Advertisement
TROUBLESHOOTING GUIDE
NO E-E(VIDEO AND
AUDIO FROM TUNER)
No
Do the voltages appear at
< each terminal B+(5V),
No
Check R4026, R4025
PB(5V), TU(32V) and B+(9V)
and peripheral circuit.
of TU6001 ?
CHECK AUDIO
Does AUDIO signal
appear at pin 14
of TU6001 ?
CHECK VIDEO
Does VIDEO signal
appear at pin 18
of TU6001 ?
Replace TU6001
Is there VIDEO
waveform at emitter
of Q6001 ?
Is the voltage at base
of Q6601 low ?
Replace Q6001.
Check R6624 and R6636.
Is the voltage at pin 58
of 101006 LOW ?
Is there VIDEO waveform
at pin 39 of IC4001 ?
Check J4201.
Replace
14001.
Check Q1013.
Replace 1C1006,
45
Advertisement
