Sharp LC-37XD10, Service Manual

Page: 43 / 190

LC-37XD10E/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. 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.
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).
Is video signal sent to
pin (19) of SCART1
(J1101)? YES Check SCART1 , external
connection or input setting. Is video signal sent to
pin (40) of SCART2
(J1101)? YES Check SCART2, external
connection or input set-
ting.
NO NO
Is video signal (V-
OUT1) sent from pin (2)
of IC1102 (SW)? YES Check SCART1 (J1101) and
peripheral circuits. Is video signal (V-
OUT2) sent from pin
(2) of IC1101 (SW)? YES Check SCART2 (J1101)
and peripheral circuits.
NO NO
Is video signal (V-
OUT1) sent from pin
(Y23) of IC3002 (V-
PRO.)? YES Check IC1102(SW),Connector
(P1101,SC2702) and
peripheral circuits. Is video signal (V-
OUT2) sent from pin
(Y20) of IC3002 (V-
PRO.)? YES Check IC1101(SW), Con-
nector (P1102,SC2703)
and peripheral circuits.
NO NO
Is video signal (CVBS)
sent to pin (AC23) of
lC3002 (V-PRO.)? YES Check power supply of IC3002
(V-PRO.) and peripheral cir-
cuits. Is video signal (VIN1)
from EXT1 sent to pin
(AB22) of IC3002 (V-
PRO.)? YES Check power supply of
IC3002 (V-PRO.) and
peripheral circuits.
NO NO
Is video signal (IF) sent
from pin (11) of tuner
(TU201 )? YES Check CONNEC-
TOR(P201,SC2705) and
peripheral circuits. Check whether video
signal is sent to pin
(20) of SCART1.
YES Check SCART1 , CON-
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. Check SCART1 ,
external connection or
input setting.