Buffalo BU1715 SERVICE MANUAL 17” LCD Monitor BU1715 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.
Buffalo BU1715 Table of Contents Table of Contents Revision List ------------------------------------------------------------------------------------------------------------------ 02 ---------------------------------------------------------------------------------------------------------------------03 1. Monitor Specification -------------------------------------------------------------------------------------------------------------04 2.
Buffalo BU1715 Revision List Revision Date Change Description A00 Jul-18-05 Initial release 3
Buffalo BU1715 1. Monitor Specifications Driving system TFT Color LCD Panel M170EG01 Size 43.2 cm (17.0") Pixel pitch 0.264mm(H) x 0.264mm(V) Viewable angle 140° (H) 130° (V) Response time 16 ms (typ.) Video R, G, B Analog Interface Separate Sync. H/V TTL H-Frequency 24kHz – 80kHz V-Frequency 55Hz-75Hz LCD Panel Input Display Colors 16.2M Colors Dot Clock 135MHz(max.) Max.
Buffalo BU1715 2. LCD Monitor Description The LCD MONITOR will contain a main board, an inverter/power board, an audio board and a 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. Monitor Block Diagram Flat Panel and CCFL Drive.
Buffalo BU1715 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. -The power cord should be connected. -Connect the video cable from the monitor to the video card. -Press the power button to turn on the monitor, the power indicator will light up. 3.2 Operating Instructions NO.
Buffalo BU1715 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. 4. Press MENU button to enter, and press Left button or Right button to adjust item you select. 5. Press EXIT button may back previous menu. 6.
Buffalo BU1715 Main Menu Item Sub Menu Item Sub Menu Icon Auto Color Description Auto adjust color Color Temp Recall Color Temperature from EEPROM Red Setting Red Gain from Digital-register Green Setting Green Gain from Digital-register Blue Gain from Digital-register Blue Setting Volume Audio adjustment Mute Audio prohibition Sound OSD language selection OSD language (English or Japanese) OSD H-Position Adjust the horizontal position of the OSD OSD V-Position Adjust the vertical po
Buffalo BU1715 4. Input Specification 4.1 Input Signal Connector PIN NO. Description PIN NO. Description 1. Red 9. +5V 2. Green 10. Detect Cable 3. Blue 11. NC 4. Ground 12. DDC-Serial Data 5. Ground 13. H-Sync 6. R-Ground 14. V-Sync 7. G-Ground 15. DDC-Serial Clock 8.
Buffalo BU1715 4.2 Factory Present Display Modes VESA MODES Horizontal Mode Resolution Total Vertical Nominal Sync Nominal Sync Frequency Polarity Freq. Polarity +/- 0.5kHz VGA SVGA XGA MAC SXGA +/- 1 Hz Nominal Pixel Clock (MHz) 640x480@60Hz 800 x 525 31.469 N 59.940 N 25.175 640x480@72Hz 832 x 520 37.861 N 72.809 N 31.500 640x480@75Hz 840 x 500 37.500 N 75.00 N 31.500 800x600@56Hz 1024 x 625 35.156 N/P 56.250 N/P 36.000 800x600@60Hz 1056 x 628 37.
Buffalo BU1715 4.3 Power Supply Requirement NO. Parameter Description 1 A/C Line voltage range 100 V ~ 240 V 2 A/C Line frequency range 50 ± 3Hz, 60 ± 3Hz 3 Input Voltage transients 280 volts AC for 10 sec @40℃ 4 Current 1.5A max at 100V; 0.8A max at 240 V 5 Peak surge current 6 Leakage current 7 Power line surge < 60A peak at 240 VAC and cold starting < 30A peak at 120VAC and cold starting < 3.
Buffalo BU1715 4.4 Panel Specification 4.4.1 Panel Feature 4.4.
Buffalo BU1715 4.4.
Buffalo BU1715 4.4.
Buffalo BU1715 5. Block Diagram 5.
Buffalo BU1715 5.
Buffalo BU1715 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. 9) Save the power key status into EEPROM. Turn on the LED and set it to green color. Scalar initializes. 10) In standby mode? 11) Update the lifetime of back light.
Buffalo BU1715 5.3 Electrical Block Diagram 5.3.1 Scaler Board Block Diagram LCD Interface (CN503) OSD Control KEY PAD Scalar TSU16AK PQFP-128 20MHz MCU (Include ADC, OSD) CRYSTAL MTV512MV (U401) (U601) EPR_SDA H sync EPR_SCL V sync 14.
Buffalo BU1715 5.3.
