Sharp AQUOS LC-26P50E, Service Manual

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LC-26P50E
LC-32P50E
LC-37P50E
43
TROUBLE SHOOTING TABLE
(Continued)
EXT4 (HDMI) 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 "EXT4".
2) Have you checked the type of video signal sent from HDMI-connected external device?áááConfirm the type (it should be "RGB", "YCbCr 4:4:4" or
"YCbCr 4:2:2").
3) Is ANT-cable disconnected, or incorrectly connected?áááConnect it correctly as per the operation manual.
NO
YES
Check IC1904 (HDMI-
RECEIVER) and peripheral
circuits.
Is digital signal sent to pins (59)
and (58) Ð (71) and (70) of
IC1904 (HDMI-RECEIVER)?
YES
NO
NO
YES
Check the connection
between HDMI-
CONNECTOR (SC1900) and
pins (59) and (58) Ð (71) and
(70) of IC1904 and peripheral
circuits.
Is digital signal sent to pins (16)
and (15) Ð (3) and (1) of HDMI-
CONNECTOR SC1900?
Check the soldering of pins
(16) and (15) Ð (3) and (1) of
HDMI-CONNECTOR
SC1900, and check that
HOTP-CONT signal is sent
from microcomputer
(IC2001).
NO
Is the type of video signal
(Signal Type) from HDMI-
connected external device
set?
From MENU-Option-HDMI
Setup-Signal Type, select a
signal type ("RGB", "YCbCr
4:4:4" or "YCbCr 4:2:2").
NO
Is "EXT4" selected with
button on the remote control?
Select "EXT4" with
button on the remote control.
YES
YES
YES
Are Y, Pr and Pb signals sent
to pins (39), (41) and (43) of
IC1203 (V-SELECTOR)?
NO
NO
YES
Are Y, Cb and Cr signals sent
from pins (60), (59) and (58)
of IC1203 (V-SELECTOR)?
Check IC1203 and
peripheral circuits.
NO
YES
YES
Are Y, Cb and Cr signals sent
to pins (246), (232) and (225)
of IC3300 (V-PROCESSOR)?
Check output of IC1203,
Q3700 Ð Q3705 and
peripheral circuits.
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.
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
NO
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)?
Check IC4502 and peripheral
circuits.
YES
NO
Is digital RGB signal sent to pins (14) and (21) - (42) and (49) of LCD-CONNECTOR SC4651/4652?
YES
Check the LCD panel.
Check IC4502, LCD-
CONNECTOR,
SC4651/4652 and peripheral
circuits.