Protection Mode 6X(55") & 7X Troubleshooting Flowchart - Sony KDL-55EX500 Troubleshooting Manual

Protection Mode 6X(55") & 7X 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
6X Blink Pattern
(No Backlight)
55" Models
Check HV at
D1-Brd Output
*Before Shutdown
Is
voltage
HV Before
Shutdown
?
Yes
Check Backlight-ON
signak at
CN201/pin 11
*Before Shutdown
Is
voltage
3V Before
Shutdown
?
Yes
CTV-65
NOTES:
Check 390V connection
CN6301 on (G5E-Brd) to
CN6601 (D1-Brd)
Is
Connection
Okay
?
No
No
Repair
Connection
No
Check for
Open or Short
Replace
A-Board
C3
Flowchart C 3 (AZ1K 55" & 60" Models)
Unit Shuts OFF
RED LED
Blinking
Yes Replace
D1-Board
Check Dimmer signal at
CN6201/pin 12
*Before Shutdown
Is
voltage
No
Check for
1V to 3V Before
Short
Shutdown
?
Replace
Yes
A-Board
Replace
G5E-Board
Triage & Troubleshooting Flowcharts
Protection Mode Troubleshooting
Temperature Threshold
Ambient 80°C
7X Blink Pattern
Temperature Error
unit Shut-Down
Yes
Immediately after
Power ON
Clear unit ventilation areas
and confirm adequate local
room temperature
Does unit still
shutdown (7X)?
Replace
A-Board
Does
?
No
No Issue
Resolved
Yes
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