Sharp DV-760H (serv.man3) Service Manual ▷ View online
DV-700S
DV-760S/H
DV-760S/H
10-1
10.
TR
OUBLESHOO
TING
FLOW CHART NO.1
The power cannot be turned on.(1)
Is the fuse normal?
See FLOW CHART No.3 <The fuse blows out.>
No
No
Is normal state restored when once unplugged
power cord is plugged again after several
seconds?
Replace the fuse.
Yes
Yes
No
Is the AT 5V line voltage normal?
Check for leak or short-circuiting of primary
circuit component?
(Q9008,Q9010,D9016,T9001,D9012-3,C9021-
2,etc)
Yes
Is the voltage of AT 12V, AT -30V and filament
normal?
No
Check each rectifying circuit of secondary circuit.
FLOW CHART NO.2
FLOW CHART NO.3
The fuse blows out.
Is there leaking or short-circuited primary
component?
No
The power cannot be turned on.(2)
Does the change from STANDBY LED indicate
turn-off?
No
Is the supply voltage of 5V fed to pins(15) and (16)
of IC8201?
Check the AT 5V line.
Yes
No
Yes
No
Is the supply voltage about 5V fed to pin(3) of
IC8201?
Check the IC8202.
Yes
No
Is there 4.0MHz oscillation at pins(1) and (2) of
IC8201?
Check the FL8201 and IC8201.
Yes
No
Does the "L" signal inputted at pin(14) of IC8201,
when the POWER button activated on the DVD.
Check the S8151 and POWER KEY line.
Yes
The STANDBY LED indicate it flashing after the
0.5sec.
No
Does the remote control "L" signal inputted at
pin(4) of IC8201, when the POWER button
activated on the remote control unit?
Check the line between the remote control
receiver and the pin(4) of IC8201.
Yes
Yes (below, confirmed operating at LED turn-off of 0.5sec interval.)
Check for short-circuiting of rectifying diode and
circuit in each rectifying circuit of secondary side.
Replace IC8201.
Yes
Replace IC8201.
No
Are the "P–CON(L)" pulse outputted from the
pin(7) of IC8201?
Replace IC8201.
Yes
No
Does the P–CON switch circuit is operate normally?
Check each component and if poor the replace.
Yes
No
Are the "H" pulse inputted into the pin(9) of IC8201?
Check or replace D9035-9.
FLOW CHART NO.6
The fluorescent display tube does not light.
No
Is the supply voltage of 5V fed to pin(18) of
IC5001?
Check the AT 5V line.
Yes
No
Is the supply voltage of -30V fed to pin(16) of
IC5001?
Check the AT -30V line and Q9025.
Yes
No
Is there 4.0 MHz oscillation at pins(19) and (20) of
IC5001?
Check FL5001, IC5001 and their periphery.
Yes
No
Check the signal lines of FIP DA, FIP CK, FIP CS
of IC5001 and IC504.
Check or replace IC5001 and IC504.
FLOW CHART NO.7
The key operation is disabled.
No
Is key switch contact and installation state?
Replace key switch.
Yes
Is the control voltage normally into the pins(95)
and (96) of IC504?
No
Check the power circuit,D5001 and Q9026.
No
Check that the fluorescent display tube is free from
damages such as crack.
Yes
Are the filament voltage applied between (1) and
(62) of the fluorescent display tube?
Also negative voltage applied between these pins
and GND.
Yes
Check the fluorescent display tube and its periphery.
FLOW CHART NO.4
When the output voltage fluctuates.
No
Does the secondary side photocoupler circuit
operate normally?
Check the circuit and replace the parts.
(D9020, D9041, D9046, Q9028, etc.)
Yes
No
Does the primary side photocoupler circuit
operate normally?
Check the circuit and replace the parts.
(D9020, D9023, D9040, etc.)
FLOW CHART NO.5
When buzz is heard from the vicinity of power circuit.
Check for short-circuiting of rectifying diode and circuit in each rectifying circuit of secondary side.
(D9005-8,D9025,IC9001-3,Q9020-27,etc.)
Yes
Replace D9020.
