LG LH-CX640 Series, LH-CX247 Series, LH-CX247, LH-CX640, LH-CX245 Series Service Manual
...
DVD/VCR COMBI RECEIVER
Combi
SERVICE
MODELS
CAUTION
BEFORE SERVICING
IN
THIS MANUAL.
:
LH-CX245(LH-CX245X)/LH-CX246(LH-CX246X)
LH-CX247(LH-CX247X)/LH-CX640(LH-CX640X)
Receiver
THE
UNIT,
READ THE
System
MANUAL
\"SAFETY PRECAUTIONS\"
PROG./
PRESET
LH-CX640(LH-CX640X)LH-CX245(LH-CX245X)
LH-CX247(LH-CX247X)
PROG.
LH-CX246(LH-CX246X)
CONTENTS
SECTION
SECTION
SECTION
SECTION
SECTION
SECTION
1 . . . .
2 . . . .
. . . .
3
4 . . . .
. . ..
5
. . . .
6
SUMMARY
MAIN
CABINET
ELECTRICAL
&
CHASSIS
MECHANISM OF VCR
MECHANISM OF
REPLACEMENT
DVD PART
PARTS LIST
PART
SECTION
SUMMARY
CONTENTS
1
PRODUCTSAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
SERVICINGPRECAUTIONS
\342\200\242
General
\342\200\242
Insulation
\342\200\242
Electrostatically
SERVICE INFORMATION FOR EEPROM IC
SERVICE INFORMATION FOR EEPROM
Servicing
Checking
SPECIFICATIONS
Precautions
Prodedure
Sensitive Devices
......................................................................................................................1-7
..................................................................................................1-4
SETTING(VCR)
(DVD)
...............................................................1-6
.......................................1-5
.............
1-3
1-2
PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS
IMPORTANT SAFETY NOTICE
This manual was
technicians.
When
servicing
be modified or altered without
design
Corporation.
those
must conform to
Special components
ard. These
nent
are allowed without
Circuit
implementation
into the setis not
All
the
original
components
components
original layout
and are
of the latest
in
designators
diagrams may occasionally
CAUTION: Do not
customized installations without manufacturer's
will
fications
user
Service work should be
these
injury.
safety
not
only
checks and
for use
prepared
this
product,
circuit
are also used to
are indicated
required
prior approval
until
delayed
attempt
void the
performed
servicing guidelines.
only by properly
under no circumstances should the
physical
permission
replaced
location,
should be
and their
upon completion
x-radiation,
prevent
the letter
by
to maintain safe
LG Electronics
by
differ from the actual
and
safety
the new service literature is
to
modify
warranty,
performance improvement
this
product
but
may
after
only
you
GRAPHIC SYMBOLS
The exclamation
alert the service
service literature.
The
lightning
is intended to alert the service
angle
noninsulated
tude to constitute a risk of electric shock.
The
pictorial representation
lateral
triangle
following
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK
OF
FIRE,
RATING AS
SERVICE INFORMATION
While
After the
servicing,
use an isolation transformer for
service
original
fuse
REPLACE
MARKED NEAR
problem
within
point
personnel
flash
with
to
arrowhead
\"dangerous voltage\"
ALL
FUSES
has been
of a fuse and its
caution notice:
is intended to
replacement
an
equilateral
important
that
convey
EACH FUSE.
corrected,
lowing:
FIRE AND
1.
Be sure that all
component
from the
2.
that all
Verify
strain
reliefs,
the
per
original design.
has not been defeated.
plug
3.
Soldering
splashes,
ticles.
4.
Check for
for
nents,
replace
5. No lead or
1
at
watt or more. Lead tension around
avoided.
6. After
reassembly
exposed
terminals,
danger
FORMER DURING THIS TEST. Use an AC voltmeter
volt or more
watt
resistor,
known
good
lic
parts,
1500 ohm resistor and .15 mfd
non-polarized adaptor
exposed
This
corresponds
tutes a
potential
HAZARD
SHOCK
components
shorts. This is
repair shop.
protective
power
must be
or
sharp
evidence of
physical
leads or
frayed
if
necessary.
component
of the
metallic
parts
handle and
of electrical shock. DO NOT USE
sensitivity
paralleled
earth
ground
one at a time. Measure the AC
metallic
part.
to 0.5
shock hazard and must be corrected
especially
devices such as
cords,
supply
Be sure that the
inspected
solder
points.
damaged
should touch a
set,
of the cabinet
screws)
in
the
by
water
and
Voltage
milliamp
are
positioned
important
insulators, barriers, covers, shields,
and other hardware have been reinstalled
safety
to discover
Be certain to remove all loose
or deterioration to
damage
insulation
high
protruding
perform
always
(the
to be sure that set is safe to
following
a .15 mfd 150V AC
repeat
manner: Connect a 1500
conduit,
pipe,
capacitor.
AC
measured must not exceed 0.75volts RMS.
AC.
Any
to avoid a
possible
current device or a resistor rated
channel selector
voltage
Reverse the AC
voltage
value
trained audio-video service
from LG Electronics
with
only
of
repairs.
types
wiring
and lead dress
shock and fire haz-
\"x\"
performance.
in
approval.
lead to
are
symbol
personnel
may
to the service
WITH THE
protection
on items
purpose
(including
an AC
ALINE
type
etc.)
across the combination of
measurements for each
exceeding
in
included
Corporation.
any way.
thoroughly
safety
within
their
No deviations
circuit
used. This
printed.
Never
Unauthorized modi-
property damage
familiar
is intended to
triangle
information
an
equilateral
to the
be of sufficient
within
rating
personnel
SAME
from AC line shock.
make a check of the fol-
possibility
trans-ported
of the
polarized
cold solder
metal surfaces must be
and the
joints,
parts
the AC
leakage
knobs,
operate
ISOLATION TRANS-
5000 ohms
having
capacitor
exposed
plug by using
this
immediately.
original
identical to
compo-
way,
changes
perform
with
in
presence
magni-
an
equi-
TYPE AND
of
adjacent
to and
solder
par-
foreign
and
compo-
cord),
test on all
antenna
without
ohm,
between a
metal-
limit
consti-
Good Earth Ground
such as
Conduit,
Pipe,
TIPS ON PROPER INSTALLATION
1.
Never install
shelf
space
2.
Avoid conditions of
or
dew is a
factor,
3. Avoid
placement
should also avoid the use of decorative scarves or other
obstruct ventilation.
might
4.
