Sharp LC-26AF3 M/H/X Service Manual page 42

LC-26AF3 M/H/X
LC-32AF3 M/H/X
LC-37AF3 M/H/X
TROUBLE SHOOTING TABLE
When EXT2 is used for external input>
XT2 in trouble.
Confirmation of the settings:
1) Is "INPUT SOURC " button
2) Is M NU-PICTUR -CONTRAST/BRIGHTN SS set to "MIN"?áááSet it to an appropriate level.
3) Check the connection to the external deviceáááConnect it correctly as per the operation manual for the device.
Is composite video Check external
signal sent to pin connection, input
NO
(20) of SCART2 setting, SCART2
(SC1200)? (SC1200) and
peripheral circuits.
YES
Is the composite
Check SCART2
video signal (IN2-
NO (SC1200) and
V) sent to input
peripheral circuits.
terminal pin (77) of
IC1203 (V-
S L CTOR)?
YES
Is the composite
Check IC1203 (V-
video signal
S L CTOR) and
NO
(CVBS) sent from
peripheral circuits.
output terminal pin
(51) of IC1203 (V-
S L CTOR)?
YES
Is the composite Check IC3300 (V-
video signal PROC SSOR),
NO
(CVBS1) sent to Q3706/Q3707 and
input terminal pin peripheral circuits.
(242) of IC3300 (V-
PROC SSOR)?
YES
Is LVDS signal (TA± - TD±) sent from pins (36) and (37) - (26) and (27) of IC3300 (V-PROC SSOR), and is CLK signal
(RCLK1±) sent from pin (28)/(29)?
Is the digital signal (RMS/GMS/BMS) sent from pins (27) and (34) - (47) and (50) of IC4601 (LVDS-R C IV R), and is SYNC
signal (HS/VS) sent from pin (3)/(5)?
Is digital RGB-right signal (RR**/RG**/RB**) sent from pins (203) and (2) - (16) and (23) of IC4502 (LCD-CONTROL), and is
digital RGB-left signal (LR**/LG**/LB**) sent from pins (26) and (33)- (47) and (54)?
Is digital RGB signal sent to pins (14) and (21) - (42) and (49) of LCD-CONN CTOR SC4651/4652?
No picture (4)
XT2-RGB in trouble.
on the remote control set up correctly?áááSee the operation manual and set "INPUT SOURC " to " XT2".
Is RGB signal sent
to pins (15), (11)
and (7) of SCART2
(SC1200)?
YES
Are RGB signals
(R2, G2 and B2)
sent to input terminal
pins (31), (27) and
(29) of IC1203 (V-
S L CTOR)?
YES
Is RGB signal
(R/G/B-SIG) sent
from output terminal
pins (54), (56) and
(55) of IC1203 (V-
S L CTOR)?
YES
Is RGB signal
(R/G/B-SIG3) sent
to input terminal
pins (54), (48) and
(43) of IC3701
(A/D-CONV)?
YES
Is digital signal
(R/G/B-8bit) sent to
input terminal pins
(45/69) - (55/46) of
IC3300 (V-
PROC SSOR)?
YES
YES
YES
YES
YES
Check the LCD panel.
(Continued)
XT2-Y/C in trouble.
Check external Is Y/C signal sent
connection, input to pins (20) and
NO
setting, SCART2 (15) of SCART2
(SC1200) and (SC1200)?
peripheral circuits.
Is Y/C signal (IN2-
Check SCART2
Y/C2) sent to input
NO (SC1200) and
terminal pins (79)
peripheral circuits.
and (1) of IC1203
(V-S L CTOR)?
Is Y/C signal (Y/C-
Check IC1203 (V-
SIG) sent from
S L CTOR) and
NO
output terminal
peripheral circuits.
pins (52) and (50)
of IC1203 (V-
S L CTOR)?
Check pins (54), Is Y/C signal
(56) and (55) of (CVBS2/C-SIG1)
NO
IC1203 (V-S L), sent to input
Q3712/11/10 and terminal pins (244)
peripheral circuits. and (231) of
IC3300 (V-
PROC SSOR)?
Check pins (66)
and (64) for AD-
NO
HS/VS signal,
IC3701 (A/D-
CONV) and
peripheral circuits.
42
Check external
connection, input
NO
setting, SCART2
(SC1200) and
peripheral circuits.
YES
Check SCART2
NO (SC1200) and
peripheral circuits.
YES
Check IC1203 (V-
S L CTOR) and
NO
peripheral circuits.
YES
Check IC3300 (V-
PROC SSOR),
NO
Q3708/Q3709 and
peripheral circuits.
YES
Check IC3300, pins
NO
(28) and (29) for
RCLK signal, and
peripheral circuits.
Check IC4601, pins
NO
(3) and (5) for
HS/VS signal, and
peripheral circuits.
Check IC4502 and
NO
peripheral circuits.
Check IC4502,
NO
LCD-
CONN CTOR,
SC4651/4652 and
peripheral circuits.