Service manual

33
LC-20B8U-S
LC-20B9U-S
LC-20B9U-SM
TROUBLE SHOOTING TABLE (Continued)
Yes
No
Yes
No
No
Yes
No
No
Yes
Yes
No
Yes
No
No
Yes
Yes
Yes
No
No
Yes
Yes
No
No colors come out.
No S video colors come out.
No input 1, input 2 colors come out.
No PC picture colors come out.
Check if the adjustment process menu of the microcomputer is set properly.
Check IC1201,
its peripheral
circuitry and the
LCD panel.
Does the test
pattern of the
LCD controller
come out
properly?
Check IC801 and
its peripheral
circuits.
Check the SC
line of J3401
and its
peripheral
parts.
Is the input at
pin (5) of
IC3401 as
specified?
Check IC3401
and its
peripheral
parts.
Is the output at pin
(45) of IC3401 as
specified?
Check the lines
of J3410 and
their peripheral
parts.
Is the input of
IC3403 as
specified?
Check IC3403
and its
peripheral parts.
Are the outputs at
pins (11) and (14) of
IC3403 as specified?
Check the input
line and its
peripheral
parts.
Is the input at pin
(31) of IC801 as
specified?
Check the output of
IC801, the input
and output of
IC1201 and their
peripheral parts.
Check the input
line and its
peripheral
parts.
Check IC8701
and its
peripheral
parts.
Check
IC8701
and its
peripheral
parts.
Check the
input line
and its
peripheral
parts.
Are the
inputs and
outputs of
IC8701 as
specified?
Is the input
of IC801 as
specified?
Check the
output of
IC801, the
input and
output of
IC1201 and
their
peripheral
parts.
Are the inputs at
pins (8), (17)
and (23) of
IC8701 as
specified?
Is the output of
IC8701 as
specified?
Check IC801
and its
peripheral
parts.
Is the input of
IC801 as
specified?
Check the output of
IC801, the input
and output of
IC1201 and their
peripheral parts.
No TV colors
come out.
No input 3,
input 4 colors
come out.