Samsung SyncMaster 770TFT Service Manual Download Page 18 | Manualshive

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5 Troubleshooting

5-4

SyncMaster 770TFT

Replace IC404.

Yes

No

There is video but no OSD.

5-3 No OSD

While pushing a front control

button does any pulse appear

at Pin 12 of IC404?

WAVEFORMS

Does input signal appear

at the Pins 2, 5 and

10 of IC404?

Check IC405 and related circuit.

Check IC404 and related circuit.

Yes

No

11 12 13

11

CH1 RMS = 4.18V

13

CH1 RMS = 3.26V

12

CH1 RMS = 3.26V

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Summary of Contents for SyncMaster 770TFT

Page 1: ...IT A B MENU AUTO 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 9 Wiring Diagram 10 Schematic Diagrams www DataSheet4U com www DataSheet4U com www DataSheet4U com ...

Page 2: ...Samsung Electronics Co Ltd September 1999 Printed in Korea Code No BN68 00097A ...

Page 3: ...nit completely reassembled plug the AC line cord directly into a 120V AC outlet With the unit s AC switch first in the ON position and then OFF measure the current between a known earth ground metal water pipe conduit etc and all exposed metal parts including metal cabinets screwheads and control shafts The current measured should not exceed 0 5 milliamp Reverse the power plug prongs in the AC out...

Page 4: ...switch ON Connect an insulation resistance meter 500 V to the blades of the AC plug The insulation resistance between each blade of the AC plug and accessible conductive parts see above should be greater than 1 megohm 6 Always connect a test instrument s ground lead to the instrument chassis ground before connecting the positive lead always remove the instrument s ground lead last 6 Do not remove ...

Page 5: ...V Sync on Green 0 25 V Maximum Pixel Clock rate 135 MHz Active Display 338 3 mm Horizontal Vertical 270 3 mm AC power voltage Frequency AC 90 to 264 Volts 60 50 Hz 3 Hz Power Consumption 42 W max 40W normal Dimensions Unit W x D x H 17 32 x 7 16 x 18 19 Inches 440 x 182 x 462 mm Carton W x D x H 22 91 x 22 51 x 12 48 Inches 582 x 572 x 317 mm Weight Net Gross 8 4 kg 18 51 lbs 10 8 kg 23 80 lbs Env...

Page 6: ...ND G GND B No Connection Self Raster GND Bi Dr Data SDA H Sync V Sync DDC Clock SCL Red Green Blue GND DDC Return GND GND R GND G GND B No Connection Self Raster GND Bi Dr Data SDA H V Sync Not Used DDC Clock SCL Red Green H V Sync Blue GND DDC Return GND GND R GND G GND B No Connection Self Raster GND Bi Dr Data SDA Not Used Not Used DDC Clock SCL 13W3 A1 A2 A3 4 4 A1 GND A2 GND A3 GND 3 8 10 4 6...

Page 7: ...8 60 023 16 660 1 219 2 235 13 003 0 203 75 029 13 328 0 050 0 466 12 795 0 017 78 750 Positive Positive Separate 31 469 31 777 3 813 1 589 26 058 0 318 70 087 14 268 0 064 0 858 13 155 0 191 28 322 Negative Positive Separate fH kHz A µsec B µsec C µsec D µsec E µsec fV Hz O msec P msec Q msec R msec S msec Clock Freq MHz Polarity H Sync V Sync Remark IBM 640 75 Hz 640 x 480 640 85 Hz 640 x 480 80...

Page 8: ...2 Product Specifications 2 4 SyncMaster 770TFT Memo ...

Page 9: ...erter PCB and disconnect the 12P harness between CN1 connector on the inverter and CN103 connector on the Main PCB 8 Carefully lift the Main PCB Assembly and Inverter PCB and place them on a flat level surface that is protected from static electricity 9 Remove 4 screws on the PCB Bracket 10 Remove the Bracket Assembly from the Front Cover 11 Remove the 3 screws on the Function PCB from the Front C...

Page 10: ...3 Disassembly and Reassembly 3 2 SyncMaster 770TFT Memo ...

Page 11: ...r with Windows 95 Windows 98 or Windows NT DV17AS exe software DDC Control JIG 4 2 Using the DDC Control JIG After replacing the LCD Panel Lamp s and or AD Board use the DDC Control JIG to complete your service Attach the DDC Control JIG to the flat panel display FPD as shown in the diagrams below MONITOR INTERFACE BOARD VER 2 0 PC SIGNAL GENERATOR 3 WIRE CABLE SIGNAL CABLE 5V DC ADAPTOR PARALLEL ...

