION 4.1 INPUT SIGNAL CONNECTOR PIN NO. DESCRIPTION PIN NO. DESCRIPTION Green Detect Cable Blue Ground DDC-Serial Data Ground H-Sync R-Ground V-Sync G-Ground DDC-Serial Clock B-Ground VGA Connector layout 4.2 FACTORY PRESET DISPLAY MODES: VESA MODES...

  • Page 10: P O W E R S U P P L Y R E Q U I R E M E N

    BUFFALO Service Manual 1280x1024@75Hz 1688x1066 79.976 75.025 135.000 1280x960@60Hz 1800x1000 1280x1024@70Hz 1720x1064 74.4 124.9 1280x1024@72Hz 1724x1066 77.9 134.6 IBM MODES Horizontal Vertical Nominal Nominal Nominal Sync Sync Pixel Mode Resolution Total Frequency Freq. Polarity Polarity Clock +/- 0.5kHz +/- 1 Hz...

  • Page 11: Software Flow Chart

    BUFFALO Service Manual 5. SOFTWARE FLOW CHART 1. Initialize MCU settings, including I/O, Timer, ISR and Serial Port settings. 2. Read EEPROM content to recover monitor settings, including brightness, contrast, color temperature and OSD position etc. 3. Initialize system variable, including system flag, OSD timeout counter, burin mode status…...

  • Page 12: Block Diagram

    BUFFALO Service Manual 6. Circuit Diagram 6.1 BLOCK DIAGRAM Scalar TSU16AK-LFT (Include ADC, OSD) EPR_SDA EPR_SCL H sync EEPROM V sync M24C16 DB15_SDA D-Sub DB15_SCL EEPROM Connector M24C02 Main Board AC input Bridge Rectifier Transformer Rectifier CMOS EMI filter and Filter...

  • Page 13: Introduction Of Main Ic

    BUFFALO Service Manual 6.2 Introduction of main IC TSU16AK-LFT: the MST8111B is a high performance, and fully integrated graphics processing IC solution for LCD monitors with resolutions up to XGA. It is configured with an integrated triple-ADC/PLL, a high quality scaling engine, an on-screen display controller, a built-in output clock generator, and LVDS display interface.
  • Page 14 BUFFALO Service Manual BA9741F: PWM control, voltage range for working: 3.6~35V, Has such functions as short-voltage protection, Over-voltage protection, over-current protection and etc. The function of each pin and the circuit diagram inside are as follows: NAME FUNCTION NAME FUNCTION...
  • Page 15 BUFFALO Service Manual TDA7496: It is a stereo 2W+2W class AB power amplifier assembled, specially designed for high quality sound, TV and Monitor applications. It include linear volume control, Stand-by and mute functions, the function of each pin and the circuit diagram inside are as follows:...

  • Page 16: Trouble Shooting

    BUFFALO Service Manual 7.Trouble Shooting 7.1 Main board 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 U201 PIN2=2.5V U202 PIN2=3.3V...
  • Page 17 BUFFALO Service Manual No picture (LED orange) No picture The button if under control Check X601 oscillate Correspondent waveform is normal component. Measure U202 PIN2=3.3V Replace U601 U201 PIN2=2.5V Check Correspondent component X401 oscillate waveform is normal Check Correspondent component...

  • Page 18: White Screen

    BUFFALO Service Manual White screen White screen Measure Q204 base is high level? Measure U202 PIN2=3.3V U201 PIN2=2.5V Check Q203 is broken Check Correspondent or CN503 solder? component X401 oscillate waveform is normal Check Correspondent component Check Correspondent component Replace PANEL...

  • Page 19: Pwpc Board

    BUFFALO Service Manual 7.2 PWPC board No Power No power Check AC line volt 110V or 220V Check AC line Check the voltage of C905(+) Check F901, bridge rectified circuit Check start voltage for the pin3 of IC901 Check R906, R907, IC901...
  • Page 20 BUFFALO Service Manual No Backlight Check C223 (+) =12V Check F902 Check D201/Q209/Q210 Check D202/Q211/Q212 Check ON/OFF signal Check Interface board Check U201 pin9=12V voltage Change Q201 or Q207 Check the pin10/Pin7 of U201 have saw tooth Short Q203/Q204 if the picture normal...

