Sharp LC-15B2H, Руководство по обслуживанию

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14
LC-15B2H
LC-15B2M
TROUBLE SHOOTING TABLE
(Continued)
No picture and sound
No colour
No TV
colour
No S-VIDEO colour
Yes
No
Do F3701 and F3703 function?
Chec
k all the settings on the microprocessor
’s adjust process men
u
.
No
Are secondar
y outputs
(+34V
, +15V
, +10V
, +5V
, -9V)
of
T3701 as specified?
Yes
Are the oscillation w
a
v
e
fo
rm
at T3701
’s pr
imar
y side as
specified?
Yes
No
Disconnect F3701 and F3703.
Is the load side
shor
t-circuited?
Yes
No
Is an
y of
T3701
’s pr
imar
y
side
, Q3700 and S4701 shor
t-
circuited?
Chec
k J3702, its per
ipher
al
par
ts and connection cab
le
.
Replace F3701 and F3703.
Chec
k
S4701 and
connection cab
le
.
Chec
k the secondar
y-side
load of
T3701.
Fluorescent lamp
Yes
No
Does F3703 function?
Yes
No
Is pin (34) of IC1201 at
“H
”?
Yes
No
Are the oscillation w
a
v
e
fo
rm
s
at the pr
imar
y side of
T5701
and
T5702 as specified?
Yes
Replace F3703.
No
Is input at pin (71) of IC801 as specified? Chec
k SC5001, SC line and
per
ipher
al par
ts
.
Yes
Chec
k the line
, IC1201 and
its per
ipher
al par
ts
.
Chec
k
Q5701, Q5702,
T5701,
T5702, Q5703 and
their per
ipher
al par
ts
.
Replace the fluorescent lamp and chec
k the oscillation
w
a
v
e
fo
rm
again.
No VIDEO
colour
Chec
k all the settings on the microprocessor
’s adjust process men
u
.
No COMPONENT colour
No
Is input at pins (4) and (6) of IC801 as specified?
Chec
k J3405, J3406, PB line
,
PR line and per
ipher
al par
ts
.