MX-G950V/MX-G880V
MX-G950V/MX-G880V
MX-G850V/MX-G750V
MX-G850V/MX-G750V
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MX-G950V/MX-G880V
MX-G850V/MX-G750V
CA-MXG950V
COMPACT
DIGITAL VIDEO
COMPACT
DIGITAL AUDIO
MX-G950V/MX-G850V
U-----------------Other Areas
UN----------------------- Asean
UX---------------Saudi Arabia
Contents
Safety precautions
Preventing static electricity
Important for laser products
Disassembly method
Adjustment method
CA-MXG850V
CA-MXG880V
MX-G880V
Area Suffix
UN----------------------- Asean
1-2
1-3
1-4
1-5
1-28
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
Flow of functional operation
until TOC read (CD)
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
Area Suffix
CA-MXG750V
MX-G750V
Area Suffix
UN----------------------- Asean
US ----------------- Singapore
UX---------------Saudi Arabia
1-33
1-34
1-34
1-35~56
No.21099
Jul. 2002
1-1
MX-G950V/MX-G880V
MX-G850V/MX-G750V
1. This design of this product contains special hardware and many circuits and components specially for safety
purposes. For continued protection, no changes should be made to the original design unless authorized in
writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services
should be performed by qualified personnel only.
2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product
should not be made. Any design alterations or additions will void the manufacturer`s warranty and will further
relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.
3. Many electrical and mechanical parts in the products have special safety-related characteristics. These
characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily
be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in the Parts List of Service Manual. Electrical
components having such features are identified by shading on the schematics and by ( ) on the Parts List in
the Service Manual. The use of a substitute replacement which does not have the same safety characteristics
as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or
other hazards.
4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be
separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of
electric shock and fire hazard. When service is required, the original lead routing and dress should be
observed, and it should be confirmed that they have been returned to normal, after re-assembling.
5. Leakage currnet check (Electrical shock hazard testing)
After re-assembling the product, always perform an isolation check on the exposed metal parts of the product
(antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the
product is safe to operate without danger of electrical shock.
Do not use a line isolation transformer during this check.
Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage
current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return
path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more
sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor
between an exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal part,
particularly any exposed metal part having a return path to
the chassis, and meausre the AC voltage across the resistor.
Now, reverse the plug in the AC outlet and repeat each
measurement. Voltage measured any must not exceed 0.75 V
AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).
0.15 F AC TYPE
1500 10W
Good earth ground
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
Place this
probe on
each exposed
metal part.
!
1. This equipment has been designed and manufactured to meet international safety standards.
2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
3. Repairs must be made in accordance with the relevant safety standards.
4. It is essential that safety critical components are replaced by approved parts.
5. If mains voltage selector is provided, check setting for local voltage.
Burrs formed during molding may
be left over on some parts of the
chassis. Therefore, pay attention to
such burrs in the case of
preforming repair of this system.
In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the
parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " "
mark nearby are critical for safety.
(This regulation does not correspond to J and C version.)
1-2
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Preventing static electricity
1. Grounding to prevent damage by static electricity
Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,
can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.
2. About the earth processing for the destruction prevention by static electricity
In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity of
the work environment.
Be careful to use proper grounding in the area where repairs are being performed.
2-1 Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over
it before placing the traverse unit (optical pickup) on it.
2-2 Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(caption)
Anti-static wrist strap
Conductive material
(conductive sheet) or iron plate
3. Handling the optical pickup
1. In order to maintain quality during transport and before installation, both sides of the laser diode on the
replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)
2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power
source can easily destroy the laser diode.
4. Handling the traverse unit (optical pickup)
1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific
details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse
unit. Be careful not to take too long a time when attaching it to the connector.
3. Handle the flexible cable carefully as it may break when subjected to strong force.
4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it
Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for pick-up and how to
detach the CD traverse mechanism.
1. Remove the disk stopper and T. bracket on the CD changer mechanism
assembly.
2. Disconnect the harness from connector on the CD motor board.
3. CD traverse unit is put up as shown in Fig.1.
4. Solder is put up before the card wire is removed from connector CN601
on the CD servo control board as shown in Fig. 2.
(When the wire is removed without putting up solder, the CD pick-up
assembly might destroy.)
5. Please remove solder after connecting the card wire with CN601 when
you install picking up in the substrate.
