Sharp LC-70LE835E/RU, Руководство по обслуживанию

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LC-70LE835E/RU, 836E/S, 838E
6 – 16
<During external connection> No picture on the monitor
No picture appears on EXT1 connected monitor during the DTV reception.
Does CVBS signal output from pin [19] of EXT1 (SC505)?
YES Check the setting of an external input device that connects with
EXT1.
NO
Does CVBS signal output from pin [5] of IC510 (CAPLESS
VIDEO AMP with LPF)? YES Check the line between SC505 and IC510.
NO
Does CVBS signal input to pin [3] of IC510? YES Check the peripheral circuits of IC510.
NO
Does CVBS signal output from pin [2] of IC507? YES Check the line between IC507 and IC510.
NO
Is CVBS_OUT_MUTE [pin (1)] of IC507 at “H”? YES Check the line between IC3303 and IC507.
Check the peripheral circuits of IC3303.
NO
Does CVBS signal input to pin [4] of IC507? YES Check the peripheral circuits of IC507.
NO
Does CVBS signal output from pin (AJ20/CPU_VDAC1_OUT) of
IC3303 (Digital AV decode & Main CPU)? YES Check the line between IC3303 and IC507.
Check the peripheral circuits of IC3303.
NO
Refer to “No picture on the display (3) (4)”.
[External input Network] No picture on the display
Does not the signal input to Network go out?
Does the signal in/output to pins (1), (2), (3), (6) of LAN-jack
(J9501)?
NO Check the interface device and peripheral circuits.
(power-LED of hub, LINK-LED of hub)
YES
Do signals in/output to pins of IC3303 (Digital AV decode & Main
CPU)?
Pins [AD32&AD31/CPU_DATMDI_RJ45_TPN, AE32&AE31/
CPU_DATMDI_RJ45_RPN] NO Check the line between IC3303 and J9501.
(T9501 etc...)
YES
Check IC3303 and its peripheral circuits.