  • Page 21: Schematic

    BUFFALO Service Manual 8.SCHEMATIC 8.1 MAIN BOARD TSU16/56AK SCHEMATIC GNDR GNDR GNDG GNDG DDC_CLK VCC1.8 VCC3.3 VAA1 VAA2 VAA3 VAA4 DDC_DAT GNDB GNDB ST_DET1 HSYNC HSYNC VSYNC VSYNC DVI_DET VCC1.8 DDCCI_SEL VCC3.3 VAA1 VAA2 VAA3 CLK+ CLK+ VAA4 CLK- CLK- DDC_WP 3.INPUT...
  • Page 22 BUFFALO Service Manual VCC5V+ VCC5V SOT-252 D202 U201 VCC12V R202 GS1D VCC1.8 VCC12V AZ1117D-1.8 CN201 1/16W 　 VCC1.8 ON_OFF R201 4.7K 　 1/16W C210 C211 C212 VCC12V VCC12V D201 SS14 C201 R212 4.7K 　 1/16W 0.1uF 47uF/16V 0.1uF VCC5V+ VCC5V...
  • Page 23 BUFFALO Service Manual CN301 DB15 FB301 　 1/16W R301 　 1/16W C304 0.047uF FB302 　 1/16W R302 　 1/16W C305 0.047uF FB303 　 1/16W R303 　 1/16W C306 0.047uF R304 　 1/16W C307 0.001uF PC5V R325 C301 C302 C303 VGA_CON 1/16W 　...
  • Page 24 BUFFALO Service Manual VCC3.3 FB401 VCC1.8 FB402 VCC3.3 VCC1.8 600 OHM 600 OHM C405 C414 10uF/16V 10uF/16V VPLL VDVI VDPLL C406 C407 C408 C409 C410 C411 C412 C413 C415 C416 C417 C418 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF...
  • Page 25 BUFFALO Service Manual PA[0..9] PA[0..9] LVA3P CN503 LVA3M LVACKP LVACKM LVB0M RXO0- RXO0+ LVB0P LVA2P LVB1M RXO1- RXO1+ LVB1P LVA2M LVB2M RXO2- RXO2+ LVB2P LVBCKM RXOC- RXOC+ LVBCKP LVA1P LVB3M RXO3- RXO3+ LVB3P LVA1M LVA0M RXE0- RXE0+ LVA0P LVA1M RXE1-...
  • Page 26 BUFFALO Service Manual VCPU VCPU RN602 RN601 R601 R602 C601 R607 　 1/16W 　 1/16W R606 　 1/16W 　 1/16W 0.1uF 　 1/16W 4/2/2004-change Crystal from 20MHz to 24MHz 　 1/16W R644 R645 R646 C602 22pF 　 1/16W U601 X601 P1.0...

