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TROUBLESHOOTING OF TV SECTION
TV TROUBLESHOOTlNG TABLE
I
Is AC applied to line
between (1) and (3) of
A-connector ?
NO
Is 350 V DC applied to
Is F701 blown 1
NO
YES
Does pulse waveform
exist at line between (1)
and (2) of IC701 ?
I
Check secondary circuits
of D751--0755, L751,
. - - - - - - - - - -
FLOW CHART NO. 2-l
Set not operating
Is AC cord connected 7
Connect AC cord.
NO
AC cord broken.
YES
I
YES
Check R702, R703 and
of IC701 ?
YES
Is 600 V DC ap lied to
NO
of IC701 ?
I
I
I
Key-in input for VCR is not received.
Is the key switch in good contact ?
Is there short-circuit in the key
input ?
Are signals received at pins (1) (2) I NO
and (16) IClOOl when the key is
activated 7
Check IClOOl , IC8801 and signal
line of serial datas, serial clock and
ready (L) .
INFRARED
I
No operation is possible from the
infrared remote control.
I
YES
Does the infrared remote control
function 7
Is 5V applied at pin (2) of the
remote control receiver 7
IS
L
of the receiver and received at pin
$-YES
Is fluorescent lighting enough
away from the set ?
I
Is there short-circuit in the key
input or IClOOl ?
I
KEY-IN TROUBLESHOOTlNG
FLOW CHART NO.24
I
Check the switch contact.
Check IClOOl (iX2604CE) and
NO
switches for poor soldering.
Check key lines to input of IClOOl.
FLOW CHART NO. 2-3
WC
I
I
NO
Replace the infrared remote
control as required.
NO
Check the SV and GND lines.
)
Check pin (5) of IClOOl. and /or
I
receiver.
,
NO
R e p o s i t i o n t h e s e t n o t t o b e
exposed to strong light.
.
,
I
Check key input terminals.
I
I
I
I
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