Sony XR-55A95K Service Manual page 43

TROUBLESHOOTING
4.0 No Picture
No Picture
NG
Got Any Normal
Display?
Yes
Refer to other part:
Video, Tuner, HDMI
NG
Panel
(T-CON)
Check Smart Core Refer to the flow 1.0
NG
Behavior and check the power
(Blinking) supply problem
Yes
Yes
Refer to self diagnosis
Power supply problem
Part(flow 2.x)
NG
Replace
the Main board
Symptom
improvement
Main board NG
Replace
NG
the V by One FFC
Harness
(CN6800,CN6801)
Symptom
improvement
V by One FFC
Harness
Check around IC413 on BM5S22
Check FE_PANEL_PWR_ON
(CL445) BL_ON(CL446)
AC_DET_FE_OR_BE(CL447)
EVDD_DET(CL448)
are voltage >3V ?
& TCON_INT_ERR(CL449)
is voltage < 0.5V ?
Yes
Change
IC413
NG
Check
NG TCON_24_ON(CL451)
and
TCON_12_ON(CL452)
are voltage >3V ?
Yes
Panel
(T-CON)
43
SYS SET