35
LC-26DA5U
LC-32DA5U
TROUBLESHOOTING TABLE
(Continued)
YES
YES
NO
NO
NO
YES
YES
YES
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
NO
YES
YES
YES
NO
NO
NO
Are
there
digital
video
signal
inputs
at
pins
(9)~(12),
(15)~(20)
of
IC3201
(L
VDS
RECIEVER)?
Are
there
digital
video
signal
outputs
at
pins
(37)~(42),
(45)~(48)
of
IC3202
(L
VDS
TRANSMITTER)?
Are
digital
video
signals
sent
from
pins
(26)~
(31),
(34)~
(37)
of
IC3301?
Check
IC3301
and
its
peripheral
circuits.
Replace
the
main
PWB,
or
check
between
IC3301
and
IC3201.
Check
IC3201,IC3202
(L
VDS
TRANSMITTER)
and
the
peripheral
circuits.
Check
the
LCDCONTROL
PWB.
External
input
in
trouble
<INPUT
-3>
Is
INPUT
-3
selected
in
the
input
switching
menu
screen?
Is
there
signal
input
at
each
input
pin
of
IC3800
(A
V
SWITCH)?
<Composite
video
signal
input>
Is
there
signal
input
at
pin
(3)
of
IC3800?
<S-video
signal
input>
Are
there
Y-signal
input
at
pin
(5)
and
C-
signal
input
at
pin
(7)
of
IC3800?
Select
INPUT_3
and
the
input
signal
in
the
input
switching
menu
screen.
When
it
cannot
be
selected
since
the
characters
INPUT
-3
on
the
menu
screen
are
gray
.
Is
video
signal
detection
functioning
normally?
Check
between
pin
(1
1)
of
J1
106
and
pin
(12)
of
IC1
102.
Is
S-video
signal
detection
functioning
normally?
Check
between
pin
(6)
of
J1
105
and
pin
(6)
of
IC3800.
Check
between
pin
(8)
of
J1
106
and
pin
(3)
of
IC3800.
Check
between
pins
(3),
(4)
of
J1
105
and
pins
(5),
(7)
of
IC3800.
<Composite
video
signal
/S-video
signal>
input
<Composite
video
signal
input>
Are
there
VIDEO
signal
output
at
pin
(60)
of
IC3800?
<S-video
signal
input>
Are
there
Y-signal
output
at
pin
(60)
and
C-signal
output
at
pin
(59)
of
IC3800?
<Composite
video
signal
input>
Is
video
signal
sent
to
pin
54
of
AV_UNIT
connector
(FC_SC5702)?
<S-video
signal
input>
Are
Y
and
C
signals
sent
to
pins
54
and
52
of
AV_UNIT
connector
(FC_SC5702)?
No
video
output
(2)
No
video
output
when
receiving
UHF/VHF
broadcasting
Is
there
video
signal
output
at
output
pin
(17)
of
the
tuner
(TU1
101)?
Are
there
video
signal
inputs
at
pin
(7)
of
IC1
103
(LEVEL
ADJ)?
Is
tuner
video
signal
supplied
to
pin
(17)
of
IC3800
(A
V
SWITCH)?
Check
or
replace
the
tuner's
peripheral
circuits.
Are
there
inputs
of
level
adjustment
control
signals
at
pin
(6)
of
IC1
103
(LEVEL
ADJ)
from
pin
(1)
of
IC1
105?
Check
IC1
105
(CONTROL)
and
the
peripheral
circuits.
Replace
if
necessary
.
Check
IC3800
(A
V
SWITCH)
and
the
peripheral
circuits.
Check
between
IC3800
and
SC5702.
(Q3802,
Q3810,
etc.)
<Composite
video
signal
input>
Is
video
signal
supplied
to
pin
(242)
of
IC3301
through
L.P
.F
.consisting
Q3705
and
Q3710?
<S-video
signal
input>
Are
Y
and
C
video
signals
supplied
to
pins
(242)
and
(231)
of
IC3301
through
L.P
.F
.consisting
Q3705
and
Q3710
and
L.P
.F
.consist
ing
of
Q3708
and
Q3712
respectively?
Check
between
IC3800
and
IC3301.
(Q3802,
Q3810,
Q3705,
Q3710,
etc.)/
(Q3801,
Q381
1,
Q3708,
Q3712,
etc.)
<Composite
video
signal
input>
Is
video
signal
sent
to
pin
(7)
of
MAIN_UNIT
connector
(FC_SC3701)?
<S-video
signal
input>
Are
Y
and
C
signals
sent
to
pins
(7)
and
(9)
of
MAIN_UNIT
connector
(FC_SC3701)
respectively?
Check
the
FFC
harness
ÒFCÓ.
