KDL-48R485B - Sony TV Service Manual (repair manual). Page 9

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KDL-48R485B 5
SECTION 2 - TROUBLESHOOTING
TRIAGE CHART
Use this general Triage Chart to determine what may possibly be causing the error before going out to the customers location. 
User
Interface
NG
No Picture
(UI OK)
Audio
2X     3X    4X    5X     6X   
USB
Tuner
Tuner
Video
SCART
MAIN BOARD
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
▲
LIGHT SOURCE BOARD
OPEN CELL
AC ADAPTOR
SPEAKERS
LS HARNESS
SPEAKER HARNESS
Board
Reference
Symptoms - Shutdown. 
Power LED blinking 
red diagnostics sequences
MAIN HARNESS
FFC CABLE






























Component
HDMI
MHL
HP
Main
Speaker
Video
SCART
USB 
Component
HDMI

*NOTE: REFER TO LCD PANEL SERVICE MANUAL IN REFERENCE LIBRARY DATABASE 
FOR CORRECT REPLACEMENT PARTS BASED ON SERIAL NUMBER.
1.  Confirm the symptom from the customer.
    Red Dot: (Primary) Most likely defective part.  
2.  Select that symptom from the chart.
    Blue Triangle: (Secondary) Possible defective part.
3.  Bring the primary component listed for that symptom.
5.  Chart Color Code.
4.  Follow the associated flowcharts in the Training Manual to isolate the board.

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