CD changer
mechanism
assembly
CD traverse
unit
Flexible cable
Fig.1
Soldering
Fig.2
1-3
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The compact disc player uses invisible laser
radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. It is
dangerous to defeat the safety switches.
VARNING : Osynlig laserstrålning är denna del är öppnad
och spårren är urkopplad. Betrakta ej strålen.
VARO : Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle lasersäteilylle.Älä katso
säteeseen.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
CAUTION
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
ADVARSEL : Usynlig laserstråling ved åbning , når
sikkerhedsafbrydere er ude af funktion. Undgå
udsættelse for stråling.
ADVARSEL : Usynlig laserstråling ved åpning,når
sikkerhetsbryteren er avslott. unngå utsettelse
for stråling.
REPRODUCTION AND POSITION OF LABELS
WARNING LABEL
CLASS 1
LASER PRODUCT
1-4
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Disassembly method
<Main body>
Removing the metal cover
(See Fig.1 ~ 3)
1.
Remove the six screws A on the back of the body.
2.
Remove the two screws B on both sides of the
body.
3.
Remove the metal cover from the body by lifting the
rear part of the cover.
CAUTION:
Do not break the front panel tab fitted to
the metal cover.
A
Metal cover
A
(CA-MXG850VU, CA-MXG950VUX)
A
Fig.1
Metal cover
A
Metal cover
B
Fig.2
A
A
Fig.1
(CA-MXG750VUS)
Metal cover
B
Fig.3
1-5
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the CD changer mechanism
assembly (See Fig.4, 6)
Prior to performing the following procedure, remove
the metal cover.
1.
Disconnect the wire from connector CN705 on the
amplifier board.
2.
Remove the plastic rivet attaching the main board to
the front assembly on the right side of the body.
3.
Disconnect the card wire from connector CN661 on
the main board.
4.
Remove the two screws C on the upper side of the
body and the two screws D on the back of the rear
panel.
5.
Pull both the rear panel and the front panel assembly
to the outside, then remove the CD changer
mechanism assembly by lifting the rear part of the
assembly.
CD changer mechanism assembly
Rear panel
Amplifier board
CN705
Fig.4
Front panel assembly
C
Main board
CN661
Front panel assembly
C
CD changer
mechanism assembly
REFERENCE:
At this point, one card wire on the
underside of the CD mechanism
assembly is still connected.
6.
Disconnect the card wire from connector CN504 on
the inner side of the main board on the right side of
the body. Remove the CD mechanism assembly.
CAUTION:
To prevent damage to the CD fitting, be
sure to pull both the rear panel and the
front panel assembly enough to remove
the CD changer mechanism assembly.
CN504
Fig.5
CD changer mechanism assembly
Plastic rivet
Main board
CN661
CN504
Front panel assembly
Fig.6
(CA-MXG850VU, CA-MXG950VUX)
CD changer mechanism assembly
Rear panel
Rear panel
D
Rear panel
1-6
Plastic rivet
Main board
CN661
CN504
Front panel assembly
D
Fig.6
(CA-MXG750VUS)
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the fan (See Fig.7)
Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.
1.
Turn over the CD changer mechanism assembly and
remove the two screws E attaching the fan.
Removing the front panel assembly
(See Fig.8 ~ 11)
Prior to performing the following procedure, remove
the metal cover and CD changer mechanism
assembly.
1.
Disconnect the card wires from connector CN870,
CN871 and CN315 on the main board respectively.
Amplifier board
CN703
Fan
E
CD changer mechanism assembly
Fig.7
Band
Main board
CN870
E
CN871
CN315
2.
Remove the band and disconnect the wire from
connector CN703 on the amplifier board.
3.
Disconnect the wire from connector CN220 on the
transformer board.
4.
Remove the two screws F on the bottom of the
body.
5.
Release the two joints a on the lower right and left
sides of the body using a screwdriver, and remove
the front panel assembly toward the front.
Transformer board
CN220
Fig.8
(Bottom)
Fig.9
Front panel
assembly
F
Front panel assembly
Fig.10
Joint a
Joint a
Front panel assembly
Fig.11
1-7
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the tuner board
(See Fig.12)
Prior to performing the following procedure, remove
the metal cover.
1.
Disconnect the card wire from connector CN1 on the
tuner board on the right side of the body.
2.
