Sharp LC-13SH1E Service Manual

21
LC-13SH1E
LC-15SH1E
TROUBLE SHOOTING TABLE
No No
No Yes
Yes
Yes
Yes
Yes No
No
Yes
No
Yes
Yes
No
No
Yes
No
Yes
No
Yes
No picture and No sound
Back light lamp failure to light up
Replace F7701.
Is Q7702 base
voltage at "L"
state?
Check all output
voltage line for
short circuit.
Do fuse F7701
function?
Are T7701 secondary
output at C7720,
C7721, C7722, C7723
and C7725 voltage
normal?
Check Q6700-
Q6702, Q6707-
Q6709 and their
peripheral parts for
short circuiting.
Is there any short
circuit in INV +B
line?
Check the OFL1
line, OFL2 line,
IC1201 and their
peripheral parts.
Check the OFL line,
Q3600, Q3601 and
their peripheral
parts.
Check Q6700-
Q6702, Q6707-
Q6709 and their
peripheral parts.
Replace the back
light lamp with new
one and check
again.
Do fuse F6700,
F6702 function?
Are the pins (40)
and (138) of IC1201
in the "H" state?
Are the outputs of
Q3600 and Q3601
in the "L" state?
Is the pins (4) and
(7) of T6701-T6704
normal?
Is the pin (10) of
T6701 normal?
Check the error
amp circuit D6705,
D6707, D6710,
D6712, D6715,
D6716, Q6706,
Q6713 and their
peripheral parts.
Remove F7701 and
check the load side.
Is there short-
circuit?
Is there any short-
circuit in T7701
primary side
periphery?
Check IC7702,
IC7704 and their
peripheral parts.
Check IC7701 and
its peripheral parts.
Is T7701 primary
switching waveform at
pin (1) of IC7701
normal?

Sharp LC-13SH1E Specifications

General

Brand	Sharp
Model	LC-13SH1E
Category	LCD TV
Language	English