Sharp VT-3428X Service Manual page 53

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VCR E - E MODE TROUBLESHOOTING
No E- E signal.
NO
Is there a signal at pin
Check the harness from f AB J to f El J and input signal line.
I
I
I
YES
Is there a signal at pin
Is there 5V at pins (26)
I
Check 42214 and El
connector.
I
I
Replace IC2201.
FLOW CHART NO. l-17
I
NO
Check the PCSV line.
YES
I
VCR SOUND TROUBLESHOOTING
I
No Sound
But audio REC is not
I
(
I
I
Is there Bias Oscillator
signal at pin (6) and
Is there an Audio
YES
pin (5) of T6601 (Bias
Signal at pin (14) of
Oscillator) ?
NO
Check the "H" level at
ES
line between pin (18)
pin (22) of IC6601 in
of IC6601 and Audio
I
Check 46606 and the
I
t
R e p l a c e IC6601. If-
I
Check pins (14)-(18)
Check the signal line
of IC660 1.
from TV mother PWB. I
1
.
NO
Is there an Audio
Signal at emitter of
YES
Y .
Is there an Audio
Signal at pin (11) of
YES
Check the signal line to the TV main PWB.
FLOW CHART NO. l-18
I
1
(
,
Is there an Audio
NO
Signal at pin (7) of
YES
h
Is there an Audio
NO
Signal at pin (8) of
YES
Is there an Audio
Signal at pin (14) of
I
I
YES
Check the 'L' level at
pin (22) of IC6601 in
Check the signal line
and
between pin (8)
I
-
Check Q6602,46601 and peripheral parts.
I

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