Remove the plastic rivet fixing the tuner board.
3.
Remove the two screws G on the back of the body.
Removing the rear cover / rear panel
(See Fig.13 ~ 16)
Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.
1.
Remove the screw H attaching the rear cover on the
back of the body.
2.
Push each tab of the four joints b in the direction of
the arrow and release.
3.
Remove the sixteen screws G attaching the rear
panel.
4.
Disengage the joints c on each lower side of the rear
panel using a screwdriver and remove the rear panel
backward.
Plastic rivet
G
Joint b
Rear cover
(CA-MXG850VU, CA-MXG950VUX)
G
CN1
Tuner board
Fig.12
H
Fig.13
H
Rear panel
G
Rear panel
Joint b
Rear panel
Rear panel
G
G
G
Fig.14
(CA-MXG850VU, CA-MXG950VUX)
Rear panel
Fig.15
Joint c
G
G
Joint b
Rear cover
G
G
G
Joint b
Fig.13
(CA-MXG750VUS)
Rear panel
G
G
Fig.14
(CA-MXG750VUS)
1-8
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Joint c
Rear panel
Fig.16
(CA-MXG850VU, CA-MXG950VUX)
Removing the main board
(See Fig.17 ~ 19)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly, the rear panel and the tuner board.
1.
Disconnect the card wires from connector CN870,
CN871 and CN315 on the main board.
2.
Disconnect the wires from connector CN704 and
CN706 on the amplifier board.
3.
Remove the screw I attaching the main board on
the right side of the body.
4.
Disconnect the wire from connector CN710 on the
speaker board.
CN315
Amplifier board
CN704
CN706
Main board
Joint c
Fig.16
(CA-MXG750VUS)
Main board
CN870
CN871
Fig.17
Rear panel
Front panel assembly
Amplifier board
CN704, CN706
5.
Disconnect connector CN211 and CN212 on the
main board from the regulator board.
Front panel assembly
Main board
Regulator board
I
CN212
CN211
Fig.19
Speaker board
CN710
Fig.18
(CA-MXG850VU, CA-MXG950VUX)
Amplifier board
CN704, CN706
Main board
Speaker board
CN710
Fig.18
(CA-MXG750VUS)
1-9
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the speaker board
(See Fig.20)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
REFERENCE:
1.
Disconnect the wire from connector CN710 on the
speaker board.
2.
Disconnect connector CN217 on the speaker board
from the regulator board.
It is not necessary to remove the main
board.
Speaker board
CN701
Regulator board
CN217
Fig.20
(CA-MXG850VU, CA-MXG950VUX)
Speaker board
CN710
Removing the power board (See Fig.21)
Prior to performing the following procedure, remove
the metal cover, the CD changermechanism
assembly and the rear panel.
1.
Remove a band on the power board.
2.
Disconnect the wire from connector CN218, CN219
and CN250 on the power board.
3.
Disconnect connector CN213 on the power board
from the regulator board.
Regulator board
Power board
CN219
CN250
CN213
Fig.20
CN217
(CA-MXG750VUS)
CN218
Band
Fig.21
1-10
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the amplifier board / voltage
board / heat sink (See Fig.22, 23)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
1.
Disconnect the wires from connector CN703, CN704
and CN706 on the amplifier board respectively.
2.
Remove the two band attaching the wire to the
amplifier board and the voltage board.
3.
Disconnect connector CN215 on the amplifier board
and CN216 on the voltage board from the regulator
board (The heat sink will be detached at once).
4.
Remove the four screws J attaching the amplifier
board to the heat sink.
5.
Remove the two screws K, the board bracket and
the voltage board.
REFERENCE:
It is not necessary to remove the power
board.
Voltage board
Regulator board
Heat sink
Voltage board
Amplifier board
CN704
CN706
Band
CN216
Fig.22
Band
CN703
CN215
Amplifier board
J
K
CA-MXG850VU, CA-MXG950VUX)
Heat sink
Voltage board
J
Board bracket
Fig.23
Amplifier board
J
J
K
Board bracket
Fig.23
(CA-MXG750VUS)
1-11
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the power transformer
assembly (See Fig.24, 25)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
1.
Disconnect the wires from connector CN218 and
CN219 on the power board.
2.
Disconnect the wire from connector CN204 on the
regulator board.
3.
