Chapter 6. Trouble Shooting Table; Trouble Shooting Table - Sharp LC-32D62U Service Manual

CHAPTER 6.
LC-32D62U/LC-37D62U 1st

TROUBLE SHOOTING TABLE

[1] TROUBLE SHOOTING TABLE
COMPOSITE: No external input video
[INPUT-1]
Is INPUT-1 selected on the
input select menu screen? Is
the INPUT-SELECT for the
input signal?
YES
Is there the COMPOSITE
video signal input at pin (71)
of IC501 (AV_SWITCH)?
YES
Is there the COMPOSITE video signal output at pin (60) of IC501?
Is there the COMPOSITE video signal output at pin (2) of connector (SC501) on the TERMINAL unit?
Is there the COMPOSITE video signal input at pin (2) of connector (SC1101) on the MAIN unit?
Is there the COMPOSITE video signal input at pins (M4, N4) 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.
NO Select INPUT-1 on the input
select menu screen for the
right input signal.
Does the INPUT-1 V2.PLUG
detection function?
Check the line between pin
(6) of input terminal (J508)
and pin (76) of IC501
(AV_SWITCH).
NO Check the line between pin
(7) of J508 and pin (71) of
IC501.
YES
YES
YES
YES
YES
Service Manual
No video (1)
COMPOSITE: No external input video
Is INPUT-2 selected on the
input select menu screen?
YES
Is there the COMPOSITE
video signal input at pin (3)
of IC501 (AV_SWITCH)?
YES
6 – 1
LC-32D62U/LC-37D62U 1st
[INPUT-2]
NO Select INPUT-2 on the input
select menu screen.
Does the INPUT-2 V3.PLUG
detection function?
Check the line between pin
(6) of input terminal (J509)
and pin (2) of IC501
(AV_SWITCH).
NO Check the line between pin
(7) of J509 and pin (3) of
IC501.
NO Check IC501 and its periph-
eral circuits.
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 and IC3301 (Q2201
thru Q2203, Q2205, Q2207,
Q2209, etc.).
NO Check IC3301 and its
peripheral control circuits
(IC3501, IC3502, IC8101,
etc.).