Troubleshooting - Sony KD-55A8F Service Manual

Triage Chart
Before you make the service call...
1. Confirm the symptom from the customer.
2. Select that symptom from the chart.
3. Bring all the boards and cables listed for that symptom.
4. Follow the troubleshooting charts in the technical guides to isolate the board.
5. Chart Colour Code
RED DOT: Most likely defective part
BLUE TRIANGLE: Secondary possible defective part
BLACK TEXT: Board that may correct the symptom
Symptoms - Shutdown. Power LED
blinking red diagnostics sequences
Reference
2 3 4
B* Board
  
G* Board 

H* Board
Actuater

(Panel module)
Speaker

(Sub woofer)
Wifi & BT
Module
V By One FFC
Tcon

(Panel module)
OLED Panel

(Panel module)
Panel
Power Power Tcon (Communication)
Problem
Audio
Symptoms - no shutdown
Error log record only
AUD
TU_ TCO FRCT
_ER
5 6 7 8 DEM N_E C_I2
R_I2
OD RR C
C
     



 
 
Panel
Power TEMP 4KBE
SECTION 3

TROUBLESHOOTING

Video
No
Power - missing or distorted
No White Power
Stationary
LED & does not No video
4KPQ_ERR_
colored
reponse to One of
I2C lines or
remote (Dead Inputs
dots
Set)
  





Remote Network Audio
NO RF No video Wireless
No Remote No Audio
input all Inputs can't connect
   






Smart Core Bluetooth (BT)
Bluetooth / Voice
Smart Core no LED
Remote can't
(Set is still alive)
connect
  
 




14
SYS SET