Disconnect the wire from connector CN220 on the
transformer board.
4.
Remove a band on the voltage board.
5.
Release the wire from the stopper on the regulator
board.
6.
Remove the four screws L attaching the transformer
assembly.
Power board
CN219
CN218
Band
L
Transformer board
CN220
Power transformer assembly
Fig.24
Stopper
Regulator board
CN204
L
Removing the regulator board
(See Fig.26)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly, the rear panel, the antenna board, the
main board, the amplifier board, the voltage board,
the power board and the speaker board.
1.
Disconnect the wire from connector CN204 on the
regulator board.
2.
Release the wire from the stopper on the regulator
board.
3.
Remove the two screws M attaching the reglator
board.
Removing the power cord (See Fig.27)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
1.
Disconnect the wire from connector CN250 on the
power board.
Power transformer
assembly
M
Power transformer assembly
Power board
CN250
Power cord stopper
Fig.25
Fig.26
Regulator board
CN204
Stopper
M
Regulator board
CN204
2.
Remove the band from the power board.
3.
Move the power cord stopper upward and pull out it
from the base chassis.
1-12
Base chassis
Band
Fig.27
MX-G950V/MX-G880V
MX-G850V/MX-G750V
<Front panel assembly>
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the front panel assembly.
Removing the cassette mechanism
assembly (See Fig.28)
1.
Disconnect the card wire from connector CN306 on
the head amplifier & mechanism control board.
2.
Remove the seven screws N attaching the cassette
mechanism assembly.
Removing the display system control
board (See Fig.29 ~ 31)
1.
Remove the four screws O attaching the stay
bracket.
2.
Disconnect the card wires from connector CN316
and CN880 on the display system control board.
Head amplifier
& mechanismcontrol board
CN306
N
Cassette mechanism
assembly
N
N
N
Fig.28
O
3.
Remove the seven screws P attaching the display
system control board.
4.
If necessary, disconnect the wire from connector
CN911 on the front side of the display system control
board and unsolder FW915.
Removing the CD eject board
(See Fig.31, 32)
1.
Remove the three screws Q attaching the CD eject
board.
2.
If necessary, unsolder FW915 on the CD eject
board.
CD eject board
CN911
FW915
FW915
Display system control board
CN316
P
FW915
(Solding)
P
CN880
CD eject board
FW915
(Solding)
Q
P
Q
Stay bracket
Fig.29
CN911
P
P
Display system control board
Fig.30
Display system control board
Fig.31
Fig.32
1-13
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the preset / tuning switch
board (See Fig.33, 34)
Prior to performing the following procedure, remove
the display system control board.
1.
Pull out the preset knob on the front panel.
2.
Remove the four screws R attaching the preset /
tuning switch board.
3.
If necessary, unsolder FW901 on the preset / tuning
switch board.
Removing the operation switch board
(See Fig.34, 35)
Prior to performing the following procedure, remove
the display system control board and the preset /
tuning switch board.
1.
Pull out the volume knob on the front panel and
remove the nut. Pull out the sound mode knob, the
mic level knob and the sub woofer level knob toward
the front.
R
Preset / tuning switch board
FW901
(Solding)
Preset knob
R
Fig.33
Sound mode knob
Sub woofer
level knob
2.
Remove the twelve screws S attaching the
operation switch board.
3.
Release each tab of the seven joints g retaining the
operation switch board.
Joint g
Joint g
S
S
Volume knob
Joint g
Mic level knob
Nut
Fig.33
S
Operation
switch board
1-14
S
Joint g
S
Fig.35
S
S
Joint g
Disassembly method
MX-G950V/MX-G880V
MX-G850V/MX-G750V
<speaker section>
Removing the front cover (See Fig.1,2)
CAUTION:
1.
Remove the four screws A on the front of the body
respectively.
2.
Remove the front cover toward the front and
disconnect the yellow and black wires from the two
tweeter speaker terminals.
Do not break or damage the front panel and
body that are glued at the joints a.
(See Fig.1)
A
Joint a
Joint a Joint a
Front cover
Joint a
A
Fig.1
(SP-MXG750V)
(SP-MXG850V)
(SP-MXG950V)
Tweeter speaker
Woofer speaker
(SP-MXG750V)
(SP-MXG850V)
(SP-MXG950V)
Fig.2
1-15
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the woofer speaker (See Fig.3)
Prior to performing the following procedure, remove
the front cover.
