Sharp LC-42D65U Service Manual page 44

LC-42D65U
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 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
Check TU1101 and its peripheral
circuits. (SDA3/SCL3, etc.)
NO
Check the line between IC8001
and TU1101, and their periph-
eral circuits. (Q1103, etc.)
YES
No video (4)
No video at digital broadcast signal reception
Are there the video signal outputs (IF_P/N) at the pins(19) and (20) of
tuner(TU1101)?
YES
Are there the video signal inputs at pin(AM33) and (AM34) of
IC8001(CPU)?
YES
Check IC8001 and its peripheral circuits. (IC8151 thru IC8154, etc.)
6 – 4
NO
Check TU1101 and its peripheral
circuits. (SDA3/SCL3, etc.)
NO
Check the line between IC8001
and TU1101, and their periph-
eral circuits. (L1101, C1103, etc.)
NO