Sony XR-55A75L Service Manual page 16

TROUBLESHOOTING
Triage Chart: XR-*A80L / *A80CL / XR-*A75L
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 Color Code:
: Most likely defective part

: Secondary possible defective part

Symptoms - Shutdown. Power LED
blinking red diagnostics sequences
Reference
2 3 4 5
Main Board
■ ■


Power Board ■ ■
 
Receiver Board
Speaker

Wi-fi & BT
Module
V By One FFC

T-con ▲

OLED Panel ▲

Camera
(bundle or
accessory)
Panel
Problem
Power Power Panel (Communication)
Audio LD T-con
■
: Tertiary possible defective part
BLACK TEXT: Board that may correct the symptom
Symptoms - no shutdown
Error log record only
TU_
TU_ TCON_
6 7 8 DEMOD
DEMOD ERR
_I2C
■
  
■
▲

Panel
(Backlight) TEMP 4KBE
No
Power
No White
Power LED &
AUD_ 4KPQ TEMP_ EARC AMB_
FRCTC does not
ERR_I _ERR ERR_I2 _ERR ERR_I
_I2C respond to
2C _I2C C _I2C 2C
remote (Dead
Set)
▲



 
Video
Remote Network Audio
- missing or distorted
Stationary No No Cannot
No No
colored video NO RF video connect to
video of Remote
lines or One of input all Wireless
Camera Operation
dots Inputs Inputs Network
  
  
▲

 
 ■
 ■

Smart Bluetooth
Core (BT)
Bluetooth /
Smart Core
One Step
No no LED
Remote
Audio (Set is still
(OSR) can't
alive)
connect
  




 
16
SYS SET