KEY-1/2 INPUT
5.0V
4.3V
3.8V
3.1V
2.4V
1.9V
1.3V
0.6V
0V
OFF
S8106
STOP
S8105
S8154
S8104
S8103
S8101
S8153
STILL/PAUSE GAMMA
SKIP(+)
SKIP(-)
S.PICTURE
PLAY
KEY–1
KEY–2
DV-700S
DV-760S/H
DV-760S/H
10-2
FLOW CHART NO.9
PC 9V is not output.
Is 12V voltage supplied at pin(3) of IC9001?
No
Check the secondary circuit, AT 12V and PC 12V
line.
Yes
No
Is there output at pin(1) of IC9001?
Check the IC9001 periphery circuit.
Yes
Check for load circuit short-circuiting or leak.
FLOW CHART NO.10
PC 3.3V is not output.
Is 5V voltage supplied at pin(1) of IC9003?
No
Check the secondary circuit, AT 5V and PC 3.3V line.
Yes
Is there output at pin(2) of IC9003?
No
Check the IC9003 periphery circuit.
Yes
Check for load circuit short-circuiting or leak.
FLOW CHART NO.8
No operation is possible from the infrared remote control.
No
Operation is possible from the DVD, but no
operation is possible from the infrared remote
control.
Replace the remote control receiver or replace the
remote control transmitter is necessary.
Yes
Is 5V voltage supplied to the pin(3) terminal of
remote control receiver?
No
Check AT 5V line.
Yes
Is the "L" pulse sent out pin(1) terminal of receiver
when the infrared remote control is activated?
Yes
Replace IC504.
No
Replace the remote control receiver.
Yes
Is pulse signal supplied to the pin(32) of IC504?
No
Check the line between the remote control receiver
and the pin(32) of IC504.
FLOW CHART NO.11
The disc tray cannot be opened and closed.(For remote control is possible.)
No
Are the "L" pulse inputted into the pin(13) of
IC8201 when the KEY button is pressed?
Check the S8102 and OPEN/CLOSE KEY line.
Yes
No
Are the "L" pulse outputted from the pin(10) of
IC8201?
Replace IC8201.
Yes
No
Are the "L" pulse inputted into the pin(11) of
IC8201?
Check the TRAY ACK(L) line.
Yes
See FLOW CHART NO.12<The disc tray cannot
be opened and closed.>
FLOW CHART NO.12
The disc tray cannot be opened and closed.
No
Is the signal from the pins(70) and (69) of IC504
input into the pins(6) and (7) of iC702?
Check the LD-REV/FWD signal line between the
IC702 and the IC504.
Yes
No
Is loading motor drive voltage output from the
pins(10) and (11) of IC702?
Is 8V voltage applied to the pin(21) of IC702?
Yes
No
Is the loading motor drive voltage applied to the
pins(3) and (2) of AG connector?
Check the line between the IC702 and the AG connector.
Yes
Yes
Check for mechanism and gear engagement and
breakage.
Replace IC702.
Check AT 8V line.
No
No
No
No
Is FE signal inputted at pin(38) of IC707?
(Checking of symptom.)
Check the line between the pin(21) of IC303 and pin(38) of
IC707.
Yes
Yes
Is the focus control signal output to the pin(43) of
IC707?
Check the IC707 power source periphery circuit.
If it is normal, replace IC707.
Is the focus control signal from the pin(43) of IC504
input into the pin(19) of IC702?
Check the focus control signal (FOO) line between the
IC702 and the IC504.
Yes
No
Check the line between the IC702 and the AB connector.
No
Is the focus control drive voltage output from the
pins(17) and (18) of IC702?
Yes
Is the focus control drive voltage applied to the
pins(4) and (2) of AB connector?
Yes
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup.
No
No
No
No
The disc is ejected.
(In case of f
ocus error)
Does the objective lens of optical pickup move up
and down after the disc is removed?
(Checking of symptom).
See FLOW CHART NO.14<The disc is ejected. (In case
focus servo does not function.)>
Yes
Yes
Yes
Is FE signal output to the pin(21) of IC303 when the
disc is set?
