Rgb Signal Check - Sharp XV-Z3000 Service Manual

RGB signal check

Send RGB signal from
INPUT 5.
Select INPUT 5 using keys
on the main unit or the
remote control.
YES
Is image displayed
normally?
NO
Are picture signals sent to
TL3001, TL3002 and
TL3003?
YES
Is 3.3V applied to TL1707?
YES
Is 3.3V applied to pin(5) of
Q3002?
YES
Is 3.5V applied to TL1704?
YES
Check IC3001 and
peripheral circuits.
YES
End
Check Q4003, Q4004,
NO
Q4005 and the peripheral
circuits.
NO
Check IC1705 and
peripheral circuits.
NO
Check Q3002 and
peripheral circuits.
NO
Check IC1702 and
peripheral circuits.
35
XV-Z3000
DT-500