Power Block Diagram 20 Buffalo BU1715
Buffalo BU1715 6.Schematic Diagram 6.1 Main Board TSU16AK SCHEMATIC B2 B1 TXD RXD DDC_CLK DDC_DAT ST_DET1 DVI_DET RIN GNDR GIN GNDG SOG BIN GNDB HSYNC VSYNC RIN GNDR GIN GNDG SOG BIN GNDB HSYNC VSYNC VCC1.8 VCC3.3 VAA1 VAA2 VAA3 VAA4 VCC1.8 DDCCI_SEL VCC3.3 R+ RG+ GB+ BCLK+ CLKDDC_WP R+ RG+ GB+ BCLK+ CLK- VAA1 VAA2 VAA3 VAA4 3.
Buffalo BU1715 VCC5V+ VCC5V SOT-252 D202 R202 6 CN201 R201 4.7K 1/16W VI C210 D201 SS14 C201 VCC5V+ VCC5V VCC5V 0.1uF 3,4,6 R212 4.7K B Q201 PMBS3904 1/16W VO 0.1uF VCC1.8 2 VCC1.8 C211 4 C212 + 47uF/16V 0.1uF 1 ON_OFF DIM VCC12V GND VCC5V GND 2 4 6 8 10 12 C 1 3 5 7 9 11 3 1/16W AZ1117D-1.8 onBACKLITE 6 E GND GND VCC12V GND VCC5V GND 10K U201 GS1D GND VCC12V VCC12V C VCPU FB201 NC CONN VCPU B 6 E VCC5V C202 C203 + R203 1K 1/16W C204 + 220uF/25V 0.
R301 33 1/16W C304 0.047uF 1/16W R302 33 1/16W C305 0.047uF FB303 0 1/16W R303 33 1/16W C306 0.047uF R304 470 R305 68 1/16W C308 0.047uF R306 68 1/16W C309 0.047uF R307 68 1/16W C310 0.047uF PC5V VGA_CON 75 R325 C301 1/16W NC C302 NC C303 D301 BAV99 3 3 3 4/2/2004-Add R329,R330 TZMC5V6-GS08 NC D302 BAV99 D303 BAV99 4 BIN 4 SOG 4 GNDR 4 GNDG 4 GNDB 4 VCC5V R308 10K VCC5V 1/16W 1 1 2 1 1/16W C307 0.
Buffalo BU1715 VCC3.3 FB401 2 VCC3.3 VPO 600 OHM 3 3 3 3 3 3 3 3 VDVI 40 41 43 44 46 47 49 50 52 R+ RG+ GB+ BCLK+ CLKR403 390 1/16W 66 C401 0.1uF 67 RIN0 RIN0M GIN0 GIN0M SOGIN0 BIN0 BIN0M HSYNC0 VSYNC0 DDC1_CLK/GPO8 DDC1_DAT/GPO7 VCC1.8 VDD 600 OHM C414 10uF/16V + VDD + C406C407C408C409C410C411C412C413 0.1uF0.1uF0.1uF0.1uF0.1uF0.1uF0.1uF0.1uF C415C416C417C418 0.1uF0.1uF0.1uF0.
Buffalo BU1715 4 4 PA[0..9] PB[0..9] PA[0..9] PB[0..
Buffalo BU1715 VCPU 2 VCPU VCPU MAX810STR (NC) RST 10 D601 4 1/16W 12 14 INT 33 32 17 2 3 4 5 6 7 8 9 VCPU 0.1uF R604 10K R605 10K U602 1 2 3 4 A0 A1 A2 GND VCC WP SCL SDA 8 7 6 5 R652 10K AT24C16N-10SC-2.7 1/16W R639 R638 1/16WR608 1/16WR609 100 NC CN601 VCC12V FB602 600 OHM VCC5V R627 R626 C612 0.1uF 0.1uF 1/16W XTAL2 RESET P6.0 P6.1 P6.2 P6.3 P6.4 P6.5 P6.6 P6.7 T0/P3.4 P7.6/CLKO INT1/P3.3 P7.7 NC INT0/P3.2 ALE/P VSYNC T1/P3.5 P5.0 P5.1 P5.2 P5.3 P5.4 P5.5 P5.6 P5.
Buffalo BU1715 6.2 Power/Inverter Board R920 47 1/2W C920 T901 4 1 O + BD901 2KBP06M 3 + C905 100uF/400V R904 C906 R903 1M 1/4W 0.0015uF/2KV 100K 9 R905 1M 1/4W D902 PS102R 2 R907 750k 1/4W 3 3 C907 22uF FB901 C912 NC 2 1 10,11 + C925 1000uF/16V + C926 470uF/16V FB902 BEAD C927 0.1uF C913 0.0047uF/250V ZD902 HZ12B2 IC902 PC123FY2 4P 3 R909 4.7K 1/16W ZD901 RLZ20B R912 100 1/16W R913 NC CONN C909 0.1uF R927 1K 1/10W R910 4.7K 1/16W Q901 2PA733P C910 0.
