LC-42/46/52D85X
6 – 16
<During external connection> No picture on the monitor (1)
No picture appears on MONITOR OUT1 - connected monitor during the tuner (U/V) reception.
Checklist:
1) Is ANT-CABLE disconnected or connected improperly?
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⋅
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Connect it correctly as per the operation manual.
2) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of INPUT1-3.
When sent by component, etc., that signal is not sent to the monitor.
3) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
SUB UNIT:
Is CVBS signal output into pin (6) of J1701 (MONITOR OUT1)
from pin (51) of IC506?
YES
Check the setting of an external input device that connects of
J1701.
NO
Is TUNRECVBS signal output from pin (17) of IC7504 (IF-
DEMO)?
YES
Check the line between IC7504 and IC7506.
(Q7505, IC7508, etc.)
NO
Is IF signal output from pin (17) of TUNRE (TU7501)?
YES
Check the IC7504/FL7502 (VIF_SAW) and its peripheral circuits.
NO
Check whether I2C is normally accessed between TU7501 and
IC7507 (COFDM).
<During external connection> No picture on the monitor (2)
No picture appears on MONITOR OUT1 - connected monitor during the tuner (DTV) reception.
Checklist:
1) Is ANT-CABLE disconnected or connected improperly?
⋅
⋅
⋅
Connect it correctly as per the operation manual.
2) The picture is sent to the monitor in a CVBS signal if the source during display is TV, CVBS or Y/C of INPUT1-3.
When sent by component, etc., that signal is not sent to the monitor.
3) When the monitor picture is not sent and is not displayed on the monitor, refer to “No picture” for each terminal.
SUB UNIT:
Is CVBS signal outputted from pin (51) of IC506 to pin (6) of
J1701?
YES
Check the setting of an external input device that connects of
J1701.
MAIN UNIT:
NO
Is DTV_CVBS signal output from pin (18) of connector (SC1101)
to pin (15) of IC506?
YES
Check the line between SC1101 (MAIN_UNIT)/ SC501 (SUB
UNIT) and IC506.
NO
Is DTM_CVBS signal output to pin (AD4) of IC8101?
YES
Check the line between IC8101 and SC1101.
NO
Check the IC8101 and its peripheral circuits.
