LG 50PS2000-ZB (CHASSIS:PD92A) Service Manual ▷ View online
Making
Revision
2009. 2 . 1
9/9
PDP TV
Symptom
D. General Function Problem
Remote control & Local switch checking
Repair Process
9
1. Remote controller (R/C) operating error
Y
N
Move
Power problem
Section
2. Local (Mechanical) switch operating error
Check R/C itself
Operation
Normal
operating?
Normal
operating?
Y
Close
Replace R/C
If R/C operate,
Explain the customer
cause is interference
from light in room.
Check R/C Operating
When turn off light
in room
Check & Replace
Battery of R/C
Check & Repair
Cable connection
Connector solder
Connector solder
Normal
operating?
Check B+ 5V
On Main B/D
Normal
Voltage?
Close
N
N
Check 5v on Power B/D
Replace Power B/D or
Replace Main B/D
(Power B/D don’t have problem)
Check IR
Output signal
Normal
Signal?
N
Y
Repair/Replace
IR B/D
N
Replace
Main B/D
Y
Y
N
Check R/C
Operation
Normal
operating?
Y
Check & Repair
Cable connection
Connector solder
Connector solder
Normal
operating?
Close
N
Check & Replace
Assembly status
(Key PCB + tool )
Check Key
Output signal
Y
Normal
operating?
Close
N
Normal
Signal?
Repair/Replace
Local switch B/D
N
Replace
Main B/D
Y
PDP TV Repair Process Index
- Trouble shooting by input block (Component level check)
13
USB Problem
USB Problem
13
14
All Input
No OSD
14
9
Digital TV / HDMI
9
10
Analog TV
10
11
Component / AV / RGB
11
12
Optical Audio
12
Video Probelm
Power Problem
8
All Input
Audio Problem
8
No.
Symptom (L)
Input Block
Page
Remark
1 Power-up
Boot
fail
1
2
Digital TV
2
3
Analog TV
3
4
Component
4
5
RGB(D-SUB)
5
6
AV(Scart / CVBS/ S-Video)
6
7
HDMI
7
Check P1100 All
Voltage Level (17V, 5V)
Check Power connector
OK ?
Replace Power board
Y
N
Y
Check L1103
Voltage Level 5V
Replace L1103
Y
N
Check IC1105 (pin2)
Voltage Level 3.3V
Replace IC1105
N
Check IC109 (pin29) Output
Voltage Level (3.3V)
Replace IC109
N
Y
Making
Revision
2009. 2 . 1
1/14
PDP TV
Symptom
Power-Up Boot Fail
Making
Revision
2009. 2 . 1
2/14
PDP TV
Input
Block
Digital TV Video Problem
Check RF Cable
Check TP Clock, Data, Sync
Maybe Tuner has problems
: Replace Tuner
Y
N
Check 5V voltage
on IC500, IC501(Chip Tuner)
Replace IC500 or IC501
Y
N
Y
Replace Mstar(IC100) has
problems
N
Y
Check color
Bad Tuner. Replace Tuner.
None
Green
Check Demodulator Input Clock
X501 (31.875MHz)
Replace it X501
N
Y
Check PDP Module
Control board
Refer to Module CAS
Control board
Refer to Module CAS
Check P400 or P403
#17(CKM) , #18(CKP) ,
#32(CKP) , #33(CKM)
#17(CKM) , #18(CKP) ,
#32(CKP) , #33(CKM)
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