Buffalo BU1715 TP1 HVO TP3 HVL TP4 HVL 1 1 1 CN201 C215 22pF/6KV 2 Q203 C225 1uF/25V Q202 0.1uF/25V DTA144WKA R243 1K 1/4W Q201 NO/OFF SR24 SI4431DY-T1 Q205 R216 220 1/16W MPS3904 DTC144WKA 3 D203 RLZ11B R224 1.5K R225 1.5K R220 15K C211 1uF/25V R202 10K C213 0.22uF/160V R208 4.7K 1/16W R205 47K MPS3906 R210 15K 1N4148 R240 51K R236 620 1 TP5 HVL 1 TP6 HVL R219 100 Q206 MPS3904 1 2 D202 SR24 SI4431DY-T1 R217 220 1/16W D204 RLZ11B R228 1.5K R229 1.5K R230 1.
Buffalo BU1715 6.3 Audio Board OUT_LOUT_R CN202 WAFER 2*7P 2.54mm R203 C206 0.47uF 10K 9 R212 33L8022-3A-H FEMALE 6 11 220K C211 100 pF R210 R211 5.6K GND 5.6K 12 GND C212 100 pF + C209 1.0uF + C210 1.0uF C213 0.1uF GND 15 CN203 + INL OUTL INR OUTR SVR VOLUME STBY VAROUT_R MUTE VAROUT_L GND 29 C205 VS 16 8 4 GND 17 4 3 2 1 470uF/16V 14 + 10K U201 TDA7496L C203 0.1uF 10 C207 470uF/16V 7 5 C208 470uF/16V + GND R207 R208 1K R201 C204 0.
Buffalo BU1715 6.
Buffalo BU1715 7. PCB Layout 7.
Buffalo BU1715 32
Buffalo BU1715 7.
Buffalo BU1715 34
Buffalo BU1715 35
Buffalo BU1715 7.3 Audio Board 7.
Buffalo BU1715 8. Maintainability 8.1 Tools And Requirement 1. Voltmeter. 2. Oscilloscope. 3. Pattern Generator. 4. LCD Color Analyzer. 5. Service Manual. 6. User Manual.
Buffalo BU1715 8.2 Trouble Shooting 8.2.1 Main Board 1.No Screen Appear Measured CN201 pin5/6 = 12 V? Check Correspondent component. Measured CN201 pin 9/10= 5V? Is there any shortage or cold solder? Measured U202 pin 2= 3.3V? Yes. There have OSD show Yes, all DC level exist Disconnected the Signal cable (Loose the Connected the Signal cable again, Signal cable), Is the screen show “Cable Not Check LED status.
Buffalo BU1715 2. Panel Power Circuit NG Check R207 should have response from 0V to 5V Measured X601 waveform is normal? When we switch the power switch from off to on NG OK Replace X601 OK Check Q204, Q203 is broken or CN503 solder abnormal? Replace U601 NG Replace Q204, Q203 or re-solder CN503 OK Replace Panel 3.
Buffalo BU1715 4. U401-Data Output Check TSU16AK (U401) NG Signal output (PIN102-103, Measured X401 waveform is 106-113,118-125,128,1) normal? Is the waveform ok? NG Replace X401 OK Replace U401 OK OK Check HS/VS input signal are normal? NG Check relative component 8.2.
Buffalo BU1715 8.2.3 Power/Inverter Board 1.
Buffalo BU1715 2.) W / LED, No Backlight Check C201 (+) =12V OK NG Check D201/Q209/Q210 Check ON/OFF signal NG Check Interface board OK Check U201 pin9=12V voltage of C905(+) NG Change Q201 or Q202 OK Check the pin1 of U201 have saw tooth wave NG Change U201 OK Check D201 (-), D202 (-) has the output of square wave at short time.
Buffalo BU1715 9. White- Balance, Luminance Adjustment Approximately 2 Hours should be allowed for warm up before proceeding White-Balance adjustment. Before started adjust white balance, please setting the Chroma-7120 MEM. Channel 9 to 93000K colors; MEM. Channel 10 to 75000K; MEM. Channel 11 to 65000K colors; MEM. Channel 3 to SRGB.
