Sharp LC-32GD8EE Service Manual page 54

LC-26GA5E
LC-32/37GD8E/RU
LC-32GA5E
LC-32/37BT8E/RU LC-32/37GD8E/RU
LC-32/37BT8E/RU
Troubleshooting Table (continued)
<When EXT5 is used for external input>
No EXT5 (HDMI) output of the
external input system.
Checklist:
1) Is "INPUT SOURCE" button
2) Have you checked the type of video signal sent from HDMI-connected external device? ··· Confirm the type (it should be "RGB", "YCbCr 4:4:4" or
"YCbCr 4:2:2").
3) Have you checked the type of Colour Matrix sent from HDMI-connected external device? ··· Confirm the type (it should be "ITU601' or "ITU709".)
4) Is ANT-CABLE disconnected or connected improperly? ··· Connect it correctly as per the operation manual.
YES
Is "EXT5" selected with
button on the remote control?
YES
Is the type of video signal
(Signal Type) from HDMI-
connected external device set?
YES
Is the type of colour signal
(Colour Matrix) from HDMI-
connected external device set?
YES
Is TMDS data (RX`± signal)
sent to pins (1) – (12) of EXT5
(HDMI) terminal (SC1901)?
YES
Is 8bit-DIGITAL signal (HDMI-
R/G/B) sent from pins (110) –
(144) of IC1905 (HDMI-
RECEIVER)?
YES
Is 8bit-DIGITAL signal (HDMI-
R/G/B) sent to pins (73) – (50) of
IC3002 (VCT)?
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent from pins (141) and (140) - (129) and (128) of IC3002 (VCTP), and is
CLK signal (LVDS_CN/CP) sent from pins (132) and (131)?
YES
Is LVDS signal (LVDS_0N/0P-3N/3P) sent to pins (12) and (13) - (24) and (25) of CONNECTOR CN1 in LCD-
CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?
YES
Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?
YES
Check IC1705 and peripheral parts.
TROUBLESHOOTING TABLE
No picture on the display (7)
on the remote control set up correctly? ··· See the operation manual and set "INPUT SOURCE" to "EXT5".
NO
Select "EXT5" with
on the remote control.
NO
From MENU-Option-HDMI
Setup-Signal Type, select a
signal type ("RGB", "YCbCr
4:4:4" or "YCbCr 4:2:2").
NO
From Option-HDMI Setup-
Colour Matrix, select a color
signal type ("AUTO", "ITU601"
or "ITU709").
NO
Is I2C signal (SDA/SCL signal)
sent to pins (16) and (15) of
EXT5 (HDMI) terminal? Check
external connection and
peripheral circuits.
NO
Check power supply (3.3/1.8V)
pins (99) and (74) of IC1905,
SDA/SCL signal pins (29) and
(30), and peripheral circuits.
NO
Check SDA3/SCL3 signal pins
(27) and (28), interface between
IC1905 and IC3002, and
peripheral circuits.
Replace LCD-CONT-UNIT.
button
YES
Is IC 1705 supplying LCD 5V?
Change IC1705.
38
54
(Continued)
NO
Check pins (192), (170) and
(133) of BU3.3V power line and
pins (185), (169) and (142) of
BU1.8V power line of IC3002
(VCTP), and peripheral circuits.
NO
Check CONNECTOR (P2305,
CN1) and Hareness Wire (LV).
NO
Is LCD5V supplied to pins (31) -
(28) of CONNECTOR (P2305)?
NO
Check HARNESSWIRE (LV).
NO
YES