Sharp 25VT-CJ10, Руководство по обслуживанию

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25VT
-J100
25VT
-CJ10
19
FLOW CHART NO.2-5
FLOW CHART NO.2-7
NO SOUND
FLOW CHART NO.2-6
NO PLAYBACK PICTURE
YES
YES
Is there a signal at pin
(55) of IC401 ?
Check the TV:
TROUBLESHOOTING
"NO SOUND".
NO PLAYBACK SOUND
Check IC401, and
adjacent parts.
Check the VCR:
TROUBLESHOOTI
NG "NO SOUND".
FLOW CHART NO.2-8
Does the infrared remote control
function ?
Is 5V applied at pin (2) of the
remote control receiver ?
Is fluorescent lighting enough away
from the set ?
Is there short-circuit in the key input
or IC2001 ?
Check IC2001
Check the 5V and GND lines.
Check key input terminals.
Replace the infrared remote control
as required.
Check pin (10) of IC2001 and /or
receiver.
Reposition the set not to be
exposed to strong light.
Is "L" pulse given out of pin (1) of
the receiver and received at pin (4)
of IC2001, when the infrared remote
control is activated ?
No operation is possible from the
infrared remote control.
Does waveform appear
at pin (8) of IC351 ?
Check IC351 and
adjacent parts.
Check IC401 and
adjacent parts
Check D725, R327,
C725, C726, FB726
Does approx. 11V appear
at pin (3) of IC351 ?
Check IC401 and
adjacent parts as same
as "NO PICTURE".
Does waveform appear
at pin (54) of IC401 ?
YES
YES
YES
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Check the VCR:
TROUBLESHOOTI
NG "NO
PLAYBACK".
Is there a signal at pin
(39) of IC401 ?
INFRARED R/C TROUBLESHOOTING