Sharp LC-42XD10E (serv.man4) Service Manual ▷ View online
LC-42XD10E/RU
4 – 9
<0n input of the tuner (U/V)> No picture on the display (1)
No picture appears on
LCD during the tuner
(U/V) reception.
LCD during the tuner
(U/V) reception.
Checklist:
1) Is "INPUT SOURCE" button
on the remote control set up correctly ? ... See the operation manual and set "INPUT SOURCE" to "TV".
2) Is MENU-Picture-Contrast/Brightness set to "MIN" ? ... Set it to an appropriate level.
3) Is ANT-CABLE disconnected or connected improperly? ...Connect it correctly as per the operation manual.
3) Is ANT-CABLE disconnected or connected improperly? ...Connect it correctly as per the operation manual.
YES
Is level of pins (9) and
(8) of tuner (TU201) and
pins (12) and (2) of
IC204 (MULTI) at H?
(8) of tuner (TU201) and
pins (12) and (2) of
IC204 (MULTI) at H?
NO
These are communica-
tions lines for control
(I2C). Follow the path and
check whether they are
forced to
L(PULL_DOWN).
tions lines for control
(I2C). Follow the path and
check whether they are
forced to
L(PULL_DOWN).
YES
Is the video signal (IF)
sent from pin (11) of
tuner (TU201 )?
sent from pin (11) of
tuner (TU201 )?
NO
Check the tuner (TU201)
and peripheral circuits.
and peripheral circuits.
YES
Is the video signal
CVBS sent to pin
(AC23) of lC3002 (V-
PRO.)?
CVBS sent to pin
(AC23) of lC3002 (V-
PRO.)?
NO
Check CONNECTOR
(P201 /SC2705) and
peripheral circuits.
(P201 /SC2705) and
peripheral circuits.
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
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.
pins (G10)/(N17) of BU2.5V line,pins (U16)/(G12) of BU1.8V
line and peripheral circuits.
YES
Is LVDS video signal (TA
± - TD1±) sent to pins (3)/(2) -(12)/(11) of
CONNECTOR CN1 of LCD-CONT-UNIT, and is CLK signal (CK1
±)
sent to pins (10)/(9)?
Is LVDS video signal (TA2
Is LVDS video signal (TA2
± - TD2±) sent to pins (17)/(16) -(26)/(25)
of CONNECTOR CN1 of LCD-CONT-UNIT, and is CLK signal
(CK2
(CK2
±) sent to pins (24)/(23)?
NO
Check CONNECTOR (SC2302, CN1) and HARNESS WIRE
(LV).
(LV).
YES
Is power (+12V) supplied to pins (1) - (5) of CONNECTOR CN2 in
LCD-CONT-UNIT?
LCD-CONT-UNIT?
NO
Check CONNECTOR (CN2,P707) and HARNESS WIRE (PL).
YES
Replace LCD-CONT-UNIT.
LC-42XD10E/RU
4 – 10
<Durlng external connectlon> No picture on the monitor (2) -1
SCART1:
No picture appears on EXT1 -connected monitor during the tuner (U/V)
reception.
No picture appears on EXT1 -connected monitor during the tuner (U/V)
reception.
SCART2:
No picture from EXT1 appears on EXT2-connected montor.
Note: Normally, if the screen during display is sent to EXT2, no pic-
ture is sent to EXT2.
No picture from EXT1 appears on EXT2-connected montor.
Note: Normally, if the screen during display is sent to EXT2, no pic-
ture is sent to EXT2.
Checklist:
1) Are input terminal on back of TV and "INPUT SOURCE"button
on the remote control set up correctly ? ... See the operation manual and
set "INPUT SOURCE "appropriately.
2) Is the Signal Type (item) in MENU-Connection-Input-Select set to the same as that of the external device ? ... Set it to "CVBS", "Y/C" or
"RGB".
3) Is ANT-CABLE disconnected or connected improperly? ... Connect it correctly as per the operation manual.
4) The picture is sent to the monitor in a CVBS signal if the source during display is TV , CVBS or Y/C of EXT1-3. When sent by component, etc.,
that signal is not sent to the monitor.
5) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
6) The video output from EXT1 is not the monitor output (output of the picture now watching). The picture of the last selected TV channel is
always sent to EXT1. (Specification).
2) Is the Signal Type (item) in MENU-Connection-Input-Select set to the same as that of the external device ? ... Set it to "CVBS", "Y/C" or
"RGB".
3) Is ANT-CABLE disconnected or connected improperly? ... Connect it correctly as per the operation manual.
