Troubleshooting Table - Sharp LC-46D64U Service Manual

CHAPTER 4.
LC42D64U

TROUBLESHOOTING TABLE

[1] TROUBLESHOOTING TABLE
COMPOSITE: No external input video
[INPUT-1]
Is INPUT-1 selected on the input select
menu screen?
NO
Select INPUT-1 on the input
select menu screen for the right
input signal.
Does the INPUT-1 V3_PLUG
detection function?
Check the line between pin (7)
of input terminal (J501) and pin
(37) of IC501 (AV_SW).
YES
Is there the COMPOSITE signal input at pin
(38) of IC501 (AV_SW)?
NO
Check the line between pin (6)
of J501 and pin (38) of IC501.
YES
Is there the COMPOSITE video signal output at pin(30) of IC501?
Is there the COMPOSITE video signal output at pin(59) of connector(SC501) on the TERMINAL
unit?
Is there the COMPOSITE video signal input at pin(59) of connector(SC2203) on the MAIN unit?
Is there the COMPOSITE signal input at pin(AN16) of IC8001(CPU)?
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.
Service Manual
No video (1)
COMPOSITE: No external input video
[INPUT-2]
Is INPUT-2 selected on the input select menu
screen?
NO
Select INPUT-2 on the input
select menu screen for the right
input signal.
Does the INPUT-2 V2_PLUG
detection function?
Check the line between pin (7) of
input terminal (J503) and pin (35)
of IC501 (AV_SW).
YES
Is there the COMPOSITE video signal input at
pin (36) of IC501 (AV_SWITCH)?
NO
Check the line between pin (6) of
J503 and pin (36) of IC501.
YES
YES
YES
YES
YES
YES
4 – 1
LC-42D64U/46D64U/52D64U
COMPOSITE: No external input video
[INPUT-3]
Is INPUT-3 selected on the input select
menu screen?
NO
Select INPUT-3 on the input
select menu screen for the right
input signal.
Does the INPUT-1 V1_PLUG
detection function?
Check the line between pin (7)
of input terminal (J901) and pin
(33) of IC501 (AV_SW).
J901 pin (7) P901 pin (7)
YES
P501 pin (7)
(33)
Is there the COMPOSITE signal input at
pin(34) of IC501(AV_SW)?
NO
Check the line between pin (6)
of J901 and pin (34) of IC501.
J901 pin (6) P901 pin (5)
P501 pin (5)
YES
(34)
NO Check IC501 and its peripheral
circuits.
Check the line between IC501
NO
and SC501 (Q501 and Q502,
etc.).
NO Check the line between SC501
and SC2203 connectors.
NO Check the line between SC2203
and IC8001 (Q2216, etc.).
Check IC8001 and its peripheral
circuits.(IC8151 thru IC8154,
etc.)
NO
IC501 pin
IC501 pin