Page 12: ...Red max value Shows the red video signal max value Green max value Shows the green video signal max value Blue max value Shows the blue video signal max value Red min value Shows the red video signal min value Green min value Shows the green video signal min value Blue min value Shows the blue video signal min value Color Automatical screen contrast setting Auto Adjustment Red gain control Adjusts...

Page 13: ...lay 4 If you want to check each color value click the button from to and from to 4 2 3 c When Replacing the Panel 1 Select the Read Buffer button to gather the current information about this monitor 2 Increment the number by clicking on the button on the Panel row in the Change No column If they were not already 00 the numbers for the Upper and Lower Lamps will automatically change to 00 3 Check a...

Page 14: ...Memo 4 Alignments and Adjustments 4 4 SyncMaster 770TFT ...

Page 15: ...V 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 1 No Power Does proper DC 14 V appear at DC jack connected to CN101 Check Power Adaptor Yes No Does proper DC 5 V appear at Pin 4 of IC101 Check IC101 and related circuit Check Q103 Q105 and Q106 Yes No Does prope...

Page 16: ...nd related circuit No Check IC 300 and related circuit No Does the input signal appear at the Pins 40 41 of IC 300 PLL H V MX PDEN Yes During power on off does the input signal appear at the Pin 29 30 of IC300 AD SDA AD SCL Do the clok and sync signal appear at Pin 115 117 of IC 300 DCLKAB MX_HSYNC and does the digital video signal appear at thr output port PDA PDB Yes During power on off dose the...

Page 17: ...3 WAVEFORMS 2 CH1 RMS 3 25V 3 CH1 RMS 3 12V 4 CH1 RMS 2 20V 5 CH1 RMS 4 96V 6 CH1 RMS 4 42V 17 CH1 RMS 3 08V 18 CH1 RMS 3 08V 9 CH1 RMS 2 50V 10 CH1 RMS 960mV 15 CH1 RMS 3 08V 16 CH1 RMS 3 08V 8 CH1 RMS 3 24V 1 CH1 RMS 3 26V 7 CH1 RMS 3 20V ...

Page 18: ... 5 3 No OSD While pushing a front control button does any pulse appear at Pin 12 of IC404 WAVEFORMS Does input signal appear at the Pins 2 5 and 10 of IC404 Check IC405 and related circuit Check IC404 and related circuit Yes No 11 12 13 11 CH1 RMS 4 18V 13 CH1 RMS 3 26V 12 CH1 RMS 3 26V ...

Page 19: ...SyncMaster 770TFT 6 1 6 Exploded View and Parts List ...

Page 20: ...6 Exploded View Parts List 6 2 SyncMaster 770TFT Memo ...

Page 21: ...8 1 6m C130 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C131 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C132 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C133 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C135 2402 001044 C AL SMD 100uF 20 25V TP 8 3x8 3x6 3 C136 2203 000257 C CERAMIC CHIP 10nF 10 50V X7R TP 1608 C137 2203 005005 C CERAMIC CHIP 100...

Page 22: ... 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C304 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C305 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C306 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C307 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C308 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C309 2203 005005 C CERAMIC CHIP 100nF...

Page 23: ... TP 1608 1 6m C412 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C413 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C414 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C415 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C416 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C417 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C418 2203 0050...

Page 24: ... CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C460 2203 005005 C CERAMIC CHIP 100nF 15 16V W5R TP 1608 1 6m C461 2203 000292 C CERAMIC CHIP 10pF 5 50V NPO TP 1608 C501 2203 000257 C CERAMIC CHIP 10nF 10 50V X7R TP 1608 C502 2203 000257 C CERAMIC CHIP 10nF 10 50V X7R TP 1608 C503 2402 000176 C AL SMD 10uF 20 16V GP TP 4 3x4 3x5 4 C504 2402 000176 C AL SMD 10uF 20 16V GP TP 4 3x4 3x5 4 C506 2203 00062...

Page 25: ...1 6m CA300 2503 001018 C NETWORK 15PFX4 10 50V CA301 2503 001018 C NETWORK 15PFX4 10 50V CA302 2503 001018 C NETWORK 15PFX4 10 50V CA303 2503 001018 C NETWORK 15PFX4 10 50V CA304 2503 001018 C NETWORK 15PFX4 10 50V CA305 2503 001018 C NETWORK 15PFX4 10 50V CA306 2503 001018 C NETWORK 15PFX4 10 50V CA307 2503 001018 C NETWORK 15PFX4 10 50V CA308 2503 001018 C NETWORK 15PFX4 10 50V CA309 2503 001018...