Wall- and shelf-mounted installations
follow the
the
shelf or
spacers)
tri-
used for fasteners must not touch
of
on customized installations.
5. Caution customers
ed
6.
Aproduct
the
Caution the customer on the hazards of
factory-approved mounting
platform
to
position,
on a roll-about cart should be stable
ers acrossthresholds or
7.
Caution customers
extensions,
to home and
quences
line
and
per
10
a
A.C. Voltmeter
0.15uF
the Water
etc.
receiver
any
or close
over,
high humidity
near steam radiators where steam
where
must retain its
provide adequate
against mounting
unless the receiver is
1500
OHM
WATT
10
in
a closed-in
a heat
to,
duct,
such as: outdoor
draperies
may
using
instructions.
original
air flow across the bottom. Bolts or screws
parts
any
a
product
properly
deep pile carpets.
sprouting
against using
from a
family.
extension cords.
outlet,
single
Place
this
probe
on each
exposed
metal
part.
recess,
or
obstruct
in
cubbyhole,
the
or
of heated air flow.
path
installations where
patio
is a
leakage
The customer
venting.
closely fitting
factor,
coverings
a commercial
feet
(or
or
wiring.
on a
secured.
to roll a cart
trying
can lead to disastrous conse-
Aproduct
the
in
its
mounting
equivalent
Perform
sloping
mounting
Explain
mounted to a
thickness
leakage
shelf or
to the cart.
with
that a forest of
etc.
that
kit
must
tests
in
a
small cast-
in
tilt-
1-3
SERVICING PRECAUTIONS
CAUTION: Before
covered
addends,
NOTE:
the
cautions
by
read and follow the SAFETY PRECAUTIONS.
if
unforeseen circumstances create conflict between
following servicing
in
servicing
this service data and its
this
publications,
cautions.
Remember
General
1.
Servicing
Always
cord from the AC
(1)
(2)
(3)
unplug
Removing
module,
Disconnecting
or other electrical connection.
plug
Connecting
trolytic
Caution:
polarity
in
an
explosion
2.
Do not
spray
COMBI or
3. Unless
specified
First:
Safety
Precautions
the HOME
power
or
reinstalling
or
other
any
or
a test substitute
capacitor.
Awrong
installation of
chemicals on or near this HOME
of its assemblies.
any
otherwise
electricalcontacts
cleaning
cotton-tipped
Unless
of contacts is not
4.
Do not defeat
whitch instruments covered
be
5. Do not
and/or
device heat sinks are
solution to the contacts
swab,
specified
otherwise
required.
any
equipped.
AC
apply
any
power
of its electrical assemblies unless all solid-state
the HOME
precautions
source before:
assembly.
reconnecting
part
electrolytic
hazard.
by
applying
or
comparable
plug/socket
to this HOME
correctly
THEATER
supplements
and
always
THEATER
component,
any
in
substitution or incorrect
in
this service
in
this service
B+
this service manual
by
of the
any
follow the
COMBIAC
internal electrical
any
parallel
capacitors
an
appropriate
with
a
soft
applicator.
data,
voltage
THEATER
circuit
with
pipe
interlocks
installed.
COMBI
safety
safety
power
board,
an elec-
may
THEATER
data,
contact
cleaner,
lubrication
might
COMBI
and
pre-
pre-
result
clean
with
Electrostatically
Some semiconductor
easily by
called
typical
effect transistors and semiconductor
The
static
Electrostatically
ES devices are
following
incidenceof
1.
Immediately
nent or
electrostatic
earth
ground.
available
cially
should be removed for
applying
2.
After
removing
devices,
as aluminum
exposure
3. Use
only
Sensitive
(solid state)
electricity.
Sensitive
integrated
techniques
component
before
semiconductor-equipped
charge
Alternatively,
power
the
place
foil,
of the
a
grounded-tip soldering
should be used to
damage
handling
on
discharging
to the unit under test.
an electrical
assembly
to
prevent
assembly.
Devices
(ES)
devices can be
Such
components
Devices.
(ES)
circuits and some field
chip components.
commonly
help
caused
any
assembly,
your body by
static
by
semiconductor
touching
drain off
obtain and wear a commer-
potential
wrist
shock reasons
assembly
strap
device,
equipped
on aconductive surface such
electrostatic
charge
iron to solder or unsolder
damaged
Examples
reduce the
electricity.
buildup
ESdevices.
4.
Use
solder removal devices not classified as \"anti-static\" can
generate
an anti-static solder removal device. Some
only
electrical
charges
sufficient to
damage
devices.
5. Do not use
generate
freon-propelled
an electrical
charge
chemicals. These can
sufficient to
damage
devices.
6.Do not remove a
tive
package
install
leads
aluminum
it.
electrically
until
(Most replacement
foil,or
replacement
immediately
shorted
comparable
ES devicefrom its
before
ES devices are
together
by
conductive
are
you
packaged
conductive
material).
compo-
a known
which
prior
with
protec-
ready
foam,
are
of
any
to
ES
or
ES
ES
to
with
6.
Always
appropriate
positive
lead last.
Insulation
Disconnect the attachment
the
to the blades of the attachment
connect the test instrument
Always
before
connecting
remove the test instrument
Procedure
from the AC outlet and turn
plug
plug.
ground
lead.
Checking
on. Connectan insulation resistance meter
power
tance betweeneachbladeof the attachment
sibleconductive
ohm.
1:
Note
Input
Accessible Conductive Parts include Metal
terminals,
parts (Note 1)
Earphone
should be more than
jacks,etc.
ground
lead to an
the test instrument
ground
(500V)
The insulation resis-
and acces-
plug
1M-
panels,
7.
Immediately
the leads ofa
material to the chassis or circuit
device
will
before
replacement
be installed.
Caution: Be sure no
and observe all other
circuit,
8. Minimize
replacement
as the
of
your
tricity
bodily
ESdevices.
brushing together
foot from a
sufficient to
1-4
removing
ES
powerisapplied
safety
motions when
(Normally
of
your
carpeted
damage
floor can
an ES
the
device,
protective
assembly
material from
touch the
into which the
to the chassis or
precautions.
handling unpackaged
harmless motion such
clothes fabric or the
generate
device.)
protective
lifting
static elec-
SPECIFICATIONS
General
Power
requirements
Power
consumption
Dimensions
Mass
Operating
Operating
(approx.)
