4 Troubleshooting
4-2
X201 oscillate properly?
4-2 No Video (PC Analog Signal)
1
Replace or check related circuit.
Check signal cable connection and
power.
Yes
No
Is there R, G, B input at
R127, R125 and R118?
Check input part.
Yes
No
Is there Hsync, Vsync waveform
at R115, R112?
Check input part.
No
Yes
Is there Hsync, Vsync waveform
at Pin 40, 41 of IC202?
Check IC202 and related circuit.
No
Yes
Dose proper DC 5V appear
at Pin 2 of IC602?
Check Panel Cable.
No
Yes
Does the output signal
appear at Pin 8~13,15,
16, 18~23, 25~30 of CN602?
Check IC202, IC602, CN4003 and
related circuit.
No
Yes
Replace LCD Panel.
(Perform Automatic Color Adjustment)
2
2
3
3
Summary of Contents for Lacie720
Page 8: ...1 Precautions 1 4 Memo ...
Page 16: ...Memo 2 Product Specifications 2 8 ...
Page 22: ...3 Alignments and Adjustments 3 6 Memo ...
Page 25: ...4 Troubleshooting 4 3 WAVEFORMS Figure 1 PC Analog signal Waveforms ...
Page 27: ...4 Troubleshooting 4 5 WAVEFORMS Figure 2 PC Digital Signal Waveforms ...
Page 28: ...4 Troubleshooting 4 6 4 4 Main Circuit and Each Part Number Figure 3 Main Circuit ...
Page 50: ...7 Block Diagrams 7 2 7 2 Power Board Figure 2 Power Board Block Diagram ...
Page 51: ...8 Wiring Diagram 8 1 8 Wiring Diagram ...
Page 52: ...8 Wiring Diagram 8 2 Memo ...
Page 54: ...9 Schematic Diagrams 9 2 This Document can not be used without Samsung s authorization ...
Page 55: ...9 Schematic Diagrams 9 3 This Document can not be used without Samsung s authorization ...
Page 56: ...9 Schematic Diagrams 9 4 This Document can not be used without Samsung s authorization ...
Page 57: ...9 Schematic Diagrams 9 5 This Document can not be used without Samsung s authorization ...
Page 58: ...Memo 9 Schematic Diagrams 9 6 ...
Page 64: ...10 Operating Instructions and Installation 10 6 Memo ...
Page 69: ...12 PCB Daigram 12 1 12 PCB Diagram 12 1 Main Board Part Description ...
Page 70: ...12 PCB Diagram 12 2 12 2 Main Board Part Number ...