COLOR MONITOR SyncMaster 770TFT SERVICE Manual COLOR MONITOR CONTENTS 1. Precautions 2. Product Specifications 3. Disassembly & Reassembly 4. Alignments & Adjustments 5. Troubleshooting 6. Exploded View & Parts List 7. Electrical Parts List 8. Block Diagram AUTO EXIT MENU A B 9. Wiring Diagram 10.
Samsung Electronics Co., Ltd. September 1999 Printed in Korea Code No.
1 Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1 Safety Precautions 1-1-1 Warnings 1. For continued safety, do not attempt to modify the circuit board. 2. Disconnect the AC power and DC power jack before servicing. (READING SHOULD NOT BE ABOVE 0.5mA) 1-1-2 Servicing the LCD Monitor 1. When servicing the LCD Monitor, Disconnect the AC line cord from the AC outlet. 2.
1 Precautions 1-2 Servicing Precautions WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of this manual. Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions. 1-2-1 General Servicing Precautions 1. 2. 3.
2 Product Specifications 2-1 Specifications Item Description LCD Panel TFT-LCD panel, RGB vertical stripe, normally black transmissive, 17-Inch viewable, 0.264 (H) x 0.264 (V) mm pixel pitch Scanning Frequency Horizontal : 30 kHz to 81 kHz (Automatic) Vertical : 56 Hz to 85 Hz (~XGA), 76 Hz (SXGA) Display Colors 16,7 Million colors Maximum Resolution Horizontal : 1280 Pixels @ 81 kHz Vertical : 1024 Pixels @ 76 Hz Input Video Signal Analog, 0.
2 Product Specifications 2-2 Pin Assignments Sync Type Pin No.
2 Product Specifications 2-3 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for computer-generated video signals. Table 2-1. Timing Chart Mode IBM VGA2/ 70 Hz VESA VGA3/ 60 Hz 720 x 400 640 x 480 Timing 640/75 Hz 640/85 Hz 800/75 Hz 800/85 Hz 1024/60Hz 1024/75Hz 1024/85Hz 1280/76Hz 1280/75Hz 640 x 480 640 x 480 800 x 600 800 x 600 1024 x 768 1024 x 768 1024x768 1280x1024 1280x1024 fH (kHz) 31.469 31.469 37.500 43.269 46.
2 Product Specifications Memo 2-4 SyncMaster 770TFT
3 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the SyncMaster 770TFT TFT-LCD monitors. WARNING: This monitor contains electrostatically sensitive devices. Use caution when handling these components. 3-1 Disassembly Cautions:1. Disconnect the monitor from the power source before disassembly. 2. Follow these directions carefully; never use metal instruments to pry apart the cabinet. 3-1-1 Removing the Stand 1.
3 Disassembly and Reassembly Memo 3-2 SyncMaster 770TFT
4 Alignments and Adjustments This section of the service manual explains how to use the DDC JIG to adjust the black, red, green, and blue levels of the FPD when you replace the AD Board, and how to update the microprocessor when you change the Panel or Lamp(s). 4-1 Required Equipment The following equipment is necessary for adjusting the monitor: • Oscilloscope with probe tool • Computer with Windows 95 R , Windows 98 R , or Windows NT R . • DV17AS.
4 Alignments and Adjustments 4-2-1 Main Menu 4-2-2 Sub Menu 4-2-2 (a) Panel Information 4-2-1 (a) Service JIG : DV17 a 1 2 3 4 5 6 7 m l b c g n 8 10 9 11 12 13 d h e i f j 14 o 15 16 17 18 k Figure 4-3.
4 Alignments and Adjustments 4-2-3 Adjustment Procedures Use the following procedures whenever you replace the AD Board, Panel, or one or both of the Lamps. 4-2-3 (a) When Replacing the AD Board 1. Before replacing the AD Board, read all Panel information data by using the Read button on the DDC Control JIG. 2. Remove the old AD Board and replace it with a new board. 3. Perform the procedures described in section 4-2-3 (b). 4. Write the Panel information data to the new AD Board by using the Write button.
4 Alignments and Adjustments Memo 4-4 SyncMaster 770TFT
5 Troubleshooting Notes: 1. Before troubleshooting, setup the PC’s display as below. • Resolution: 1280 x 1024 • H-frequency: 64 kHz • V-frequency: 60 Hz 2. If no picture appears, make sure the power cord is correctly connected. 3. Check the following circuits. • No raster appears: Stand PCB, Main PCB • 14V develop but no screen: Main PCB • 14V does not develop: Main PCB 4. If you push and hold the EXIT button for more than 5 seconds, the monitor automatically turns back to the factory preset.
5 Troubleshooting 5-2 No Video Check signal cable and connection. Does the digital video signal appear at the Pin 34, 35, 39, 40, 42, 43, 45 and 46 of IC601? 15 16 17 18 Yes Is the output of Pin 1, 17 of IC501 High? Yes Check TFT-LCD panel and Inverter. No Check IC501 and related circuit.
