Sharp AQUOS LC-20B5M, Руководство по обслуживанию

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25
LC-20B5M
TROUBLE SHOOTING TABLE
(Continued)
No picture (1/2)
No picture at all
No
TV
, VIDEO
1,
VIDEO
2
and
VIDEO 3 outputs
No TV
output
No
VIDEO 1 output
No
VIDEO 2 output
Check all the settings on the microprocessor'fs adjust process menu.
NO
NO
NO
NO
NO
NO NO
NO
NO NO NO
NO
YES
YES
YES
YES
YES
No S-VIDEO output
No COMPONENT output
YES YES YES
YES
No picture (2/2)
No PC car
d output
Chec
k all the settings on the microprocessorÅfs adjust process men
u.
NO NO NO NO
YES YES YES YES
Are the input/output at IC8801 nor
mal?
Are the input/output at IC3401 nor
mal?
Chec
k
IC3401 and its per
ipher
al
circuits
.
Chec
k the
po
w
er supply
line
.
Is the input at pin (1) of IC3401 nor
mal?
Is the input at pin (8) of IC3401 nor
mal?
Is the input at pins (71) and (72) of IC8801 nor
mal?
Is the input at pins (4), (5), (6) and (75) of IC8801 nor
mal? (D1)
Is the input at pins (43),
(48) and (54) of IC8701 nor
mal? (D2)
Chec
k the D
VD_Y
, CB and
CR lines of J2205 and their per
ipher
al circuits
.
Chec
k the SY and SC
lines of J3401 and their per
ipher
al
circuits
.
Is the output at IC3401 nor
mal?
Is the output at IC3401 nor
mal?
Chec
k
IC3401 and its per
ipher
al
circuits
.
Chec
k
IC3401 and its per
ipher
al
circuits
.
Chec
k that
line
.
Chec
k that
line
.
Is the v
oltage
at pins (6), (7) and (9) of the tuner nor
mal?
Is the output at pin (19) of the tuner nor
mal?
Is the input at pin (47) of IC3401 nor
mal?
Is the output at IC3401 nor
mal?
Chec
k that
line
.
Chec
k
IC3401 and its per
ipher
al
circuits
.
Are the card medium and its files nor
mal?
Chec
k the
medium and its files
.
Is the output at IC8602 and IC8603 nor
mal?
Chec
k that
line
.
Replace the card unit.
Is the v
oltage at
pins (2) and (3) of P5001 in the PC card unit nor
mal?
Chec
k the
po
w
er supply
line
.
Is the v
oltage at
pins (1), (2) and (3) of IC5004 and at pins (1), (2) and (3) of IC5005 nor
mal?
Chec
k the
po
w
er supply
line
.
Chec
k the
tuner and its per
ipher
al
circuits
.
Chec
k that
line
.
Is the input at pin (73) of IC8801 nor
mal?
Chec
k the
A
V1 line of
IC8801 and its per
ipher
al
circuits
.
Are the input/output at IC1201 nor
mal?
Chec
k the v
oltage and
w
a
v
es at the liquid
cr
ystal panel.
Chec
k
IC1201 and its per
ipher
al
circuits
.
Chec
k
IC8801 and its per
ipher
al
circuits
.
Are inputs and outputs of Q1602, Q1604 and Q1606 as specified?
Chec
k
Q1602, Q1604, Q1606 and its per
ipher
al
par
ts
.
Is output at pins (57)~(59) of IC1601 nor
mal?
Chec
k the
R, G and B line
.
Is input at pin (21) of IC1601 nor
mal?
Chec
k V2V0
line and its per
ipher
al
par
ts
.
Chec
k
IC1601 and its per
ipher
al
par
ts
.
No TELE TEXT
output
No
Yes
Yes
No
No
Yes