Read Sharp LC-42XD1E (serv.man5) Service Manual online
LC-42XD1E/RU
4 – 15
<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)?
signal (APC_R/G/B) sent
to pins (1), (2) and (3) of
EXT4-TERMINAL
(SC2303)?
NO
Check D-SUB-adaptor
and external connection.
and external connection.
YES
Is D-SUB-COMPONENT
signal (APC-R/G/B) sent
to pins (AA17), (AB17)
and (Y17) of IC3002 (V-
PRO.)?
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.
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.
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).
(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).
(CN2,P707) and HAR-
NESS WIRE (PL).
YES
Replace LCD-CONT-UNIT.
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