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SERVICE MANUAL
FTD-G931AS
FTD-G931AS/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.
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Table of Contents
Related Manuals for Buffalo FTD-G931AS
Summary of Contents for Buffalo FTD-G931AS
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Page 1: Service Manual
SERVICE MANUAL FTD-G931AS FTD-G931AS/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... -
Page 2: Table Of Contents
BUFFALO FTD-G931AS/BK Table of Contents Table of Contents ----------------------------------------------------------------------------------------------------------- 02 Revision List ------------------------------------------------------------------------------------------------------------------03 1. Monitor Specification ---------------------------------------------------------------------------------------------------04 2. LCD Monitor Description -----------------------------------------------------------------------------------------------05 3. Operation Instructions --------------------------------------------------------------------------------------------------06 3.1 General Instructions ------------------------------------------------------------------------------------------------06 3.2 Operation Instructions ----------------------------------------------------------------------------------------------06 3.3 Adjusting The Picture -----------------------------------------------------------------------------------------------07 4. Input/Output Specification ---------------------------------------------------------------------------------------------09 4.1 Input Signal Connector ---------------------------------------------------------------------------------------------09... -
Page 3: Revision List
BUFFALO FTD-G931AS/BK Revision List Revision Date Change Description Nov-01-04 T980KAXNJSB1A Mar.-14-06 T980KA4NJSB1A/T980KA4NJSB2A... -
Page 4: Monitor Specification
BUFFALO FTD-G931AS/BK 1.MONITOR SPECIFICATIONS Driving system TFT LCD Size 19.0"(48.18cm) Horizontal: 376.32mm Active Area Vertical: 301.056mm Panel AU M190EN03 Pixel pitch 0.294mm(H) x 0.294mm(V) LCD Panel Viewing angle 170(H) 170(V) (CR>10) Luminance 250 cd/m (typ) Contrast Ratio 800:1 (typ) Response time... -
Page 5: Lcd Monitor Description
BUFFALO FTD-G931AS/BK 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: Operation Instructions
BUFFALO FTD-G931AS/BK 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 FTD-G931AS/BK 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 FTD-G931AS/BK 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...
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Page 9: Input/Output Specification
BUFFALO FTD-G931AS/BK 4. INPUT/OUTPUT SPECFICATION 4.1 INPUT SIGNAL CONNECTOR PIN NO. DESCRIPTION PI N 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: Power Supply Requirements
BUFFALO FTD-G931AS/BK 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 (MHz) DOS* 720x400@70Hz 900 x 449 31.469... -
Page 11: Panel Specification
BUFFALO FTD-G931AS/BK 4.4 Panel Specification 4.4.1 General Feature... - Page 12 BUFFALO FTD-G931AS/BK 4.4.2 Optical Characteristics 4.4.3 Electrical Characteristics...
- Page 13 BUFFALO FTD-G931AS/BK...
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Page 14: Software Flow Chart
BUFFALO FTD-G931AS/BK 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 15: Circuit Description
BUFFALO FTD-G931AS/BK 6. Circuit Diagram BLOCK DIAGRAM Main Board Scalar TSU16AK (Include ADC, OSD) EPR_SDA EPR_SCL H sync EEPROM V sync M24C16 DB15_SDA D-Sub EEPROM DB15_SCL Connector M24C02 PWPC Board AC input Bridge Rectifier Transformer Rectifier CMOS EMI filter and Filter... -
Page 16: Trouble Shooting
BUFFALO FTD-G931AS/BK 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=1.8V U202 PIN2=3.3V... - Page 17 BUFFALO FTD-G931AS/BK No picture The button if under control Check X601 oscillate Correspondent waveform is normal component. Measure U202 PIN2=3.3V Replace U601 U201 PIN2=1.8V Check Correspondent component X401 oscillate waveform is normal Check Correspondent component. Replace U401 White screen...
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Page 18: Pwpc Board
BUFFALO FTD-G931AS/BK White screen Measure Q204 base is high level? Measure U202 PIN2=3.3V U201 PIN2=1.8V Check Q203 is broken Check Correspondent or CN503 solder? component X401 oscillate waveform is normal Check Correspondent component Check Correspondent component Replace PANEL Replace U401 7.2 PWPC board... - Page 19 BUFFALO FTD-G931AS/BK 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 Check the auxiliary voltage is between 10V-16V...
- Page 20 BUFFALO FTD-G931AS/BK 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 Q202 Check the pin10/Pin7 of U201 have saw tooth Short Q203/Q204 if the picture normal Replace U201 Connect PIN15 of U201 to the ground and check...
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Page 21: Schematic
BUFFALO FTD-G931AS/BK 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 FTD-G931AS/BK 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 VCC5V...
