Protection Mode 2X, 3X, & 4X Troubleshooting Flowchart; Protection Mode 5X & 6X(60") Troubleshooting - Sony KDL-55EX500 Troubleshooting Manual

Protection Mode 2X, 3X, & 4X Troubleshooting Flowchart
1) All Red Blink patterns will occur on the Front Panel
Red "Standby" LED
2) All voltage are measured prior to unit shutdown
3) Confirm all connections between circuit boards
before replacing
AU12V LVP & SW12V OVP
(>) Greater Than
(~) Approximately (Does
not exceed)
CTV-65
NOTES:
Unit Shuts OFF
2X Blink Pattern
Check AU12V at
CN6201/pin 4
CN2 - 60"
*Before Shutdown
Replace
Is voltage
No
12V G5E-Board or
Present?
G8S-Board
Yes
Check SW12V at
CN6201/pin 9
CN2 - 60"
*Before Shutdown
Is
Replace
>12V
Voltage
G5E-Board or
~12V or >12V
G8S-Board
?
~12V
Replace
A-Board
Protection Mode Troubleshooting
C1
Flowchart C 1 (AZ1K 55" & 60" Models)
RED LED
Blinking
3X Blink Pattern
Audio
Check
Speakers &
Connections
Do
Speakers
Measure
8 ohms
?
Yes
Replace
A-Board
Triage & Troubleshooting Flowcharts
4X Blink Pattern
Balancer
Check LD
Volatge
CN6403/pin 7
Is voltage
0V or 12V
■
Present?
No Replace
Speaker(s)
Replace
G5E-Board or
G8S-Board
Is Problem
Solved?
Problem
Sloved
0V Replace
LCD Panel
12V
No Replace
A-Board
Yes
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