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TROUBLESHOOTING GUIDE
NO E-E(VIDEO AND
AUDIO FROM TUNER)
Yes
No
No
Yes
CHECK AUDIO
CHECK VIDEO
No
Yes
No
Yes
Replace TU6001.
No
Yes
Is there VIDEO
waveform at emitter
of Q6603 ?
No
Yes
Check IC5501.
Check IC6601.
Does VIDEO signal
appear at pin 24
of TU6001 ?
Disconnect the plugs from the
VIDEO/AUDIO input jacks.
Are the plugs connected
to the VIDEO/AUDIO
input jacks ?
Does AUDIO signal
appear at pin 21
of TU6001 ?
No
Yes
Is there VIDEO waveform
at pin 52 of IC4001 ?
Check IC4501.
Does AUDIO signal
appear at pin 1 and 2
of IC6601 ?
Do the voltages appear
at each terminal PB(5V),
TU(32V) and B+(5V) of
TU6001 ?
Check Power Block.
Replace Q6603.
Check IC4001.
E-22