(approx.)
temperature
humidity
Timer
DVD
Section
Laser Semiconductor
system
Signal
Frequency response
Signal-to-noise
Harmonic distortion Less than 1.0%
Dynamic
ratio More than 70 dB
range
Refer to main label
Refer to main label
X
430
5.8
5\313\232Cto 40\313\232C
X
81
kg
5%to90%
24
hours
display tape
PAL/NTSC
DVD(PCM96kHz):8Hzto44kHz
DVD(PCM48kHz):8Hzto20kHz
CD:8Hzto20kHz
Morethan 60 dB
mm
360
(41\313\232Fto95\313\232F)
laser,
(w/h/d)
wavelength
(analog
(DVD, CD)
650
out connectors
nm
only)
Outputs
S-VIDEO OUT
V
1.0
(Y)
V
0.3
(C)
VCR Section
Tape speed
Maximum
Rewind time About 180
Input
recording
level VIDEO:1.0
time SP:
PAL/MESECAM;
NTSC
(Playback only);
11.12
mm/s
4 h
(E-240
AUDIO: -6.0
-6.0
level VIDEO:1.0
Output
Signal-to-noise
ratio VIDEO: Morethan 43 dB
AUDIO: Morethan
More than
Dynamic
Tuner Section
range
Tuning range
Intermediate
Amplifier(LH-CX245/LH-CX247)
frequency
Stereo mode
Surround mode Front: 25W
AUDIO: More than 85 dB
FM:
87.5
AM:
522
FM:
10.7
AM:
450
25W+25W(6ohmat1kHz,THD10%)
Centre: 25W
Surround:25W+25W
Subwoofer:60W
(p-p),
(p-p)
(EP)
min
V(p-p),
V(p-p),
-
108.0
-
1611
MHz
kHz
+
75
ohms,
75 ohms
23.39 mm/s
35.35 mm/s
LP:8h
tape),
(E-180
tape)
75
ohms,
more than 10 kohms
dBm,
more than
dBm,
75
ohms,
72
dB
42
dB
MHz
kHz
25W
(THD 10%)
(6
ohm at 30
(8
negative
(SP),
(E-240
unbalanced
47
unbalanced
(Hi-Fi)
(Mono)
ohm at
kohms
Hz,
sync,
16.69 mm/s
(SP),
tape)
1
kHz,
THD
Mini DIN
16.67 mm/s
(SCART)
(RCA)
THD
10%)
10%)
(LP)
4-pin
x 1
(LP),
Speaker
Section(LH-CX245/LH-CX247)
Satellite
Type
Impedance
Frequency Response
1
Way1Speaker
8\316\251 8\316\251
-
130
Sound Pressure Level 85 dB/W
Rated
Max
Net Dimensions
Net
Power 25W 60W
Input
Power 50W 120W
Input
Weight
(W
x H x
D)
90x138.5x100mm 160x350x345mm
0.9
kg
Speaker
20,000
(1m)
(LHS-CX245T/LHS-CX247T)
Hz
1-7
Passive
1
Way1Speaker
-
50
1,500
82 dB/W
4.5
kg
Speaker
Hz
(1m)
(LHS-CX245W/LHS-CX247W)
Amplifier(LH-CX246)
Stereo mode
25W+25W(6ohmat1kHz,THD10%)
Surround mode Front: 25W
Centre:25W
Surround: 25W
Subwoofer:60W
Speaker
Section(LH-CX246)
Satellite
Type
Impedance
Frequency Response
1
Way1Speaker
8\316\251 8\316\251
-
130
20,000
Sound Pressure Level 85 dB/W
Rated
Max
Net Dimensions
Net
Power 25W 60W
Input
Power 50W 120W
Input
Weight
(W
x H x
D)
89x130x114mm 160x350x333mm
0.54
kg
Amplifier(LH-CX640)
Stereomode
Surround mode Front: 90W
90W+90W(6ohmat1kHz,THD10%)
Centre:90W
Surround: 90W
Subwoofer:150W
Speaker
Section(LH-CX640)
Satellite
(LHS-CX640T) (LHS-CX640C) (LHS-CX640W)
+
25W
Speaker
Hz
(1m)
+
90W
Speaker
(THD10%)
+
25W
ohm at 30
(8
(LHS-CX246T)
(THD10%)
+
90W
ohm at 30
(4
(6
(6
ohm at
ohm at
Hz,
Hz,
1
kHz,
THD
1
kHz,
THD
Centre
THD
10%)
THD
10%)
speaker
10%)
10%)
Passive
1
Way1Speaker
-
50
1,500
82 dB/W
4.5
kg
Speaker
Hz
(1m)
Passive Subwoofer
(LHS-CX246W)
Type
Impedance
Frequency Response
Sound Pressure Level 82 dB/W
Rated
Max
Net Dimensions
Net
\342\200\242
Design
Manufactured under license from
Laboratories. Confidential
\"DTS\" and \"DTS
Power 90W 90W 150W
Input
Power 180W 180W 300W
Input
Weight
and
x H x
(W
specifications
Digital
D)
are
Surround\" are trademarks of
2
Way
6\316\251 6\316\251
120
104x233x120mm 220x114x110mm 195x380x419mm
1.0
kg
to
subject
Dolby
unpublished
2
Speaker
-
20,000
(1m)
change
Laboratories.
works.
Hz
without notice.
\"Dolby\"
Copyright
Digital
2
Way
120
82 dB/W
1.0
and the double-D
1992-1997
Theater
-
kg
2
Speaker
20,000
(1m)
Dolby
Systems,
Hz
symbol
Laboratories.
Inc.
1
Way1Speaker
4\316\251
-
1,500
kg
Hz
(1m)
40
83dB/W
6.6
are trademarks of
All
rights
reserved.
Dolby
1-8
CABINET
SECTION
MAIN
&
CONTENTS
2
CHASSIS
EXPLODED VIEWS
1.
Cabinet
2.
Woofer
3.
Woofer
4.
Woofer
5. Setellite
6. Setellite
7.
Setellite
8.Center
9.
