Sony KD-55A8F - 3.3 No Sound Power Off Check

(Supplementary
information)
3.3 No Sound Power Off Check
Power Off Check
From 2.2
Confirm the speaker
harness
Cut or shorted
to the chassis ?
Replace Speaker
Harness
Yes
Power Off Check
From 3.0
Replace BM2A-PWB
No
Yes
No
Yes
No
Yes
(1) BM2A-PWB
Fuse
(F3200,F3201,F3202)
broken?
(2) BM2A-PWB
PVDD-GND(C3288)
short ?
(3) BM2A-PWB
LDO out(C3287)
short ?
Replace
Speaker
Measure the Speaker
impedance by multi-meter
Less than 3Ω ?
Yes
NO
NO
38
* In case of Actuator, replace Panel module.
SYSSET
2018/03/1622:32:44(GMT+09:00)