4) The picture is sent to the monitor in a CVBS signal if the source during display is TV , CVBS or Y/C of EXT1-3. When sent by component, etc.,
that signal is not sent to the monitor.
5) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
6) The video output from EXT1 is not the monitor output (output of the picture now watching). The picture of the last selected TV channel is
always sent to EXT1. (Specification).
Is video signal sent to
pin (19) of SCART1
(J1101)?
pin (19) of SCART1
(J1101)?
YES
Check SCART1 , external
connection or input setting.
connection or input setting.
Is video signal sent to
pin (40) of SCART2
(J1101)?
pin (40) of SCART2
(J1101)?
YES
Check SCART2, external
connection or input set-
ting.
connection or input set-
ting.
NO
NO
Is video signal (V-
OUT1) sent from pin (2)
of IC1102 (SW)?
OUT1) sent from pin (2)
of IC1102 (SW)?
YES
Check SCART1 (J1101) and
peripheral circuits.
peripheral circuits.
Is video signal (V-
OUT2) sent from pin
(2) of IC1101 (SW)?
OUT2) sent from pin
(2) of IC1101 (SW)?
YES
Check SCART2 (J1101)
and peripheral circuits.
and peripheral circuits.
NO
NO
Is video signal (V-
OUT1) sent from pin
(Y23) of IC3002 (V-
PRO.)?
OUT1) sent from pin
(Y23) of IC3002 (V-
PRO.)?
YES
Check IC1102(SW),Connector
(P1101,SC2702) and
peripheral circuits.
(P1101,SC2702) and
peripheral circuits.
Is video signal (V-
OUT2) sent from pin
(Y20) of IC3002 (V-
PRO.)?
OUT2) sent from pin
(Y20) of IC3002 (V-
PRO.)?
YES
Check IC1101(SW), Con-
nector (P1102,SC2703)
and peripheral circuits.
nector (P1102,SC2703)
and peripheral circuits.
NO
NO
Is video signal (CVBS)
sent to pin (AC23) of
lC3002 (V-PRO.)?
sent to pin (AC23) of
lC3002 (V-PRO.)?
YES
Check power supply of IC3002
(V-PRO.) and peripheral cir-
cuits.
(V-PRO.) and peripheral cir-
cuits.
Is video signal (VIN1)
from EXT1 sent to pin
(AB22) of IC3002 (V-
PRO.)?
from EXT1 sent to pin
(AB22) of IC3002 (V-
PRO.)?
YES
Check power supply of
IC3002 (V-PRO.) and
peripheral circuits.
IC3002 (V-PRO.) and
peripheral circuits.
NO
NO
Is video signal (IF) sent
from pin (11) of tuner
(TU201 )?
from pin (11) of tuner
(TU201 )?
YES
Check CONNEC-
TOR(P201,SC2705) and
peripheral circuits.
TOR(P201,SC2705) and
peripheral circuits.
Check whether video
signal is sent to pin
(20) of SCART1.
signal is sent to pin
(20) of SCART1.
YES
Check SCART1 , CON-
NECTOR (SC2702,
P1101) and peripheral cir-
cuits.
NECTOR (SC2702,
P1101) and peripheral cir-
cuits.
NO
NO
Check 5/33 V power supply pins (10) and (7), I2C line pins (9) and (8) of
tuner (TU201) and peripheral circuits.
tuner (TU201) and peripheral circuits.
Check SCART1 ,
external connection or
input setting.
external connection or
input setting.
LC-42XD10E/RU
4 – 11
<Durlng external connectlon>
No picture on the monitor (2) -2
SCART2:
No picture from EXT3 appears on EXT2- connected monitor.
No picture from EXT3 appears on EXT2- connected monitor.
Checklist:
1) Are input terminal on back of TV and "INPUT SOURCE"button
on the remote control set up correctly ? ... See the operation manual and
set "INPUT SOURCE "appropriately.
2) Is the Signal Type (item) in MENU-Connection-Input-Select set to the same as that of the external device ? ... Set it to "CVBS", "Y/C" or
"RGB".
3) Is ANT-CABLE disconnected or connected improperly? ... Connect it correctly as per the operation manual.
4) The picture is sent to the monitor in a CVBS signal if the source during display is TV , CVBS or Y/C of EXT1-3. When sent by component, etc.,
that signal is not sent to the monitor.
5) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
6) The video output from EXT1 is not the monitor output (output of the picture now watching). The picture of the last selected TV channel is
always sent to EXT1. (Specification).
2) Is the Signal Type (item) in MENU-Connection-Input-Select set to the same as that of the external device ? ... Set it to "CVBS", "Y/C" or
"RGB".
