Akai LEA-19A08G, Service Manual

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4.
4. 4.
4. RGB
RGB RGB
RGB PC
PC PC
PC doesn
doesn doesn
doesn
’
tttt display
display display
display
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Check CN7,
Can you see the normal waveform?
CN7 may have problem. Replace this
Jack.
Check the input of RGB Video
switch(U10) ,Can you see the normal
waveform?
After checking the Power of RGB Video
switch, you should decide to replace RGB
Video switch or not.
Check the input of RGB switch(U10) ,Can
you see the normal waveform?
After checking the Power of RGB
switch you should decide to replace RGB
Audio switch or not.
Check the output of RGB
switch(U10) ,Can you see the normal
waveform?
After checking the Power of RGB switch
you should decide to replace RGB Audio
switch or not.
Check the output of Main IC(U10).
Especially you should check The H,V
sync and clock.
Can you see the normal waveform?
After checking the Power of Main IC(U10)
you should decide to replace Main IC or
not.
This board has big problem because Main
IC(U12) have some troubles.
After checking thoroughly all path once
again, You should decide to replace Main
Board or not.