- Page 23 BUFFALO FTD-G931AS/BK 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 ...
- Page 24 BUFFALO FTD-G931AS/BK 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 0.1uF...
- Page 25 BUFFALO FTD-G931AS/BK 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 RXO3- RXO3+ LVB3M LVB3P LVA1M LVA0M RXE0- RXE0+ LVA0P LVA1M RXE1- RXE1+...
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Page 26: Inverter/Power Board
BUFFALO FTD-G931AS/BK 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 P1.1... - Page 27 BUFFALO FTD-G931AS/BK R919 47_1/2W_M R920 C913 47_1/2W_M 102P_500V +12V D910 SRF20100C L903 T901 73L-253-91L F902 TRANSFORMER 5A/24V/1206 V12A BD901 R906 R904 C906 R903 U4KB8R 1M/1206 1M/1206 152P/1KV 100K_2W C916 D911 C914 C915 470UF/16V C905 SRF20100C 1000UF/16V 1000UF/16V C917 100uF/450V 0.1UF/0805/Y5V...
- Page 28 BUFFALO FTD-G931AS/BK J201 JUMPER1 CN201 C215 22pF/6KV Q203 V12A L201 120UH C216 CN202 22pF/6KV C201 C202 D201 R224 R230 470uF/16V R214 R212 D203 1K 1K 0.1uF/25V SM240A C225 3.9K BZT52 Q202 1uF/25V 2.2K 1/16W AO4411 PT201 DTC144WKA R220...
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Page 29: Key Pad Board
BUFFALO FTD-G931AS/BK FB105 150OHM FB103 150 OHM CN104 SPKR_L+ CN103 SPKR_R+ C101 56p CN102 SPKR_L- PHONEJACK SPKR_R- HP/SPKR# FB106 150 OHM CONN CONN FB104 150 OHM FB101 150 OHM C109 C110 HP_R C112 C111 C102 C103 FB102 150 OHM HP_L... - Page 30 BUFFALO FTD-G931AS/BK ROUT+ CN102 ROUT- ROUT- ROUT+ LOUT- LOUT+ C127 CN103A PHONE_RIGHT WAFER 4P2.0 R/A MODE C125 C126 R104 0.001uf/50v PHONE_RIGHT PHONE_LEFT 0.001uF/1nf 0.001uF/1nf WAFER 4P2.0 R/A L103 L104 300 OHM 300 OHM C124 +12V +12V AVDD PHONE_RIGHT 10uF PHONE_LEFT...
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Page 31: Audio Board
BUFFALO FTD-G931AS/BK 9.BOM LIST The different parts of T980KA4NJSB1A & T980KA4NJSB2A Part No. for TPV Description Quantity Unit TPV model 34G1276 Y 4L BACK COVER T980KA4NJSB1A 34G1276 GM 4L BACK COVER T980KA4NJSB2A 40G 191894 1A ID LABEL T980KA4NJSB1A 40G 191894 2A... - Page 32 BUFFALO FTD-G931AS/BK 40G 58162435A LABEL 40G 581689 4A SERIAL LABEL FOR MONITO 40G 581894 2A BLUE DOT 41G7800894 4A INSTALL MANUAL 44G3231 15 EVA WASHER 44G3231 15506 EVA WASHER 44G3910 5 U TYPE SHEET 44G3920 1 EPS(L) 44G3920 2 EPS(R)
- Page 33 BUFFALO FTD-G931AS/BK C103 65G0603104 12 CER2 0603 X7R 16V 100N C105 65G0603105 17 1UF 16V Y5V C106 65G0603105 17 1UF 16V Y5V C107 65G0603105 17 1UF 16V Y5V C108 65G0603105 17 1UF 16V Y5V C109 65G0603105 17 1UF 16V Y5V...
- Page 34 BUFFALO FTD-G931AS/BK L113 71G 59B121 TB160808B L114 71G 59B121 TB160808B R106 61L0603000 RST SM 0603 JUMP MAX 0R R107 61L0603124 CHIP 120KOHM 1/10W R110 61L0603102 RST SM 0603 RC0603 1K P R112 61L0603000 RST SM 0603 JUMP MAX 0R R113 61L0603682 CHIP 6.8K OHM 1/10W...
- Page 35 BUFFALO FTD-G931AS/BK CN301 88G 35315F H D-SUB 15PIN CN503 33G802724B H WAFER CN601 33G8027 14 WAFER 14P 2.0MM DIP DUA CN602 33G8027 16 WAFER 16PIN 2.0mm DIP X401 93G 22 53 CRYSTAL 14.318MHzHC-49U X601 93G 22 45 H 24MHZ/30PF/49US 40G 457624 1B...