Is there input signal on the pins (49, 54), (50, 55),
(46, 52), and (47, 53) of IC303?
Is there output signal on the pins(18),(17),(16) and (15) of
IC301?
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup.
FLOW CHART NO.13
FLOW CHART NO.14
The disc is ejected.
(In case of f
ocus ser
v
o
does not function.)
Is 8V voltage applied to the pin(21) of IC702?
Yes
Replace IC702.
Check AT 8V line.
No
DV-700S
DV-760S/H
DV-760S/H
10-3
Yes
Check the connection of optical pickup cable.
If it is normal, replace the optical pickup.
No
No
Is the Q301 (LD POWER ON) drive signal (SEL)
output to the pin(52) of IC707?
Is the Q307 (LD POWER CTL) drive signal (LDO1)
output to the pin(45) of IC303?
(Checking of symptom.)
Is 3.3V voltage applied to the emitter of Q301 and,
5V voltage applied to the emitter of Q307?
Yes
Yes
Are the 3.3V and 2.3V voltage supplied to the
pins(11) and (9) of AB connector, respectively?
Check the D_3.3V (1) line and the A_5V line.
No
FLOW CHART NO.15
The disc is ejected.
(When the laser beam does not light.)
Check the line between the pin(52) of IC707 and the
base of Q301 through Q304.
Ceck the line between the pin(45) of IC303 and the
base of Q307.
No
Check the line between the Q301, Q307 and AB connector.
Yes
Replace the main PWB unit.
No
No
Set the disc on the disc tray.
Is it possible to hold normally the disc with the check?
Yes
Yes
Is the level of RF signal which is output from the
pin(28) of IC303, normal?
Yes
Check the video amplifier unit and the audio amplifier unit. (IC2004-4, IC801-3)
Check for contamination of objective lens of optical pickup.
FLOW CHART NO.16
Both picture and sound do not oper
ate nor
mally
.
Check the loading switch.
No
Replace the optical pickup unit.
No
No
Are the video signals outputted to the pins of
main unit connector CN801?
CN801 25Pin CVBS
CN801 27Pin C
CN801 29Pin Y
Yes
Check the line between the pins of main unit connector
CN801 and the pins of IC2007.
CN801 25Pin
→
IC2007 5Pin CVBS
CN801 27Pin
→
IC2007 2Pin C
CN801 29Pin
→
IC2007 12Pin Y
FLOW CHART NO.17 (For DV-700S)
Picture do not oper
ate nor
mally
.
Check the main unit.
(IC201, Q202-7 peripheral circuit.)
No
Check the peripheral circuit of Cb/V DRIVE circuit
IC2003 from the pin(4) of IC2007.
No
No
Set the disc on the disc tray.
Yes
Are the video signals shown above input into the
pins of IC2007?
IC2007 5Pin CVBS
IC2007 2Pin C
IC2007 29Pin Y
Yes
Are the video signals outputted to the specific
output terminal?
Are the composite video signals outputted to
the VIDEO OUT terminal (J2001)?
Are the luminance signals outputted to the
S–OUT terminal (J2002)?
Are the chroma signals outputted to the
S–OUT terminal (J2002)?
Check the peripheral circuit of S–YC DRIVE circuit
IC2002 from the pin(14) of IC2007.
Check the peripheral circuit of S–YC DRIVE circuit
IC2002 from the pin(15) of IC2007.
No
Yes
Are the video signal outputted to each pins of
IC2007?
IC2007 4Pin CVBS
IC2007 15Pin S–C
IC2007 14Pin S–Y
Make sure that the level of pins(9), (10) and (11) of
IC2007 is "L" level.
Check or replace IC2007.
Check the V-MUTE line.
Yes
No
Check the main unit.(IC801)
Are the audio signals outputted to the pins of main unit connector CN801?
CN801 1Pin FRONT-L
CN801 3Pin FRONT-R
Yes
Are the audio signals output to the specific
outputted terminals?
No
Are the audio signals outputted to the FRONT–L/R
OUT terminal (J2001)?
