Sony KD-43X8301C Service Manual page 97

2) Power Off Checking*2
Power Off Check*2
Segment "XS"?
No
(4) 12.5V check
12.5V is supplied to
B-PWB for a moment
before LED 3x brinking ?
No
Replace B-K Harness
OK ?
No
Replace G-PWB
OK ?
No
Return to
LED 3x blinking
KD-43/49X8301C (FW-43/49X8370C), 8305C, 8307C, 8308C, 8309C
Yes
Yes
Yes
Yes
Finish
(5) 12.5V check
Yes
12.5V is supplied to
K-PWB for a moment
before LED 3x brinking ?
No
Replace G-K Harness
Yes
OK ?
No
Replace G-PWB Yes
OK ?
No
Return to
LED 3x blinking
(4) 12.5V check BMFL / BMFW
Measure voltage between PVDD and GND at
capacitor C7706 or C7707.(See 3.3)
Voltage rise more than 0V for a moment at
power on
→ Yes
(5) 12.5V check KS-PWB (XS)
Measure voltage between PVDD and GND at
capacitor C7722, C7762, C7782 or C7834. (See
3.3)
Voltage rise more than 0V for a moment at
power on
→ Yes
Finish
TROUBLE SHOOTING
97