1.
Remove the four screws B on the front of the body.
2.
Pull out the woofer speaker toward the front and
disconnect the wire (yellow and black,red and black)
from the two speaker terminals.
B
B
Removing the tweeter speaker
(See Fig.4)
Prior to performing the following procedure, remove
the front cover.
1.
Disconnect the red and black wires from the two
tweeter speaker terminals.
2.
Remove the two screws C attaching the tweeter
speaker on the back of the front cover.
Woofer speaker
Fig.3
(SP-MXG750V)
(SP-MXG850V)
(SP-MXG950V)
C
Tweeter speaker
1-16
Front cover
Fig.4
(SP-MXG750V)
(SP-MXG850V)
(SP-MXG950V)
<Woofer speaker section>
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the front cover (See Fig.5)
CAUTION:
1.
Remove the four screws D on the front of the body
respectively.
2.
Remove the front cover toward the front.
Do not break or damage the front panel and
body that are glued at the joints b.
(See Fig.5)
Joint b
Joint b Joint b
Front cover
Joint b
DD
Removing the woofer speaker (See Fig.6)
Prior to performing the following procedure, remove
the front cover.
1.
Remove the four screws E on the front of the body.
2.
Pull out the woofer speaker toward the front and
disconnect the red and black wires from the two
speaker terminals.
Fig.5
(SP-MXG850V)
(SP-MXG950V)
Woofer speaker
EE
Fig.6
(SP-MXG850V)
(SP-MXG950V)
1-17
MX-G950V/MX-G880V
MX-G850V/MX-G750V
<Removing the Rear speaker>
Removing the Rear cover (See Fig.7 ~ 9 )
1.
Remove the four screws F on the back of the body.
2.
Disconnect the wires from the two terminals on the
rear speaker.
3.
Remove the four screws G on the back of the front
cover.
F
Rear cover
F
Fig.7(SP-MXG950V)
Rear cover
Front cover
Rear speaker
Fig.8(SP-MXG950V)
terminals
Rear speaker
Front cover
1-18
G
Rear speaker
Fig.9(SP-MXG950V)
terminals
G
Removing the CD Servo control board
(See Fig.1)
1.Remove the metal cover.
2.Remove the CD changer mechanism assembly.
3.From bottom side the CD changer mechanism assembly,
remove the four screws A retaining the CD servo control
board.
4.Absorb the four soldered positions "a" of the right and
left motors with a soldering absorber.
5.Pull out the earth wire on the CD changer mechanism
assembly.
6.Disconnect the connector CN854 on the CD servo
control board.
7.Disconnect the card wire CN601 and the connector
CN801 on the CD servo control board.
MX-G950V/MX-G880V
MX-G850V/MX-G750V
A
a
a
CN854
A
CN651
CD servo control board
CN652
CN801
CN601
CN151
Removing the CD tray assembly
(See Fig.2~4)
Remove the front panel assembly.
1.
Remove the CD changer mechanism assembly.
2.
Remove the CD Servo control board.
3.
Remove the screw B' retaining the lod stopper.
4.
From the T.bracket section "b" and clamper base
5.
section "c" , remove both of the edges fixing the
rod(See Fig.2 and 3).
Remove the screw B retaining the disc stopper
6.
(See Fig.3).
Remove the three screws C retaining the T.bracket
7.
(See Fig.3).
Remove the screw D retaining the clamper assembly
8.
(See Fig.3).
From the left side face of the chassis assembly, remove
9.
the one screw E retaining both of the return spring and
lock lever(See Fig. 4).
10.
By removing the pawl at the section "d" fixing the return
spring, dismount the return spring(See Fig.4).
11.
Remove the three lock levers(See Fig.4).
T.Braket
Disc stopper
B
Earth
wire
Fig.1
A
Clamper base
A
b
Rod
c
T.Braket
Fig.2
d
CC
B'
a
Lod stopper
(C/J version only)
C
D
b
Lock lever
Clamper ass'y
Fig.3
Fig.4
Return spring
E
1-19
MX-G950V/MX-G880V
MX-G850V/MX-G750V
11.
Check whether the lifter unit stopper has been caught
into the hole at the section "e" of CD tray assembly as
shown in Fig.5.
