Read Sharp LC-52XL1E (serv.man3) Service Manual online
LC-46XL1E/RU, LC-52XL1E/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)?
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.)?
(AB17) and (Y17) of IC3002 (V-PRO.)?
NO
Check EXT4-TERMINAL and peripheral circuits.
YES
Is LVDS video signal (TA1
±~TE1±) 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
Is LVDS video signal (TA2
±~TE2±) 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.
pins (G10)/(N17) of BU2.5V line, pins (U16)/(G12) of BU1.8V
line and peripheral circuits.
YES
Check the FRC- circuit.
Refer to sheet of FRC (100Hz). (P4-20)
Refer to sheet of FRC (100Hz). (P4-20)
YES
Is LVDS video signal (TA1
±~TE1±) sent to pins (3)/(2) - (18)/(17)
of CONNECTOR CN1 of LCD-CONT-UNIT, and is CLK signal
(CK1
(CK1
±) sent to pins (12)/(11)?
Is LVDS video signal (TA2
±~TE2±) sent to pins (21)/(20) - (36)/
(35) of CONNECTOR CN1 of LCD-CONT-UNIT, and is CLK sig-
nal (CK2
nal (CK2
±) sent to pins (30)/(29)?
NO
Check CONNECTOR (SC6211, CN1) and HARNESS WIRE.
YES
Is power (+12V) supplied to pins (1) - (5) of CONNECTOR CN3 in
LCD-CONT-UNIT?
LCD-CONT-UNIT?
NO
Check CONNECTOR (CN3, PL) and HARNESS WIRE (PL).
YES
Replace LCD-CONT-UNIT.
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