LG 60PS4000-ZA (CHASSIS:PD92A) Service Manual ▷ View online
Making
Revision
2009. 2 . 1
8/9
PDP TV
Symptom
C. Sound Problem
No sound/ Sound distortion
Repair Process
8
1.No sound(
If HDMI Input only have no sound, upload EDID data)
Y
Normal
Sound?
N
Check
“Speaker ON/Off” setting
in OSD Menu
Close
Y
Normal
Sound?
N
Close
Check Speaker
jack connection
& Speaker Cable open
Y
Normal
voltage?
N
Check 17V
(Audio IC B+)
on Power B/D
Check Power B/D
Replace Power B/D
Check Audio IC Short
Replace Main B/D
SVC
Bulletin?
Apply
SVC Bulletin
(S/W Upgrade etc)
N
Normal
Sound?
N
Y
Close
Y
2.Sound distortion & sound drop
Check Input signal
→Cable connection
→Cable open
→Cable open
- RF & external
(HDMI,SCART,,,)
Normal
Sound?
Y
Close
Check
AVL off/on
Clear voiceⅡ off/on
Y
Normal
Sound?
N
Close
N
Problem in all input
Problem in only DTV(Case 1)
Problem in external input(Case 2)
(SCART,HDMI,,,)
Check whether Problem happen
in same output of other equipments or not.
(By connecting same output cable of other equipment)
→ DVD Player ,Set-Top-Box, different maker TV etc
Y
Normal
Sound?
N
Check Audio IC
Replace Main B/D
Explain customer that
Cause is RF Signal’s problem (Case 1)
Cause is Equipment’s problem (case 2)
SVC
Bulletin?
Apply
SVC Bulletin
(S/W Upgrade etc)
Normal
Sound?
Y
Close
Y
N
N
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
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