Specifications
46
LC-20D30U
TROUBLE SHOOTING TABLE (Continued)
No pictures come out (1/3).
All pictures do not come out.
No TV pictures come out.
No Input 2 pictures come out. No Input 3 pictures come out.
Check if the adjustment process menu of the microcomputer is set properly.
No No No No No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No S video pictures come out.
No
No
Yes
Yes
Yes
Does the
test pattern
of IC801
come out?
Are the
input and
output of
IC801 as
specified?
No TV, Input 2 or Input 3
pictures come out.
Check
IC801 and
its
peripheral
circuitry.
Is the input
at pin (40)
of IC801
as
specified?
Check the
IC801 VIDEO
line and its
peripheral
parts.
Is the output
at pin (17) of
the tuner as
specified?
Are the
input and
output of
IC3402 as
specified?
Check
IC3402 and
its peripheral
parts.
Check the
power supply
line.
Check the
line in
question.
Check
IC3402 and
its peripheral
parts.
Check the
tuner and its
peripheral
parts.
Check the line
in question.
Check
IC3402 and
its peripheral
parts.
Are the
voltages at
pins (3), and
(15) of the
tuner as
specified?
Is the input
at pin (5) of
IC3402 as
specified?
Is the
output at
pin (7) of
IC3402 as
specified?
Check the
line in
question.
Is the
output at
pin (7) of
IC3402 as
specified?
Is the input
at pin (1) of
IC3402 as
specified?
Check the
line in
question.
Check
IC3402 and
its peripheral
parts.
Is the input
at pin (3) of
IC3402 as
specified?
Is the
output at
pin (7) of
IC3402 as
specified?
No
No
Yes Yes
Is the input
at pin (40)
of IC801 as
specified?
Is the input
at pin (40)
of IC801 as
specified?
Check
IC801 and
its input
line and
peripheral
parts.
Check
IC801 and
its input
line and
peripheral
parts.
Check
IC801 and
its input
line and
peripheral
parts.
Check the
SY line, SC
line and
peripheral
parts of
J3406.
Check
J3406 and
its
peripheral
parts.
No
Are the
inputs at
pins (31)
and (40) of
IC801 as
specified?
No Input 1 pictures come out.
No
Yes
No
Yes
Check the input line
and its peripheral
parts.
Check IC8701 and
its peripheral parts.
Check IC801 and its
peripheral parts.
No
Yes
Is the output of IC8701
as specified?
Are the inputs at pins (15),
(17) , (18) and (20) of
IC8701 as specified?
Is the input of IC801 as
specified?
Check the output of IC801,
the input and output of
IC1203 and their
peripheral parts.