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Is CVBS signal output into pin (2) of EXT1 (SC505)?
Is CVBS signal output to pin (2) of IC504?
Is TU_OUT_CVBS_MUTE [pin (1) of IC504] at "H"?
Is CVBS signal input to pin (6) of IC504?
Is CVBS signal output to pin (A27) of IC3302 (Digital AV decode
& Main CPU)?
In the case that No picture appears on EXT1 connected monitor during the ATV reception., refer to (A)
In the case that No picture appears on EXT1 connected monitor during the DTV reception., refer to (B)
Refer to "No picture on the display (2)"
Does the signal in/output to pins (1), (2), (3), (6) of LAN-jack
(J9501)?
Does the signal in/out to pins (12, 11/TX+-), (10, 9/RX+-) of
IC9501?
Does the signal in/output to pins [18, 19, 47, 29, 41, 27, 23, 22/
ONDA6~13], [21, 20, 35, 36, 38, 39, 34/ONDD8~14] [28, 33/
N_ONDCE0, N_ONDCE1] of LAN-jack (J9501)?
Does the signal in/output to pins [A8, B8, C9, C8, A7, F10, A4,
B4/ONDA6~13], [D13, F13, D11, E11, F12, E12, E13/
ONDD8~14], [C6, B3/N_ONDCE0, N_ONDCE1] of IC3302 (Digi-
tal AV decode & Main CPU)?
Check IC9501 and its peripheral circuits.
<During external connection> No picture on the monitor
No picture appears on EXT1 connected monitor during the ATV/DTV reception.
NO
NO
NO
NO
NO
(A)
[External input Network] No picture on the display
Does not the signal input to Network go out?
YES
YES
YES
YES
YES
Check the setting of an external input device that connects with
EXT1.
YES
Check the line between SC505 and IC504.
YES
Check the peripheral circuits of IC3302.
YES
Check the IC504 and their peripheral circuits.
YES
Check the line between IC504 and IC3302.
Refer to "No picture on the display (3)"
NO
Check the interface device and peripheral circuits.
(power-LED of hub, LINK-LED of hub)
NO
Check the line between J9501 and IC9501.
NO
Check IC9501 and its peripheral circuits.
NO
Check the line between X9501 and IC9501.
Check the crystal X9501. (SCA219WJ)
7 – 13
LC-46/60LE925E
(B)
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