Sharp LC-32D62U Service Manual page 34

LC-32D62U/LC-37D62U 1st
COMPONENT: No external input video
[INPUT-1]
Is INPUT-1 selected on the input select
menu screen? Is the INPUT-SELECT for the
input signal?
NO
Select INPUT-1 on the input
select menu screen for the right
input signal.
Does the INPUT-1 C2.PLUG
detection function?
Check the line between pin (6)
of input terminal (J502) and pin
(40) of IC501 (AV_SWITCH).
YES
Is there the COMPONENT video signal
input at pins (27) (Y) / (29) (PB) and (31)
(PR) of IC501 (AV_SWITCH)?
NO
Check the line between the
input terminals of J502 and
IC501.
YES
Is there the COMPONENT video signal output at pins (60) (Y) / (59) (PB) and (58) (PR) of
IC501?
[COMPOSITE signal input] Is there the COMPONENT video signal output at pins (2), (4) and (6) of connector (SC501) on the TERMINAL unit?
[S-VIDEO signal input] Is there the video signal output at pins (2) (Y) and (4) (C) of connector (SC501) on the TERMINAL unit?
[COMPOSITE signal input] Is there the COMPONENT video signal input at pins (2), (4) and (6) of
connector (SC1101) on the MAIN unit?
[S-VIDEO signal input] Is there the video signal input at pins (2) (Y) and (4) (C) of connector
(SC1101) on the MAIN unit?
[COMPOSITE signal input] Is there the COMPONENT video signal input at pins (U3) (Y) / (AA1)
(PB) and (W3) (PR) of IC3301 (VPC)?
[S-VIDEO signal input] Is there the video signal input at pins (M4, N4) (Y) and (T1) (C) of IC3301
(VPC)?
Is there the LVDS signal output at the LVDS 1st channel and 2nd channel of IC3301?
TA2_P/M (AJ30/AK30), TB2_P/M (AJ29/AK29), TC2_P/M (AJ28/AK28), TD2_P/M (AJ26/AK26),
TE2_P/M (AJ25/AK25), TCLK2_P/M (AJ27/AK27), TA1_P/M (AB29/AB30), TB1_P/M (AC29/
AC30), TC1_P/M (AD29/AD30), TD1_P/M (AF29/AF30), TE1_P/M (AG29/AG30), TCLK1_P/M
(AE29/AE30)
Check the panel module.
COMPONENT: No external input video
Is INPUT-3 selected on the input select
menu screen? Is the INPUT-SELECT for the
input signal?
YES
Is there the COMPONENT video signal input
at pins (21) (Y) / (23) (PB) and (25) (PR) of
IC501 (AV_SWITCH)?
YES
YES
YES
YES
YES
YES
No video (2)
[INPUT-3]
NO
Select INPUT-3 on the input
select menu screen for the right
input signal.
Does the INPUT-3 C1.PLUG
detection function?
Check the line between pin (6)
of input terminal (J507) and pin
(38) of IC501 (AV_SWITCH).
NO
Check the line between the
input terminals of J507 and
IC501.
NO
Check IC501 and its peripheral
circuits.
6 – 2
S-VIDEO: No external input video
[INPUT-2]
Is INPUT-2 selected on the input select menu
screen?
NO
Does the INPUT-2 S3.PLUG
detection function?
Check the line between pin (6)
of input terminal (J503) and pin
(42) of IC501 (AV_SWITCH).
YES
Is there the S-VIDEO signal input at pins (5)
(Y) and (7) (C) of IC501 (AV_SWITCH)?
NO
Check the line between pins (3)
(Y) / (4) (C) of J503 and pins (5)
/ (7) of IC501.
YES
NO
Check the line between IC501
and SC501 (Q501 thru Q504,
etc.).
NO Check the SC501 and SC1101
connectors.
NO Check the line between
SC1101, IC3301 and its periph-
ery circuits.
NO Check the line between SC1101
and IC3301 (Q2201 thru
Q2203, Q2205, Q2207. Q2209,
etc.).
NO Check IC3301 and its periph-
eral control circuits (IC3501,
IC3502, IC8101, etc.).