Packing Accessory
and Main Frame
Speaker
Speaker
Speaker
&
Center
&
Center
Speaker
Speaker
.....................................................................................................................2-2
...........................................................................................2-2
.......................................................2-3
..............................................................................2-4
..............................................................................2-5
(LHS-CX245T/LHS-CX247T)
(LHS-CX246T)...............................................................2-7
..................................................................................................2-10
........................................2-6
Section
Section
Section
Speaker
Speaker
Section
Section
(LHS-CX640C).................................................................................2-9
Section
Section
(LHS-CX245W/LHS-CX247W)
(LHS-CX246W)
(LHS-CX640W)
Section
Section
(LHS-CX640T)...............................................................................2-8
2-1
EXPLODED VIEWS
1.
Cabinet
5
4
andMain
Frame Section
OPTIONAL PARTS
3
2
1
A
BCD
2-2
2.
Woofer
Speaker
956
Section
(LHS-CX245W/LHS-CX247W)
959
959
955
957
958
961
952
954
952
951
LOCA. NO.
951 3720RMF085A
952 4766RM0097A
953 3091RMW099A CABINET ASSEMBLY SPK LHS-D6245W STANDARD
954 5208RM0056A DUCT SPK LHS-D6245W OTHER
955 6400WTTJ03A
956 3701RM0104A
957 4766RM0005A
959 353M050C
960 3610RM0046A FOOT SPK LHS-D6245W OTHER FOOT RUBB
961 6871RU9271F
PART
NO. DESCRIPTION SPECIFICATION
PANEL,FRONT
FELT
SPEAKER,WOOFER
NET
ASSEMBLY SPK LHS-D6245W SP-8505
FELT
SCREW,DRAWING
PWB(PCB) ASSEMBLY,SUBSET(AUDIO
2-3
SPK LHS-D6245W MOLD STANDARD
INSIDE 65
F65C-D365TOPTONE WOOFER LHS-6
Audio
BH
LHS-D6230W SUBWOOFER
OUTSIDE
MM,
WF,FE-3500SW,470X7X1T
FBK
3.5X16
85MM,THI
FINE
PAPER PIP
BL
2.5M,
OR
3. Woofer
Speaker
959
Section
956
(LHS-CX246W)
959
955
953
961
952
960
951
LOCA.NO.
951 3720RMF081A
952 4766RM0084A
953 3091RMW094D CABINET ASSEMBLY SPK LHS-D6240W CABINET ASSY
955 6400WTTJ03A
956 4766RM0005A
959 353M050C
960 3610RM0024A FOOT SPK LMS-230/530 OTHER
961 6871RU9271F
PART
NO DESCRIPTION SPECIFICATION REMARKS
PANEL,FRONT
FELT 1T
SPEAKER,WOOFER
FELT
SCREW,DRAWING
PWB(PCB) ASSEMBLY,SUBSET(AUDIO
SPK LHS-D6240W MOLD FRONT
EVA
BLACK
CW-165B40LSAMMI WOOFER LHS-D6
Audio
WF,FE-3500SW,470X7X1T
BH
LHS-D6230W SUBWOOFER
3.5X16
FBK
(EVA)
2.5M,
PANE
BL
PH
OR
2-4
4.
Woofer
Speaker
Section
(LHS-CX640W)
952
954
A900
953
956
955
951
950
S AL LOCA. NO. PART NO. DESCRIPTION SPECIFICATION REMARKS
A900 6401RM0160A SPEAKER ASSEMBLY CW-210B150L-1 SAMMI LHS-C640W
950 5208RM0059A DUCT SPK LHS-T6540W MOLD CHROME
951 3720RMM013A
952 3701RM0110A
953 6400WSMK03A
954 3091RMW107A CABINET ASSEMBLY SPK LHS-T6540W CABINET ASSY
955 4766RM0110A
956 6871RU9251A
957 3610RM0009A FOOT
PANEL,AUDIO
NET
ASSEMBLY SPK LHS-T6540W
SPEAKER,WOOFER
FELT
PWB(PCB) ASSEMBLY,SUBSET(AUDIO
SPK LHS-T6540W MOLD FRONT
NET
ASSY
CW-210B150L-1 SAMMI WOOFER4O
63*115*2T BLACK DUCT
ASSY FE-5000WE ROUND
LXS-330,
EVA(BLACK)
EVA
PHI15X1T,
PLA
(SIL
2P TERMIN
2-5
5. Setellite & Center
Speaker
Section
(LHS-CX245T/LHS-CX247T)
861
850
862
851
852
862
860
854
861
853
LOCA. NO.
850 3701RM0103A
851 6400WTTC04A
852 4930RM0025A HOLDER
PART
NO. DESCRIPTION SPECIFICATION
NET
ASSEMBLY SPK LHS-D6245T SP 8505
SPEAKER,FULLRANGE
F30C-D366-2 TOPTONE WOOFER 6OH
AIR
COVER LH-6230TE
853 3110RMP044A CASE LHS-D6245T MOLD STANDARD
854 6871RU4116B
860 353M025C
861 353M025W
862 353M025V
PWB(PCB) ASSEMBLY,SUBSET(AUDIO
SCREW,DRAWING TAPTITE,
SCREW,DRAWING
SCREW,DRAWING
FE-3620TE
2
+
2
+
2P NEW TERMINAL
FBK
3X10
D3.0 L14.0MSWR3/FZB
D3.0 L6.0MSWR3/FZB
2-6
150M
6. Setellite& Center
Speaker
Section
(LHS-CX246T)
861
854
852
853
860
851
850
LOCA.NO.
850 3701RM0093A
851 6400WTTC04A
852 4930RM0046A HOLDER SPK LHS-D6240T MOLD PREVENTION
853 3110RMP042A CASE LHS-D6240T MOLD
854 6871RU4116B
860 353M025G
861 353M025H
PART
NO DESCRIPTION SPECIFICATION REMARKS
NET
ASSEMBLY SPK LHS-D6240T SP-8505
SPEAKER,WOOFER
PWB(PCB) ASSEMBLY,SUBSET(AUDIO
SCREW,DRAWING TAPTITE,
SCREW,DRAWING TAPTITE,
MSF-80SB20L-1 SAMMI WOOFER 6OH
REAR
CASE
FE-3620TE
2P NEW TERMINAL
FZMY
3X10
FZMY
3X16
150M
2-7
7.
