LG 37LC7D - Page 41

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- RGB_PC doesn't display
Check input connect P7004.
Can you see the normal waveform?
Check the input of Component
switch(IC5002).
Can you see the normal waveform?
Check the output of Component
switch(IC5002).
Can you see the normal waveform?
Check the input of MST3361(IC7004
Pin41,44,46).
Can you see the normal waveform?
YES
YES YES
NO
P7004 may have problem. Replace this Jack.
Check the output of MST3361(IC7004 ).
Can you see the normal waveform?
YES
Check the input and output of
BCM3550(IC4006). Especially you should
check
The H,V sync and clock.
Can you see the normal waveform?
YES
NO
After checking the input TR of RGBHV, you
should decide to replace these components or
not.
NO NO
After checking the Power of MST3361 you
should decide to replace MST3361 or not.
NO
YEX
This board has big problem because Main
chip(BCM3550) have some troubles.
After checking thoroughly all path once again,
You should decide to replace BCM3550 or not.
After checking the Power of RGB switch you
should decide to replace component switch or
not.
After checking the Power of MST3361 you
should decide to replace MST3361 or not.