Sharp LC-65GD1E (serv.man2) Service Manual ▷ View online
49
TU-65GD1E
LC-65GD1E
LC-65GD1E
TROUBLESHOOTING TABLE
(Continued)
No sound (2) (On the reception of
TV br
oadcasting)
No Displa
y audio output.
1) Is a Headphone connected?
•••
Disconnect it.
2) In the MENU-Option, is "A
udio Out" set to "V
ar
iab
le"?
•••
Set it "Fix
ed".
3) In the MENU-Option, is "Centre Channel input" set to "on"?
•••
Set it "off".
4) In the MENU-Set up
, is "Speak
er Setup" set to "SPEAKER-B"?
•••
Set it "SPEAKER-A".
YES
NO
NO
NO
NO
YES
YES
YES
NO
In the A
UDIO-IF PWB :
Is the A
UDIO
signal coming to RELA
Y R
Y6000 and
R
Y6001?
In the A
UDIO-IF PWB :
Is the A
UDIO
signal input to SC-Connector (P6003)?
Is the A
UDIO signal input to the 1 bit-
AMP UNIT?
In the A
V
UNIT :
Is the A
UDIO signal
output to Pins (28)(29) of IC2514?
Confir
m IC2514 (CODEC), IC2501 (MSP)
and per
ipher
al circuits
.
In the A
UDIO-IF PWB :
Is the A
UDIO
signal output to DISPLA
Y
-OUTPUT3
(SC6001)?
Is the connection of System cab
le (b
lac
k)
nor
mal?
(Displa
y Side)
Displa
y Side :
Is the A
UDIO signal input to
A
UDIO-Connector (J5301) and SO-
Connector (P5301)?
Displa
y side :
Inside of SPEAKER
TERMINAL-UNIT is connection of SO-
Connector (P202) and SP-TERMINAL-A
(J203) nor
mal?
Chec
k the connection in Speak
er-UNIT
and the speak
er
.
(A
VC Side)
(A
VC Side)
50
TU-65GD1E
LC-65GD1E
LC-65GD1E
TROUBLESHOOTING TABLE
(Continued)
No sound (4) (A
udio fr
om e
xternal input terminals (Center c
hannel))
Connect an e
xter
nal unit to CENTRE CHANNEL INPUT
. Does the audio
come out of Displa
y-Speak
er?
Is there the audio signal input at pin (2) of the CENTRE-CHANNEL-
INPUT ter
minal (J1102)?
Are the inputs at pins (1) and (2) and the output at pin (9), all on IC2515
(A/D-CON), as specified?
Chec
k IC2515 (A/D-CON) po
w
er line pin (6) (5V) and pin (7) (3.3V) and
their per
ipher
al circuits
.
Chec
k the 1bit AMP
, A
UDIO IF UNIT circuitr
y, DISPLA
Y OUTPUT 3
ter
minal (SC6001) and their per
ipher
al circuits
.
Chec
k the CENTRE CHANNEL INPUT ter
minal (J1102) f
or shor
t-
circuit, wrong contact, poor solder
ing, etc.
YES
YES
Are the input at pin (26) of IC2510 (S-DSP) and the outputs at pins (28)
and (29) of IC2514 (Codec) as specified?
Is there the audio signal at 1bit AMP
, A
UDIO IF UNIT circuitr
y and
DISPLA
Y OUTPUT 3 (SC6001)?
Chec
k the system cab
le and displa
y b
loc
k.
Chec
k IC2510 (S-DSP), IC2514 (Codec), po
w
er line and their
per
ipher
al circuits
.
NO
NO
NO
NO
YES
YES
In the MENU-Option, is "Centre Channel input" set to "off"? ···Set it
"On".
No sound (3) (Output fr
om e
xternal terminals)
No Head phone sound output.
Is the signal of "HP_R/L_IN" output to Pins
(26)(27) of IC2514 (CODEC)?
Chec
k the Headphone ter
minal (J2402) and
per
ipher
al circuits
.
No audio output from Exter
nal Speak
ers
.
(SPEAKER-
B
T
e
rm
inal)
In the A
UDIO-IF PWB :
Is RELA
Y (R
Y6000)
nor
mally oper
ated?
In the A
UDIO-IF PWB :
Is the "H" signal
coming to "SP-SW" of Pin (1) (P6002) of
SF-Connector?
In the A
V PWB :
Is the "H" signal output to
Pin (6) of IC3808 (SP Switch)?
