LG 50PJ350R Service Manual page 25

Repair Process
PDP TV
Symptom
Check
Power LED
Power LED
ON?
. Stand-By: Red
. Operating: White or Black
N
Check Power cord
was inserted properly
Normal
?
N
Check ST-BY 3.5V
on Power Board
Y
Normal
Voltage?
N
B. Power Problem
No Power (Not turn on)
DC Power on
Y
by pressing Power Key
On Remote control
Y
Close
Check
Normal
AC DET Signal
Signal?
on Power B/D
N
Check Power B/D
Replace Power B/D
N
Check
Normal
R/C IR Operation
Y
Close
Check
Y
Normal
RL_ON Signal
Signal?
on Power B/D
N
Check Main B/D
Replace Main B/D
6
Making
Revision
N
Repair/Replace
Normal
IR B/D
Y
Check
Y
the other pin's
Normal
Output voltage
on Power B/D
Y
Close
ⓒ LG Electronics. Inc.2009
N
Replace
Power B/D