Sharp LC-13S1E (serv.man8) Service Manual ▷ View online
21
LC-13S1E
LC-15S1E
LC-15S1E
TROUBLE SHOOTING TABLE
(Continued)
No sound (1/2)
Check all the settings microprocessor's adjust process menu.
Is the pin (53) of
IC2001 in the
"L" state?
Is output at pins
(27) and (28) of
IC1900 normal?
Yes
Yes
No
No
No
No sound
from front
speakers
Yes
Muting effect is
on. Check the
FSMUTE line.
Check IC1900
and its
peripheral parts.
Is the pin (52) of
IC2001 in the
"L" state?
Is output at pins
(24) and (25) of
IC1900 normal?
Is output at pins
(1) and (7) of
IC350 normal?
Yes
Yes
No
No
No
Yes
Muting effect is
on. Check the
HP_MUTE line.
Check IC1900
and its
peripheral parts.
Check IC350
and its
peripheral parts.
No sound
from
headphone
TV sound
failure
Is output at pins
(33) and (34) of
IC1900 normal?
Is output at pins
(1) and (7) of
IC3500 normal?
Check IC1900
and its
peripheral parts.
Check IC3500
and its
peripheral parts.
Yes
No
No
No
No sound
from output
line
Check the tuner
and its
peripheral parts.
Yes
No
Is output at pin
(11) of Tuner
normal?
Is input at pin
(67) of IC1900.
Check IC1900
and its
peripheral
parts.
Check
Headphone Jack
and connection
cable.
No
Is output at pins
(8) and (12) of
IC3301 normal?
Check IC3301
and its
peripheral parts.
Check front
speaker and
connection
cable.
Yes
Is output at pins (1)
and (7) of IC1902,
IC1903 and IC1904
normal?
Check IC1902,
IC1903, IC1904 and
their peripheral parts.
22
LC-13S1E
LC-15S1E
LC-15S1E
TROUBLE SHOOTING TABLE
(Continued)
No sound (2/2)
Check all the settings microprocessor
’s adjust process menu.
Yes
No
No
No sound from SCART
No
SCART sound failure
Yes
No
Check IC1900 and its
peripheral parts.
Is output at pins (36) and (37) of
IC1900 normal?
Check IC1901 and its
peripheral parts.
Is output at pins (1) and (7) of
IC1901 normal?
Check their lines and their
peripheral parts.
Is input at pins (53) and (54) of
IC1900 normal?
Check IC1900 and its
peripheral parts.
Is output at pins (27) and (28) of
IC1900 normal?
22
LC-13S1E
LC-15S1E
LC-15S1E
TROUBLE SHOOTING TABLE
(Continued)
No sound (2/2)
Check all the settings microprocessor
’s adjust process menu.
Yes
No
No
No sound from SCART
No
SCART sound failure
Yes
No
Check IC1900 and its
peripheral parts.
Is output at pins (36) and (37) of
IC1900 normal?
Check IC1901 and its
peripheral parts.
Is output at pins (1) and (7) of
IC1901 normal?
Check their lines and their
peripheral parts.
Is input at pins (53) and (54) of
IC1900 normal?
Check IC1900 and its
peripheral parts.
Is output at pins (27) and (28) of
IC1900 normal?
22
LC-13S1E
LC-15S1E
LC-15S1E
TROUBLE SHOOTING TABLE
(Continued)
No sound (2/2)
Check all the settings microprocessor
’s adjust process menu.
Yes
No
No
No sound from SCART
No
SCART sound failure
Yes
No
Check IC1900 and its
peripheral parts.
Is output at pins (36) and (37) of
IC1900 normal?
Check IC1901 and its
peripheral parts.
Is output at pins (1) and (7) of
IC1901 normal?
Check their lines and their
peripheral parts.
Is input at pins (53) and (54) of
IC1900 normal?
Check IC1900 and its
peripheral parts.
Is output at pins (27) and (28) of
IC1900 normal?
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