Sharp LC-32GA8 Service Manual page 37

LC-32/37GA8E/RU
LC-32/37BV8E/RU
Troubleshooting Table (continued)
TROUBLESHOOTING TABLE
<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 Check external
signal sent to pin NO connection, input
(20) of SCART1 setting, SCART1
(J1101)? (J1101) and
peripheral circuits.
YES
Is composite video Check
signal (VIN_1) NO CONNECTOR
sent to input (SC2702/P1101),
terminal pin (6) of SCART1 (J1101)
IC2702 (SW)? and peripheral
circuits.
YES
Is composite video
Check IC2702
signal
NO
(SW) and
(CVBS1=VIN2)
peripheral circuits.
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?
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".
Is RGB signal sent
to pins (15), (11)
and (7) of SCART1
(J1101)?
YES
Is RGB signal
(R1/G1/B1=VIN_6/
5/9) sent to input
terminal pins
(187), (175) and
(182) of IC3002
(VCT)?
YES
YES
YES
YES
Replace LCD-CONT-UNIT.
(Continued)
No EXT1-Y/C output of the external input
system.
Check external Is Y/C signal sent
NO connection, input to pins (20) and
setting, SCART1 (15) of SCART1
(J1101) and (J1101)?
peripheral circuits.
Check Is Y/C signal
NO CONNECTOR (VIN1=Y1/C1) sent
(SC2702/P1101), to input terminal
SCART1 (J1101) pins (190) and
and peripheral (187) of IC3002
circuits. (VCT)?
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
Harness Wire (LV).
NO
Is LCD5V supplied to pins (31) – (28) of
CONNECTOR (P2305)?
Check Harness Wire (LV).
32
37
LC-26GA5E
LC-32GA8/LC-32BV8
LC-32GA5E
LC-37GA8/LC-37BV8
Check external
NO connection, input
setting, SCART1
(J1101) and
peripheral circuits.
YES
Check
NO CONNECTOR
(SC2702/P1101),
SCART1 (J1101)
and peripheral
circuits.
YES