Read Sharp LC-32GD9EK (serv.man10) Service Manual online
50
LC-26GA5E
LC-32GA5E
LC-32GD9E
LC-37GD9E
Troubleshooting Table (continued)
34
LC-32/37GD8E/RU
LC-32/37BT8E/RU
TROUBLESHOOTING TABLE
(Continued)
<When EXT1 is used for external input>
No EXT1-Composite output of the external
input system.
input system.
Checklist:
1) Is "INPUT SOURCE" button on the remote control set up correctly? ··· See the operation manual and set "INPUT SOURCE" to "EXT1".
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.
1) Is "INPUT SOURCE" button on the remote control set up correctly? ··· See the operation manual and set "INPUT SOURCE" to "EXT1".
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.
No EXT1-RGB output of the external input
system.
system.
No EXT1-Y/C output of the external input
system.
system.
NO
Is composite video
signal sent to pin
(20) of SCART1
(J1101)?
signal sent to pin
(20) of SCART1
(J1101)?
Check external
connection, input
setting, SCART1
(J1101) and
peripheral circuits.
connection, input
setting, SCART1
(J1101) and
peripheral circuits.
Is RGB signal sent
to pins (15), (11)
and (7) of SCART1
(J1101)?
to pins (15), (11)
and (7) of SCART1
(J1101)?
NO
Check external
connection, input
setting, SCART1
(J1101) and
peripheral circuits.
connection, input
setting, SCART1
(J1101) and
peripheral circuits.
Is Y/C signal sent
to pins (20) and
(15) of SCART1
(J1101)?
to pins (20) and
(15) of SCART1
(J1101)?
NO
Check external
connection, input
setting, SCART1
(J1101) and
peripheral circuits.
connection, input
setting, SCART1
(J1101) and
peripheral circuits.
YES
YES
YES
NO
Is composite video
signal (VIN_1)
sent to input
terminal pin (6) of
IC2702 (SW)?
signal (VIN_1)
sent to input
terminal pin (6) of
IC2702 (SW)?
Check
CONNECTOR
(SC2702/P1101),
SCART1 (J1101)
and peripheral
circuits.
CONNECTOR
(SC2702/P1101),
SCART1 (J1101)
and peripheral
circuits.
Is RGB signal
(R1/G1/B1=VIN_6/
5/9) sent to input
terminal pins
(187), (175) and
(182) of IC3002
(VCT)?
(R1/G1/B1=VIN_6/
5/9) sent to input
terminal pins
(187), (175) and
(182) of IC3002
(VCT)?
NO
Check
CONNECTOR
(SC2702/P1101),
SCART1 (J1101)
and peripheral
circuits.
CONNECTOR
(SC2702/P1101),
SCART1 (J1101)
and peripheral
circuits.
Is Y/C signal
(VIN1=Y1/C1) sent
to input terminal
pins (190) and
(187) of IC3002
(VCT)?
(VIN1=Y1/C1) sent
to input terminal
pins (190) and
(187) of IC3002
(VCT)?
NO
Check
CONNECTOR
(SC2702/P1101),
SCART1 (J1101)
and peripheral
circuits.
CONNECTOR
(SC2702/P1101),
SCART1 (J1101)
and peripheral
circuits.
YES
NO
Is composite video
signal
(CVBS1=VIN2)
sent to input
terminal pin (190)
of IC3002 (VCT)?
signal
(CVBS1=VIN2)
sent to input
terminal pin (190)
of IC3002 (VCT)?
Check IC2702
(SW) and
peripheral circuits.
(SW) and
peripheral circuits.
YES
NO
YES
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)?
(VCTP), and is CLK signal (LVDS_CN/CP) sent from pins (132) and (131)?
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.
power line and pins (185), (169) and (142) of
BU1.8V power line of IC3002 (VCTP), and
peripheral circuits.
YES
YES
Replace LCD-CONT-UNIT.
YES
NO
NO
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)?
CN1 in LCD-CONT-UNIT, and is CLK signal (LVDS_CN/CP) sent to pins (21) and (22)?
Check CONNECTOR (P2305, CN1) and
Harness Wire (LV).
Harness Wire (LV).
Is power (LCD5V) supplied to pins (2) – (5) of CONNECTOR CN1 in LCD-CONT-UNIT?
No picture on the display (3)
Check HARNESSWIRE (LV).
Is IC 1705 supplying LCD 5V?
NO
Check IC1705 and peripheral parts.
YES
NO
Change IC1705.
Is LCD5V supplied to pins (31) - (28) of
CONNECTOR (P2305)?
YES
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