No
Check the peripheral circuit of AUDIO AMP. circuit
IC6001 from the pin(1) and (3) of CN801.
FLOW CHART NO.18 (For DV-700S)
Sound do not oper
ate nor
mally
.
Set the disc on the disc tray.
Yes
DV-700S
DV-760S/H
DV-760S/H
10-4
No
No
Are the video signals outputted to the pins of
main unit connector CN801 and CN803?
CN803 5Pin Cb
CN803 7Pin Y
CN803 9Pin Cr
CN801 25Pin CVBS
CN801 27Pin C
CN801 29Pin Y
Yes
Check the line between the pins of main unit connector
CN801 and the pins of IC2007.
CN801 25Pin
→
IC2007 5Pin CVBS
CN801 27Pin
→
IC2007 2Pin C
CN801 29Pin
→
IC2007 12Pin Y
No
FLOW CHART NO.19 (For DV-760S/H)
Picture do not oper
ate nor
mally
.
Check the main unit. (Make sure that the IC201,
Q208-13 and IC205 peripheral circuit and control signal
V-MUTE and RGB CTL lines are on "L" level.)
Check the main unit.
(IC201, Q202-7 peripheral circuit.)
No
Check the peripheral circuit of Cb/V DRIVE circuit
IC2003 from the pin(4) of IC2007.
No
No
No
No
No
Set the disc on the disc tray.
Yes
Are the video signals shown above input into the
pins of IC2007?
IC2007 5Pin CVBS
IC2007 2Pin C
IC2007 29Pin Y
Yes
Are the video signals outputted to the specific
output terminal?
Are the composite video signals outputted to
the VIDEO OUT terminal (J2001)?
Are the luminance signals outputted to the
S–OUT terminal (J2002)?
Are the chroma signals outputted to the
S–OUT terminal (J2002)?
Are the Cb signals outputted to the Cb OUT
terminal (J2001)?
Are the Y signals outputted to the Y–OUT
terminal (J2001)?
Are the Cr signals outputted to the Cr OUT
terminal (J2001)?
Check the peripheral circuit of S–YC DRIVE circuit
IC2002 from the pin(14) of IC2007.
Check the peripheral circuit of S–YC DRIVE circuit
IC2002 from the pin(15) of IC2007.
Check the peripheral circuit of Cb/V DRIVE circuit
IC2003 from the pin(5) of CN803.
Check the peripheral circuit of Cr/Y DRIVE circuit
IC2004 from the pin(7) of CN803.
Check the peripheral circuit of Cr/Y DRIVE circuit
IC2004 from the pin(9) of CN803.
No
Yes
Are the video signal outputted to each pins of
IC2007?
IC2007 4Pin CVBS
IC2007 15Pin S–C
IC2007 14Pin S–Y
Make sure that the level of pins(9), (10) and (11) of
IC2007 is "L" level.
Check or replace IC2007.
Check the V-MUTE line.
Yes
No
Yes
Check the main unit.(IC801-3)
Are the audio signals outputted to the pins of main unit connector CN801?
CN801 1Pin FRONT-L
CN801 3Pin FRONT-R
CN801 5Pin REAR-L
Yes
Are the audio signals output to the specific
outputted terminals?
No
Are the audio signals outputted to the FRONT–L/R
OUT terminal (J2001)?
Are the audio signals outputted to the REAR–L/R
OUT terminal (J2001)?
Are the audio signals outputted to the CENTER/
SUB WOOFER OUT terminal (J2001)?
No
Check the peripheral circuit of AUDIO AMP. circuit
IC6001 from the pins(1) and (3) of CN801.
Check the peripheral circuit of AUDIO AMP. circuit
IC6002 from the pins(5) and (6) of CN801.
Check the peripheral circuit of AUDIO AMP. circuit
IC6002 from the pins(7) and (8) of CN801.
No
No
FLOW CHART NO.20 (For DV-760S/H)
Sound do not oper
ate nor
mally
.
Set the disc on the disc tray.
Yes
CN801 6Pin REAR-R
CN801 7Pin CENTER
CN801 8Pin SUB WOOFER
FLOW CHART NO.21
No
No
Are the video signals output to the pins of main unit
connector CN803?