5 Troubleshooting WAVEFORMS 1 CH1 RMS = 3.26V 5 CH1 RMS = 4.96V 2 CH1 RMS = 3.25V 6 3 CH1 RMS = 3.12V 7 4 CH1 RMS = 2.20V 8 CH1 RMS = 4.42V CH1 RMS = 3.20V CH1 RMS = 3.24V 10 15 16 CH1 RMS = 2.50V CH1 RMS = 960mV CH1 RMS = 3.08V CH1 RMS = 3.08V 17 18 CH1 RMS = 3.08V CH1 RMS = 3.
5 Troubleshooting 5-3 No OSD WAVEFORMS There is video but no OSD. 11 12 13 Does input signal appear at the Pins 2, 5 and 10 of IC404? 11 No Check IC405 and related circuit. CH1 RMS = 4.18V Yes 12 While pushing a front control button does any pulse appear at Pin 12 of IC404? No Check IC404 and related circuit. Yes CH1 RMS = 3.26V Replace IC404. 13 CH1 RMS = 3.
6 Exploded View and Parts List SyncMaster 770TFT 6-1
6 Exploded View & Parts List Memo 6-2 SyncMaster 770TFT
7 Electrical Parts List 7-1 Main PCB Parts Loc. No. C101 C102 C103 C104 C105 C106 C108 C109 C110 C111 C118 C119 C120 C121 C122 C123 C124 C125 C126 C127 C128 C129 C130 C131 C132 C133 C135 C136 C137 C150 C201 C202 C203 C204 C205 C207 C208 C209 C210 C211 C213 C214 C217 C218 C219 Code No.
7 Electrical Parts List Loc. No. C222 C223 C226 C230 C232 C233 C234 C235 C236 C238 C239 C240 C241 C242 C243 C244 C245 C246 C247 C248 C249 C301 C302 C303 C304 C305 C306 C307 C308 C309 C310 C311 C312 C313 C314 C315 C316 C317 C318 C319 C320 C321 C322 C323 C324 C325 C326 7-2 Code No.
7 Electrical Parts List Loc. No. C327 C328 C329 C330 C332 C333 C334 C335 C354 C355 C356 C357 C401 C402 C403 C404 C405 C406 C407 C408 C409 C410 C411 C412 C413 C414 C415 C416 C417 C418 C419 C420 C421 C422 C423 C424 C425 C426 C427 C428 C429 C430 C431 C432 C433 C434 C435 Code No.
7 Electrical Parts List Loc. No. C436 C437 C438 C439 C440 C441 C442 C443 C444 C445 C446 C448 C449 C450 C451 C452 C453 C454 C455 C456 C457 C458 C459 C460 C461 C501 C502 C503 C504 C506 C507 C508 C509 C510 C511 C512 C513 C514 C515 C516 C517 C601 C602 C603 C604 C605 C607 7-4 Code No.
7 Electrical Parts List Loc. No. C608 C609 C610 C611 C612 C613 C614 C615 C616 C617 C618 C619 C620 C621 C622 C623 C624 C625 C626 CA300 CA301 CA302 CA303 CA304 CA305 CA306 CA307 CA308 CA309 CA310 CA311 CA401 CA402 CA403 CA404 CA405 CA406 CA407 CA408 CA409 CA410 CA411 CA412 CN101 CN102 CN103 CN201 Code No.
7 Electrical Parts List Loc. No. CN202 CN601 CN602 D3 D101 D102 D103 D104 D201 D202 D203 D204 D205 D206 D207 D208 D209 D211 D212 D213 D214 D215 D216 D501 FT43 FT101 FT102 FT103 FT108 FT109 FT110 FT202 FT203 FT204 FT205 FT206 FT301 FT302 FT401 FT402 FT403 FT404 FT406 FT407 FT408 FT410 FT411 7-6 Code No.
7 Electrical Parts List Loc. No. FT501 FT502 FT503 FT601 FT602 FT603 FT604 FT605 FT606 FT607 FT608 IC13 IC101 IC102 IC201 IC204 IC205 IC206 IC207 IC208 IC209 IC300 IC401 IC402 IC403 IC404 IC405 IC406 IC501 IC502 IC503 IC504 IC601 L101 L102 L103 L104 L105 L106 L107 L108 L109 L110 L111 L112 L113 L114 Code No.
7 Electrical Parts List Loc. No. L115 L116 L117 L119 L120 L121 L122 L123 L124 L125 L126 L127 L129 L201 L202 L203 L204 L205 L206 L207 L401 L402 L601 L602 L603 Q101 Q102 Q103 Q105 Q501 Q502 Q503 R101 R102 R103 R104 R105 R106 R107 R108 R114 R201 R202 R203 R204 R205 R206 7-8 Code No.
7 Electrical Parts List Loc. No. R207 R208 R209 R211 R212 R214 R215 R216 R217 R218 R219 R224 R225 R227 R229 R230 R233 R234 R236 R237 R238 R240 R241 R242 R243 R248 R249 R250 R252 R254 R255 R256 R257 R258 R259 R260 R261 R262 R263 R267 R269 R301 R302 R303 R304 R305 R306 Code No.
