Sharp LC-15B2H, Руководство по обслуживанию

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13
LC-15B2H
LC-15B2M
TROUBLE SHOOTING TABLE
No picture at all
Yes
No
Are inputs and outputs of IC801 as specified?
Chec
k all the settings on the microprocessor’
s adjust process men
u.
No picture
Chec
k IC801
and its per
ipher
al
par
ts
.
Yes
No
Are inputs and outputs of IC1201 as specified?
Chec
k
IC1201 and its per
ipher
al
par
ts
.
Chec
k LCD
panel v
oltage
and wav
e
fo
rm
.
No TV
and
VIDEO 1 output
Yes
No
Are inputs and outputs of IC402 as specified?
Chec
k IC402
and its per
ipher
al
par
ts
.
No
Is input at pin (73) of IC801 as specified?
Chec
k IC801,
A
V1 line and
their per
ipher
al
par
ts
.
No TV output
Yes
No
Are v
oltages
at pins (6), (7) and (9) of tuner as specified?
Chec
k the
po
w
er line
.
Yes
No
Is output at pin (19) of tuner as specified?
Chec
k the
tuner and its per
ipher
al
par
ts
.
No
Is input at pin (3) of IC402 as specified?
Chec
k the
line in question.
Yes
Chec
k IC402
and its per
ipher
al
par
ts
.
Yes
No
Are pins (2) and (4) of IC402 at
“H”
and “L
”
respectiv
ely?
Are pins (65) and (66) of IC2001 at
“H”
and “L
”
respectiv
ely?
No VIDEO 1 or 2 output
Yes
No
Is input at pins (1) or (5) of IC402 as specified?
Chec
k the
line in question.
Yes
No
Are pins (2) and (4) of IC402 both at “L
” or pins (4)
of IC402 at “H”?
No S VIDEO output
No
Are inputs at pins (71) and (72) of IC801 as specified?
Chec
k
SC5001, SY line
, SC line
and per
ipher
al
par
ts
.
No COMPONENT output
No
Is input at pins (4), (5), (6) and (75) of IC801 as specified?
Chec
k J3404,
J3405, J3406, D
VD-Y line
,
PB line
, PR
line and per
ipher
al
par
ts
.
Are pins (65) and (66) of IC2001 both at
“L
” or pins
(66) of IC1201 at “H”?
Chec
k IC402
and its per
ipher
al
par
ts
.
Yes
Chec
k the
line in question.
Yes
Chec
k the
line in question.