Sharp LC-26SA1E/RU Service Manual page 53

<When EXT3 is used for external input>
No EXT3-Y/C 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 Y/C signal sent to pins (11) and (7) of S-TERMINAL (J1201)?
Is Y3 signal (IN3-Y) sent to Input terminal pin (6) of IC1201
(SW)?
Is Y/C signal (VIN7/VIN8) sent to input terminal pins (184) and
(183) of IC3002 (VCT)?
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?
Replace LCD-CONT-UNIT.
No picture on the display (5)
on the remote control set up correctly? ••• See the operation manual and set "INPUT SOURCE" to "EXT3".
YES
YES
YES
YES
YES
YES
NO Check external connection, input setting, S-TERMINAL (J1201)
and peripheral circuits.
NO Check S-TERMINAL (J1201) and peripheral circuits.
NO Check CONNECTOR (SC2703/P1102), IC3002 (VCT) and
peripheral circuits.
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 pin (31) - (28) of CONNECTOR (P2305)?
Check HARNESS WIRE (LV).
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LC-26SA1E/RU, LC-32SA1E/RU