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No video output in all modes.
Is LVDS video signal (LVDS_0N/0P-3N/3P) sent to pins (141)/
(140)-(129)/(128) of IC3002 (VCT), and is CLK signal (LVDS_CN/
CP) sent to pins (132)/(131)?
Is LVDS video signal (LVDS_0N/0P-3N/3P) sent to pins (20)/(19)-
(8)/(7) of connector (P2305), and is CLK signal (LVDS_CN/CP)
sent to pins (11)/(10)?
Is power (LCD5V) supplied to pins (28-31) of connector (P2305)?
Check the panel module.
<On input of the tuner (U/V)>
No picture appears on LCD during the tuner (U/V) reception.
Checklist:
1) Is "INPUT SOURCE" button
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.
Is level of pins (15) and (14) of tuner (TU201) and pins (10) and
(11) of IC201 (IF-DEMOD) at H?
Is the video signal (IF) sent from pin (17) of tuner (TU201)?
Is video signal sent from pin (17) of IC201 (IF-DEMOD)?
Is the video signal VIN1 (ATUNER-CVBS) sent to pin (191) of
lC3002 (VCT)?
Refer to "No video output in all modes".
No picture on the display (1)
YES
YES
YES
YES
No picture on the display (2)
on the remote control set up correctly? ••• See the operation manual and set "INPUT SOURCE" to "TV".
YES
YES
YES
YES
NO
Check IC3002 and its peripheral circuits.
NO
Check the line between IC3002 and P2305.
NO
Check LCD5V_LINE and its peripheral circuits.
(Q1706, Q1704, etc.)
NO
These are communications lines for control (I2C). Follow the
path and check whether they are forced to L (PULL_DOWN).
NO
Check the tuner (TU201) and peripheral circuits.
NO
Check FL201 (SAW-FIL), IC201 and peripheral circuits.
NO
Check IC201 (IF-DEMOD), CONNECTOR (P201/SC2705) and
peripheral circuits. (Q204, etc.)
4 – 9
LC-37AD5E
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