Sharp LC-65D64U Service Manual page 39

No video at UHF/VHF 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)?
YES
Is there the analog video signal input (TUN_CVBS) at pin(40) of
IC501(AV_SW)?
YES
Is there the analog video signal output at pin(30) of IC501?
YES
Is there the analog video signal output at pin(59) of connector(SC501)
on the TERMINAL unit?
YES
Is there the analog video signal input at pin(59) of connector(SC2203)
on the MAIN unit?
YES
Is there the analog video signal input at pin(AM19) of IC8001(CPU)?
YES
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),
Check the panel module.
No video (4)
NO
Check TU1101 and its peripheral
circuits (SDA/SCL_3_5, etc.).
NO
Check the line between pin(13) of
TU1101 and pin(40) of
IC501(AV_SW).
NO
Check IC501 and its peripheral
circuits.
NO
Check the line between IC501
and SC501(Q501 and Q502,
etc.).
NO
Check the line between SC2203
and SC501 connectors.
NO
Check the line between IC8001
and SC2203 (Q2214, etc.).
YES
No video at digital broadcast signal reception
Are there the video signal outputs (IF_OUT_P/N) at the pins(19) and
(20) of tuner(TU1101)?
YES
Are there the video signal outputs at pins(70) and (72) of connec-
tor(SC501) on the TERMINAL unit?
YES
Are there the video signal inputs at pins(70) and (72) of connec-
tor(SC2203) on the MAIN unit?
YES
Are there the video signal inputs at pin(AM33) and (AM34) of
IC8001(CPU)?
YES
6 – 5
LC-65D64U
NO
Check TU1101 and its peripheral
circuits (SDA/SCL_3_5, etc.).
NO
Check the line between TU1101
and SC501.
NO
Check the line between SC2203
and SC501 connectors.
NO
Check the line between IC8001
and SC2203 (L2204, C2229,
etc.).
NO
Check IC8001 and its peripheral
circuits.(IC8151 thru IC8154, etc.)