3) Is ANT-CABLE disconnected or connected improperly? ... Connect it correctly as per the operation manual.
4) The picture is sent to the monitor in a CVBS signal if the source during display is TV , CVBS or Y/C of EXT1-3. When sent by component, etc.,
that signal is not sent to the monitor.
5) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
6) The video output from EXT1 is not the monitor output (output of the picture now watching). The picture of the last selected TV channel is
always sent to EXT1. (Specification).
Is video signal sent to pin (40) of
SCART2 (J1101)?
SCART2 (J1101)?
YES
Check SCART2, external con-
nection or input setting.
nection or input setting.
NO
Is video signal (V- OUT2) sent
from pin (2) of IC1101 (SW)?
from pin (2) of IC1101 (SW)?
YES
Check SCART2 (J1101) and
peripheral circuits.
peripheral circuits.
NO
Is video signal (V- OUT2) sent
from pin (Y20) of IC3002
(V-PRO.) ?
from pin (Y20) of IC3002
(V-PRO.) ?
YES
Check IC1101(SW), Connector
(P1102,SC2703) and peripheral
circuits.
(P1102,SC2703) and peripheral
circuits.
NO
Is video signal (IN3Y) from EXT3
sent to pin (AB20) of IC3002 (V-
PRO.)?
sent to pin (AB20) of IC3002 (V-
PRO.)?
YES
Check power supply of IC3002
(V-PRO.) and peripheral circuits.
(V-PRO.) and peripheral circuits.
NO
Is video signal (IN3YV) sent to pin
(2) of IC1201 (SW)?
(2) of IC1201 (SW)?
YES
Check pin (AB20) of IC3002 (V-
PRO.), CONNECTOR (SC2703,
P1102) and peripheral circuits.
PRO.), CONNECTOR (SC2703,
P1102) and peripheral circuits.
NO
Is video signal (CVBS) sent from
pin(1) of A/V-TERMINAL
(J1201=EXT3)?
pin(1) of A/V-TERMINAL
(J1201=EXT3)?
YES
Check pin (1) (IN3SW) of
IC1201(SW), power supply and
peripheral circuits.
IC1201(SW), power supply and
peripheral circuits.
NO
Check A/V-TERMINAL (J1201 ),
external connection or input set-
ting.
external connection or input set-
ting.
LC-42XD10E/RU
4 – 12
<When EXT1 is used for external input> No picture on the display (3)-1
No EXT1 -Composite output of the external input system.
No EXT1-RGB output of the external input system.
Checklist:
1) Is "INPUT SOURCE" button
on the remote control set up correctly? ...See the operation manual and set "INPUT SOURCE" to "EXIT".
2) Is MENU-Picture-Backlight/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.
3) Check the connection to the external device ...Connect it correctly as per the operation manual for the device.
Is composite video signal
sent to pin (20) of
SCART1 (J1101)?
sent to pin (20) of
SCART1 (J1101)?
NO
Check external connec-
tion, input setting,
SCART1 and peripheral
circuits.
tion, input setting,
SCART1 and peripheral
circuits.
IIs RGB signal sent to
pins (15),(11) and (7) of
SCART1 (J1101) ?
pins (15),(11) and (7) of
SCART1 (J1101) ?
NO
Check external connec-
tion, input setting, SCART1
(J1101) and peripheral cir-
cuits.
tion, input setting, SCART1
(J1101) and peripheral cir-
cuits.
YES
YES
Is composite video signal
(VIN1(V)) sent to input
terminal pin (AB22) of
IC3002 (V-PRO.) ?
(VIN1(V)) sent to input
terminal pin (AB22) of
IC3002 (V-PRO.) ?
NO
Check CONNECTOR
(SC2702/
P1101),SCART1(J1101)
and peripheral circuits.
(SC2702/
P1101),SCART1(J1101)
and peripheral circuits.
Is RGB signal (RED1/
GREEN1/BLUE1) sent to
input terminal pins
(Y19)(AB19) and (AC18)
of IC3002 (V-PRO.) ?
GREEN1/BLUE1) sent to
input terminal pins
(Y19)(AB19) and (AC18)
of IC3002 (V-PRO.) ?
NO
Check CONNECTOR
(SC2702/P1101),SCART1
(J1101) and peripheral cir-
cuits.
(SC2702/P1101),SCART1
(J1101) and peripheral cir-
cuits.
YES
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
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 (CK1
±) sent to pins (10)/(9)?
Is LVDS video signal (TA2
± - 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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