Setellite
Speaker
Section
852
(LHS-CX640T)
A800
855
853
854
851
850
856
857
S AL LOCA. NO. PART NO. DESCRIPTION SPECIFICATION REMARKS
A800 6401RM0158A SPEAKER ASSEMBLY MSF-90SB90L SAMMI LHS-C640T SV
850 3530RMP044A GRILLE LHS-E6740T PRESS
851 3720RMM015A
852 6400DSMX02A
853 6400WSMC05A
854 3110RMP073A CASE LHS-E6740T MOLD
855 6871RU0038A
856 3040RMP037A BASE LHS-E6740T MOLD BOTTOM STAND
857 3610RM0044A FOOT SPK LHS-T6540T/C OTHER
PANEL,AUDIO
SPEAKER,TWEETER
SPEAKER,WOOFER
PWB(PCB) ASSEMBLY,SUBSET(AUDIO
SPK LHS-E6740T/C MOLD FRONT
DT-11ND-1
MSF-90SB90L SAMMI WOOFER 6 OHM
LHS-C640/T6745/E740 STANDARD
SAMMI
BK
0.6T
TWEETER(DOME)
REAR
EVA PHI
2
2-8
8. Center
Speaker
Section
(LHS-CX640C)
A700
755
752
754
753
751
750
756
756
S AL LOCA. NO. PART NO. DESCRIPTION SPECIFICATION REMARKS
A700 6401RM0159A SPEAKER ASSEMBLY MSF-90SB90L SAMMI LHS-C640C SV
750 3530RMP044B GRILLE LHS-E6740C PRESS
751 3720RMM015A
752 6400DSMX02A
753 6400WSMC05A
754 3110RMP072A CASE LHS-E6740C MOLD
755 6871RU0038A
756 3040RMP036A BASE LHS-E6740C MOLD BOTTOM STAND
757 3610RM0044A FOOT SPK LHS-T6540T/C OTHER
PANEL,AUDIO
SPEAKER,TWEETER
SPEAKER,WOOFER
PWB(PCB) ASSEMBLY,SUBSET(AUDIO
SPK LHS-E6740T/C MOLD FRONT
DT-11ND-1
MSF-90SB90L SAMMI WOOFER 6 OHM
LHS-C640/T6745/E740 STANDARD
SAMMI
BK
0.6T
TWEETER(DOME)
REAR
EVA PHI
2
2-9
9.
Packing
Accessory
Section
810
806
822
808
900
CABLE SET
COAXIAL
CABLE,
COAXIAL
CABLE,
BATTERY
REMOCON
ASS'Y,
RF
811
PLUG ASS'Y
812
824
801
INSTRUCTION ASSEMBLY
803A
803B
1WAY(YELLOW)
PLUG ASS'Y
ANTENNA
825
ANTENNA
PACKING,
PACKING,
LOOP(AM)
826
2WAY
(FM)
FILTER
CASING
CASING
804
803
BAG
PACKING
803C
PACKING,
OPTIONAL PARTS
CASING
802
BOX
2-10
SECTION
ELECTRICAL
CONTENTS
OVERALL WIRING DIAGRAM
PART
VCR
ELECTRICAL ADJUSTMENT
PROCEDURES
ELECTRICAL TROUBLESHOOTING
GUIDE
BLOCKDIAGRAMS
CIRCUIT DIAGRAMS
PRINTED
DVD PART
ELECTRICAL TROUBLESHOOTING
GUIDE
............................................................................3-4
1.
POWER(SMPS)
2.
SYSTEM/KEY CIRCUIT..........................................3-6
3. SERVO CIRCUIT ....................................................3-7
4.
Y/C CIRCUIT .........................................................3-10
Hi-Fi
5.
6. TUNER/IF CIRCUIT ..............................................3-17
1.
2.
3.
4.
CIRCUIT.......................................................3-14
POWER(SMPS)
POWER(SMPS)
TU/IF,
VPS BLOCK DIAGRAM .......................................3-24
5. Y/C BLOCKDIAGRAM ........................................3-25
Hi-Fi
6.
7.
1.
2.
3.
4.
5.
6.
7.
8. SYSTEM CIRCUIT DIAGRAM..............................3-45
9.
10.
BLOCK DIAGRAM ......................................3-27
SYSTEM BLOCK DIAGRAM ...............................3-29
POWER(SMPS)
POWER(SMPS)
POWER(SMPS)
TU/IF,
A/V
CIRCUIT DIAGRAM.......................................3-39
HI-FI
CIRCUIT DIAGRAM ....................................3-41
SCART(JACK)
TIMER
TIMER
11.TIMER
\342\200\242
WAVEFORM & VOLTAGE SHEET ........................3-53
\342\200\242
CIRCUIT VOLTAGE CHART ..................................3-55
1. MAIN
2.
KEY(LEFT)
3.
KEY(RIGHT)
4.
SMPSP.C.BOARD ..............................................3-65
..........................................................................3-67
1.
SYSTEM OPERATION FLOW..............................3-67
2.
SYSTEM TEST FLOW..........................................3-68
...........................................................3-3
CIRCUIT.......................................3-4
...............................................3-19
BLOCK DIAGRAM
BLOCKDIAGRAM
NICAM &
NICAM &
CIRCUIT
CIRCUIT
CIRCUIT
CIRCUITDIAGRAMS
P.C.BOARD ................................................3-59
A2
BLOCK DIAGRAM ..............3-23
.............................................3-31
CIRCUIT DIAGRAM
CIRCUITDIAGRAM
CIRCUIT DIAGRAM
A2
CIRCUIT DIAGRAM.............3-37
CIRCUITDIAGRAM ....................3-43
DIAGRAM_0TOOL
DIAGRAM_5TOOL
DIAGRAM_6TOOL..................3-51
P.C.BOARD ......................................3-61
P.C.BOARD.....................................3-63
.............................3-2
1
.................3-19
2
.................3-21
1_200W....3-31
1_400W....3-33
2
...............3-35
...................3-47
/
7TOOL ..3-49
........................3-59
3
2.
SDRAM CLOCK ...................................................3-76
TRAY
3.
4.
5. LENSCONTROL
6. LASER POWER CONTROL
7.
OPEN/CLOSE SIGNAL..............................3-76
SLED CONTROL
DISC
(NO
(NO
CONDITION)........................................3-77
DISC
CONDITION)........................................3-77
SIGNAL(NO
TYPE
DISC
RELATED
RELATED
DISC
CONDITION)
JUDGEMENT WAVEFORM..............3-78
SIGNAL
SIGNAL
RELATED
..........................3-78
8. FOCUSONWAVEFORM .....................................3-80
9. SPINDLE CONTROL WAVEFORM
DISC
(NO
10. TRACKING CONTROL
SIGNAL(SYSTEM CHECKING)
11.
