LG 50PW450 Service Manual - Page 31
B. Power Problem, Repair Process
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Repair Process PDP TV Symptom B. Power Problem No Power (Not turn on) Making Revision 2010. 11. 16 전자 - 6-2 6/10 Check Power LED . Stand-By: Red . Operating: Blue Power LED ON? N Y DC Power on by pressing Power Key On Remote control Check Power cord was inserted properly ☞A26 N Normal Check R/C IR Operation Y Close N Normal Y Repair/Replace IR B/D Y Normal ? ☞A22 N Check ST-BY 5V on Power Board Close Normal Y Voltage? N ☞A22 Check AC DET Signal on Power B/D Normal Signal? ☞A22 Y Check RL_ON Signal on Power B/D Normal Y Signal? N ☞A23 Check Power B/D Replace Power B/D N Check Main B/D Replace Main B/D ☞A22 Check the other pin's Output voltage on Power B/D Normal N Replace Power B/D Y Close 6 ⓒ LG Electronics. Inc.2010
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ⓒ
LG Electronics. Inc.2010
Making
전자
- 6-2
Revision
6/10
PDP TV
Symptom
B. Power Problem
No Power (Not turn on)
Repair Process
Y
N
Y
N
. Stand-By: Red
. Operating: Blue
6
Power LED
ON?
Check
R/C IR Operation
Normal
☞
A26
Check
Power LED
DC Power on
by pressing Power Key
On Remote control
Normal
Close
Y
N
Y
Repair/Replace
IR B/D
N
Check Power cord
was inserted properly
N
Normal
?
Close
Y
Check ST-BY 5V
on Power Board
Normal
Voltage?
☞
A22
N
Normal
Signal?
Y
Check Power B/D
Replace Power B/D
Check
AC DET Signal
on Power B/D
☞
A22
Check
RL_ON Signal
on Power B/D
N
Normal
Signal?
Y
Check Main B/D
Replace Main B/D
Check
the other pin’s
Output voltage
on Power B/D
Normal
Close
Y
N
Replace
Power B/D
☞
A22
☞
A22
☞
A23
2010. 11. 16