  • Page 27: Inverter/Power Board

    BUFFALO Service Manual 8.2 Inverter/Power Board R920 47 1/4W 　 C920 T901 F902 0.001uF/500V FCH10A15 FUSE TO INVERTER F10KQ100 L903 BD901 KBP206G R906 R904 C906 R903 C922 C924 C928 750k 1/4W 　 1M 1/4W 　 0.0015uF/2KV 100K 2W 　 1000uF/16V 1000uF/16V 0.1uF...
  • Page 28 BUFFALO Service Manual CN201 C215 22pF/3KV Q203 L201 CN202 +12V D201 R224 R225 R226 R227 C201 C223 R212 D203 1.5K　 1.5K　 1.5K 1/4W 　 1.5K 1/4W 　 SM240A 1000uF/16V 1000uF/16V C202 C225 3.9K　 RLZ11B C216 Q207 1uF/25V R214 AO4411 22pF/3KV 0.1uF/25V...
  • Page 29 BUFFALO Service Manual 8.3 KEYPAD BOARD CN104 CN102 CN103 PHONEJACK SPK-L SPK-R R101 510 SPKR_R+ CONN CONN R102 510 SPKR_L+ KEY_SEL CN101 KEY_LEFT POWER_ KEY LED_ORANGE KEY RIGHT LED_GRN KEY_MANU KEY_SEL KEY_MANU KEY_RIGHT KEY_LEFT POWER_ KEY LED_ORANGE LED_GRN SPKR_R+ SPKR_L+...
  • Page 30 BUFFALO Service Manual 8.4 AUDIO BOARD OUT_L OUT_R +12V CN202 WAFER 2*7P 2.54mm MUTE VOLUME C202 C201 C203 470uF/16V 470uF/16V 0.1uF U201 TDA7496L CN204 C205 C204 0.47uF R201 18K　 OUTL 470uF/16V C206 0.47uF OUTR R203 18K　 R212 C207 VOLUME 33L8022-3A-H FEMALE 470uF/16V 220　...
  • Page 32 BUFFALO Service Manual 9.BOM LIST T780KA4NJSB1A Location Part No. for TPV Description Quan. Unit AUPC780ML AUDIO BOARD CBPC780KA4MC CONVERSION BOARD KEPC780KMN KEY BOARD FOR T780K*NMV PWPC7425A3M2 POWER BOARD 15G5786 1 VRSA BRACKET 15G5908 2 BRACKET 15G6090 7 MAIN FRAME 34G1272 Y 5L...
  • Page 33 BUFFALO Service Manual Q1G 330 8120 SCREW 3X8mm Q1G 330 10120 SCREW FOR FP/RC Q1G 330 12120 SCREW 3X12mm 705L780KB34 65 BEZEL ASS'Y 750GLU70G01 1 AU 17" V5(V1) PANEL AM1G1740 10120 SCREW(M4*8) T34G1455 Y L BASE AUPC780MCSMT AUDIO BOARD FOR SMT...
  • Page 34 BUFFALO Service Manual C208 67G215Y100 7N KY50VB10M-L 5*11 C211 67G215V470 4N KY25VB47-M-CC3.0 5*11MM C215 67G215V470 4N KY25VB47-M-CC3.0 5*11MM C405 67G215Y100 7N KY50VB10M-L 5*11 C414 67G215Y100 7N KY50VB10M-L 5*11 C419 67G215Y100 7N KY50VB10M-L 5*11 C422 67G215Y100 7N KY50VB10M-L 5*11 C424 67G215Y100 7N...
  • Page 35 BUFFALO Service Manual C312 65G0603221 31 CER1 0603 NP0 50V 220P C313 65G0603104 32 CHIP 0.1UF 50V X7R C401 65G0603104 32 CHIP 0.1UF 50V X7R C402 65G0603390 31 CHIP 39PF 50V NPO C403 65G0603220 31 CER1 0603 NP0 50V 22P P...
  • Page 36 BUFFALO Service Manual C618 65G0603104 32 CHIP 0.1UF 50V X7R C619 65G0603104 32 CHIP 0.1UF 50V X7R D201 93G1004 3 SS14 D202 93G1020 1 S GS1D D301 93G 6433P BAV99 SOT-23 D302 93G 6433P BAV99 SOT-23 D303 93G 6433P BAV99 SOT-23...
  • Page 37 BUFFALO Service Manual R201 61L0603203 CHIPR 20K OHM+-5% 1/10W R202 61L0603103 RST SM 0603 RC0603 10K R203 61L0603102 RST SM 0603 RC0603 1K P R204 61L0603103 RST SM 0603 RC0603 10K R205 61L0603472 RST SM 0603 RC0603 4K7 R207 61L0603472...
  • Page 38 BUFFALO Service Manual R404 61L0603103 RST SM 0603 RC0603 10K R405 61L0603103 RST SM 0603 RC0603 10K R406 61L0603103 RST SM 0603 RC0603 10K R407 61L0603103 RST SM 0603 RC0603 10K R502 61L0603000 RST SM 0603 JUMP MAX 0R R503...