MT1389 AUDIO OPTICAL
OUTPUT(SPDIF)
12.
MT1389 VIDEO OUTPUT WAVEFORM .............3-83
CONDITION)........................................3-81
RELATED
.........................3-82
AND
COAXIAL
.................................................3-83
13. MT1389AUDIO OUTPUT TO AUDIO DAC .......3-84
14.
AUDIO OUTPUT FROM AUDIO DAC................3-85
DVD
15.
BLOCK DIAGRAMS
1.
OVERALL BLOCK
2.
OVERALL BLOCK
AMP
&
WAVEFORMS................................3-86
...............................................3-87
DIAGRAM_200W..................3-87
DIAGRAM_400W..................3-88
3.SERVO BLOCK DIAGRAM..................................3-89
4.
MPEG & MEMORY BLOCK DIAGRAM ...............3-90
5. VIDEO & AUDIO BLOCKDIAGRAM...................3-91
DVD
6.
CIRCUITDIAGRAMS
1.
MPEG CIRCUIT DIAGRAM ..................................3-93
2. RF
3.
AUDIO,
CIRCUIT
4.
DIGITAL
(DVD
5.DIGITAL
(DVD
PWM
6.
(DVD
7.PWM
(DVD
AMP
&
& SERVO CIRCUITDIAGRAM ......................3-95
BLOCK DIAGRAM..........................3-92
.............................................3-93
\316\274_COM
DIAGRAM(DVD
AMP
CIRCUIT DIAGRAM
&
AMP)_200W
AMP
CIRCUIT DIAGRAM
&
AMP)_400W
& CODEIC CIRCUIT DIAGRAM
&
AMP)_200W
& CODEIC CIRCUIT DIAGRAM
&
AMP)_400W
&
.......................3-97
AMP)
............................................3-99
..........................................3-101
..........................................3-103
..........................................3-105
8.INTERFACE CIRCUIT DIAGRAM
&
(DVD
AMP)_200W
9.INTERFACE CIRCUIT DIAGRAM
&
(DVD
\342\200\242
CIRCUIT VOLTAGE
\342\200\242
CIRCUIT VOLTAGE
PRINTED
1.DVD
2. DVD
AMP)_400W
CIRCUIT DIAGRAMS.......................3-119
AMP
&
&
P.C.BOARD_200W
AMP
P.C.BOARD_400W
..........................................3-107
..........................................3-109
CHART_200W
CHART_200W.....................3-115
.....................3-111
........................3-119
........................3-121
DETAILS
1.
AND
SYSTEM
FLASH
TEST
AND
WAVEFORMS ON SYSTEM
DEBUGGING......................................3-74
27MHZ
R/W
CLOCK, RESET,
SIGNAL............................................3-74
3-1
OVERALL WIRING DIAGRAM
12
A-MUTE'H'
11
OUT
10
AMPENA
GND
AMP
CLK
AMPDATAIN
RESET(M-RESET)
CLK(SCKO)
IN(TXDO)
OUT(RXDO)
A.GND
123456789
ENA(M-REC)
Hi-FiBPB
Hi-Fi
REC
Hi-FiAPB
LPAPB
LP
REC
LPRPB
SPBPB
SPREC
123456789
SPAPB
P3D01
FULL
ERASE
12
GND
P3D03
A.PB
A.REC
A/E(-)
A/E(+)
CTL(-)
123456
CTL(+)
P3D02
12
DRUM
CTL
11
DFG/PG
10
L/M
CTL
CAPCTL
12VA(DRUM)
GND
MOTORGND
I-LIMIT
REV'H'
CAP
5.2VA
12VA(CAP)
123456789
CFG
PMC01
AMPDATA
DVD
DVD
PMD01PDM01
DVD
DVDDATA
DVDDATA
12
11
10
123456789
123456789
12
123456
12
11
10
123456789
13
12
11
10
123456789
12
11
10
123456789
PVD04
15
14
13
12
11
10
123456789
RDS-DATA
RDS-CLK
DGND
PLL-D0
PLL-CLK
PLL-DI
PLL-CE
R-OUT
AGND
L-OUT
12VA
STEREO
TUNED
IN
OPTICAL
GND
A-MUTE
1
AMPDATA
0
AMP-DATA
M-RESET
AMP-ENA
AMP-CLK
5.2VA
GND
SPDIF
GND
FD(+)
FD(-)
-29VA
GND
33VA
GND
13VA
GND
3.8VA
3.8VA
GND
5.3VA
5.3VA
GND
GND
PN101PVD04
CN901
PSV01PVS01
13
12
11
10
123456789
12
11
10
123456789
15
14
13
12
11
10
123456789
3-2
IN
1
12345678
VIDEO
GND
F.A.L.IN
GND
F.A.R.IN
GND
KEYRTN
GND
P6603P6602
12345678
1.
Servo
1)
Adjustment
PG
Adjustment
\342\200\242
Test
Equipment
VCR
PART
ELECTRICAL ADJUSTMENT PROCEDURES
OSCILLOSCOPE
a)
\342\200\242
Adjustment
And
MODE
PLAY
\342\200\242
Adjustment
the
Insert
a)
Note
-
Adjust
SP Test
Connect the CH1 of the
b)
c)
Trigger
tance
the
\342\200\242
PG
a-1)
b-2)
the mixed ComboVideo
(time difference),
starting
Adjustment
Payback
Press
it
then
c-3) Repeat
d-4) Stop
\342\200\242
CONNECTION
the
Procedure
SP Test
the
Tape
point
the
SP standard
the
\"OK\"
in
goes
the above
playback,
Specification
MEASUREMENT
V.Out
POINT
H/SW(W373, W374)
and
Tape
distance
of
play.
X,
pressing
the
Tracking(+)
is inserted.
oscilloscope
which
is
of the vertical
Method
tape
on the Remote controller and the \"REC\"
key
to
Tracking
initial mode.
step(No.b-2),
it
then
goes
V.Out
to the
H/SW(W373, W374)
of CH2 to the CH1
Signal
from the
selected
synchronized
it
then
out to PG
finishes
signal,
adjusting
PAL
b)
ADJUSTMENT
or
H/SW(W373, W374),
Head
A(B)
to 6.5H
the PG
adjusting
mode after
MODEL
: PAL
POINT SPECIFICATION
Tracking(-)
and CH2 to the Video
of the
point
\302\261
0.5H
(416\316\274s, 1H=64\316\274s).
on the Front Panel the
key
automatically.
mony
OSCILLOSCOPE
SP TEST
when the
TAPE
\"ATR\"
Out
and then check the
H/SW(W373, W374)
the PG data.
