Bang & Olufsen BeoPlay V1-40 MKII Service Manual page 22

3.6 Fault flow chart
From page
3.5 or 3.7
Confirm voltage
between PCB49, P3
Replace PCB49,
pin 1 and pin 2 and
Backlight Driver
between pin 5 and
pin 6 is approx. =
50V?
Check V-by-One
cables W30 Replace cable or
re-establish
between PCB01
and T-CON connections
OK?
Confirm signal on
Replace PCB01,
L4800 pin 2 *
Video Engine
OK?
* Measurment point
P121
L4800 L4801 L4802
L4800
L4800, pin 2
Measuring on L4800, pin 2 with signal from a source
0.2 V / div
Check PCB04, P18
pin 9, 11 P12V_
TCON = 12V
OK?
Replace LCD
L4803 L4804 L4805
D4827
L4830
L4
5 ms / div
Check PCB04, P18
pin 13
TCON_ON = 3.2V
OK?
Replace PCB04,
Power Supply Unit
Measuring on L4800, pin 2 without signal but with Menu
0.2 V / div
Yes
Replace PCB01,
Video Engine
Measurement plugs,
pins and test points;
see page 3.17
5 ms / div
No
Hint: