Sharp LC-19D1E/S-BK/WH Service Manual page 61

<When EXT1 is used for external input>
No EXT1-Composite output of the external input system.
Checklist:
1) Is "INPUT SOURCE" button
control.
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 according to the operation manual of external device.
Is composite video signal sent to pin (20) of SCART1(SC501)?
Is composite video signal (SCART-CVBS) sent to pin (W1) of
IC801(DVP-M2) ?
Is LVDS video signal (RA ± - RD±) output from pins (P22)(P23) -
(V22)(V23) of IC801 (DVP-M2), and is RCLK signal (RCLK±)
output from pins (U22)(U23)?
Is RSDS-R/G/B signal (R[0:2]±, G[0:2]±, B[0:2]±) output from
pins (53) - (72) of IC9201 (RSDS-TRANSMITTER), and is CLK
signal (CK±) output to pins (60) and (59)?
Is RSDS-R/G/B signal (R[0:2]±, G[0:2]±, B[0:2]±) and CLK signal
(CK±) input to connector (SC9201) of LCD-PANEL?
(RSDS-R signal:22-27pin, RSDS-G signal:57-62pin, RSDS-B
signal:66-71pin, CK± signal:33/32pin)
Is liquid crystal drive power supply input to CONNECTOR
SC9201 of LCD-PANEL?
(VLS_B14.6V=40/41/42pin, VGH_B32V=5/6pin,VGL_-6V=2/
3pin, COM-BIAS=75/76/77pin)
Replace LCD-PANEL.
No picture on the display (4)-1
on the remote control set up correctly? • • • Set it as "EXT1" with the INPUT SOURCE button on the remote
YES
YES
YES
YES
YES
YES
NO Check external connection, input setting, SCART1(SC501) and
peripheral circuits.
NO Check IC508(SW), connector SC1203 (14) pin, connector P502
(14)pin and peripheral circuits.
NO Check pins (R19)(D5) of B3.3V line of IC801 (DVP-M2), pins
(D12) of B1.5V line, pins (B6)(A6) of SDA1/SCL1 line and
peripheral circuits.
NO Check pins (1) and (9) of B3.3V line of IC9201 (RSDS-TRANS-
MITTER), short circuits and peripheral circuits.
NO Check whether there is short-circuit at CONNECTOR SC9201 of
LCD-PANEL and also check peripheral circuits.
NO Please check REGULATOR-circuit of a defective voltage respec-
tively.
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LC-19D1E/S-BK/WH