Make sure that the driver unit elevator is positioned as
12.
shown in Fig.6 from to the second or fifth hole on the
left side face of the CD changer mechanism assembly.
[Caution]
13.
14.
15.
Chassis assembly
In case the driver unit elevator is not at above
position, set the elevator to the position as
shown in Fig.7 by manually turning the pulley
gear as shown in Fig.8.
Manually turn the motor pulley in the clockwise
direction until the lifter unit stopper is lowered from the
section "e" of CD tray assembly(See Fig.8).
Pull out all of the three stages of CD tray assembly in
the arrow direction "f" until these stages stop
(See Fig.6).
At the position where the CD tray assembly has
stopped, pull out the CD tray assembly while pressing
the two pawls "g and g' " on the back side of CD tray
assembly(See Fig.9). In this case, it is easy to pull out
the assembly when it is pulled out first from the stage
CD tray assembly.
Stopper
e
CD tray
assembly
Fig.5
Refer to Fig.7
Pulley gear
Pawl
Fig.6
CD tray assembly
g
CD
CD
CD
f
Drive unit of elevator
Fig.7
3
2
1
CD tray assembly
1-20
Motor pulley
Fig.8
Pawl ,
g
Fig.9
g'
Removing the CD loading mechanism
assembly(See Fig.10)
1.2.While turning the cams R1 and R2 assembly in the
arrow direction "h" ,align the shaft "i" of the CD loading
mechanism assembly to the position shown in Fig.10.
Remove the four screws F retaining the CD loading
mechanism assembly.
Removing the CD traverse mechanism
(See Fig.11 and 12 )
For dismounting only the CD traverse mechanism
1.
without removing the CD loading mechanism assembly,
align the shaft "j" of the CD loading mechanism
assembly to the position shown Fig.11 while turning the
cam R1 and R2 assembly in the arrow direction "k" .
By raising the CD loading mechanism assembly in the
2.
arrow direction "l", remove the assembly from the lifter
unit
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Cams R1, R2 assembly
Arrow
h
i
F
F
Cam R1, R2 assembly
j
Fig.11
Arrow
F
CD loading mechanism assembly
F
Fig.10
CD traverse mechanism
k
Lifter unit
Fig.12
CD Pickup unit
Arrow
l
Removing the CD pick unit
(See Fig.13 )
1.
Move the cam gear in the arrow direction "m" . Then,
the CD pickup unit will be moved in the arrow direction
"n" .
According to the above step, shift the CD pickup unit to
2.
the center position.
While pressing the stopper retaining the shaft in the
3.
arrow direction "o" , pull out the shaft in the arrow
direction "p".
After dismounting the shaft from the CD pickup unit,
4.
remove the CD pickup unit
o
Shaft
Stopper
p
Fig.13
Shaft
n
m
Stopper
CD loading
mechanism
Shaft
Cam gear
1-21
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the try select switch board
(See Fig.14)
1.2.Remove the two screws G retaining the tray select
switch board.
Disconnect the tray select switch board from connector
CN804 on the CD servo control board.
Removing the cam unit
(See Fig.15 ~17 )
1.
Remove the CD loading mechanism assembly.
2.
While turning the cam gear "q", align the Paul "r"
position of the drive unit to the notch position(Fig.16) on
the cam gear "q".
Pull out the drive unit and cylinder gear(See Fig.17).
3.
While turning the cam gear "q", align the Paul "s"
4.
position of the select lever to the notch position(Fig.18)
on the cam gear "q".
Remove the four screws H retaining the cam unit(cam
5.
gear "q" and cams R1/R2 assembly)(See Fig.18).
Chassis assembly
Drive unit
CN851
CN854
Fig.14
Cam gear
Tray select
switch board
CN804
q
G
Drive unit
Cylinder gear
r
Cam gear
H
s
Fig.15
H
q
Cams R1, R2 assembly
Cam unit
J
1-22
Fig.16
Select lever
Fig.17
MX-G950V/MX-G880V
Fig.18
Fig.20
Fig.19
Fig.21
[Note]
When the chassis assembly is turned over under
the conditions wherein the gear bracket and belt
have been removed, then the pulley gear as well
as the gear, etc. constituting the gear unit can
possibly be separated to pieces. In such a case,
assemble these parts by referring to the assembly
and configuration diagram in Fig. 21.
