E-5
TROUBLESHOOTING GUIDE
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NO
YES
NO
Is the voltage DC 5V for
IC604 6th pin or not?
Investigate P.CON 5V line.
Whether is a luminance
signal early in IC604
56th pin or not?
Investigate IC604.
YES
NO
Whether is a luminance
signal early in IC4001
29th pin or not?
Investigate IC4001.
YES
NO
YES
R, G, B signal out from
the 17th pin, the 18th
pin and 19th pin?
Investigate IC604 and a
peripheral circuit.
Investigate a transistor of CRT
PCB.