Page 26: ...D216 0401 001056 DIODE SWITCHING MMBD4148SE 75V 600mA SOT 23 TP D501 0403 000579 DIODE ZENER BZX84C5V1 5 1V 5 200mW SOT 23 FT43 2901 001114 FILTER EMI SMD 25VDC 2 0ADC 100nF 3 2x1 6x1 FT101 3301 001145 CORE FERRITE BEAD AB 4 5x1 6x1 6mm FT102 3301 001145 CORE FERRITE BEAD AB 4 5x1 6x1 6mm FT103 3301 001145 CORE FERRITE BEAD AB 4 5x1 6x1 6mm FT108 3301 001145 CORE FERRITE BEAD AB 4 5x1 6x1 6mm FT10...

Page 27: ... QFP 128P 1 2LSB IC401 1105 001165 IC DRAM 416S1020B 2x512Kx16BIT SOP 50P IC402 1105 001165 IC DRAM 416S1020B 2x512Kx16BIT SOP 50P IC403 1105 001165 IC DRAM 416S1020B 2x512Kx16BIT SOP 50P IC404 BN09 00001A IC OSD PROCESSOR MTV 121P 131 16P IC405 0801 002237 IC CMOS LOGIC 74HC04 INVERTER GATE SOP 5P 49 IC406 1003 001243 IC LCD CONTROLLER MX88L282FC QFP 256P 1102MIL DU IC501 0903 001063 IC MICROCONT...

Page 28: ...x1 25x0 85mm L602 2703 001334 INDUCTOR SMD 1 5uH 10 2x1 25x0 85mm L603 2703 001778 INDUCTOR SMD 3 3UH 20 3 2X2 5X2 2MM Q101 0505 001170 FET SILICON SI9933ADY T1 P 20V 3 4A 0 075 Q102 0501 002080 TR SMALL SIGNAL 2SC2412K NPN 200mW SOT 23 TP 1 Q103 0501 002080 TR SMALL SIGNAL 2SC2412K NPN 200mW SOT 23 TP 1 Q105 0501 002080 TR SMALL SIGNAL 2SC2412K NPN 200mW SOT 23 TP 1 Q501 0501 002080 TR SMALL SIGN...

Page 29: ... CHIP 0ohm 5 1 16W DA TP 1608 R242 2007 000118 R CHIP 390ohm 5 1 16W DA TP 1608 R243 2007 000070 R CHIP 0ohm 5 1 16W DA TP 1608 R248 2007 000070 R CHIP 0ohm 5 1 16W DA TP 1608 R249 2007 000118 R CHIP 390ohm 5 1 16W DA TP 1608 R250 2007 000070 R CHIP 0ohm 5 1 16W DA TP 1608 R252 2007 000070 R CHIP 0ohm 5 1 16W DA TP 1608 R254 2007 000070 R CHIP 0ohm 5 1 16W DA TP 1608 R255 2007 000074 R CHIP 100ohm...

Page 30: ... CHIP 100ohm 5 1 16W DA TP 1608 R416 2007 000074 R CHIP 100ohm 5 1 16W DA TP 1608 R417 2007 000074 R CHIP 100ohm 5 1 16W DA TP 1608 R418 2007 000074 R CHIP 100ohm 5 1 16W DA TP 1608 R419 2007 000071 R CHIP 22ohm 5 1 16W DA TP 1608 R420 2007 000120 R CHIP 680ohm 5 1 16W DA TP 1608 R421 2007 000109 R CHIP 1Mohm 5 1 16W DA TP 1608 R422 2007 000074 R CHIP 100ohm 5 1 16W DA TP 1608 R425 2007 000070 R C...

Page 31: ... 100ohm 5 1 16W DA TP 1608 R538 2007 000074 R CHIP 100ohm 5 1 16W DA TP 1608 R539 2007 000074 R CHIP 100ohm 5 1 16W DA TP 1608 R540 2007 000092 R CHIP 15Kohm 5 1 16W DA TP 1608 R541 2007 000092 R CHIP 15Kohm 5 1 16W DA TP 1608 R542 2007 000074 R CHIP 100ohm 5 1 16W DA TP 1608 R543 2007 000074 R CHIP 100ohm 5 1 16W DA TP 1608 R544 2007 000074 R CHIP 100ohm 5 1 16W DA TP 1608 R545 2007 000074 R CHIP...

Page 32: ...2 R NETWORK 22ohm 5 1 16W L CHIP 8P ST RA408 2011 000002 R NETWORK 22ohm 5 1 16W L CHIP 8P ST RA409 2011 000002 R NETWORK 22ohm 5 1 16W L CHIP 8P ST RA410 2011 000002 R NETWORK 22ohm 5 1 16W L CHIP 8P ST RA411 2011 000002 R NETWORK 22ohm 5 1 16W L CHIP 8P ST RA412 2011 000002 R NETWORK 22ohm 5 1 16W L CHIP 8P ST RA413 2011 000002 R NETWORK 22ohm 5 1 16W L CHIP 8P ST RA414 2011 000002 R NETWORK 22o...

