Sharp VT-3448X, Руководство по обслуживанию

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TV TABLE
Set not operating
FLOWCHART NO.
KEY-IN TROUBLESHOOTING
Key-in input is not received.
FLOWCHART NO.
.
I ,
NO
Is AC cord connected ? Connect AC cord.
YES
Is AC applied to line
between and of AC cord broken.
I
I I
I
Is blown ?
Is DC applied to
?
and of ?
NO
Is the key switch in good contact ? Check the switch contact.
YES
Is there short-circuit in the key input ?
Check and
switches for poor soldering.
Are signals received at pins and
of when the key is activated ?
Check key lines to input of
Check and signal line of serial
serial clock and ready
INFRARED R/C TROUBLESHOOTING
No operation is possible from the
infrared remote control.
FLOWCHART NO.
Does the infrared remote control Replace the infrared remote control
a s r e q u i r e d .
I
1
Is applied at pin of the remote
control receiver ?
Check the and lines.
I
I
YES
Is pulse given out of pin of the
Check pin of and/or
receiver and received at pin of
when the infrared remote
I
Is fluorescent lighting enough away Reposition the set not to be exposed
from the set
to strong light.
YES
Is there short-circuit in the key input
or
?
Check key input terminals.
I
I
I
I
YES
Check ICI and signal line of
serial serial clock and ready