In the A
V PWB:
Confir
m IC3808 SD
A3-
1/SCL3-1 LINE and per
ipher
al circuits
.
Is "Speak
er Setup" in the MENU-Set up set
to "SPEAKER-A"?
If not, set the "SPEAKER-B".
No audio output from Digital-A
udio-OUT
(IC1109).
YES
Is the "HP-R/L" signal outputed to Pins (1)(7)
of IC2502 (H.P
._AMP)? Or is Q2501
(H.P
._MUTE) circuit nor
mal?
YES
YES
NO
NO
NO
NO
NO
NO
YES
YES
Chec
k the "HP-PLUG" signal Line
.
Chec
k Pin (4) of Headphone (J2402) thr
u
Pin (13) of P2402, Pin (11) of IC2509.
Is input into Optical-Fiber
T
ransmitter
(IC1109) nor
mal?
Chec
k the SPDIF signal from Pin (40) of
MA-Connector (P3802) and Pin (15) of B/B-
Connector (P8903).
Replace IC2507 or chec
k per
ipher
al circuits
.
Replace IC8601 or chec
k per
ipher
al circuits
.
Chec
k or replace the
po
w
er line of Optical-
Fiber T
ransmitter
YES
NO
YES
YES
NO
In the A
V PWB:
Is output from Pin (8) of
IC2507(OPT
-SW) nor
mal?
Is the SPDIF signal coming to Pin (12) of
IC2507 (OPT
-SW) nor
mal?
In the D
VB-T PWB :
Is SPDIF signal output
from Pin (2) of IC8903 (INV)?
Is output from Pin (A
C16) of IC8601
(Processor) nor
mal?
(At digital broadcast reception)
Chec
k betw
een pin (8) of
IC2507 and
T
ransmitter
(IC1109).
YES
51
TU-65GD1E
LC-65GD1E
LC-65GD1E
No sound (6) (On the reception of
TV br
oadcasting,
audio fr
om the SCAR
T terminal to the e
xternal de
vice)
No sound (5) (A
udio fr
om e
xternal input terminals)
YES
YES
NO
NO
NO
NO
NO
YES
YES
No audio output from INPUT1
Te
rminal.
No audio output from INPUT2 and
INPUT3 T
e
rm
inals
.
YES
Is output(S_L_R
OUT) from Pins
(27)(28) of IC2501 (MSP) nor
mal?
Confir
m Pins (23)(27) of SC1102
thr
u Pins (16)(18) of IC3801.
Confir
m Pins (5)(7) of J2404 thr
u
Pins (23)(25) of IC3801.
Is the A
UDIO input signal to Pins
(56)(57) of IC2501 (MSP) nor
mal?
NO
Chec
k IC2501 (MSP) e
xchange or
per
ipher
al circuits
.
NO
Chec
k IC2514 (CODEC) or
per
ipher
al circuits
.
YES
Is an IC2514 (28)(29) pins output
nor
mal?
1 bit-AMP and A
UDIO-IF-UNIT are
chec
k
ed.
Chec
k the outputs at pins (33),
(34) of IC2501 (MSP) and at pins
(32), (33) of IC2514 their
per
ipher
al circuits
.
Confir
m Pins (2)(6) of SC1102
thr
u Pins (9)(11) of IC3801.
Confir
m Pins (2)(6) of SC1101
thr
u Pins (2)(4) of IC3801.
Chec
k the D
VI-L/R signal betw
een
AD-Connector (P3805) of INPUT5-
D
VI-A
UDIO-T
er
minal (J1900) to
AV
-UNIT
.
YES
Are the signals betw
een pins
(27)/(28) of IC2501 and pins (1)/(3)
of SCAR
T2 (SC1102) and pins
(22)/(24) of SCAR
T3 (SC1102)
nor
mal?
Q1105, Q1106, Q1110, Q1111
Chec
k Q1104, Q1107, Q1109 and
Q1112 of the S-MUTE circuit and
S-MUTE-LINE.
Is the v
oice signal (SIF 1/2)
inputted into (67) and (69) pin of
IC2501(MSP)?
Is the output (L/R-OUT) of
IC2501(MSP)(24) and (25) pin
nor
mal?
Is the signal (L/R-OUT1) to pins
(24) and (25) of IC2501 to pins (1)
and (3) of SCAR
T1 (SC1101)
nor
mal?
