Sharp LC-15B9U-S Service Manual - Page 31

Check the SC

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No TV colors come out. No colors come out. No input 2, input 3 colors come out. No S video colors come out. No input 1 colors come out. Check if the adjustment process menu of the microcomputer is set properly. TROUBLE SHOOTING TABLE (Continued) 31 Check the LCD panel. No Does the test pattern of the LCD controller come out properly? Yes Check IC801 and its peripheral circuits. Check the SC line of J3401 and its peripheral parts. No Is the input at pin (5) of IC3401 as specified? Yes Check IC3401 and its peripheral parts. No Is the output at pin (45) of IC3401 as specified? Yes Check the input No Is the input at pin line and its (31) of IC801 as peripheral specified? parts. Yes Check the output of IC801, the input peripheral parts. Check the lines of J3405, J3401 and their peripheral No Is the input of IC3403 as specified? Yes Check IC3403 No Are the outputs at and its pins (11) and (14) of peripheral parts. IC3403 as specified? Yes Check No Are the IC8701 inputs and and its outputs of peripheral IC8701 as parts. specified? Yes Check the No Is the input input line of IC801 as and its specified? peripheral parts. Yes Check the output of IC801, the input their peripheral parts. LC-13B8U-S LC-15B8U-S LC-15B9U-SM

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31
LC-13B8U-S
LC-15B8U-S
LC-15B9U-SM
TROUBLE SHOOTING TABLE
(Continued)
Yes
No
Yes
No
No
Yes
No
No
Yes
Yes
No
Yes
No
No
Yes
Yes
No colors come out.
No S video colors come out.
No input 1 colors come out.
Check if the adjustment process menu of the microcomputer is set properly.
Check 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 J3405,
J3401 and their
peripheral
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
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 their
peripheral
parts.
No TV colors
come out.
No input 2,
input 3 colors
come out.