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Only for training and service purposes - 17 -
5. RGB PC doesn’t display
Check P300 ,
Can you see th e normal waveform?
NO JP300
may have pro blem. Repl ace this Jack.
Check the in put of RGB Audi o
switch(IC405 in the Jack Bo ard ) ,
Can you see th e normal waveform?
Check the ou tput o f RGB Aud io
switch(IC405 in the Jack Bo ard ) ,
Can you see th e normal waveform?
YES
YES
NO After chec king th e Power of RGB Aud io switc h,
you should decide to replace RGB Audio sw itch
or not.
NO After chec king th e Power of RGB Aud io switc h
you should decide to replace RGB Audio sw itch
or not.
Check the ou tput o f Main IC(IC100).
Especially you sh ould ch eck
The H,V sync and c lock .
Can you see th e normal waveform?
YES
NO After chec king th e Power of Main IC(IC100) yo u
should decide to replace Main IC or not.
This board has big probl em because Main
IC(IC100) have some troubles.
After chec king thoroughly all pa th once again,
You should decid e to replace Main Bo ard or no t.
YES
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