Sharp LC-60E77UN Service Manual page 52

LC-60E77UN/LC-65E77UM/LC-C6077UN/LC-C6577UM
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 (15) of tuner
(TU1102)?
NO
Check TU1102 and its peripheral circuits
(TUN_SDA: Pin6 of TU1102
TUN_SCL: Pin7 of TU1102, etc.).
YES
Is there the analog video signal input at pin (AD29) of IC8001
(CPU)?
NO
Check the line between IC8001 and TU1102,
and their peripheral circuits.
YES
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).
YES
Check the panel module.
No video (4)
No video at digital broadcast signal reception
Are there the video signal outputs (IF_P/N) at the pins (9) and (10) of
tuner (TU1102)?
Check TU1102 and its peripheral circuits
(TUN_SDA: Pin6 of TU1102
TUN_SCL: Pin7 of TU1102, etc.).
YES
Are there the video signal inputs at pin (AA29) and (AB29) of IC8001
(CPU)?
Check the line between IC8001 and TU1102, and
their peripheral circuits (C1129/C1130, etc.).
YES
NO
6 – 4
NO
NO
Check IC8001 and its peripheral circuits
(IC8152/IC8153, etc.).