Sharp LC-46XD1E/RU, Service Manual

Page: 43 / 185

LC-46/52XD1E-RU
6 – 16
<When EXT4 is used for external input> No picture on the display (6)
No EXT4 (15pin-D-SUB terminal) output of the external input sys-
tem.
Checklist:
1) Is "INPUT SOURCE" button on the remote control set up correctly ? ... See the operation manual and set "INPUT SOURCE" to "EXT4".
2) Connect the included D-SUB-Adapter-Cable to the COMPONENT terminal of an external device. ...See the operation manual (use a commer-
cially available Component-Cable to connect to the external device).
3) Is ANT-CABLE disconnected or connected improperly ? ... Connect it correctly as per the operation manual
Is "EXT4" selected
with button on the
remote control
NO Select "EXT4" with
button on the
remote control.
YES
Is D-SUB-COMPONENT
signal (APC_R/G/B) sent
to pins (1),(2) and (3) of
EXT4-TERMINAL
(SC2303) ? NO Check D-SUB-adaptor
and external connection.
YES
Is D-SUB-COMPONENT
signal (APC-R/G/B) sent
to pins (AA17),(AB17)
and (Y17) of IC3002 (V-
PRO.) ? NO Check EXT4-TERMI-
NAL and peripheral cir-
cuits.
YES
Is LVDS video signal (TA1
±
- TD1
±
) sent to pins (AB8)/(AC8) - (AB3)/(AC3) of IC3002 (V-PRO.), and
is CLK signal (CK1
±
) sent to pins (AB5)/(AC5)?
Is LVDS video signal (TA2
±
- TD2
±
) sent to pins (AC2)/(AC1) - (V2)/(V1) of IC3002 (V-PRO.), and is
CLK signal (CK2
±
) sent to pins (Y2)/(Y1)?
NO Check pins (G14)/(U10) of
BU3.3V line of IC3002 (V-
PRO.), pins (G10)/(N17) of
BU2.5V line,pins (U16)/
(G12) of BU1.8V line and
peripheral circuits.
YES
Is LVDS video signal (TA1
±
- TD1
±
) sent to pins (3)/(2) -(12)/(11) of CONNECTOR CN1 of LCD-
CONT-UNIT, and is CLK signal
±
- TD2
±
) sent to pins (17)/(16) -(26)/(25) of CONNECTOR CN1 of
LCD-CONT-UNIT, and is CLK signal (CK2
±
) sent to pins (24)/(23)?
NO Check CONNECTOR
(SC2302, CN1) and HAR-
NESS WIRE (LV)..
YES
Is power (+12V) supplied to pins (1) - (5) of CONNECTOR CN2 in LCD-CONT-UNIT? NO Check CONNECTOR
(CN2,P707) and HAR-
NESS WIRE (PL).
YES
Replace LCD-CONT-UNIT.