- Page 36 BUFFALO FTD-G931AS/BK C413 65G0603104 32 CHIP 0.1UF 50V X7R C415 65G0603104 32 CHIP 0.1UF 50V X7R C416 65G0603104 32 CHIP 0.1UF 50V X7R C417 65G0603104 32 CHIP 0.1UF 50V X7R C418 65G0603104 32 CHIP 0.1UF 50V X7R C420 65G0603104 32 CHIP 0.1UF 50V X7R...
- Page 37 BUFFALO FTD-G931AS/BK D323 93G 39147 TZMC5V6 D324 93G 6433P BAV99 SOT-23 D601 93G 6432V LL4148-GS08 FB202 71G 56Z601 CHIP BEAD 600 OHM 0805 FB301 61L0603000 RST SM 0603 JUMP MAX 0R FB302 61L0603000 RST SM 0603 JUMP MAX 0R FB303...
- Page 38 BUFFALO FTD-G931AS/BK R305 61L0603101 RST SM 0603 RC0603 100R R306 61L0603101 RST SM 0603 RC0603 100R R307 61L0603101 RST SM 0603 RC0603 100R R308 61L0603103 RST SM 0603 RC0603 10K R309 61L0603101 RST SM 0603 RC0603 100R R310 61L0603102 RST SM 0603 RC0603 1K P...
- Page 39 BUFFALO FTD-G931AS/BK R613 61L0603103 RST SM 0603 RC0603 10K R614 61L0603103 RST SM 0603 RC0603 10K R615 61L0603103 RST SM 0603 RC0603 10K R616 61L0603472 RST SM 0603 RC0603 4K7 R617 61L0603121 CHIPR 120 OHM 1/10W R618 61L0603121 CHIPR 120 OHM 1/10W...
- Page 40 BUFFALO FTD-G931AS/BK GND1 95G 900 57 WIRE HARNESS GND2 95G 900 57 WIRE HARNESS SW101 77L 600 1GHJ KEY SWITCH SW102 77L 600 1GHJ KEY SWITCH SW103 77L 600 1GHJ KEY SWITCH SW104 77L 600 1GHJ KEY SWITCH SW105 77L 600 1GHJ...
- Page 41 BUFFALO FTD-G931AS/BK C215 65G 3J2206ET 22PF 5% SL 3KV TDK C216 65G 3J2206ET 22PF 5% SL 3KV TDK C217 65G 3J2206ET 22PF 5% SL 3KV TDK C218 65G 3J2206ET 22PF 5% SL 3KV TDK C223 67G215V471 3N GP KY16VB470M-CC3 10*12.5...
- Page 42 BUFFALO FTD-G931AS/BK R226 61G 208102 64 1KOHM 5% 1W R228 61G 208102 64 1KOHM 5% 1W R230 61G 208102 64 1KOHM 5% 1W T901 80LL19T 3 TG TRANSFORMER PWPC1942AUM2AI POWER BOARD FOR AI C102 65G0805104 32 CHIP 0.1U 50V X7R...
- Page 43 BUFFALO FTD-G931AS/BK L308 71G 59B601 EA CHIP BEAD 600 OHM L309 71G 59B601 EA CHIP BEAD 600 OHM Q101 57G 763 3 AO4411 SO-8 Q102 57G 417 4 PMBS3904/PHILIPS-SMT(04 Q103 57G 417 6 PMBS3906/PHILIPS-SMT(06 Q201 57G 760 5A DTC 144WN3/S SOT-23...
- Page 44 BUFFALO FTD-G931AS/BK R908 61L1206519 CHIPR 5.1OHM +-5% 1/4W R910 61L1206000 RST SM 1206 JUMP MAX 0R R911 61L0805240 2F CHIP 24KOHM 1% 1/8W R912 61L0805203 CHIPR 20KOHM +-5% 1/8W R916 61L0805472 CHIRP 4.7K OHM +-5% 1/8 R917 61L0805101 CHIPR 100 OHM +-5% 1/8W...
- Page 45 BUFFALO FTD-G931AS/BK D210 93G 64 1152T 1N4148 FB101 71G 55 29 FERRITE BEAD FB901 71G 55 29 FERRITE BEAD IC903 56G 158 4 T H431BA L901 6G 31502 1.5MM RIVET L902 6G 31502 1.5MM RIVET NR901 6G 31502 1.5MM RIVET...
- Page 46 BUFFALO FTD-G931AS/BK T901 6G 31502 1.5MM RIVET R903 61G152M10458F 100K OHM 5% 2W 90G 415 1 HEATSHINK FOR Q901 M1G1730 8128 SCREW M3x8 Q901 57G 724 4A STP9NK60ZEP 96G 29 6 SHRINK TUBE UL/CSA R914 61G 2J22858H 0.22OHM 2W +-5%...