Sharp LC-65GD1E (serv.man2) Service Manual ▷ View online
53
TU-65GD1E
LC-65GD1E
LC-65GD1E
TROUBLESHOOTING TABLE
(Continued)
No picture (2)
Set-up Confir
mation :
1) Are the input ter
minal in the bac
kside of A
VC-System and "INPUT SOURCE" of the remote controller set up correctly?
•••
Please set up desired "INPUT SOURCE" with ref
erence to Oper
ation
Man
ual.
2) Is "A
udio Only" in MENU-Option set "On"?
•••
Set it "Off".
Is the
VIDEO signal output to DISPLA
Y
-
OUTPUT1 (SC3103)?
No video output to the Displa
y.
<On input of the
T
uner e
xter
nal source>
Is the connection of the System cab
le
(WHITE) nor
mal?
Displa
y Side :
Is the
VIDEO signal input to the D
V
I-
Connector to DISPLA
Y OUTPUT1 (SC5302) ?
See the ter
m of "No picture" in Displa
y-
T
roub
leshooting.
YES
YES
NO
NO
YES
YES
Confir
m IC3300/IC802 on and bef
ore the
circuit of IC3201.
And see "No picture (1)" in
T
roub
leshooting.
In the
TMDS-TX PWB:
Is the
VIDEO signal
coming to the L
V
-Connector (SC2801)?
NO
YES
YES
In the
TMDS-TX PWB :
Chec
k
IC2802/IC3103 and per
ipher
al circuits
.
Chec
k IC3201 and per
ipher
al circuits
.
In the MAIN PWB :
Is the
VIDEO signal input
to IC3201 (L
VDS_TX)?
(DISPLA
Y SIDE)
(A
VC SIDE)
54
TU-65GD1E
LC-65GD1E
LC-65GD1E
TROUBLESHOOTING TABLE
(Continued)
No picture (3)
Is OSD including the men
u and the list of
prog
rams displa
y
ed in the panel?
No digital broadcasting displa
y
ed in the
panel of the liquid cr
ystal
TV
.
<On input of the digital tuner>
NO
Is the digital signal including Data and CLK
output to Pins (2-11)(13) of P8903?
NO
Chec
k P8903, IC8905, IC8601, IC8801 thr
u
8802, IC8804 thr
u 8805 and per
ipher
al
circuits
.
Are there no prob
lems with v
o
ltage at Pin (2)
of
TU9001 (5V) and Pin (50) and Pin (64) of
IC9008 (1.8V and 3.3V) respectiv
ely?
Is v
oltage at pin (2) (3) of CB-Connector
P9001 not lo
w
er than 10V?
NO
NO
Chec
k the
PO
WER UNIT
(RDENCA111WJZZ).
Is the DTV
-IN signal input to Pins (190-200)
of IC402 (3D-YC)?
NO
Chec
k betw
een IC402, SC2101 and P8903.
NO
Confir
m per
ipher
al circuits of
TU9001, and
tr
y to replace
TU9001.
Chec
k IC9001 thr
u 9002, IC9009 thr
u 9014,
IC9004 and per
ipher
al circuits
.
Is the
VIDEO signal output to Pins (124-
133) of IC402?
NO
Chec
k IC402 and per
ipher
al circuits
.
YES
YES
YES
YES
YES
YES
Is 4MHz CLK output from Pin (10) of
TU9001?
Chec
k the IF signal betw
een
TU9001-
IC9008 (62/61 pin), the
TD
A-D
A
T
A
signal
betw
een IC8601-IC9008, and per
ipher
al
circuits
.
YES
Chec
k circuits IC802/IC3300/IC3201 and
per
ipher
al ones
.
Set-up Confir
mation :
1) Is the "INPUT SOURCE" ( ) of the remote controller set up correctly?
•••
See the Oper
ation Man
ual and set the "INPUT SOURCE" to "DTV".
2) Is the "A
udio Only" in MENU-Option set to "On"?
•••
Set it "Off".
IC9008 (DECODER)
IC8601 (PR
OCESSOR)
IC8905 (ANALOG-COMP)
IC8801 (128M-SDRAM)
IC8802 (128M-SDRAM)
IC9001 (5.8V
-REG.)
IC9002 (3.3V
-REG.)
IC9004 (5V
-REG.)
IC9009 (9V
-REG.)
IC9010 (5V
-REG.)
IC9012 (1.8V
-REG.)
IC9103 (1.21V
-REG.)
IC9014 (5V
-REG.)
IC802 (FPGA.)
IC3300 (CIVIC)
IC3201 (L
VDS-TX)
(D
VB-T UNIT)
(D
VB-T UNIT)
(MAIN UNIT)
55
TU-65GD1E
LC-65GD1E
LC-65GD1E
TROUBLESHOOTING TABLE
(Continued)
No picture (4)
Is the CVBS signal output from Pin (24) of
P8903?
(D
VB-T
-UNIT)
(A
V
-UNIT)
(A
V
-UNIT)
No digital broadcasting video output to the
Monitor/Record output ter
m
inal.
<On input of the digital tuner>
NO
Is the DTV
-CVBS signal input to Pin (4) of
IC3800 (SELECT
OR)?
Chec
k the MA-Connector (P3802)(P7201)
and the connection of B/B (SC2101)(P8903).
NO
Chec
k IC8905 and per
ipher
al circuits
.
YES
YES
YES
Is the digital signal including Data and CLK
input to Pins (69) thr
u
(79) of IC8905?
NO
Chec
k IC8801 thr
u
8802, IC8804 thr
u
8805,
IC8601 and per
ipher
al circuits
.
YES
YES
NO
Is the
VM signal output to Pin (2) of IC3800
(SELECT
OR)?
