Sharp LC-26GA4D, Руководство по обслуживанию

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40
LC-26GA4D
LC-26GA4U
TROUBLE SHOOTING TABLE
(Continued)
YES YES YES
YES YES
YES YES
NO NO
NO
NO
NO
NO
YES YES YES YES YES
NO NO NO NO NO NO
YES
NO NO
<Component video signal> input
No Picture (4)
Exter
nal input in troub
le <INPUT 1>
Is INPUT 1 selected in the input select men
u
screen?
Select INPUT 1 and the input signal in the input select men
u screen.
If signal name is g
ra
y
and not selectab
le in
the men
u
screen
Is component video signal detection functioning nor
mally? Chec
k betw
een pin
(11) of J1107 and pin (32) of IC1001.
Are there signal inputs at pins (53), (55) and (57) (Y
, PB
, PR) of IC3801 (COMPONENT
SWITCH)?
Chec
k betw
een J1107 and each input pin
of IC3801. Chec
k IC3700 (ADC) and the per
ipher
al
circuits
.
Are there MAIN
VIDEO signal outputs at pins (50), (48), (46) (Y
, PB
, PR) of IC3801, P
ASS
VIDEO signal outputs at pins (38), (36
), (34) (Y
, PB
, PR), and SUB
VIDEO signal outputs at pins (44), (42) and (40) (Y
, PB
, PR)?
SYSTEM (Single) <1 screen:
480i/480p/1080i/720p
, T
w
in screens:
480p/1080i/720p> Are there P
ASS
VIDEO signal inputs at pins (1),
(5) and (25) (Y
, CB
, CR) of IC3703 (L.P
.F
.)?
SYSTEM (T
win) <2 screens:
480i> Are there MAIN/SUB
VIDEO signal inputs at pins (8), (10), (13) (Y
, PB
, PR) of IC401 (MAIN L.P
.F
.) and IC501 (SUB L.P
.F
.)
Exter
nal input in troub
le <INPUT 2>
Is INPUT 2 selected in the input select men
u
screen?
Select INPUT 2 and the input signal in the input select men
u
screen.
If signal name is g
ra
y
and not selectab
le in
the men
u
screen
Is component video signal detection functioning nor
mally? Chec
k
betw
een pin
(10) of J1107 and pin (76) of IC3800.
Are there signal inputs at pins (5), (7) and (9) (Y
, PB
, PR) of IC3801 (COMPONENT
SWITCH)?
Chec
k
betw
een J1107 and each input pin
of IC3801.
Chec
k IC3801 (COMPONENT SWITCH)
and the per
ipher
al circuits
.
Chec
k
betw
een IC3801 and IC3703, and
betw
een IC3801 and IC401/IC501.
SYSTEM (1)
SYSTEM (2)
Are there signal inputs at pins (5), (13) and (20) (R, G, B) of IC3700 (ADC)?
Is there signal output of RA0-7, RB0-7, BA0-7, BB0-7, GA0-7, etc.
from each
output pin of IC3700?
Chec
k betw
een IC3703 and IC3700.
<MAIN SYSTEM> Are there signal inputs at pins (85), (92) and (94) (Y
, PB
, PR) of IC400 (MAIN
VIDEO CHR
OMA)?
<SUB SYSTEM> Are there signal inputs at pins (85), (92) and (94) (Y
, PB
, PR) of IC500 (SUB
VIDEO
CHR
OMA)?
Chec
k
betw
een IC401 and IC400.
Chec
k betw
een IC501 and IC500.
Chec
k IC500 (SUB
VIDEO CHR
OMA) and
the per
ipher
al circuits
.
Chec
k
IC 400 (MAIN
VIDEO CHR
OMA)
and the per
ipher
al circuits
.
Replace the main PWB
, or chec
k betw
een
IC400/IC500 and IC3201. Chec
k IC3201 (L
VDS
TRANSMITTER) and
the per
ipher
al circuits
.
<MAIN SYSTEM> Are there digital video signal outputs at pins (43), (44), (46)~(49), (54), (55) and (58) of IC400?
<SUB SYSTEM> Are there digital video signal outputs at pins (43), (44), (46)~(49), (54), (55) and (58) of IC500?
Are there digital video signal outputs at pins (49)(T
A1
–
), (48)(T
A1+), (47)(TB1
–
), (46)(TB1+), (44)(TC1
–
), (43)(TC1+), (41)(TCLK
–
), (42)(TCLK+), (40)(TD1
–
),
(39)(TD1+), (37)(T
A2
–
), (36)(T
A2+), (35)(TB2
–
), (34)(TB2+), (32)(TC2
–
), (31)(TC2+), (30)(TCLK2
–
),(29)(TCLK2+), (28)(TD2
–
), and (27)(TD2+) of IC3201?
Are there digital video signal inputs at pins (53), (54), (57)~(60), (51), (52) (RE0-7), pins(63)~(68), (61), (62) (GE0-7), pin
s (73)~(78), (69), (70) (BE0-7), pins
(81)~(86), (79), (80) (R
O0-7), pins (91)~(96), (89), (90) (GO0-7), pins (99), (100), (1), (2), (5), (6), (97), (98) (BO0-7), an
d pins (7)~(10) (HSYNC
,
VSYNC
, DE,
CLKIN) of IC3201 (L
VDS
TRANSMITTER)?
Chec
k the LCD CONTR
OL PWB
.