Page 33: ...0844 R CHIP 3Kohm 5 1 10W DA TP 2012 R7 2007 000844 R CHIP 3Kohm 5 1 10W DA TP 2012 R10 2007 000355 R CHIP 12Kohm 5 1 10W DA TP 2012 R11 2007 000300 R CHIP 10Kohm 5 1 10W DA TP 2012 R12 2007 000355 R CHIP 12Kohm 5 1 10W DA TP 2012 R13 2007 000300 R CHIP 10Kohm 5 1 10W DA TP 2012 R14 2007 000290 R CHIP 100ohm 5 1 10W DA TP 2012 SW1 3404 000243 SWITCH TACT 15V 20mA 160gf 50gf 6x3 4mm S SW2 3404 0002...

Page 34: ... CORD BH39 10339Z CBF POWER CORD DET RVV3 250V 10A BLK 18 CHINA BH39 10005A CBF POWER CORD CAP 1200MM 250V 10A BLK 18 UK THAILAND BH39 10007A CBF POWER CORD WALL 1830MM 250V 6A IVY SEG SESA SEF BH39 10339E CBF POWER CORD DET SVT 125V 7A 10A IVY SEA SESA BH39 10006A CBF POWER CORD WALL 1830MM 250V 10A IVY SEAU ADAPTER BN44 00024A INVERTER BN13 10001H Loc No Code No Description Specification Remarks...

Page 35: ... U8 OSD Control OSD Signal R G B DC_DC DC 12V dVsync H Sync SOG V H DC 5V R_digital G_digital B_digital R_digital G_digital B_digital H_sync V_sync Data Enable Dot CLK TMDS signal R G B TFT LCD Panel I C 2 MUX DCLK dHsync DC 14V Adapter SDRAM IC401 IC402 IC403 DC 3 3V I C 2 I C 2 User Control X tal 24Mhz X tal 14 3 Mhz Micro Control Unit TMDS IC601 ...

Page 36: ...8 Block Diagrams 8 2 SyncMaster 770TFT Memo ...

Page 37: ...CN202 1 2 3 4 5 6 7 8 9 10 DDC_CLK NC DDC_CLK GND H_SYNC NC NC SELF_TEST A1 A2 A3 DDC_DATA V_SYNC 1 2 3 4 5 6 KEY1 LED_G KEY2 LED_R GND KEY 5V 6 KEY 5V 7 8 9 5V GND 13W3_LED CN102 CN1 1 2 3 IN14V GND IN14V CN101 INVERTER MAIN PCB FUNC PCB Signal Cable 13W3 CABLE 10 D_SUB_LED 1 2 3 4 5 6 KEY1 LED_G KEY2 LED_R GND KEY 5V 6 KEY 5V 7 8 9 5V GND 13W3_LED 10 D_SUB_LED RED R_GND GREEN G_GND BLUE B_GND 5 ...

Page 38: ...9 Wiring Diagram 9 2 SyncMaster 770TFT Memo ...

Page 39: ...10 1 SyncMaster 770TFT 10 Schematic Diagrams 10 1 Signal Input Part Schematic Diagram ...

Page 40: ...10 Schematic Diagrams SyncMaster 770TFT 10 2 10 2 Scaler Chip Part Schematic Diagram 12 11 14 11 CH1 RMS 4 18V 12 CH1 RMS 3 26V 14 CH1 RMS 4 7V ...

Page 41: ...rams 10 3 SyncMaster 770TFT 4 1 2 3 15 16 17 18 10 3 Power input Part Schematic Diagram 2 CH1 RMS 3 25V 15 CH1 RMS 3 08V 16 CH1 RMS 3 08V 17 CH1 RMS 3 08V 18 CH1 RMS 3 08V 1 CH1 RMS 3 26V 4 CH1 RMS 2 20V 3 CH1 RMS 3 12V ...

Page 42: ...10 Schematic Diagrams SyncMaster 770TFT 10 4 10 4 Micom Part Schematic Diagram ...

Page 43: ...10 Schematic Diagrams 10 5 SyncMaster 770TFT 7 8 9 10 10 5 A D Converter Part Schematic Diagram 8 CH1 RMS 3 24V 7 CH1 RMS 3 20V 10 CH1 RMS 960mV 9 CH1 RMS 2 50V ...

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