Buffalo BU1715 24. Repeat above procedure (item 5,6,7) until chroma 7120 RGB value meet the tolerance =100±2 c. Adjust sRGB (65000K) color-temperature 1. Switch the chroma-7120 to RGB-mode (with press “MODE” button) 2. Switch the MEM.channel to Channel 01 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show 6500 parameter is x = 313, y = 329, Y = 180 ± 20 cd/m2 4. In sRGB sub-menu, adjust C to 85,adjust L to 100, 5.
Buffalo BU1715 10.
Buffalo BU1715 11.
Buffalo BU1715 Q1G 330 8120 SCREW 3X8mm 2 PCS Q1G 330 10120 SCREW FOR FP/RC 1 PCS Q1G 330 12120 SCREW 3X12mm 2 PCS 705L780KB34 65 BEZEL ASS'Y 1 PCS 750GLU70G01 1 AU 17" V5 (V1) PANEL 1 PCS AM1G1740 10120 SCREW (M4*8) 4 PCS AUPC780MCSMT AUDIO BOARD FOR SMT 1 PCS 12G6051 1 RUBBER FOOOT 1 PCS 33G802414C H 2*7PIN DUAL ROW RIGHT A 1 PCS 56G 616 1 TDA7496 1 PCS 95G8014 3503 WIRE HARNESS 1 PCS AUPC780MCAI AUDIO BOARD FOR AI 1 PCS R207 61L0603102 RST SM 0603 RC0603
Buffalo BU1715 C202 67G215V221 4N KY25VB220-M-CC3 8*11.5M 1 PCS C204 67G215V221 4N KY25VB220-M-CC3 8*11.5M 1 PCS C211 67G215V470 4N KY25VB47-M-CC3.0 5*11MM 1 PCS C215 67G215V470 4N KY25VB47-M-CC3.
Buffalo BU1715 R305 61L0603101 RST SM 0603 RC0603 100R 1 PCS R306 61L0603101 RST SM 0603 RC0603 100R 1 PCS R307 61L0603101 RST SM 0603 RC0603 100R 1 PCS R309 61L0603101 RST SM 0603 RC0603 100R 1 PCS R312 61L0603101 RST SM 0603 RC0603 100R 1 PCS R315 61L0603101 RST SM 0603 RC0603 100R 1 PCS R316 61L0603101 RST SM 0603 RC0603 100R 1 PCS R341 61L0603101 RST SM 0603 RC0603 100R 1 PCS R342 61L0603101 RST SM 0603 RC0603 100R 1 PCS R402 61L0603101 RST SM 0603 RC0603 1
Buffalo BU1715 R614 61L0603103 RST SM 0603 RC0603 10K 1 PCS R615 61L0603103 RST SM 0603 RC0603 10K 1 PCS R625 61L0603103 RST SM 0603 RC0603 10K 1 PCS R626 61L0603103 RST SM 0603 RC0603 10K 1 PCS R627 61L0603103 RST SM 0603 RC0603 10K 1 PCS R644 61L0603103 RST SM 0603 RC0603 10K 1 PCS R645 61L0603103 RST SM 0603 RC0603 10K 1 PCS R646 61L0603103 RST SM 0603 RC0603 10K 1 PCS R652 61L0603103 RST SM 0603 RC0603 10K 1 PCS R617 61L0603121 CHIPR 120 OHM 1/10W 1 PCS
Buffalo BU1715 R327 61L0603750 RST SM 0603 RC22H 75R P 1 PCS R651 61L0603912 CHIPR 9.1KOHM +-5% 1/10 1 PCS C617 65G0603101 32 100PF +-10% 50V X7R 1 PCS C307 65G0603102 32 1000PF +-10% 50V X7R 1 PCS C606 65G0603102 32 1000PF +-10% 50V X7R 1 PCS C607 65G0603102 32 1000PF +-10% 50V X7R 1 PCS C608 65G0603102 32 1000PF +-10% 50V X7R 1 PCS C609 65G0603102 32 1000PF +-10% 50V X7R 1 PCS C610 65G0603102 32 1000PF +-10% 50V X7R 1 PCS C201 65G0603104 32 CHIP 0.
Buffalo BU1715 C510 65G0603104 32 CHIP 0.1UF 50V X7R 1 PCS C601 65G0603104 32 CHIP 0.1UF 50V X7R 1 PCS C612 65G0603104 32 CHIP 0.1UF 50V X7R 1 PCS C613 65G0603104 32 CHIP 0.1UF 50V X7R 1 PCS C618 65G0603104 32 CHIP 0.1UF 50V X7R 1 PCS C619 65G0603104 32 CHIP 0.1UF 50V X7R 1 PCS C403 65G0603220 31 CER1 0603 NP0 50V 22P P 1 PCS C602 65G0603220 31 CER1 0603 NP0 50V 22P P 1 PCS C312 65G0603221 31 CER1 0603 NP0 50V 220P 1 PCS C605 65G0603224 17 CAP: CER 0.
