LC-46SB57U/LC-52SB57U
6 – 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 (19) of tuner
(TU1101)?
Are there the video signal outputs (IF_P/N) at the pins (12) and (13) of
tuner (TU1101)?
YES
NO
YES
NO
Check TU1101 and its peripheral circuits
(TUN_SDA: Pin8 of TU1101
TUN_SCL: Pin9 of TU1101, etc.).
Check TU1101 and its peripheral circuits
(TUN_SDA: Pin8 of TU1101
TUN_SCL: Pin9 of TU1101, etc.).
Is there the analog video signal input at pin (AD29) of IC8001
(CPU)?
Are there the video signal inputs at pin (AA29) and (AB29) of IC8001
(CPU)?
YES
NO
YES
NO
Check the line between IC8001 and TU1101,
and their peripheral circuits.
Check the line between IC8001 and TU1101, and
their peripheral circuits (C1129/C1130, etc.).
Are the LVDS signal outputs at the LVDS 1st channel and 2nd channel of IC8001?
LVDS_TX_0_DATA0_P/N (C14/D14), LVDS_TX_0_DATA1_P/N (C15/D15),
LVDS_TX_0_DATA2_P/N (C16/D16), LVDS_TX_0_DATA3_P/N (C18/D18),
LVDS_TX_0_DATA4_P/N (C19/D19), LVDS_TX_0_CLK_P/N (C17/D17),
LVDS_TX_1_DATA0_P/N (A14/B14), LVDS_TX_1_DATA1_P/N (A15/B15),
LVDS_TX_1_DATA2_P/N (A16/B16), LVDS_TX_1_DATA3_P/N (A18/B18),
LVDS_TX_1_DATA4_P/N (A19/B19), LVDS_TX_1_CLK_P/N (A17/B17).
NO Check IC8001 and its peripheral circuits.
(IC8152/IC8153, etc.)
YES
Check the panel module.
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