TROUBLESHOOTING OF TV SECTION
TV
TABLE
I
Set not operating
FLOW CHART NO.
KEY-IN
Is AC cord connected
Connect AC cord.
Is AC applied to line
between
and
of
A-connector ?
N O
AC cord broken.
YES
Is
blown
N O
Is
V DC applied to
I
N O
YES
YES
and
Check
and
of
?
YES
Does pulse waveform
N O
exist at line between
Is
V DC
lied to
and
of
?
line between and
of
?
I
YES
I
Check secondary circuits
of
I
I
I
YES
I
Key-in input for VCR is not received.
I
FLOW CHART
Is the key switch in good contact
Check the switch contact.
Is there short-circuit in the key
input
YES
N O
Check
and
switches for poor soldering.
Are signals received at pins
and
when the key is
Check key lines to input of
activated 7
YES
Check
,
and signal
line of serial
serial clock and
ready
.
INFRARED
WC
FLOW CHART NO.
I
No operation is possible from the
infrared remote control.
I
I
Does the infrared remote control
function
N O
Replace the infrared remote
control as required.
Is
applied at pin
of the
N O
remote control receiver
Check the
and
lines.
YES
IS
L
pulse given out of pin (
I
)
of the receiver and
at pin
Check pin
of
and /or
receiver.
$-YES ,
Is fluorescent lighting enough
N O
away from the set ?
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
I
I
Is there short-circuit in the key
input or
Check key input terminals.
I
I
YES
I
I
. - - - - - - - - - -
Summary of Contents for VT-3428X
Page 78: ...m 3428X VT 51 28X IF Pack Unit RiWOOl7CEZZ 1 4 11 l e i t 1 I 2 I 3 I 4 I 5 I 6 1 78 ...
Page 82: ...VT 3428X VT 5128X I AWIO m I Au 10 f X I 7 I 8 I 9 I 10 I 11 I 12 I 82 ...
Page 90: ...VT 3428X VT 51 28X I t 7 I 8 I 9 I 10 I 11 I 12 I ...
Page 94: ...VT 3428X W 5128X 3 7 I 8 I 9 I 10 I 11 I 12 I 94 ...
Page 96: ...VT 3428X VT 51 28X TO Y C AUDIO CIRCUIT NCR 21 I I I I 7 I 8 I 9 I 10 I 11 I 12 I 96 ...
Page 100: ...m 3428X VT 51 28X Wiring Side f r 7 I 8 I 9 I 10 I 11 I 12 1 100 ...
Page 102: ...VT 3428X VT 51 28X I 7 I 8 I 9 I 10 I 11 102 1 12 I ...
Page 104: ...VT 3428X I m 5128X 1 7 I 8 I 9 I 10 I 11 I 12 I ...
Page 123: ...MECHANISM CHASSIS PARTS G F E I i 1 I 2 I 3 I 4 I 5 I 6 I 123 ...
Page 125: ...CASSETTE HOUSING CONTROL PARTS i T 3428X VT 51 28X 1 I 2 I 3 I 4 I 5 I 6 I 125 ...
Page 127: ...VT 3428X W 51 28X MODIEL VT 3428X CABINET AND MECHANICAL PARTS 1 I 2 I 3 I 4 I 5 I 6 127 ...
Page 128: ...W 3428X VT 51 28X I IO 9 0 3 7 128 ...
Page 130: ...VT 3428X VT 5128X I 0 I 0 ...
Page 132: ...MODELS VT 3428X AND VT 51 28X CABINET AND MECHANICAL PARTS I i 1 I 2 I 3 I 4 I 5 I 6 I 132 ...
Page 136: ...S H A R P TQ0023 S Printed in Japan 0 w s MW KD ...
