Sony A1E Series Service Manual page 26

FLOW
2-3. LED BLINKING 4X (LED VOLTAGE ERROR/BCM ERROR)
*(Android N) LD_ERR / (Android M) BCM_ERR
4-time blinking
(LED Voltage)
Check Fuse'F3200'
Yes
On BKA board
Broken fuse?
NO
Symptom
Replace
improve
the V-By-One FFC
Between TCON
And DKA
NG
Symptom
improve
Replace
DKA Board
NG
High
Check "LD_ERR_DET" pin
At R5275 on DKA board
XBR-55/65A1E
Symptom
Replace
improve
F3200 or BKA board
BKA board
V-By-One FFC
is suspicious
DKA board
Symptom
improve
Replace
Panel
Panel
2-4. LED BLINKING 5X (PANEL ID READ ERROR/EEPROM ERROR)
5-times blinking
Check
"TCON_12_ON"
at R400
H
Replace the Harness
Between G* board
and DKA board
NG
Replace
the V-By-One FFC
Between TCON
And DKA board
NG
NG
Replace
G* board
Symptom
improvement
G* board
TROUBLE SHOOTING
L OK
Replace
DKA board
DKA board
Symptom
improve
Harness
Symptom
improve
V-By-One FFC
is suspicious
Replace
Panel (T-con)
Symptom
improvement
Panel (T-Con)
26