Is the L1-OUT signal input to Pin (1) of
IC3800.
Or chec
k the per
ipher
al circuits
.
NO
Is the
VM signal output to Pin (19) of
INPUT2=SCAR
T2 (J1102)?
NO
Is the
VM signal output to Pin (40) of
INPUT3=SCAR
T3 (J1102)?
NO
Is the
VM signal output to
INPUT3=COMPONENT3 (J1101)(1pin)?
Chec
k the connection with e
x
ter
nal A
V
unit.
Chec
k the Q1125 (MUTE) circuit, L2OUT
-
LINE and per
ipher
al circuits
.
Chec
k the Q1126 (MUTE) circuit, L3OUT
-
LINE and per
ipher
al circuits
.
Chec
k the contact, etc.
of Q1113 (B
UFFER)
and COMPONENT ter
m
inal (J1101).
56
TU-65GD1E
LC-65GD1E
LC-65GD1E
TROUBLESHOOTING TABLE
(Continued)
No picture (5)
No INPUT1 output of the e
xter
nal input
system.
Is "INPUT1" selected with the ( ) b
u
tton of the
remote controller?
Chec
k Pin (20) of SCAR
T1 (SC1101) thr
u
Pins (1)(3) of IC3801.
Select "INPUT1" with the ( ) b
utton of
the remote controller
, select Option-Input
Select in the MENU item, and then select
"CVBS" f
or Signal
T
ype of the input signal.
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
Is the Composite
Video signal (CVS1) input
to input ter
minals Pins (1)(3) of IC3801 (A
V
-
SW)?
No INPUT2 output of the e
xter
nal input
system.
Is "INPUT2" selected with the ( ) b
u
tton of the
remote controller?
Select "INPUT2" with the ( ) b
utton of
the remote controller
, select Option-Input
Select in the MENU item, and then select
"CVBS" f
or Signal
T
ype of the input signal.
Chec
k Pin (20) of SCAR
T2 (SC1102) thr
u
Pins (8)(10) of IC3801.
Chec
k IC3801 (A
V
-SW) and per
ipher
al
circuits
.
Chec
k IC3801 (A
V
-SW) thr
u
IC401/IC503/IC600.
Chec
k IC600 (LPF) thr
u IC601 (VPC).
The betw
een from IC802 (FPGA) to IC3300
(CIVIC) is chec
k
ed.
Or each e
xchange
.
Chec
k IC3201 (L
VDS_TX) and per
ipher
al
circuits
.
Chec
k IC3201 thr
u SC3200.
YES
YES
YES
YES
Is the Composite
Video signal (CVS2) input
to input ter
minals Pins (8)(10) of IC3801 (A
V
-
SW)?
<On input of the Composite
Video signal>
(A
V PWB):
Are MAIN-Video signal (YCV) and SUB-Video signal (SUB
.V) output to Pins (56) and (44) of IC3801 (A
V
-SW) respectiv
ely?
respectiv
ely?
<On input of the Composite
Video signal>
(MAIN PWB):
Are MAIN-Video signal (Y/V
OUT1) and SUB-Video signal (Y/V
OUT2) input to Pin (8) of IC401 (LPF)/Pin (2) of IC503 (LP
F) and Pin (2)
of IC600 (LPF) respectiv
ely?
Is the
VIDEO signal input to input ter
minals
of Pin (8) of IC402 (3D-YC) and Pin (16) of
IC502 (2D-YC)?
(MAIN Video
System)
Is the digital video signal output from Pins
(124) thr
u (135) of IC402 and Pins (115) thr
u
(128) of IC502?
Are the digital video signal and H/V
-SYNC
•LCLK signal input to Pins (51) thr
u (78)/Pins (79) thr
u (6) and Pins (7) thr
u (10) of IC3201 (L
VDS_TX)
respectiv
ely?
Is the digital video signal output to Pins (39) thr
u (49)/Pins (27) thr
u (37) of IC3201 (L
VDS_TX)?
Are the digital video signals (T
A
±
-
TD
±
) and (T
A2
±
-
TD2
±
) output to Pins (2) thr
u (15) of L
V
Connector (SC3200) and Pins (18) thr
u (31) of SC3200
respectiv
ely?
No prob
lem in the MAIN PWB
. Chec
k the
TMDS-TX PWB
. (See also the
TMDS-TX
T
roub
leshooting.)
Is the input/output signal of Pins (77) thr
u (99) of IC2802 - Pins (21) thr
u (31) of IC3103 in the
TMDS-TX PWB
Are the Connector SC3103 of DISPLA
Y_OUTPUT1 and the SYSTEM_CABLE nor
mal?
Chec
k the LCD_DISPLA
Y side
.(See also the Displa
y
T
roub
leshooting.)
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Chec
k IC401 (LPF)/IC503 (LPF) thr
u IC402
(3D-YC)/IC502 (2D-YC).
NO
Chec
k IC402 (3D-YC), IC502 (2D-YC) and
per
ipher
al circuits
.
NO
YES
YES
Is the
VIDEO signal input to the input
ter
minal Pin (72) of IC601 (VPC)?
(SUB Video
System)
Is the digital video signal output from Pins
(41) thr
u (50) of IC601?
Chec
k IC601 (VPC) and per
ipher
al circuits
.
Chec
k the input/output signal of
IC2802/IC3103 in the
TMDS-TX PWB and
per
ipher
al circuits
.
Chec
k the Connector SC3103 of
DISPLA
Y_OUTPUT1 and the
SYSTEM_CABLE.
<On input of the Composite
Video signal>
Click on the first or last page to see other LC-65GD1E (serv.man2) service manuals if exist.