  • Page 39: Key Pad Board

    BUFFALO Service Manual R647 61L0603223 CHIPR 22K OHM +-5% 1/10 R651 61L0603912 CHIPR 9.1KOHM +-5% 1/10 R652 61L0603103 RST SM 0603 RC0603 10K RN601 61L 125103 8 CHIP AR 8P4R 10KOHM +-5 RN602 61L 125103 8 CHIP AR 8P4R 10KOHM +-5...
  • Page 40 BUFFALO Service Manual C902 65L305M2222E3 2200PF+-20%400VAC BY TD C904 63G 107474 HS 0.47UF +-20% 275VAC C906 65G 2K152 5E6921 1500 PF 10% 2KV Y5P C913 65G306M4722BP 4700PF +-20% 400VAC C922 67G215V102 3N GP KY10VB1000M-CC3 10*16 C924 67G215V102 3N GP KY10VB1000M-CC3 10*16...
  • Page 41 BUFFALO Service Manual C211 65G0805105 27 CHIP 1UF Y5V 0805 C212 65G0805105 27 CHIP 1UF Y5V 0805 C219 65G0805105 27 CHIP 1UF Y5V 0805 C220 65G0805105 27 CHIP 1UF Y5V 0805 C224 65G0805105 27 CHIP 1UF Y5V 0805 C225 65G0805105 27...
  • Page 42 BUFFALO Service Manual R906 61L1206754 CHIP 750KOHM 5% 1/4W R907 61L1206754 CHIP 750KOHM 5% 1/4W R909 61L1206472 CHIP 4.7KOHM 5% 1/4W R910 61L1206472 CHIP 4.7KOHM 5% 1/4W R911 61L1206472 CHIP 4.7KOHM 5% 1/4W R912 61L1206101 CHIP 100 OHM 5% 1/4W...
  • Page 43 BUFFALO Service Manual D205 93G 64 1152T 1N4148 D206 93G 64 1152T 1N4148 D207 93G 64 1152T 1N4148 D208 93G 64 1152T 1N4148 D209 93G 64 1152T 1N4148 D210 93G 64 1152T 1N4148 D901 93G 6026T52T RECTIFIER DIODE FR107 D902...
  • Page 44 BUFFALO Service Manual R237 61G 60262152T 620 OHM 5% 1/6W R238 61G 60212352T 12KOHM 5% 1/6W R239 61G 60212352T 12KOHM 5% 1/6W R240 61G 60251352T 51KOHM +-5% 1/6W R241 61G 60251352T 51KOHM +-5% 1/6W R243 61G 17210252T 1K OHM 5% 1/4W...
  • Page 45 BUFFALO Service Manual T780KA4NJSB2A Location Part No. for TPV Description Quan. Unit AUPC780ML AUDIO BOARD CBPC780KA4MC CONVERSION BOARD KEPC780KMN KEY BOARD FOR T780K*NMV PWPC7425A3M2 POWER BOARD 15G5786 1 VRSA BRACKET 15G5908 2 BRACKET 15G6090 7 MAIN FRAME 34G1272 GM 5L...

