Sharp VT-3448X Service Manual page 59

No E-E signal.
Check parts around the
Is there an Audio
NO audio inputs jack, and
signal at pin (42) of
output circuit in TV tuner.
I I
YES
Is there supply
voltage of 5V feed to
pin (14) of IC2201 ?
YES
Are there the serial Check between pins (17)
date and clock NO
and (18) of IC2201 and all
signal at pins (17)
the way thru to pins (27) and
and (18) IC2201 ?
YES
Is voltage of pins (41) and
YES
Is there "L" level at pin (52)
of IC2201.
NO
YES
Replace
I (H) line.
VCR SOUND TROUBLESHOOTING
No Sound.
No record.
.
I
YES
Is there a signal at pin
YES
I
Is there supply voltage of NO
Is there a signal
1
Is there an Audio signal at
pin (40) of IC2201 ?
I
YES
YES
Check BIAS CTL (H) z
line.
normally ?
YES
Replace IC2201.
I I
Check PC 9V line.
Check MH-AA harness
and A/C head.
1
YES
Check line between pin (46) of IC2201 and the audio
speaker output.
FLOWCHART NO. 1-17
No playback.
Is there "L" level at
pin (32) of IC2201 ?
YES
YES
1
I
I
Clean A/C head.
I
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