Sony KDL-50R550A / KDL-60R520A / KDL-60R550A / KDL-70R550A (serv.man2) Service Manual ▷ View online
37
3-5. TV COMMANDER BUTTONS MALFUNCTION
TROUBLE SHOOTING
1) TV button malfunction
KDL-50R550A, 60R520A/550A, 70R550A(PA)
Button malfunction
on the TV
Replace the harness
between Main board
and Key module
Key module issue
Harness issue
Change
Key module
Change
Main board
NG
NG
Symptom
improvement
Symptom
improvement
OK
OK
38
TROUBLE SHOOTING
2) IR remote commander malfunction
KDL-50R550A, 60R520A/550A, 70R550A(PA)
TV isn’t controlled
by remote commander
OK
NG
Green LED light
at power indicator
Change Main board to
IR board FFC
IR FFC
issue
NG
Green LED blinks at power indicator
when using commander
near sensor’s window
OK
NG
Change
Main board
NG
Change IR board
IR board issue
Change
Remote Control
battery
Symptom
improvement
Symptom
improvement
OK
OK
KDL-50R550A, 60R520A/550A, 70R550A(PA)
39
SEC 4. DIAGRAMS
4-1. BLOCK DIAGRAM
KDL-50R550A, 60R520A/550A, 70R550A(PA)
40
DIAGRAMS
4-2. CONNECTOR DIAGRAM
4-2-1. KDL-50R550A
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