Sharp LC-26AF3 M/H/X Service Manual page 44

LC-26AF3 M/H/X
LC-32AF3 M/H/X
LC-37AF3 M/H/X
TROUBLE SHOOTING TABLE
When EXT4 is used for external input>
XT4 (HDMI) in trouble.
Confirmation of the settings:
1) Is "INPUT SOURC " button
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.
Check IC1904 (HDMI-
R C IV R) and peripheral
circuits.
Check the connection
between HDMI-
CONN CTOR (SC1900) and
pins (59) and (58) Ð (71) and
(70) of IC1904 and peripheral
circuits.
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?
on the remote control set up correctly?áááSee the operation manual and set "INPUT SOURC " to " XT4".
Is digital signal sent to pins (59)
YES
and (58) Ð (71) and (70) of
IC1904 (HDMI-R C IV R)?
NO
Is digital signal sent to pins (16)
YES
and (15) Ð (3) and (1) of HDMI-
CONN CTOR SC1900?
NO
Check the soldering of pins
(16) and (15) Ð (3) and (1) of
HDMI-CONN CTOR
SC1900, and check that
HOTP-CONT signal is sent
from microcomputer
(IC2001).
YES
YES
YES
YES
Check the LCD panel.
(Continued)
No picture (6)
YES
Is " XT4" selected with
button on the remote control?
YES
Is the type of video signal
(Signal Type) from HDMI-
connected external device
set?
YES
Are Y, Pr and Pb signals sent
NO
to pins (39), (41) and (43) of
IC1203 (V-S L CTOR)?
YES
Are Y, Cb and Cr signals sent
from pins (60), (59) and (58)
of IC1203 (V-S L CTOR)?
YES
Are Y, Cb and Cr signals sent
to pins (246), (232) and (225)
of IC3300 (V-PROC SSOR)?
YES
44
Select " XT4" with
NO
button on the remote control.
From M NU-Option-HDMI
NO
Setup-Signal Type, select a
signal type ("RGB", "YCbCr
4:4:4" or "YCbCr 4:2:2").
Check IC1203 and
NO
peripheral circuits.
Check output of IC1203,
NO
Q3700 Ð Q3705 and
peripheral circuits.
Check IC3300, pins (28) and
NO
(29) for RCLK signal, and
peripheral circuits.
Check IC4601, pins (3) and
NO
(5) for HS/VS signal, and
peripheral circuits.
Check IC4502 and peripheral
NO
circuits.
Check IC4502, LCD-
NO
CONN CTOR,
SC4651/4652 and peripheral
circuits.