LG 42PQ301R-ZB (CHASSIS:PP91B) Service Manual ▷ View online
Making
Revision
2009. 2 . 1
PDP TV
Symptom
A. Picture Problem
Connector Type on PDP Module
Repair Process-Reference data
A20
96 Out Put
COF Type
1. Check foreign & Connection status
2. Check bad soldering
2. Check bad soldering
on Chip resistance
▣ Defect symptom
192 Out Put
TCP Type
TCP (Tape Carrier Package) is film
for IC connect with Electrode pattern
(Direct Bonding) on X B/D
(Direct Bonding) on X B/D
FPC Type
Connector to connect between
Electrode PAD Of PANEL and
Y Drive B/D,Z-Sus B/D
Electrode PAD Of PANEL and
Y Drive B/D,Z-Sus B/D
A20
Making
Revision
2009. 2 . 1
PDP TV
Symptom
A. Picture Problem
RF Signal level Checking method
Repair Process-Reference data
◆ MENU
Æ SETUP Æ Diagnostics
1. Check whether Signal Strength, Signal Quality is over 50% or not.
2. If Signal Strength, Signal Quality is under 50%,install the Booster to increase signal level.
2. If Signal Strength, Signal Quality is under 50%,install the Booster to increase signal level.
A21
A21
Making
Revision
2009. 2 . 1
PDP TV
Symptom
Repair Process-Reference data
Check voltage on Power board
A22
B. Power Problem
Checking Order
Checking Order
Pin Map
Power B/D↔Main B/D
(P813) (P1100)
7
6
5
4
3
2
1
No.
Mechanical switch on
Low
(GND Value)
KEY-ON
High(3.3V~5V)
RL_ON
High(3.3V~5V)
AC DET
5V
STBY 5V
Check the other pin’s output
High(3.3V~5V)
Vs-ON
High(3.3V~5V)
M5V_ON
Remark
Spec
Checking
Point
A22
Making
Revision
2009. 2 . 1
PDP TV
Symptom
Repair Process-Reference data
Power board Checking Method
A23
B. Power Problem
① Check soldering status on each major component.
② Check there is problem on major component or not by eye.
(CONDENSER, FET, IC, Resistor)
③ Check FUSE.
④ Check 5V,Va,Vs voltage
※ PSU Maker: 1)LG IT 2)Sanken 3)Lite-On
※ If happen Power board Protection,
check whether there is Short or Open on Y-SUS, Z-SUS B/D or not.
▣ Checking Method
Va Voltage ADJ
- value
+ value
Adjust way
M5V
9
NC
3
VS
2
VS
1
Va
6
GND
5
GND
4
M5V
10
GND
8
Va
7
P811
Pin
Power B/D↔ Y-Sus B/D
◆ Check 5V,Va,Vs voltage
→ For Voltage specification,
refer to the PDP Module Label.
Fuse
Vs Voltage ADJ
◆ Adjust Va,Vs voltage.
Vs adjust
Va adjust
A23
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