Bang & Olufsen D6 Service Center Repair Manual page 8

1.6
Confirm PCB SC
Fault
TV channels – No picture or only snow
PDP stby. Light = green
PDP OSD OK
Possible causes
Defect PCB SC
Defect PCB D
Fault
TV channels – no picture or only snow
PDP stby. Light blinking
Possible causes
Adjustment of Vbk or Vad
PCB SC, C1 or C2
PCB D
PDP stby light blinking
Adjustment of Vsus, PCB D
PCB SC
PCB SS
Confirm PCB SC
Fault may be located
in either of the PCBs
Fault flow chart, English
Replace PCB SC
D6583 lit
Replace PCB D
PDP stby light blinking
3 times
2 times ------
3.3V failure
Confirm/adjust
PCB SC
Replace PCB D
D6583 lit
Vbk = 155 ± 5V
Fault solved? Replace PCB SC
SD, SU or SC
Replace PCB SC
Replace PCB SU
Replace PCB SD
1.6 1.6 Fault flow chart, English
No
Yes
PDP stby light blinking
4 times PDP stby light blinking
PDP stby light blinking
------- 5 times
7 times
5V failure
Confirm 5V on PCB D Confirm PCB SC
Replace PCB P
P25 pin 5
D6583 lit
Replace PCB P
------- Replace PCB SC
Replace PCB D
No 5V from PCB P
Blinking times Blink timing
3 sec
Once
2
No light
Light
3
4
5
7
9
PDP stby light blinking
9 times
-------
D6769 : 15V supply
D6765 : SS failure
Confirm PCB SS Confirm PCB SS Confirm +15V at
D6765 lit? D6769 lit? PCB SS P12 pin2
------- -------
-------
SOS signal
Lit? 15V supply OK 15V supply to PCB SS
Confirm/adjust
Replace PCB SS
PCB SC
Vbk = 155 ± 5V
Fault solved? Replace PCB SC
Contents & Check point
SCAN Driver 1
3.3V SOS
5V SOS
Power SOS
SCAN Driver 2
SUS Driver
Replace PCB P