Sharp VT-3448X, Руководство по обслуживанию

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VCR PLAYBACK MODE (LUMINANCE) TROUBLESHOOTING
VCR PLAYBACK MODE TROUBLESHOOTING
No playback.
FLOWCHART NO.
Are there Y/C data and
clock signals at pins
and
of
respectively when
playback starts ?
I I
Are there Y/C data and
clock signals at pins
and
of
respectively when
playback starts ?
I
I
I
YES
Check the pin of is
Is there SW. Pulse at
Check the SW. Pulse
pin of ?
line.
I I
I
YES
Check connector AH.
NO GOOD
.
Head
Check video head and/or
replace
I I I
Is there a signal at pin NO
of ?
YES
Is there a signal at pin NO Is there at pin
of ? and of ?
Check the line.
YES
YES
Check pin of
Check the signal line all the way up to
YES
Check the signal at pm
of
(Frequency,
ABNORMAL
(PAL), Frequency,
I - -
NORMAL
Replace
and
peripheral circuit.
C h e c k T V S e c t i o n .