Read LG 32LG60UD (CHASSIS:LB81B) Service Manual online
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3. AV doesn’t display
Check JK601, JK602
Can you see the normal waveform?
YES
NO
JK601, JK602 may have problem. Replace this
Jack.
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO
After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main IC(IC100)
have some troubles.
After checking thoroughly all path once again, You
should decide to replace Main Board or not.
4. Component doesn’t display
Check JK501, JK502.
Can you see the normal waveform?
Check the input (output) of Component Video
switch(IC500) ,
Can you see the normal waveform?
YES
YES
NO
JK501, JK502 may have problem. Replace this Jack.
NO
After checking the Power of component Video
switch(IC500) , you should decide to replace
component video switch or not.
Check the output of Main IC(IC100).
Especially you should check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO
After checking the Power of Main IC(IC100) you
should decide to replace Main IC or not.
This board has big problem because Main IC(IC100)
have some troubles.
After checking thoroughly all path once again, You
should decide to replace Main Board or not.
Check the input (output) of Component Audio
switch(IC801) ,
Can you see the normal waveform?
YES
NO
After checking the Power of component Audio
switch(IC801) , you should decide to replace
component Audio switch or not.
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