Removing the actuator motor and belt
(See Fig.18~21)
1.
2.
3.
4.
5.
Remove the two screws I retaining the gear bracket
(See Fig.18).
While pressing the pawl "t" fixing the gear bracket in the
arrow direction, remove the gear bracket
(See Fig.18).
From the notch "u section" on the chassis assembly
fixing the edge of gear bracket, remove and take out the
gear bracket(See Fig. 19).
Remove the belts respectively from the right and left
actuator motor pulleys and pulley gears(See Fig. 18).
After turning over the chassis assembly, remove the
actuator motor while spreading the four pawls "v" fixing
the right and left actuator motors in the arrow
direction(See Fig. 20).
Pulley gear
Belt
Motor pulley
Belt
Pulley gear
Motor pulley
Gear bracket
t
I
I
Pawl
v
Actuator motor
v
Chassis assembly
u
Gear bracket
Pulley gear
Gear B
Cylinder gear
Gross gear U
Gear C
Gross gear L
Select gear
Gear B
Gear C
Pulley gear
Assembly and Configuration Diagram
MX-G850V/MX-G750V
1-23
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the cams R1/R2 assembly
and cam gear q(See Fig.22)
1.
Remove the slit washer fixing the cams R1 and R2
assembly.
2.
By removing the two pawls "w" fixing the cam R1,
separate R2 from R1.
Remove the slit washer fixing the cam gear "q".
3.
Pull out the cam gear "q" from the C.G. base assembly.
4.
Removing the C.G. base assembly
(See Fig.22 and 23)
Remove the three screws J retaining the C.G. base
assembly.
[Caution]
To reassemble the cylinder gear, etc.with the
cam unit (cam gear and cans R1/R2 assembly),
gear unit and drive unit, align the position of the
pawl "x" on the drive unit to that of the notch on
the cam gear "q". Then, make sure that the
gear unit is engaged by turning the cam gear
"q" (See Fig. 24).
Slit washer
Cam gear q
J
Slit washer
Cam R2
Pawl
w
Cam R1
Cam switch board
C.G. base assembly
Pawl
w
Notch
Pawl
x
Cylinder
gear
Drive unit
Fig.22
Cam gear q
Cam R1, R2 assembly
Gear unit
Gear bracket
Fig.23
1-24
MX-G950V/MX-G880V
MX-G850V/MX-G750V
< Cassette mechanism section >
Removing the playback,recording and eraser
heads (See Fig.1~3)
1. While shifting the trigger arms seen on the right
side of the head mount in the arrow direction,turn
the flywheel R in counterclockwise direction until
the head mount has gone out with a click
(See Fig. 1).
2. When the flywheel R is rotated in counterclockwise
direction, the playback / recording & eraser head will
be turned in counterclockwise direction from the
position in Fig.2 to that in Fig.3.
3. At this position, disconnect the flexible P.C.board
(outgoing from the playback head) from the
connector CN301 on the head amp. and mechanism
control P.C. board.
4. Remove the flexible P.C.board from the chassis
base.
5. Remove the spring "a" from behind the playback /
recording head.
6. Loosen the reversing azimuth screw retaining the
playback head.
7. Take out the playback head from the front of the
head mount.
8. The recording and eraser heads should also be
removed similarly according to Steps 1~7 above.
Flexible
P.C.board
Cassette mechanism
Trigger armHead mount
Fig.1
Playback/Recording &
eraser head
(Mechanism A side)
Flywheel R
Spring "a"
Trigger arm
Reassembling the playback, recording
and eraser heads (See Fig.3)
1. Reassemble the playback head from the front of
the head mount to the position as shown in Fig.3.
2. Fix the reversing azimuth screw.
3. Set the spring a from behind the playback head.
4. Attach the flexible P.C.board to the chassis base
as shown in Fig.3.
5. The recording and eraser heads should also be
reassembled similarly according to Steps 1~4
above.
CN301
Head amplifier & mechanism
control P.C. board
Fig.2
Playback head
Spring "a"
CN302
FPC holder
Fig.3
Flywheel R
(Mechanism A side)
Reversing azimuth
screw
Head
mount
Flexible
P.C.board
Head amplifier &
mechanism control
P.C. board
(Mechanism B side)
1-25
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the head amp. and mechanism
control board (See Fig. 4)
1.Remove the cassette mechanism assembly.
