LC-42D64U/46D64U/52D64U
4 – 4
No video (4)
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 (VIDEO) at pin(13) of
tuner(TU1101)?
Are there the video signal outputs (IF_OUT_P/N) at the pins(19) and
(20) of tuner(TU1101)?
YES
NO
YES
NO
Check TU1101 and its peripheral
circuits (SDA/SCL_3_5, etc.).
Check TU1101 and its peripheral
circuits (SDA/SCL_3_5, etc.).
Is there the analog video signal output at pin (61) of connector
(SC501) on the TERMINAL unit?
Are there the video signal outputs at pins (72) and (70) of connector
(SC501) on the TERMINAL unit?
YES
NO
YES
NO
Check the line between TU1101
and SC501 (Q510, etc.).
Check the line between TU1101
and SC501.
Is there the analog video signal input at pin (61) of connector
(SC2203) on the MAIN unit?
Are there the video signal inputs at pins (72) and (70) of connector
(SC2203) on the MAIN unit?
YES
NO
YES
NO
Check the line between SC2203
and SC501 connectors.
Check the line between SC2203
and SC501 connectors.
Is there the analog video signal input at pin (AM19) of IC8001 (CPU)? Are there the video signal inputs at pin (AM33) and (AM34) of IC8001
(CPU)?
YES
NO
YES
NO
Check the line between IC8001
and SC2203 (Q2214, etc.).
Check the line between IC8001
and SC2203 (L2204, C2229,
etc.).
Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of IC8001?
LVDS_TX_0_DATA0_P/N (C7/B7), LVDS_TX_0_DATA1_P/N (E7/D7), LVDS_TX_0_DATA2_P/N (C6/B6), LVDS_TX_0_DATA3_P/N (C5/B5),
LVDS_TX_0_DATA4_P/N (E5/D5), LVDS_TX_0_CLK_P/N(E6/D6),
LVDS_TX_1_DATA0_P/N (B4/A4), LVDS_TX_1_DATA1_P/N (E4/D4), LVDS_TX_1_DATA2_P/N (B3/A3), LVDS_TX_1_DATA3_P/N (B1/B2),
LVDS_TX_1_DATA4_P/N (F5/F6), LVDS_TX_1_CLK_P/N (C2/C3)
YES NO
Check the panel module. Check IC8001 and its peripheral
circuits. (IC8151 thru IC8154,
etc.)
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