Buffalo BU1715 D301 93G 6433P BAV99 1 PCS D302 93G 6433P BAV99 1 PCS D303 93G 6433P BAV99 1 PCS D324 93G 6433P BAV99 1 PCS D317 93G 39S 39 T MLL5234B 1 PCS D201 93G1004 3 SS14 1 PCS D202 93G1020 1 S GS1D 1 PCS 715L1423 1512 PCB 1 PCS AIK780KMN KEY BOARD 1 PCS CN103 33G3802 2H WAFER 2P RIGHT ANGLE 1 PCS CN104 33G3802 2H WAFER 2P RIGHT ANGLE 1 PCS CN101 33G801712A H PIN HEADER 2*6 R/A 1 PCS SW101 77L 600 1GHJ KEY SWITCH 1 PCS SW102 77L 600 1GHJ
Buffalo BU1715 C904 63G 107474 HS 0.47UF +-20% 275VAC 1 PCS C906 65G 2K152 5E6921 1500 PF 10% 2KV Y5P 1 PCS C913 65G306M4722B2 Y1 4700PF +-20% 250VAC 1 PCS C215 65L 3J2206ET 22PF 5% 3KV TDK 1 PCS C216 65L 3J2206ET 22PF 5% 3KV TDK 1 PCS C217 65L 3J2206ET 22PF 5% 3KV TDK 1 PCS C218 65L 3J2206ET 22PF 5% 3KV TDK 1 PCS C901 65L305M2222E3 2200PF+-20%400VAC BY TD 1 PCS C902 65L305M2222E3 2200PF+-20%400VAC BY TD 1 PCS C905 67G215S10115N PAG450VB100-M-L18*35.
Buffalo BU1715 Q201 57G 760 5A DTC 144WN3/S SOT-23 1 PCS Q203 57G 763 3B AM9435P.T1-PF SO-8 1 PCS Q204 57G 763 3B AM9435P.T1-PF SO-8 1 PCS R929 61L0603000 RST SM 0603 JUMP MAX 0R 1 PCS R931 61L0603102 RST SM 0603 RC0603 1K P 1 PCS R216 61L0603221 RST SM 0603 RC0603 220R 1 PCS R217 61L0603221 RST SM 0603 RC0603 220R 1 PCS R925 61L0603362 CHIP 3.6K OHM 1/10W 1 PCS R212 61L0603392 CHIP 3.9K OHM 1/10W 1 PCS R213 61L0603392 CHIP 3.
Buffalo BU1715 C203 65G0805105 27 CHIP 1UF Y5V 0805 1 PCS C209 65G0805105 27 CHIP 1UF Y5V 0805 1 PCS C210 65G0805105 27 CHIP 1UF Y5V 0805 1 PCS C211 65G0805105 27 CHIP 1UF Y5V 0805 1 PCS C212 65G0805105 27 CHIP 1UF Y5V 0805 1 PCS C219 65G0805105 27 CHIP 1UF Y5V 0805 1 PCS C220 65G0805105 27 CHIP 1UF Y5V 0805 1 PCS C224 65G0805105 27 CHIP 1UF Y5V 0805 1 PCS C225 65G0805105 27 CHIP 1UF Y5V 0805 1 PCS D203 93G 39S 3 T BZT52-C11 1 PCS D204 93G 39S 3 T BZT52-C1
Buffalo BU1715 R210 61G 60215352T 15KOHM 5% 1/6W 1 PCS R211 61G 60215352T 15KOHM 5% 1/6W 1 PCS R220 61G 60215352T 15KOHM 5% 1/6W 1 PCS R221 61G 60215352T 15KOHM 5% 1/6W 1 PCS R214 61G 60222252T 2.2K 5% 1/6W 1 PCS R215 61G 60222252T 2.
Buffalo BU1715 C208 65G 44233113T 330PJNPO 50V 1 PCS C398 65G 444471 5T 470P/50V DIP 1 PCS C399 65G 444471 5T 470P/50V DIP 1 PCS C908 65G 450104 7T 0.1UF +80-20% 50V Y5V 1 PCS C920 65L517K102 5T6213 1000PF 10% Y5P 500V 1 PCS C921 65L517K102 5T6213 1000PF 10% Y5P 500V 1 PCS C907 67G 2152207NT KY50VB22M-TP5 5*11 1 PCS C926 67G 2154713NT KY16VB470M-TP5 8*15 1 PCS C207 67G 2154797NT LOW ESR 4.