\302\261
6.5
0.5H
blink after the
is
for the VCR.
signal
same
dis-
to
time,
\342\200\242
WAVEFORM
H/SW
H/SW
Composite
VIDEO
CH1CH2
W373
W374
V.outH/SW
(W373, W374)
6.5H(416us)
3-3
ELECTRICAL TROUBLESHOOTING GUIDE
1.
Power(SMPS)
No
(1)
5.3VA(SYS/Hi-Fi/TUNER)
5.3VA.
NO
YES
the F101 normal?
Is
YES
the BD101
Is
normal?
YES
the TH101
Is
normal?
YES
Is
Vcc(12~28V)sup-
to IC104 Pin3?
plied
YES
the D129 nor-
Is
mal?
YES
there about 2.5V
Is
at the IC106Vref?
YES
D127
the
Is
normal?
YES
CIRCUIT
NO
NO
NO
NO
NO
NO
NO
Replace
the same
(Use
Replace
BD101.
Replace
NO
the D105
Is
normal?
NO
Check or
the D105.
NO
Replace
NO
Replace
NO
Replace
the F101.
Fuse)
the
the TH101.
Replace
the D129.
the IC106.
D127.
the
No 5.0VA
(2)
5.0VA.
NO
YES
there about 5.3V
Is
at the
Q168
YES
\"H\"
the
Does
appear
at the
YES
Check or
the
Q162.
No 3.3VA
(3)
3.3VA.
NO
YES
thereabout
Is
at the IC162
YES
Check or
the IC162.
Emitter?
signal
Q162?
Replace
3.8V
Pin1?
Replace
NO
NO
NO
Check or
the D129.
Check the
PWRCTL
Check or
D127.
the
Replace
\316\274-com
'H'
Replace
the D126
Is
normal?
YES
the D125
Is
normal?
YES
D124
the
Is
normal?
YES
Checkthe Main PCB
Power
supply
Line short?
NO
NO
NO
Replace
Replace
Replace
the D126.
the D125.
D124.
the
3-4
12VA
No
(4)
12VA.
NO
YES
thereabout 13V
Is
at the
Q161
YES
Check or
the
Q161.
C?
Replace
NO
Check or
Replace
the D126.
(5)
No 32VA
32VA.
NO
YES
the F101normal?
Is
YES
the BD101
Is
normal?
YES
the TH101
Is
normal?
YES
Is
Vcc(12~23V)sup-
to IC101 Pin3?
plied
YES
D122
the
Is
normal?
NO
NO
NO
NO
NO
Replace
the
(use
Replace
Replace
the
Is
normal?
YES
Checkor
the
D108.
Replace
the F101.
same
Fuse)
the BD101.
the TH101.
D108
Replace
D122.
the
YES
thereabout 2.5V
Is
at the IC103?
YES
Check the Woofer Main PCB
Power
supply
Line
short
or not?
NO
Replace
the IC103.
3-5
2.
SYSTEM/KEY CIRCUIT
AUTO STOP
(1)
Auto
Stop
YES
the
Does
appear
Pin105?
SW25
at the IC501
YES
Do the T-UP Reel
appear
(2)
at the IC501 Pin49?
YES
Replace
The unstable
The
unstable
Cassette
tape
the IC501.
YES
waveform
Pulses
loading
loading
NO
NO NO
of a Cassette
of a
Check the Drum Motor
signal.
Do T/UP Reel
appear
Base
Replace
Sensor
at the
terminal
YES YES
(RS501).
Pulses
Q514
?
the T/UP Reel
tape
Does
5.2V
appear
at the
RS501?
NO
Checkthe Power Circuit.
12V
Is
PMC01
applied
Pin8?
YES
Does
at the IC501 Pin30
inserting
the
signal
CST
\"H\"
the
YES
Does
at the IC501
inserting
YES
the
signal
Pin72
CST?
\"L\"
the
Check the Deck
Mechanism.
:
Caution
Auto
to the
during
?
appear
during
stop
appear
NO
NO
Checkthe
the
peripheral
CST SW
circuitry.
NO
can
occur because Grease or Oil is dried
3-6
and
Check the Power.
5.3V
Is
R544
YES
Refer to
troubleshooting.
applied
?
SMPS
Check the IC501
Pins68, 69, 70,
up
to the
NO
5.3VA
71.
3. SERVO CIRCUIT
UnstableVideo
(1)
Unstable
PB
Mode.
the
Does
screen
Noise
change
periodically?
Do the CTL
at the IC501
the CFG waveform
Does
On
tracking
pulses
the Video
at the IC501
move?
appear
Pin24?
appear
Pin9?
Does
waveform
IC501
in PB
in
Video
YES
levelof the
YES
pulsesappear
Pin8?
YES
YES
do the CTL
YES
Envelope
at the
YES
MODE
NO
NO
NO
Is
adjusting
the
height
the CTLHeadaccurate?
appear
in PB
the IC501.
Y
signal
on the
Mode\".
Replace
Refer to \"When the
doesn't
screen
of
NO
Readjust
CTL Head.
the
height
of the
Replace
When the
(2)
doesn't
the IC501.
run.
When the Drum Motor
doesn't
Does
PMC01
Does 2.8V
PMC01
12V
run,
appear
Pin8?
appear
Pin12?
Check the connector
(PMC01)
Motor
and the Drum
Ass'y.
Drum
at the
YES
YES
Motor
at the
NO
NO
Refer to
No 12VAof Power
Dothe Drum
appear
\"(2)
PWM
at the IC501
section\"
Pulses
Pin107?
YES
Aren't the foil
the
Components
patterns
and
between
IC501Pin107and PMC01
Pin12
short?
Do the DFG
at the IC501 Pin104?
Do the Drum
appear
Pin107?
Aren't the
betweenIC501Pin107and PMC01
Pulses
YES
PWM
at the IC501
YES
connecting
appear
Pulses
patterns
NO
NO
NO
Do the DFG
at the PMC01
YES
Replace
Aren't the foil
the
Components
IC501 Pin104and PMC01
Pin11
short?
