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4. Troubleshooting
UC7000 PD BOARD DIAGNOSIS
General PD board Diagnosis
1.
Disconnect the wire between PD board and Main board.
Short Circuit 16pin and 18pin of CNM801
▶
If the BLU on , we can consider PD board is acting correctly.
LED Driver output diagnosis
2.
Measure voltage at C9117 or C9114 which are criteria for judgement
Measure voltage at C9217 or C9214 which are criteria for judgement
46" LED Driver output criteria for judgemen
Voltage at the C9114 or C9117
150~170V
179~256V
340~380V
Judgement
PD board is in out of order or bottom
LED bars of the panel are short circuit.
PD board is acting
normally.
Bottom LED bar wire is
down.
Voltage at the C9214 or C9217
150~170V
179~256V
340~380V
Judgement
PD board is in out of order or top LED
bars of the panel are short circuit.
PD board is acting
normally.
Top LED bar wire is
down.
55" LED Driver output criteria for judgement
Voltage at the C9114 or C9117
150~170V
224~284V
340~380V
Judgement
PD board is in out of order or bottom
LED bars of the panel are short circuit.
PD board is acting
normally.
Bottom LED bar wire is
down.
Voltage at the C9214 or C9217
150~170V
224~284V
340~380V
Judgement
PD board is in out of order or top LED
bars of the panel are short circuit.
PD board is acting
normally.
Top LED bar wire is
down.
Summary of Contents for UN46C7000WF
Page 68: ...4 3 4 Troubleshooting ...
Page 79: ...4 14 4 Troubleshooting Location Main TOP BOTTOM A B Detail A CN401 B IC6001 ...
Page 80: ...4 15 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Page 82: ...4 17 4 Troubleshooting Location Main TOP BOTTOM A C B Detail A IC501 B CN2101 C IC1001 ...
Page 85: ...4 20 4 Troubleshooting Location Main TOP BOTTOM A C B Detail A TU701 B CN2101 C IC1001 ...
Page 86: ...4 21 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 6 Eagle Out Clk H Sync ...
Page 88: ...4 23 4 Troubleshooting Location Main TOP BOTTOM A C B Detail A TU701 B CN2101 C IC1001 ...
Page 89: ...4 24 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Page 91: ...4 26 4 Troubleshooting Location Main TOP BOTTOM A C B Detail A CN408 R439 B CN2101 C IC1001 ...
Page 92: ...4 27 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar ...
Page 95: ...4 30 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar 9 Component Input Y Pb ...
Page 97: ...4 32 4 Troubleshooting Location Main TOP BOTTOM A B Detail A CN407 B CN302 CN2101 IC303 ...