LG 50PQ1000-ZA (CHASSIS:PD92A) Service Manual ▷ View online
Making
Revision
2009. 2 . 1
PDP TV
Input
Block
AV Video Problem
Check input signal format
Is it supported?
Check signal
R601,602,603,L604 (SCART1 AV),
L611 (SCART2 AV) ,R713 (Side AV),
R707(S-Video)
Replace Resistor
Check AV port of JK600,JK601 (Rear)
Check JK700 (Side), JK705(S)
Replace or reseat connector
N
Replace Mstar(IC100)
Check AV Cable / S-Video Cable for
damage or open conductors
※ Measured signals depend on the input signal.
Y
Y
Y
Y
N
6/14
Making
Revision
2009. 2 . 1
PDP TV
Input
Block
HDMI Video Problem
Check input signal format
Is it supported?
Check JK901 / J902 / J903
for proper connection or damage
Replace connector
Check HDMI Cable for damage or
open conductors
Replace Mstar(IC100)
Check HDCP (IC102)
→Power(#8) & I2C Signal (#5, #6)
Replace IC901,902,903
Replace IC102
Check Mstar(IC100)
Y
Y
Y
Y
Y
N
N
Check EDID EEPROM
(IC901,902,903)
→ Power(#8) & I2C Signal (#5, #6)
N
N
7/14
Making
Revision
2009. 2 . 1
PDP TV
Input
Block
All Input Audio Problem
Make sure you can’t hear any audio
Check SCL,SDA
R1008,R1009
Replace R1008,R1009
Check IC1000 Power
17V(C1023), 3.3V(L1002,L1003)
Check 17V (P1100 #1,2),
3.3V (IC1103 #2)
Check Connector
P1000
Check Mstar I2S Output
R143,R134,RR135,R136
Replace IC100.
Check speaker for damage.
Check IC1000 Status
PDN(#19) / Reset(#25) is High?
Check
Reset (R1005) / PDN (R1003)
:They must be High (3.3V)
Replace P1000
Replace the Speaker
Y
Y
Y
Y
Y
Y
N
N
N
N
N
N
8/14
Making
Revision
2009. 2 . 1
PDP TV
Input
Block
Digital TV / HDMI Audio Problem
Follow procedure All source audio
trouble shooting
Check EDID EEPROM
(IC901,902,903)
→ Power(#8) & I2C Signal (#5, #6)
Re-download EDID data
or Replace IC
◆ Digital TV
Check video output
Follow procedure All source audio
trouble shooting
Follow procedure digital TV
video trouble shooting
Replace Mstar IC (IC100)
Y
N
N
◆ HDMI
Y
N
9/14
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