  • Page 46: Audio Board

    BUFFALO Service Manual Q1G 330 10 47 SCREW Q1G 330 12 47 SCREW 705L780KB34 66 BEZEL ASS'Y 750GLU70G01 1 AU 17" V5(V1) PANEL AM1G1740 10 47 SCREW T34G1455 GM L BASE AUPC780MCSMT AUDIO BOARD FOR SMT 12G6051 1 RUBBER FOOOT...
  • Page 47 BUFFALO Service Manual C211 67G215V470 4N KY25VB47-M-CC3.0 5*11MM C215 67G215V470 4N KY25VB47-M-CC3.0 5*11MM C405 67G215Y100 7N KY50VB10M-L 5*11 C414 67G215Y100 7N KY50VB10M-L 5*11 C419 67G215Y100 7N KY50VB10M-L 5*11 C422 67G215Y100 7N KY50VB10M-L 5*11 C424 67G215Y100 7N KY50VB10M-L 5*11 C427 67G215Y100 7N...
  • Page 48 BUFFALO Service Manual C313 65G0603104 32 CHIP 0.1UF 50V X7R C401 65G0603104 32 CHIP 0.1UF 50V X7R C402 65G0603390 31 CHIP 39PF 50V NPO C403 65G0603220 31 CER1 0603 NP0 50V 22P P C404 65G0603104 32 CHIP 0.1UF 50V X7R...
  • Page 49 BUFFALO Service Manual C619 65G0603104 32 CHIP 0.1UF 50V X7R D201 93G1004 3 SS14 D202 93G1020 1 S GS1D D301 93G 6433P BAV99 SOT-23 D302 93G 6433P BAV99 SOT-23 D303 93G 6433P BAV99 SOT-23 D304 93G 64 42 P BAV70 SOT-23...
  • Page 50 BUFFALO Service Manual R202 61L0603103 RST SM 0603 RC0603 10K R203 61L0603102 RST SM 0603 RC0603 1K P R204 61L0603103 RST SM 0603 RC0603 10K R205 61L0603472 RST SM 0603 RC0603 4K7 R207 61L0603472 RST SM 0603 RC0603 4K7 R208...
  • Page 51 BUFFALO Service Manual R405 61L0603103 RST SM 0603 RC0603 10K R406 61L0603103 RST SM 0603 RC0603 10K R407 61L0603103 RST SM 0603 RC0603 10K R502 61L0603000 RST SM 0603 JUMP MAX 0R R503 61L0603222 RST SM 0603 RC0603 2K2 R601...
  • Page 52 BUFFALO Service Manual R651 61L0603912 CHIPR 9.1KOHM +-5% 1/10 R652 61L0603103 RST SM 0603 RC0603 10K RN601 61L 125103 8 CHIP AR 8P4R 10KOHM +-5 RN602 61L 125103 8 CHIP AR 8P4R 10KOHM +-5 U201 56G 563 31 AI1117D-1.8-EI U202...
  • Page 53 BUFFALO Service Manual C904 63G 107474 HS 0.47UF +-20% 275VAC C906 65G 2K152 5E6921 1500 PF 10% 2KV Y5P C913 65G306M4722BP 4700PF +-20% 400VAC C922 67G215V102 3N GP KY10VB1000M-CC3 10*16 C924 67G215V102 3N GP KY10VB1000M-CC3 10*16 C925 67G215V102 3N GP...
  • Page 54 BUFFALO Service Manual C212 65G0805105 27 CHIP 1UF Y5V 0805 C219 65G0805105 27 CHIP 1UF Y5V 0805 C220 65G0805105 27 CHIP 1UF Y5V 0805 C224 65G0805105 27 CHIP 1UF Y5V 0805 C225 65G0805105 27 CHIP 1UF Y5V 0805 C910 65G0805104 32 CHIP 0.1U 50V X7R...
  • Page 55 BUFFALO Service Manual R907 61L1206754 CHIP 750KOHM 5% 1/4W R909 61L1206472 CHIP 4.7KOHM 5% 1/4W R910 61L1206472 CHIP 4.7KOHM 5% 1/4W R911 61L1206472 CHIP 4.7KOHM 5% 1/4W R912 61L1206101 CHIP 100 OHM 5% 1/4W R915 61L1206103 CHIP 10KOHM 5% 1/4W...
  • Page 56 BUFFALO Service Manual D206 93G 64 1152T 1N4148 D207 93G 64 1152T 1N4148 D208 93G 64 1152T 1N4148 D209 93G 64 1152T 1N4148 D210 93G 64 1152T 1N4148 D901 93G 6026T52T RECTIFIER DIODE FR107 D902 93G 6038T52T FR103 D903 93G 64 1152T...
  • Page 57 BUFFALO Service Manual R238 61G 60212352T 12KOHM 5% 1/6W R239 61G 60212352T 12KOHM 5% 1/6W R240 61G 60251352T 51KOHM +-5% 1/6W R241 61G 60251352T 51KOHM +-5% 1/6W R243 61G 17210252T 1K OHM 5% 1/4W R244 61G 17210252T 1K OHM 5% 1/4W...

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