Troubleshooting - Sony XR-55X90K Service Manual

TROUBLESHOOTING

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 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
LD-Board

V By One

FFC
T-con

LCD Panel ▲

Camera
(bundle or
accessory)
Panel
Power Power Panel (Communication)
Problem
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 FRCTC
6 7 8 DEMOD
DEMOD _ERR _I2C
_I2C
■
   
■


▲

■
Panel
(Backlight) TEMP 4KBE
No
Power
No White
Power LED Stationary
AUD 4KPQ TEMP EARC AMB
& does not colored
_ERR _ERR _ERR _ERR _ERR
respond to lines or
_I2C _I2C _I2C _I2C _I2C
remote
(Dead Set)
▲
 

 
Video
Remote Network Audio
- missing or distorted
No No No
NO No connect
video video video
RF Remote
One of of all
input Operation Wireless
dots Inputs Camera Inputs
Network
     
▲

 
 ■

■

Smart Bluetooth
Core (BT)
Cannot Bluetooth /
Smart Core
One Step
No no LED
to Remote
Audio (Set is still
(OSR) can't
alive)
connect
   



 
14
SYS SET