DOWNLOAD LG 42PQ301R-ZB (CHASSIS:PP91B) Service Manual ↓ Size: 11.25 MB | Pages: 70 in PDF or view online for FREE

Model
42PQ301R-ZB (CHASSIS:PP91B)
Pages
70
Size
11.25 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / Plasma
File
42pq301r-zb-chassis-pp91b.pdf
Date
PREV: LG 42PQ300R-ZA (CHASSIS:PP91B) Service Manual

LG 42PQ301R-ZB (CHASSIS:PP91B) Service Manual ▷ View online

Making 
Revision 
2009. 2 . 1
PDP TV
Symptom
Repair Process-Reference data
Check Power off History
A24
B. Power Problem
▣ Check Power off History by using SVC Remocon
Press “In-start” →Press” 0000” → Select “Power Off History” → Pop up Module Rom ver.
Appear Power off history 5ea.
(1 is the latest history)
LAST HISTORY 1~5
In case that there is no signal for 15minutes
NO SIGNAL OFF
After turn on by OnTimer, There is no operation for 2hours
2HOUR OFF
Mechanical power switch off
KEY OFF
Power off by Remote control
RCU OFF
A24
Speaker
Jack for Speaker connection
1.Check whether speaker jack was inserted properly on Mian B/D side & speaker side or not.
2. Check whether speaker cable have problem (disconnection wire) or not.
A25
Making 
Revision 
2009. 2 . 1
PDP TV
Symptom
Repair Process-Reference data
Speaker cable checking method
C. Sound Problem
A25
Making 
Revision 
2009. 2 . 1
PDP TV
Symptom
D. General function defect
Repair Process-Reference data
1.Check connector was inserted properly 
on Main board  and IR board. 
2. Check +5V 
ST 
Voltage at Pin10
3. Check whether appear voltage on multi meter
when operate remote control.
※ Test Condition for case 3
→ Check Point: Pin 1( IR)
→ TV: power on status
→ Multi meter: Select DC 10V
▣ Checking method
Check Remote control IR operation
IR Board for XXPQ60xx 
SCL-Sub/AMP
GND
KEY-ON
KEY2
KEY1
GND
SDA-Sub/AMP
GND
+5V ST
(+5V-Multi)
( +3.3V-CI )
LED-Red
LED-Green
GND
IR
IR Board for XXPQ20/30xx 
IR Board
A26
A26
Making 
Revision 
2009. 2 . 1
PDP TV
Symptom
Repair Process-Reference data
1.Check connector was inserted properly 
on Main board  and local switch board. 
2. Check Key-on signal is low(GND Value, Mechanical switch on)
[ If mechanical switch off status, Key-on is high(5v) ]
3. Check whether appear voltage on multi meter
when operate Local switch.
※ Test Condition for case 3
→ Check Point: Pin 2,3( Key1,Key2)
→ TV: power on status
→ Multi meter: Select DC 10V
4. Check  bad solder & assembly status on Tactical power switch
▣ Checking method
Check Local switch operating
SCL-Sub/AMP
GND
KEY-ON
KEY2
KEY1
GND
SDA-Sub/AMP
GND
+5V ST
(+5V-Multi)
( +3.3V-CI )
LED-Red
LED-Green
GND
IR
Local switch Board
A27
Local switch Board for XXPQ60xx 
Local switch Board for XXPQ20/30xx 
Enter
Menu
Input
Mechanical
Power
Vol-
Vol+
CH-
CH+
D. General function defect
~PQ60xx
~PQ20/30xx
A27
Page of 70
Display

Click on the first or last page to see other 42PQ301R-ZB (CHASSIS:PP91B) service manuals if exist.

RANDOM: