Read Sharp LC-15B5E (serv.man9) Service Manual online
25
LC-15B5E
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
Check IC3201
and its peripheral
parts.
Is output at pins
(36) and (37) of
IC3201 normal?
Check IC3210
and its peripheral
parts.
Is output at pins
(1) and (7) of
IC3210 normal?
Check their lines
and their
peripheral parts.
Is input at pins
(2) and (4) of
IC3401 normal?
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
IC3201 normal?
Yes
Yes
No
No
No
No sound
from front
speakers
Yes
Muting effect is
on. Check the
FSMUTE line.
Check IC3201
and its
peripheral parts.
Is the pin (52) of
IC2001 in the
"L" state?
Is output at pins
(24) and (25) of
IC3201 normal?
Is output at pins
(1) and (7) of
IC3305 normal?
Yes
Yes
No
No
No
Yes
Muting effect is
on. Check the
HP_MUTE line.
Check IC3201
and its
peripheral parts.
Check IC3305
and its
peripheral parts.
No sound
from
headphone
TV sound
failure
Is output at pins
(33) and (34) of
IC3201 normal?
Is output at pins
(1) and (7) of
IC3211 normal?
Check IC3201
and its
peripheral parts.
Check IC3211
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
(14) of Tuner
normal?
Is input at pin
(67) of IC3201.
Check IC3201
and its
peripheral
parts.
Check
Headphone Jack
and connection
cable.
No
Is output at pins
(8) and (12) of
IC3304 normal?
Check IC3304
and its
peripheral parts.
Check front
speaker and
connection
cable.
Yes
Is output at pins
(1) and (7) of
IC3301 normal?
Check IC3301
and its
peripheral parts.
