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Samsung 330TFT, 530TFT, 530 TFT, 531 TFT, 531TFT, 331 TFT No Video, Does the sync pulses appear at

Models: 330TFT 531 TFT 331 TFT 530TFT 530 TFT 531TFT

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6 Troubleshooting

6-2 No Video

Power indicator is green

Does the clock pulse appear at output of FT110, FT111, FT112?

Yes

18 19

Does the sync pulses appear at

Pins 13 and 14 of IC110?

Yes

2 3 4 5

Do the sync pulses appear at Pins 22, 23, 25 and 26 of IC310?

Yes

Do the waveforms appear at

Pins 5 and 20 of CN301?

No		7	No
No	Does the H-sync pulse appear		No
	Does the H-sync pulse appear
	at Pin 94 of IC101?

Yes

Replace IC101.

No		20	1	No
No	Does the sync pulses appear at			No
	Does the sync pulses appear at

Pins 2 and 3 of IC110?

Yes

Replace IC110 or check its

related circuit.

No	10		11		12		13		14	No
No										No

Do the sync pulses appear at Pins

2, 3, 54, 55 and 56 of IC301?

Yes

Replace IC305 or check its

related circuit.

No	Replace IC310 and IC311 or
	check its related circuits.

8 9

Does the pulse appear at Pin 10

of IC105 or Pin 1 of IC104?

Yes

Replace IC106.

Replace IC105 (seperate sync)

or IC104 (SOG).

Check IC401 and IC101.

Replace IC301 or check its

related circuit.

Yes

Replace LCD Panel

6-2	SyncMaster 33TFT/53TFT

Page 22

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Samsung 330TFT, 530TFT, 530 TFT, 531 TFT, 531TFT, 331 TFT specifications No Video, Does the sync pulses appear at

Contents

SERVICE Manual SyncMaster 330TFT SyncMaster 530TFT SyncMaster 331TFTSyncMaster 531TFT CONTENTSPrinted in Korea Code No. BN68-60017A 1-1-4 Product Safety Notices 1 Precautions1-1 Safety Precautions 1-1-1 Warnings1-3 Electrostatically Sensitive Devices ESD Precautions 1-2 Servicing Precautions1-2-1 General Servicing Precautions 2 Reference Information 2-1 List of Abbreviations, Symbols and Acronyms2-1-1 Abbreviations 2-1-2 Acronyms 2-1-2 SymbolsProgrammable Read only Memory 3 Product Specifications 3-1 Specifications3-2 Pin Assignments Pin NoMode 3-3 Timing ChartTiming 60 x ModeTiming 640/67 HzLocation 4-1 Control and Connectors4 Operating Instructions MENUFigure 4-3. Front View and Control 4 Operating Instructions4-1-2 SyncMaster 330TFT/530TFT Figure 4-4. Rear View Table 4-2. Front Panel Controls4-2 Microprocessor Controls and Functions 4-2-1 OSD Window4-3-1 Audio Adjustments 4-4 Power Management System4-3 Audio Controls 5-1-2 Main Body Disassembly 5 Disassembly and Reassembly5-1 Disassembly 5-1-1 Removing the Stand5-1-3 Stand Disassembly 5 Disassembly and Reassembly 3. Remove the 10 screws from the stand assembly4. Remvoe the hinge, neck front, PCB, signal cable 5. Remove the screw and washer on the base of the stand5-2 Replacement Order of Lamp Assemblies 13.3” 5-3 Replacement Order of Lamp Assemblies 15” 5-4 Reassembly 5 Disassembly and Reassembly6 Troubleshooting 6-1 No Power6-2 No Video Does the sync pulses appear atWAVEFORMS 6-5 User Controls Don’t Work 6-3 No Video of Alternate Vertical Line6-4 No OSD WAVEFORMS6-6 No Sound SyncMaster 330TFT/530TFT Does the DC 5 V appear at Pin 5 of CN806, Pin 4 of IC803?6-8 Headphones Don’t Work SyncMaster 330TFT/530TFT 6-7 Microphones Don’t Work SyncMaster 330TFT/530TFTSpecification 9 Electrical Parts List9-1 Main PCB Parts Loc. NoLoc. No 9 Electrical Parts ListSpecification DescriptionSyncMaster 3*TFT/53*TFT 9 Electrical Parts ListSpecification Loc. NoLoc. No 9 Electrical Parts ListSpecification DescriptionCode No SpecificationLoc. No DescriptionDescription SpecificationLoc. No RemarksCode No SpecificationLoc. No DescriptionDescription SpecificationLoc. No RemarksSyncMaster 3*TFT/53*TFT 9 Electrical Parts ListSpecification Loc. NoLoc. No SpecificationR-CHIP R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK R-NETWORK RELAY-POWER SWITCH-SLIDE VR-ROTARY OSCILLATOR-CLOCK OSCILLATOR-CLOCK CRYSTAL-UNIT DIODE-ZENER DIODE-ZENER DIODE-ZENER DIODE-ZENER DIODE-ZENER DIODE-ZENER DescriptionLoc. No 9-2 Sub PCB PartsSpecification Code NoLoc. No 9 Electrical Parts ListSpecification DescriptionSyncMaster 3*TFT/53*TFT 9 Electrical Parts ListSpecification 9-13Loc. No OthersSpecification Code NoLCD PANEL 8 Block DiagramLVDS x AudioMemo 8 Block Diagrams10-2 Semiconductor Lead Identification TYPE NO TYPE NOREF. NO REF. NOLCD PANEL 11 Wiring DiagramAUDIO FUNC PCB SMPSPower Line 12 Schematic Diagrams12-1 DAC & IO Part Schematic Diagram Signal Line12-2 12 Schematic DiagramsSyncMaster 33*TFT/53*TFT Table 12-1. IC102Power Line 12-2 ZOOM & FRC Part Schematic DiagramSignal Line 12-4 12 Schematic DiagramsSyncMaster 33*TFT/53*TFT Table 12-6. IC3091024 x 768 / 85 Hz 12-3 Micom Part Schematic DiagramPower Line 1024 x 768 / 85 HzSyncMaster 33*TFT/53*TFT 12-4 Sub Part Schematic Diagram12 Schematic Diagrams 12-612 Schematic Diagrams Memo