Read Sharp LC-32P50E (serv.man9) Service Manual online
LC-26P50E
LC-32P50E
LC-37P50E
LC-32P50E
LC-37P50E
42
TROUBLE SHOOTING TABLE
(Continued)
EXT3 in trouble.
Confirmation of the settings:
1) Is "INPUT SOURCE" button
on the remote control set up correctly?áááSee the operation manual and set "INPUT SOURCE" to "EXT1".
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS 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.
EXT3-COMPONENT (Y, Pb and Pr) in
trouble.
EXT3-Y/C in trouble.
NO
Is composite video
signal sent to pin
(5) of A/V-IN-
TERMINAL
(J1202)?
Check external
connection, input
setting, A/V-IN-
TERMINAL (J1202)
and peripheral
circuits.
Is IN3-Y signal sent
to pin (6) of A/V-IN-
TERMINAL (J1201),
and is Cb/C/r signal
sent to pins (4) and
(6) of A/V-IN-
TERMINAL (J1201)?
NO
Check external
connection, input
setting, A/V-IN-
TERMINAL
(J1201/1202) and
peripheral circuits.
Is Y/C signal sent
to pins (3) and (4)
of S-TERMINAL
(J1200)?
NO
Check external
connection, input
setting, S-
TERMINAL
(J1200) and
peripheral circuits.
NO
Is the composite
video signal (IN3-
V) sent to input
terminal pin (3) of
IC1203 (V-
SELECTOR)?
Check A/V-IN-
TERMINAL
(J1202) and
peripheral circuits.
Is component signal
(IN3-Y/Cb/Cr) sent to
input terminal pins
(33), (35) and (37) of
IC1203 (V-
SELECTOR)?
NO
Check A/V-IN-
TERMINAL
(J1201/1202) and
peripheral circuits.
Is Y/C signal (IN3-
Y/C) sent to input
terminal pins (5)
and (7) of IC1203
(V-SELECTOR)?
NO
Check S-
TERMINAL
(J1200) and
peripheral circuits.
YES
YES
YES
YES
YES
YES
NO
Is the composite
video signal
(CVBS) sent from
output terminal pin
(51) of IC1203 (V-
SELECTOR)?
Check IC1203 (V-
SELECTOR) and
peripheral circuits.
Are component signals
(Y, Cb and Cr) sent
from output terminal
pins (60), (59) and (58)
of IC1203 (V-
SELECTOR)?
NO
Check IC1203 (V-
SELECTOR) and
peripheral circuits.
Is Y/C signal (Y/C-
SIG) sent from output
terminal pins (52)
and (50) of IC1203
(V-SELECTOR)?
NO
Check IC1203 (V-
SELECTOR) and
peripheral circuits.
YES
YES
YES
YES
NO
Is the composite
video signal
(CVBS1) sent to
input terminal pin
(242) of IC3300 (V-
PROCESSOR)?
Check IC3300 (V-
PROCESSOR),
Q3706/Q3707 and
peripheral circuits.
Are component
signals (Y, Cb and
Cr) sent to input
terminal pins (246),
(232) and (225) of
IC3300 (V-
PROCESSOR)?
NO
Check IC3300 (V-
PROCESSOR),
Q3700 Ð Q3705
and peripheral
circuits.
Is Y/C signal
(CVBS2/C-SIG1)
sent to input
terminal pins (244)
and (231) of
IC3300 (V-
PROCESSOR)?
NO
NO
Check IC3300 (V-
PROCESSOR),
Q3708/Q3709 and
peripheral circuits.
YES
YES
Is LVDS signal (TA± - TD±) sent from pins (36) and (37) - (26) and (27) of IC3300 (V-PROCESSOR), and is CLK signal
(RCLK1±) sent from pin (28)/(29)?
Check IC3300, pins
(28) and (29) for
RCLK signal, and
peripheral circuits.
YES
NO
Is digital RGB signal sent to pins (14) and (21) - (42) and (49) of LCD-CONNECTOR SC4651/4652?
Check IC4502,
LCD-
CONNECTOR,
SC4651/4652 and
peripheral circuits.
YES
NO
NO
Is the digital signal (RMS/GMS/BMS) sent from pins (27) and (34) - (47) and (50) of IC4601 (LVDS-RECEIVER), and is SYNC
signal (HS/VS) sent from pin (3)/(5)?
Check IC4601, pins
(3) and (5) for
HS/VS signal, and
peripheral circuits.
YES
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)?
YES
Check the LCD panel.
Check IC4502 and
peripheral circuits.
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