CN803 11Pin B-OUT, CN803 13Pin G-OUT
CN803 15Pin R-OUT
Yes
Check the line between the pin (11) of CN803 and the pin
(5) of CN2303.
Check the line between the pin (13) of CN803 and the pin
(3) of CN2303.
Check the line between the pin (15) of CN803 and the pin
(1) of CN2303.
Check the line between the pin (14) of IC2007 and the pin
(7) of CN2303.
Check the line between the pin (15) of IC2007 and the pin
(9) of CN2303.
Check the line between the pin (4) of IC2007 and the pin
(11) of CN2303.
Although line output is possib
le
, 21PIN SCAR
T signal does not appear
. (The line output is possib
le)
Check the main unit.
(Make sure that the IC201, Q208-13 and IC205
peripheral circuit and control signal V-MUTE line is "L"
level and RGB CTL line is "H" level.)
No
No
Is specific signal input into the following terminals?
Are the B-OUT signal is input to the pin (5) of
CN2303?
Are the G-OUT signal is input to the pin (3) of
CN2303?
Are the R-OUT signal is input to the pin (1) of
CN2303?
Are the 21P-Y signal is input to the pin (7) of
CN2303?
Are the 21P-C signal is input to the pin (9) of
CN2303?
Are the 21P-CVBS signal is input to the pin (11) of
CN2303?
Yes
When "RGB" is selected with the signal selection
switch (S2001).
(1) Is the B-OUT signal output to the pin (7) of
21PIN SCART terminal (SC2201)?
(2) Is the G-OUT signal output to the pin (11) of
21PIN SCART terminal (SC2201)?
(3) Is the R-OUT signal output to the pin (15) of
21PIN SCART terminal (SC2201)?
(4) Is the VIDEO-OUT signal output to the
pin (19) of 21PIN SCART terminal (SC2201)?
Yes
Yes
When "S-VIDEO" is selected with the signal
selection switch (S2001).
(1) Is the C-OUT signal output to the pin (15) of
21PIN SCART terminal (SC2201)?
(2) Is the Y-OUT signal output to the pin (19) of
21PIN SCART terminal (SC2201)?
Yes
Is the VIDEO-OUT signal output to the pin (19) of
21PIN SCART terminal (SC2201) when the
"VIDEO" is selected with the signal selection
switch (S2001)?
Are the pins (7) and
(12) of IC2302 on "L"
level?
Check the peripheral circuit of B/G DRIVE circuit IC2303,
Q2306 to from the pin (5) of CN2303.
Check the peripheral circuit of B/G DRIVE circuit IC2303,
Q2304 to from the pin (3) of CN2303.
Is the R-OUT signal output to the pin (5) of SCART R/V
DRIVE circuit IC2304?
Yes
Yes
Is the C-OUT signal output to Q2301 and Q2303 of emitter?
Yes
Is the VIDEO-OUT signal output to the pin (4) of SCART
R/V DRIVE circuit IC2304?
Yes
Is the Y-OUT signal output to the pin (4) of SCART R/V
DRIVE circuit IC2304?
Yes
Is the VIDEO OUT signal output to the pin (4) of SCART
R/V DRIVE circuit IC2304?
Yes
No
Check the periphery of Q2305, Q2307, and Q2308.
Check the periphery of Q2301, Q2302, and Q2303.
Check the periphery of SCART R/V DRIVE circuit IC2304.
No
Check the periphery of SCART R/V DRIVE circuit IC2304.
No
Check the periphery of SCART R/V DRIVE circuit IC2304.
No
No
No
No
Is the R-OUTsignal output to the pin (6) of IC2302?
Is the CVBS signal output to the pin (5) of IC2302?
No
No
Is the C-OUT signal output to the pin (6) of IC2302?
Is the 21P-Y signal output to the pin (5) of IC2302?
No
Is the 21P VIDEO-OUT signal output to the pin (5) of
IC2302?
Are the pins (7) and
(12) of IC2302 on "H"
level?
No
Are the pins (7) and (12) of IC2302 on "L level?
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