JVC TV-20F242 Service Manual page 37

An only horizontal line appears
Is the waveform of the
1st pin of IC401 normal?
YES
The 6th pin of IC401
does it exist DC25V?
YES
Investigate IC401,CP401 and
the peripheral circuit.
Screen display doesn't appear
The wave form of the 62nd
pin, the 63rd pin, the 64th
pin of IC1001 normal?
YES
The wave form of the 14th
pin, 15th pin and 16th pin
of IC601 normal?
YES
Investigate IC601 and the
peripheral circuit.
NO
NO
NO
NO
Investigate the IC601 and the
peripheral circuit.
Investigate D411,R452 and a
peripheral circuit.
Investigate IC1001 and the
peripheral circuit.
Investigate the circuit of IC601
from IC1001.
37