Sharp LC-15E1E (serv.man3) Service Manual ▷ View online
LC-13E1E
LC-15E1E
LC-15E1E
18
TROUBLE SHOOTING TABLE
(Continued)
No picture (3)
Check all the settings microprocessor
’s adjust process menu.
Is output of
R0~R7
normal?
Is output of
G0~G7
normal?
Is output of
B0~B7
normal?
Yes
Yes
No
No
No
Colour is
unusual
Is in/output of
SPIO and
SPOI normal?
No
No picture
image
inversion
No
Gradation
defect
Is output of U/D
normal?
Yes
No
Check R1202 and
its peripheral parts.
Check R1209 and
its peripheral parts.
Check IC1206,
IC1207, Q1201 and
their peripheral
Check R1203 and
its peripheral parts.
Check R1204 and
its peripheral parts.
Is output V0, V7, V17,
V21, V32, V64, V112,
V176, V235 and
V255 normal?
Check IC1106,
IC1107, IC1108,
IC1114, IC1115 and
their peripheral parts.
LC-13E1E
LC-15E1E
LC-15E1E
19
TROUBLE SHOOTING TABLE
(Continued)
No sound (1)
Check all the settins microprocessor
’s adjust process menu.
Is the pin (53) of
IC2001 in the
"L" state?
Is output at pins
(27) and (28) of
IC1901 normal?
Is output at pins
(1) and (7) of
IC1903 normal?
Yes
Yes
No
No
No
No sound
from front
speakers
Yes
Muting effect is
on. Check the
FSMUTE line.
Check IC1901
and its
peripheral parts.
Check IC1903
and its
peripheral parts.
Is the pin (52) of
IC2001 in the
"L" state?
Is output at pins
(24) and (25) of
IC1901 normal?
Is output at pins
(1) and (7) of
IC304 normal?
Yes
Yes
No
No
No
Yes
Muting effect is
on. Check the
HP_MUTE line.
Check IC1901
and its
peripheral parts.
Check IC304
and its
peripheral parts.
No sound
from
headphone
TV sound
failure
Is output at pins
(33) and (34) of
IC1901 normal?
Is output at pins
(1) and (7) of
IC3500 normal?
Check IC1901
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 TU1
(Tuner) normal?
Is input at pins
(67) and (69)
of IC1901.
Check IC1901
and its
peripheral
parts.
Check J5003
(Headphone Jack)
and connection
cable.
No
Is output at pins
(8) and (12) of
IC3305 normal?
Check IC3305
and its
peripheral parts.
Check front
speaker and
connection
cable.
Yes
LC-13E1E
LC-15E1E
LC-15E1E
20
TROUBLE SHOOTING TABLE
(Continued)
No sound (2)
Check all the settings microprocessor
’s adjust process menu.
Yes
No
No
No sound from SCART
No
SCART sound failure
Yes
No
Check IC1901 and its
peripheral parts.
Is output at pins (36) and (37) of
IC1901 normal?
Check IC1902 and its
peripheral parts.
Is output at pins (1) and (7) of
IC1902 normal?
Check their lines and their
peripheral parts.
Is input at pins (53) and (54) of
IC1901 normal?
Check IC1901 and its
peripheral parts.
Is output at pins (27) and (28) of
IC1901 normal?
LC-13E1E
LC-15E1E
LC-15E1E
20
TROUBLE SHOOTING TABLE
(Continued)
No sound (2)
Check all the settings microprocessor
’s adjust process menu.
Yes
No
No
No sound from SCART
No
SCART sound failure
Yes
No
Check IC1901 and its
peripheral parts.
Is output at pins (36) and (37) of
IC1901 normal?
Check IC1902 and its
peripheral parts.
Is output at pins (1) and (7) of
IC1902 normal?
Check their lines and their
peripheral parts.
Is input at pins (53) and (54) of
IC1901 normal?
Check IC1901 and its
peripheral parts.
Is output at pins (27) and (28) of
IC1901 normal?
