LG 50PQ1000-ZA (CHASSIS:PD92A) Service Manual ▷ View online
< SIF waveform – sample >
- Defend on the input signal.
- Defend on the input signal.
Making
Revision
2009. 2 . 1
PDP TV
Input
Block
Analog TV Audio Problem
Check video output
Follow procedure All source audio
trouble shooting
Y
Follow procedure analog TV
video trouble shooting
N
Replace Mstar IC (IC100)
Check R554,R557 for 5V
Check R554,R557 output
N
Y
Check SIF signal L501
Replace IC500
N
Y
Check SIF signal (R557)
Check SIF line
N
Y
Y
10/14
Check Connector and cables
JK701 (Component)
JK600.JK601 (SCART, Rear AV)
JK702 (RGB)
JK700 (Side AV)
Replace connector or
cable if found damaged
Check signal
R736 / R737 (Component1)
R738 / R739 (RGB)
R617 / R609, R654, / R652 (SCART, Rear AV)
R776 / R780 (AV Side)
Replace the Resistor
Check IC100 signal
C36,C37,C38,C39,C40,
C41,C42,C43,C44,C45
Replace Capacitor
Follow procedure
All source audio trouble shooting
Making
Revision
2009. 2 . 1
PDP TV
Input
Block
Component / AV/RGB Audio Problem
Y
Y
Y
N
N
N
11/14
< SPDIF waveform – sample >
- Defend on the input signal.
- Defend on the input signal.
Making
Revision
2009. 2 . 1
PDP TV
Input
Block
Optical Audio Problem
N
Check Signal (JK1000 #3)
Check SPDIF signal (R137)
Replace Mstar IC100
Replace JK1000
Y
Y
12/14
• Exception
- USB power could be disabled by inrushing current
- In this case, remove the device and try to reboot the TV (AC power off/on)
Making
Revision
2009. 2 . 1
PDP TV
Input
Block
USB Problem
Check USB 2.0 Cable for damage
or open conductors
Check L701 voltage level 5V
Y
N
Replace L701
Check JK706
Replace JK706
Y
N
Replace Mstar IC100
Y
Check IC400
N
Replace IC400
Y
13/14
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