Replace
and the
Components
Pin12
short?
Pulses
appear
Pin11?
NO
the
Cap
patterns
between
the IC501.
M.
and
3-7
When the
(3)
Capstan
Motor doesn't
run,
When the
Does
Capstan
12VAappear
Does2.8V
Check the PMC01 and the
Motor
Ass'y.
Aren't the foil
between IC501
Pin9
short?
patterns
Motor
appear
Pin108
doesn't
at the PMC01?
YES
at the PMC01?
YES
Capstan
and
Components
and PMC01
run,
NO
NO
YES
Refer to
Trouble
Does
IC501
Does
PMC01
\"SMPS(CAPSTAN/12Volt)
Shooting\".
PWM
the
signal
appear
Pin108?
NO
the CFG
Pin1?
signal
appear
at the
at the
YES
NO
the CFG
Does
IC501 Pin9?
the
Does
the IC501
Capstan
Pin108?
Aren't the foil
between IC501
Pin9
short?
patterns
signal
PWM
Pin108
come into the
YES
signal
YES
and
Components
and PMC01
appear
Check the
NO
at
NO
Aren't the foil
between IC501Pin9 and PMC01
Pin1
short?
Capstan
patterns
Replace
Motor
and
component
the IC501.
Ass'y.
3-8
(4)
KEY
KEY
doesn't
doesn't
working
working.
5V
Is
applied
to the IC501
Pin36?
YES
LED
Does
when a function button
pressed?
FLD
or
change
NO
NO
is
Refer to
Trouble
Replace
switches.
\"SMPS
5.3VA
Shooting\".
the defective
3-9
4.
Y/C CIRCUIT
(1)
Does
appear
No Video
No Video
theVideo
at the IC301
in EE
in EE
signal
YES
Is
5V
applied
to the IC301
Pins18, 24, 42,55,72,
YES
the Video
Does
appear
at the IC301Pin65?
signal
YES
Mode,
Mode
Pin48?
91?
NO
NO
NO
Check the
Check the
Line.
(Power Circuit)
I2C
Is
BUS
the IC301
24Pin
5.2VT,
signal
Pins68,
YES
of Tuner.
5.3VA
applied
69?
NO
to
Check the
(Refer
CHECK Trouble
System
to
'SYSTEM
Circuit.
I2C
Shooting')
BUS
Does
appear
Does
appear
nal of the
the Video
signal
at the IC501Pin19?
YES
the Video
at the Emitter termi-
Q307,
signal
Q308?
NO
NO
Chck the
path
of the
betweenthe IC301Pin65
and IC501
Does
appear
nal of the
Replace
Pin17.
the
at the Emitter termi-
12VT,
Q804,
the
Q804,
5.3VA
Q308.
YES
Q308.
signal
NO
Check C316.
Replace
Check the
Line.
(PowerCircuit)
(AGC)
YES
the IC301.
5.3VA
12VT,
3-10
(2)
When the
Y(Luminance)
signal
doesn't
appear
on the screen
in PB
Mode,
Is
5.2VT,
5.3VAapplied
IC301
Pins24, 42, 55, 72,
the I2C
Is
Bus
to the IC301
the normal
Does
appear
at the IC301
YES
siganl
Pins68,
YES
RF
YES
to the
91?
applied
?
69
signal
Pin78?
NO
NO
NO
Checkthe line of the
5.3VALine.
Refer to
CHECK Trouble
the
Is
applied
IsV.H.S/W
at the IC301Pin70?
(PowerCircuit)
'SYSTEM
V.H.S/W
to the IC301 Pin70?
signal
YES
\"H\"
about 3.4V
YES
Cleanthe Drum.
5.2VT,
I2C
BUS
Shooting'.
NO
NO
NO
Check the
System
(IC501 Pin105)
Checkthe
(Check
Replace
V.H.S/W
R303,
the IC301.
Circuit.
level.
R304)
the
Does
signal
appear
Y(Luminance)
at the IC301
Pin76?
the
Is
Y(Luminance)
waveform
theIC301 Pin43?
showed
Replace
the IC301.
YES
YES
up
Video
at
RF
NO
NO
Check the
Y(Luminance)
(Check
Check the
the
path
C312)
path
Y(Luminance)
(Check C327)
of the
RF
of the
RF
signal.
YES
YES
signal.
3-11
When the
(3)
C(Color)
signal
doesn't
appear
onthescreen
in PB
Mode,
Is
5.2VT/5.3VAapplied
IC301
Pins24, 42, 55, 72,
the Color
Is
applied
to the IC301
Pin70?
Color
Is
about 3.4V?
the Color
Does
appear
Pin25
at the IC301
?
Rotary
Rotary
YES
YES
YES
YES
to the
signal
\"H\"
signal
91.
NO
NO
NO
NO
Does
oscillate?
Does
appear
the
X301(4.43MHZ)
the Color
at the IC301
Checkthe line of the 5.2VT/
5.3VALine.
Check the Color
Circuit.
(Power Circuit)
(IC501
Checkthe Color
signal
level.
Pin21?
(Check
the
NO
NO
Rotary
Pin99
)
Rotary
R303)
Replace
Checkthe Color
the X301.
Pass.
Replace
the IC301.
Replace
YES
the IC301.
3-12
When the Video
(4)
signal
doesn't
appear
on the screen
in
REC
Mode,
EE
the
Is
Is
5.2VT/5.3VAapplied
IC301
Pins24,42,55,72,91?
PB
Does
normally?
RF
the
Does
at the IC301
signal
YES
YES
Mdoe
YES
signal
Pin78?
YES
normal?
to the
operate
appear
NO
NO
NO
NO
Check
EE
Mode.
Checkthe line of the 5.2VT/
5.3VALine.(Power Circuit)
Check
the REC
Is
(about 4V) applied
IC301
PB
'H'
Pin80?
YES
Mode.
signal
to the
CheckREC Luminance
& Color
Pass
Pass.
NO
YES
Check the
'H'.
(the
/
the
D301)
Replace
System
IC501
the IC301.
of REC
Pin47
the REC
Does
appear
Pins88,89,94,95?
at the IC301
YES
Check the Drum &
Drum Connector
RF
signal
NO
Checkthe circuit of the
IC301
Pins85,
86.
YES
3-13
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