Read Sharp LC-37RD2E (serv.man5) Service Manual online
LC-32RD2E/RU, LC-37RD2E/RU
4 – 9
No picture on the display (1)
No video output in all modes.
YES
Are there the RDI[0:9], GDI[0:9], BDI[0:9], VCT_ENI, VCT_VI,
VCT_HI and VCT_PCLKI signal outputs from IC3001?
VCT_HI and VCT_PCLKI signal outputs from IC3001?
NO
Check IC3001 and its peripheral circuits.
YES
Are there the RDI[0:9], GDI[0:9], BDI[0:9], VCT_ENI, VCT_VI,
VCT_HI and VCT_PCLKI signal inputs at IC3301 (FRC)?
VCT_HI and VCT_PCLKI signal inputs at IC3301 (FRC)?
NO
Check the line between IC3001 and IC3301.
YES
Are there the RDL[12-19, 22-29], GDL[12-19, 22-29], BDL[12-19,
22-29], HCL, VCL, DEL and CLKL signal outputs from IC3301?
22-29], HCL, VCL, DEL and CLKL signal outputs from IC3301?
NO
Check IC3301 and its peripheral circuits.
YES
Are there the RDL[12-19, 22-29], GDL[12-19, 22-29], BDL[12-19,
22-29], HCL, VCL, DEL and CLKL signal inputs at IC2361
(LVDS)?
22-29], HCL, VCL, DEL and CLKL signal inputs at IC2361
(LVDS)?
NO
Check the line between IC3301 and IC2361.
YES
Is there the LVDS signal output at the LVDS 1st channel and 2nd channel of IC2361?
TA1_P/M (49/48), TB1_P/M (47/46), TC1_P/M (44/42), TCLK1_P/M (42/41), TD1_P/M (49/48), TA2_P/M (37/36), TB2_P/M (35/34), TC2_P/M (32/
31), TCLK2_P/M (30/29), TD2_P/M (28/27)
TA1_P/M (49/48), TB1_P/M (47/46), TC1_P/M (44/42), TCLK1_P/M (42/41), TD1_P/M (49/48), TA2_P/M (37/36), TB2_P/M (35/34), TC2_P/M (32/
31), TCLK2_P/M (30/29), TD2_P/M (28/27)
YES
NO
Check the panel module.
Check IC2361 and its peripheral control circuits.
(IC3301, IC2301, etc.)
(IC3301, IC2301, etc.)
<On input of the tuner (U/V)> No picture on the display (2)
No picture appears on LCD during the tuner (U/V) reception.
Checklist:
1) Is “INPUT SOURCE” button
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.
Is level of pins (15) and (14) of tuner (TU201) and pins (10) and
(11) of IC201 (IF-DEMOD) at H?
NO
These are communications lines for control (I2C). Follow the
path and check whether they are forced to L (PULL_DOWN).
path and check whether they are forced to L (PULL_DOWN).
YES
Is the video signal (IF) sent from pin (17) of tuner (TU201)?
NO
Check the tuner (TU201) and peripheral circuits.
YES
Is video signal sent from pin (17) of IC201 (IF-DEMOD)?
NO
Check FL201 (SAW-FIL), IC201 and peripheral circuits.
YES
Is the video signal VIN1 (ATUNER-CVBS) sent to pin (191) of
lC3002 (VCT)?
lC3002 (VCT)?
NO
Check IC201 (IF-DEMOD), CONNECTOR (P201/SC2742) and
peripheral circuits. (Q204, etc.)
peripheral circuits. (Q204, etc.)
YES
Refer to “No video output in all modes”.
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