7 Electrical Parts List Loc. No. R307 R310 R311 R312 R313 R316 R317 R343 R401 R402 R403 R404 R405 R406 R407 R408 R409 R410 R411 R412 R413 R414 R415 R416 R417 R418 R419 R420 R421 R422 R425 R426 R427 R501 R502 R503 R504 R505 R506 R507 R508 R509 R510 R511 R512 R513 R514 7-10 Code No.
7 Electrical Parts List Loc. No. R515 R516 R517 R518 R519 R520 R521 R522 R523 R524 R525 R526 R527 R528 R529 R530 R531 R532 R533 R534 R535 R536 R537 R538 R539 R540 R541 R542 R543 R544 R545 R546 R547 R548 R549 R550 R551 R552 R555 R556 R601 R602 R603 R604 R605 RA301 RA302 Code No.
7 Electrical Parts List Loc. No. RA303 RA304 RA305 RA306 RA307 RA308 RA309 RA310 RA311 RA312 RA401 RA402 RA403 RA404 RA405 RA406 RA407 RA408 RA409 RA410 RA411 RA412 RA413 RA414 RA415 RA416 RA417 RA418 U2 U6 U7 U8 X401 X501 7-12 Code No.
7 Electrical Parts List 7-2 Sub PCB Parts Loc. No. CN1 OP4 OP5 OP6 Q1 Q2 R1 R2 R3 R4 R5 R6 R7 R10 R11 R12 R13 R14 SW1 SW2 SW3 SW4 SW5 SW6 Code No.
7 Electrical Parts List Others Loc. No. LCD PROCESS-PBA UNIT S/CABLE P/CORD ADAPTER INVERTER 7-14 Code No. BN07-10001D BN94-00022B BN39-20001E BH39-10339Z BH39-10005A BH39-10007A BH39-10339E BH39-10006A BN44-00024A BN13-10001H Description LCD ASS’Y PCB CBF-SIGNAL CBF-POWER/CORD CBF-POWER/CORD CBF-POWER/CORD CBF-POWER/CORD CBF-POWER/CORD Specification LT17OX2-131, 404*322.
SyncMaster 770TFT DC 14V (Adapter) 13W3 D'SUB Video2 Video1 DC_DC H V Video Switch (IC201) R G B DC 3.3V DC 5V DC 12V MUX I2C I2C R/G/B Dot CLK Data Enable V_sync H_sync B_digital dVsync X-tal (24Mhz) Micro Control Unit I2C OSD (IC404) User Control H-Sync Sync Separator (U8) SOG OSD Control (IC406) (IC300) OSD Signal Engine B_digital G_digital Scaling G_digital Pre-AMP/PLL ADC/ R_digital SDRAM (IC401, IC402, IC403) (IC601) TMDS X-tal 14.
8 Block Diagrams Memo 8-2 SyncMaster 770TFT
GND IN14V CN101 IN14V 1 2 3 9 Wiring Diagram CN201 INVERTER CN1 GND BL_CNT GND BL_ON GND GND +5V GND GND 14V_BL 14V_BL 14V_BL 1 2 3 4 5 6 7 8 9 10 11 12 GND BL_CNT GND BL_ON GND GND +5V GND GND 10 14V_BL 11 14V_BL 12 14V_BL 1 2 3 4 5 6 7 8 9 RED GREEN BLUE GND GND GND GND GND NC SELF_TEST GND DDC_DATA H_SYNC V_SYNC DDC_CLK 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Signal Cable CN103 MAIN PCB RED & R_GND A1 GREEN&G_GND A2 BLUE & B_GND A3 DDC_CLK 1 CN202 DDC_CLK 2 NC 3 GND 4 5 H_SYNC 6 NC DDC_DATA 7
9 Wiring Diagram Memo 9-2 SyncMaster 770TFT
10 Schematic Diagrams 10-1 Signal Input Part Schematic Diagram 10-1 SyncMaster 770TFT
10 Schematic Diagrams 10-2 Scaler Chip Part Schematic Diagram 11 11 CH1 RMS = 4.18V 12 12 CH1 RMS = 3.26V 14 CH1 RMS = 4.
10 Schematic Diagrams 10-3 Power input Part Schematic Diagram 1 2 4 CH1 RMS = 3.26V 1 2 3 3 CH1 RMS = 3.25V 4 CH1 RMS = 3.12V CH1 RMS = 2.20V 15 16 CH1 RMS = 3.08V CH1 RMS = 3.08V 17 18 CH1 RMS = 3.08V CH1 RMS = 3.
10 Schematic Diagrams 10-4 Micom Part Schematic Diagram SyncMaster 770TFT 10-4
10 Schematic Diagrams 10-5 A/D Converter Part Schematic Diagram 7 CH1 RMS = 3.20V 9 CH1 RMS = 2.50V 8 CH1 RMS = 3.