YES
YES
YES
Chec
k Q1101 and Q1102 of the S-
Mute circuit and S-MUTE-LINE.
No audio signals input from
INPUT1 thr
u INPUT4
T
e
rminals
.
YES
Is the signal input from each
ter
minal to IC3801 (A
V
-SW)
nor
mal?
<INPUT1>
Is the input signal (SL1/SR1) to
Pins (2)(4) of IC3801 (A
V
-SW)
nor
mal?
<INPUT2>
Is the input signal (SL2/SR2) to
Pins (9)(11) of IC3801 (A
V
-SW)
nor
mal?
<INPUT3>
Is the input signal (SL3/SR3) to
Pins (16)(18) of IC3801 (A
V
-SW)
nor
mal?
YES
<INPUT4>
Is the input signal (V4L/V4R) to
Pins (23)(25) of IC3801 (A
V
-SW)
nor
mal?
NO
Is the A
UDIO output signal (MAIN-
L/R) from Pins (52)(54) of IC3801
(A
V
-SW) nor
mal?
Replace IC3801 (A
V
-SW) or chec
k
per
ipher
al circuits
.
Replace IC3801 (A
V
-SW) or chec
k
per
ipher
al circuits
.
No audio signals input from the
INPUT5 D
VI-A
UDIO
T
e
rminal.
YES
<INPUT5>
Is the input signal (PC-L/R) to Pins
(29)(31) of IC3801 (A
V
-SW)
nor
mal?
NO
Is the A
UDIO output signal (MAIN-
L/R) from Pins (52)(54) of IC3801
(A
V
-SW) nor
mal?
TROUBLESHOOTING TABLE
(Continued)
52
TU-65GD1E
LC-65GD1E
LC-65GD1E
TROUBLESHOOTING TABLE
(Continued)
YES
YES
YES
YES
YES
YES
YES
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.
Is the digital video signal output from Pins
(124) thr
u
(133) of IC402 and Pins (115) thr
u
(126) 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 L
VDS video signal output to Pins (39) thr
u
(49)/Pins (27) thr
u
(37) of IC3201 (L
VDS_TX)?
Are the L
VDS 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
Chec
k IC402 (3D-YC), IC502 (2D-YC) and
per
ipher
al circuits
.
NO
YES
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.
(MAIN Video
System)
(SUB Video
System)
No picture (1)
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 "TV".
2) Is the "A
udio Only" in MENU-Option set to "On"?
•••
Set it "Off".
Is there video signal (CVBS) output at pin (17)
(Video output ter
minal) of
Tuner(TU1101)?
<On input of the tuner (U/V)>
Is there video signal input at pin (7) of
IC1106 (VCA-Amp)?
Is there video signal output at pin (5) of
IC1106 (VCA-Amp)?
Is there video signal (CVBS) input at pin (63)
of IC3801 (A
V
-SW)?
YES
YES
YES
YES
YES
YES
YES
(A
V PWB):
Are the MAIN-Video (YCV) and SUB-Video (SUB
.V) signal output to Pin (56) and Pin (44) of IC3801 respectiv
ely?
Is the
VIDEO signal input to input ter
m
inals
of Pin (8) of IC402 (3D-YC) and Pin (16) of
IC502 (2D-YC)?
Chec
k betw
een IC1106 and IC3801.
Chec
k the tuner (TU1101) and its per
ipher
al
circuits
.
Chec
k IC401 (LPF) /IC503 (LPF) thr
u
IC402
(3D-YC)/IC502 (2D-YC).
NO
NO
NO
NO
NO
Is the
VIDEO signal input to the input
ter
m
inal Pin (72) of IC601 (VPC)?
Chec
k IC3801 (A
V
-SW) and per
ipher
al
circuits
.
Chec
k Pins (56)(44) of IC3801 thr
u
IC401/IC503/IC600 and MA-CONNECT
OR.
Chec
k IC600 (LPF) thr
u
IC601 (VPC).
NO
NO
NO
(MAIN PWB):
Are the MAIN-Video (Y/V
OUT1) and SUB-Video (Y/V
OUT2) signal input to Pin (8) of IC401/Pin (2) of IC503 and Pin (2)
of IC600 respectiv
ely?
Chec
k betw
een the tuner and IC1106.
Chec
k IC1106 and its per
ipher
al circuits
.
No video output on the tuner (U/V) reception.
Click on the first or last page to see other LC-65GD1E (serv.man2) service manuals if exist.