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4. Troubleshooting
UC6800 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 CD9113, CD9213, CD9313, CD9413 which are criteria for judgement.
46" LED Driver output for judgement
Voltage at the CD9113
17~19V
19V~30V
38V~41V
Judgement
Bottom right panel driver of the
PD Board is out of order.
PD board is acting
normally.
Bottom Right LED Bar
is out of order.
Voltage at the CD9213
17~19V
19V~30V
38V~41V
Judgement
Top right panel driver of the PD Board
is out of order.
PD board is acting
normally.
Top Right LED Bar is
out of order.
Voltage at the CD9313
17~19V
19V~30V
38V~41V
Judgement
Top left panel driver of the PD Board is
out of order.
PD board is acting
normally.
Top left LED Bar is out
of order.
Voltage at the CD9413
17~19V
19V~30V
38V~41V
Judgement
Bottom left panel driver of the PD
Board is out of order.
PD board is acting
normally.
Bottom left LED Bar is
out of order.
55" LED Driver output criteria for judgement
Voltage at the CD9113
23~25V
27~36V
49~52V
Judgement
Bottom right panel driver of the
PD Board is out of order.
PD board is acting
normally.
Bottom Right LED Bar
is out of order.
Voltage at the CD9213
150~170V
224~284V
340~380V
Judgement
Top right panel driver of the PD Board
is out of order.
PD board is acting
normally.
Top Right LED Bar is
out of order.
Voltage at the CD9313
150~170V
224~284V
340~380V
Judgement
Top left panel driver of the PD Board is
out of order.
PD board is acting
normally.
Top left LED Bar is out
of order.
Voltage at the CD9413
150~170V
224~284V
340~380V
Judgement
Bottom left panel driver of the PD
Board is out of order.
PD board is acting
normally.
Bottom left LED Bar is
out of order.
Содержание UN46C6900VF
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Страница 65: ...4 25 4 Troubleshooting Location Main TOP R528 IC1101 CN1902 Location Main BOTTOM ...
Страница 66: ...4 26 4 Troubleshooting WAVEFORMS 5 Tuner CVBS Out Pattern Grey Bar ...
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Страница 72: ...4 32 4 Troubleshooting WAVEFORMS 0 Audio Input Sign Wave I2S Input Clk Data Audio Amp Out Sign Wave ...