Sharp Aquos LC-45GD1E, Service Manual

Page: 55 / 281

55
TU-45GD1E
LC-45GD1E
TROUBLE SHOOTING TABLE
(Continued)
No picture (2)
No INPUT3 output of the external input system. <On input of the Composite V
ideo signal, COMPONENT
and S-V
ideo>
Is "INPUT3" selected with the ( ) button of the remote controller?
Check Pin (41) of INPUT3 (SC1
102) thru
Pins (15)(17) of IC3801. Check Pins (3)(8)(12) of the INPUT3- COMPONENT
terminal thru Pins
(15)(17)(19) of IC3805.
Select "INPUT3" with the ( ) button of the remote controller
, select Option-Input Select in the
MENU item, and then select "INPUT3" for Signal T
ype of the input signal.
YES YES YES YES YES YES YES
YES YES YES YES YES
Is the Composite V
ideo signal (CVS3) input
to input terminals Pins (15)(17) of IC3801 (A
V
-SW)?
<COMPONENT
video signal input>
Are there the
Y/PB/PR input signals at pins
(15), (17) and (19) of IC3805?
No INPUT4 output of the external input system.
Is "INPUT4" selected with the ( ) button of the remote controller?
Select "INPUT4" with the ( ) button of the remote controller
, select Option-Input Select in the
MENU item, and then select "INPUT4" for Signal T
ype of the input signal.
Check IC3801 (A
V
-SW) and peripheral
circuits. Check IC3801 (A
V
-SW) thru
IC401/IC503/IC600. Check IC600 (LPF) thru IC601 (VPC). Check IC402 (3D-YC), IC502 (2D-YC) and IC601 (VPC) thru IC3201 (L
VDS_TX), or
replace the main PWB. Check IC3201 (L
VDS_TX) and peripheral
circuits. Check IC3201 thru SC3200.
YES YES YES YES
<On input of the Composite V
ideo signal>
Are MAIN-V
ideo signal (YCV) and SUB-V
ideo signal (SUB.V) output to Pins (56) and (44)
of IC3801 (A
V
-SW) respectively?
<On input of the S-V
ideo signal>
Are the MAIN-Y
and MAIN-C signals output to Pin (56) and Pin (58) of IC3801(A
V-SW) respectivel
y,
and are the SUB-Y
and SUB-C signals output to Pin (44) and Pin (47) respectively?
<On input of the COMPONENT
V
ideo signal>
Are the MAIN-signal (Y/PB/PR) and SUB-signal (Y/PB/PR) output to Pins (50), (48) and (
46) and Pins (44), (42) and (40) of IC3805 respectively?
<On input of the Composite V
ideo signal>
Are the MAIN V
ideo signal and the SUB V
ideo signal input to Pin (8) of IC401 (LPF) / P
in (2) of IC503 (LPF) and Pin (2) of IC600 (LPF) respectively?
<On input of the S-V
ideo signal>
Are the MAIN-Y
and MAIN-C signals input to Pin (8) of IC401 (LPF)/Pin (2) of IC503 (LPF) and P
in (1
1) of IC401/Pin (6) of IC503 respectively
, and are the SUB-Y
and SUB-C signals input to Pin (2) and Pin (6) of IC600
(LPF) respectively? <On input of the COMPONENT
V
ideo signal>
Are the COMP1-MAIN and COMP2-SUB signals input to Pins (8),(10) and (13) of IC503 (LPF
) and Pins (8),(10) and (13) of IC600 (LPF) respectively?
Is the VIDEO signal input to the input terminals of Pin
(8) of IC402 (3D-YC)
and Pin (16) of IC502 (2D-YC)? <On input of the S-V
ideo signal>
Are the
Y
and C signals input to Pin (8) and Pin
(18) of IC402 respectively
, and are the
Y
and C signals input to Pin (16) and Pin
(12) of IC502 respectively?
<On input of the COMPONENT
V
ideo signal>
Are the
Y
, CB and CR
signals input to Pin (24), Pin (29) and Pin (32) of IC502 respectively?
(MAIN V
ideo System)
Is the digital video signal output from Pins (124) thru (133) of IC402 and Pins (1
15) thru
(126) of IC502?
Are the digital video signal and the H/V
-SYNCÆLCLK signal input to Pins (51) thru (78)/Pins (79) thru (6) and Pins (7) thru (10
) of IC3201 (L
VDS_TX)
Is the digital video signal output to Pins (39) thru (49)/Pins (27) thru (37) of IC3201 (L
VDS_TX)?
Are the digital video signals (T
A
±
-
TD
±
) and (T
A2
±
-
TD2
±
) output to Pins (2) thru (15) of L
V
Connector (SC3200) and Pins (18) thru (31) of SC3200?
No problem in the MAIN PWB. Check the
TMDS-TX PWB. (See also the
TMDS-TX
T
roubleshooting.
Is the input/output signal of Pins (77) thru (99) of IC2802~ Pins (21) thru (31) of IC3103 in the
TMDS-TX PWB normal?
Are the Connector SC3103 of DISPLA
Y_OUTPUT1 and SYSTEM_CABLE normal?
Check the LCD_DISPLA
Y
side. (See also the Display
T
roubleshooting.)
NO
NO NO NO NO NO NO NO NO NO NO
NO NO
Check the line between pin (2) of RCA
pin
(J2404) (INPUT4) and pin (22) of IC3801. Check INPUT4 and Pins (3)(4) of the S- T
erminal (J2401) thru the input terminal Pins
(24)(26) of IC3801 (A
V
-SW).
Is the V
ideo signal (V4-V) input to the input
terminal Pin (22) of IC3801 (A
V
-SW)?
<S video signal input> Are there the
Y/C signal input to the input
terminal pins (24) and (26) of IC3801?
NO NO
Check IC401 (LPF) / IC503 (LPF) thru IC402 (3D- YC)/IC502 (2D-YC).
NO
Check IC402 (3D-YC), IC502 (2D-YC) and peripheral circuits.
NO
YES
YES
Is the VIDEO signal input to the input terminal Pin (72) of IC601 (VPC)? <On input of the S-V
ideo signal>
Are the
Y
and C
signal input to Pin (72) and Pin (71) of IC601 respectively? <On input of the COMPONENT
V
ideo
signal>
Are the
Y
, CB and CR signals input
to Pin (2), (1) and (3) of IC601 respectively?
(SUB V
ideo System)
Is the digital video signal output from Pins (41) thru (50) of IC601?
Check IC601 (VPC) and peripheral circuits. Check the input/output signal of IC2802/IC3103 in the
TMDS-TX PWB and
peripheral circuits. Check the Connector SC3103 of DISPLA
Y_OUTPUT1 and SYSTEM_CABLE.