Sharp LC-32GD8EE Service Manual page 50

LC-26GA5E
LC-32/37GD8E/RU
LC-32/37GD8E/RU
LC-32GA5E
LC-32/37BT8E/RU
LC-32/37BT8E/RU
Troubleshooting Table (continued)
<When EXT1 is used for external input>
No EXT1-Composite output of the external
input system.
Checklist:
1) Is "INPUT SOURCE" button
2) Is MENU-PICTURE-CONTRAST/BRIGHTNESS set to "MIN"? ··· Set it to an appropriate level.
3) Check the connection to the external device ··· Connect it correctly as per the operation manual for the device.
Is composite video
signal sent to pin
NO
(20) of SCART1
(J1101)?
YES
Is composite video
signal (VIN_1)
NO
sent to input
terminal pin (6) of
IC2702 (SW)?
YES
Is composite video
signal NO
(CVBS1=VIN2)
sent to input
terminal pin (190)
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)?
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)?
Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?
Check IC1705 and peripheral parts.
TROUBLESHOOTING TABLE
No picture on the display (3)
No EXT1-RGB output of the external input
system.
on the remote control set up correctly? ··· See the operation manual and set "INPUT SOURCE" to "EXT1".
Check external Is RGB signal sent
connection, input to pins (15), (11)
setting, SCART1 and (7) of SCART1
(J1101) and (J1101)?
peripheral circuits.
Check Is RGB signal
CONNECTOR (R1/G1/B1=VIN_6/
(SC2702/P1101), 5/9) sent to input
SCART1 (J1101) terminal pins
and peripheral (187), (175) and
circuits. (182) of IC3002
(VCT)?
Check IC2702
(SW) and
peripheral circuits.
YES
YES
YES
Replace LCD-CONT-UNIT.
Check external
connection, input
NO
setting, SCART1
(J1101) and
peripheral circuits.
YES
Check
CONNECTOR
NO
(SC2702/P1101),
SCART1 (J1101)
and peripheral
circuits.
YES
NO
NO
NO
YES
Is IC 1705 supplying LCD 5V?
Change IC1705.
34
50
(Continued)
No EXT1-Y/C output of the external input
system.
Is Y/C signal sent Check external
to pins (20) and connection, input
NO
(15) of SCART1 setting, SCART1
(J1101)? (J1101) and
peripheral circuits.
YES
Is Y/C signal Check
(VIN1=Y1/C1) sent CONNECTOR
NO
to input terminal (SC2702/P1101),
pins (190) and SCART1 (J1101)
(187) of IC3002 and peripheral
(VCT)? circuits.
YES
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.
Check CONNECTOR (P2305, CN1) and
Harness Wire (LV).
Is LCD5V supplied to pins (31) - (28) of
CONNECTOR (P2305)?
NO
Check HARNESSWIRE (LV).
NO
YES