Read Sony KDL-39R475A / KDL-42R474A / KDL-42R475A / KDL-46R475A Service Manual online
KDL-39R475A/42R474A/42R475A/46R475A 9
SECTION 2 - TROUBLESHOOTING
NO POWER FLOWCHART
No Power
Is standby LED
blinking?
No
Yes
No
See Standby
LED Blinking
flowchart
Yes
Does red standby
LED on front panel
light steady?
Press power
button while
monitoring pin 4 of
CN9301 on Power
Supply Board.
High (3.3V)
on pin 4?
Yes
No
Main Board
High (3.3V)
on pin 1?
Yes
No
Unplug TV from
AC power. Wait at
least 20 seconds
and re-apply AC
power.
39”?
Press power
button while
monitoring pin 4 of
CN9101 on Power
Supply Board.
High (3.3V) on
pin 4?
High (3.3V) on
pin 1?
Yes
No
Power Supply
Board
Power Supply
Board
Yes
Power Supply
Board
Power Supply
Board
Main Board
Power Supply
Board
No
Yes
No
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