LG 50PZ550-ZA / 50PZ550A-ZA / 50PZ550N-ZA (CHASSIS:PD11A) Service Manual ▷ View online
ⓒ LG Electronics. Inc.2010
A27
Check Local Key operation
General Function Problem
26
No.
Symptom
Detail
Page
Remark
18
Picture Problem
Defect type cause by PDP Module
A19
19
Connector Type on PDP Module
A20
20
RF Signal level Checking method
A21
21
Power Problem
Check voltage on Power board
A22
22
Power board Checking Method
A23
23
Check Power off History
A24
24
Sound Problem
Speaker cable checking method
A25
25
Check Remote control IR operation
A26
27
Check RF emitter operation
A28
PDP TV Repair Process Reference data Index
ⓒ LG Electronics. Inc.2010
You can see 20 types patterns by using TILT Key on SVC Remote controller (except Old model)
< CHECK Item >
< CHECK Item >
1. Dead pixel 2.Image sticking
3.Mal discharge
4.Module defect (V-Line/Bar, H-Line/Bar,,,)
5. In case of no picture, you can judge defect cause (Module or Main B/D)
- If patterns appear, defect cause is Main B/D
Tilt Key
Making
전자 - 6-2
Revision
PDP TV
Symptom
A. Picture Problem
Check Module pattern by Tilt key
Repair Process-Reference data
Item
A1
A1
2010. 11. 16
ⓒ LG Electronics. Inc.2010
Making
전자 - 6-2
Revision
PDP TV
Symptom
A. Picture Problem
Audio check method
A2
Jack for Speaker connection
1.Check Audio output by using oscilloscope
GND ↔ R- or R+ or L- or L+
Audio output waveform
2.Check whether speaker jack was inserted properly or not.
Repair Process-Reference data
A2
2010. 11. 16
ⓒ LG Electronics. Inc.2010
Making
전자 - 6-2
Revision
PDP TV
Input
Block
All Input Audio Problem
Make sure you can’t hear any audio
Check speaker for damage.
Replace the Speaker
Y
N
Check Connector
P301
Replace P301
Y
N
Check SCL,SDA
R359, R360
Replace R359, R360
N
Y
Check IC700 Status
PDN(#23) / Reset(#31) is High?
Check
Reset (R380) / PDN (R374)
:They must be High (3.3V)
:They must be High (3.3V)
Y
N
Check IC303 Power
17V(C340), 3.3V(R365,R374)
Check 17V (P600 #1,2),
3.3V (IC606 #2)
Y
N
Y
Check Mstar I2S Output
#27,28, 29, 30 on IC303
Replace MSTAR(IC400).
N
Replace AMP(IC303)
Y
Repair Process-Reference data
A2-1
2010. 11. 16
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