Samsung UN46C6900VF - Page 73

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4. Troubleshooting
UC6800 PD BOARD DIAGNOSIS
General PD board Diagnosis1.
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 diagnosis2.
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.