Sharp LC-37D64U Service Manual page 47

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)?
Check TU1101 and its peripheral circuits.(SDA/
SCL_3_5, etc.)
YES
Is there the analog video signal output at pin(79) of connector(SC501)
on the TERMINAL unit?
Check the line between TU1101 and
SC501.(Q510, etc.)
YES
Is there the analog video signal input at pin(79) of connector(SC2203)
on the MAIN unit?
Check the line between SC2203 and SC501 con-
nectors.
YES
Is there the analog video signal input at pin(AM19) of IC8001(CPU)?
Check the line between IC8001 and SC2203.
(Q2214, etc.)
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
NO
NO
NO
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)?
Check TU1101 and its peripheral circuits.(SDA/
SCL_3_5, etc.)
YES
Are there the video signal outputs at pins(5) and (7) of connec-
tor(SC501) on the TERMINAL unit?
Check the line between TU1101 and SC501.
YES
Are there the video signal inputs at pins(5) and (7) of connec-
tor(SC2203) on the MAIN unit?
Check the line between SC2203 and SC501 con-
nectors.
YES
Are there the video signal inputs at pin(AM33) and (AM34) of
IC8001(CPU)?
Check the line between IC8001 and SC2203.
(L2204, C2229, etc.)
YES
Check IC8001 and its peripheral circuits.(IC8151 thru IC8154, etc.)
6 – 4
LC-32/37D64U
NO
NO
NO
NO
NO