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Check J603( Pin 7B) , P601 (Pin 1)
Can you see the normal waveform?
YES
J603 or SIDE AV may have problem. Replace
this Jack or SIDE AV.
After checking the Power of AV switch you
should decide to replace AV switch or not.
NO
Check the input(Pin1 or Pin22) of AV
switch(IC603). Pin1 is for video1,Pin22 is for
video 2.
Can you see the normal waveform?
NO
YES
YES
YES
YES
After checking the Power of AV switch you
should decide to replace AV switch or not.
Check the output(Pin56) of AV switch(IC603).
Can you see the normal waveform?
NO
After checking the Power of Decorder you should
decide to replace Decorder or not.
Check the input(Pin148) of Decorder(IC901).
Can you see the normal waveform?
NO
After checking the Power of Decorder you should
decide to replace Decorder or not.
Check the output signal of Decorder(IC901).
Can you see the normal waveform?
NO
This board has big problem because Main
chip(HD2.4) have some troubles.
After checking thoroughly all path once again,
You should decide to replace HD2.4 or not.
Check the input and output of HD2.4(IC401).
Especially you should chec
The H,V sync and clock.
Can you see the normal waveform?
NO
Video doesn’t display
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