Sharp AQUOS LC-60C6400U Wartungshandbuch PDF herunterladen (Seite 62)

LC-52/60/70LE640U,C6400U (1st Edition)

6 – 9

No video (3)

No video at UHF/VHF broadcast signal reception No video at digital broadcast signal reception

Is the specified TV signal selected on the input select menu screen?

Is there the analog video signal output (CVBS) at pin (9) of

tuner (TU1105)?

Are there the IF signal outputs (D_IF+/-) at the pins (11) and (10) of tuner

(TU1105)?

YES

Check TU1105 and its peripheral circuits

(TU_SDATA: Pin4 of TU1105

TU_SCLK: Pin5 of TU1105, etc.).

Check the line between TU1105 and IC4405, and

their peripheral circuits (C4463/C4464/R1158, etc.).

Is there the analog video signal input at pin (AK24) of IC3303

(CPU)?

Are there the TS signal outputs (ATSC_TS_D0/SYNC/CLK/VAL) at the

pins (33), (34), (37) and (38) of Demodulator (IC4405)?

YES

Check the line between IC3303 and TU1105, and

their peripheral circuits.

Check the line between IC4405 and IC3303, and

their peripheral circuits (R4450/R3365/R3432, etc.).

Is the T-CON PWB connected?

VBO_HTPDN (40pin), VBO_LOCKN (39pin) of P2604 become Low if there is no

problem in the connection.

NO Check the panel module and harness.

YES

Are the V-By-One signal input to the pin of P2604?

VBO_CN_TXA+/- (36/37pin), VBO_CN_TXB+/- (32/33pin),

VBO_CN_TXC+/- (28/29pin), VBO_CN_TXD+/- (24/25pin).

NO Check IC3303 and its peripheral circuits.

(IC3501/IC3502/IC3503, etc.)

YES

Check the panel module and harness.

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Sharp AQUOS LC-60C6400U Wartungshandbuch Seite 62