2.After turning over the cassette mechanism
assembly,remove the five screws "A" retaining
the head amplifier & mechanism control board.
3.Disconnect the connectors CN303 on the board
and the connectors CN301 and on CN302 both
the right and left side reel pulse boards.
4.When necessary, remove the 4pin parallel
wire soldered to the main motor
Removing the capstan motor assembly
(See Fig.5 to 7)
1.Remove the six screws "B" retaining capstan
motor assembly (See Fig. 5).
2.While raising the capstan motor, remove the
capstan belts A and B respectively from the
motor pulley (See Fig. 6).
Caution 1: Be sure to handle the capstan
belts so carefully that these belts
will not be stained by grease and
other foreign matter. Moreover,
these belts should be hand while
referring to the capstan belt
hanging method.(See Fig.6 and 7)
A
Flexible
board
Head amplifier &
mechanism control board
AA
CN303
CN302 CN301
Flexible
board
Fig.4
BB
Capstan motor
assembly
AA
1-26
Capstan
belt A
Fig.5
Capstan motor
Capstan
belt A
Capstan
belt B
Motor pulley
Fig.7 Fig.6
BBBB
Capstan
belt B
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Removing the capstan motor (See Fig. 8)
From the joint bracket, remove the two screws "C"
retaining the capstan motor.
Removing the flywheel (See Fig. 9,10)
1.Remove the head amp. and mechanism control
P.C.Board.
2.Remove the capstan motor assembly.
3.After turning over the cassette mechanism, remove
the two slit washers "b" fixing the capstan shafts
R and L, and pull out the flywheels R and L respectively
from behind the cassette mechanism.
C
Capstan motor
Joint
bracket
C
Fig.8
Flywheel R Flywheel L
Flywheel R Flywheel L
Fig.10
Removing the reel pulse board and solenoid
(See Fig. 11)
1.Remove the five pawls (c,d,e,f,g) retaining
the reel pulse P.C.Board.
2.From the surface of the reel pulse P.C.Board parts,
remove the two pawls "h" and "i" retaining the solenoid.
hi
Solenoid
c
a
d
Slit
washer "a"
Fig.9
e
f
b
Slit
washer "b"
Reel pulse board
g
Solenoid
Fig.11
1-27
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Adjustment method
Measurement instruments required
for adjustment
1. Low frequency oscillator,
This oscillator should have a capacity to output 0dBs
to 600ohm at an oscillation frequency of 50Hz-20kHz.
2. Attenuator impedance : 600ohm
3. Electronic voltmeter
4. Frequency counter
5. Wow flutter meter
6. Test tape
VT712 : For Tape speed and wow flutter ( 3kHz)
VT710 : Head azimuth
VT724 : For Reference level (1kHz)
7. Blank tape
TAPE : AC-225
8. Torque gauge : For play and back tension
Forward ; TW2111A, Reverse ; TW2121A
Fast Forward and Rewind ; TW2231A
9. Test disc
: CTS-1000(12cm),GRG-1211(8cm)
10. Jitter meter
Radio input signal
AM modulation frequency : 400Hz
Modulation factor : 30%
FM modulation frequency : 400Hz
Frequency displacement : 22.5kHz
Frequency Range
AM 531kHz~1710kHz
FM 87.5MHz~108MHz
Standard measurement positions of volume
and switch
Power : Standby (Light STANDBY Indicator)
Sub woofer VOL. : Minimum
Sound mode : OFF
Main VOL. : 0 Minimum
Traverse mecha set position : Disc 1
Mic MIX VOL : MAX
ECHO : OFF
Measurement conditions
Power supply voltage
AC110V/127V/220V/230V 240V , adjustable
Measurement
output terminal : Speaker out
: TP101(Mesuring for TUNER/DECK/CD)
: Dummy load 6ohm
Precautions for measurement
1. Apply 30pF and 33kohm to the IF sweeper output
side and 0.082 F and 100kohm in series to
the sweeper input side.
2. The IF sweeper output level should be made as
low as possible within the adjustable range.
3. Since the IF sweeper is a fixed device, there is
no need to adjust this sweeper.
4. Since a ceramic oscillator is used, there is no need
to perform any MPX adjustment.
5. Since a fixed coil is used, there is no need to adjust
the FM tracking.
6. The input and output earth systems are separated.
In case of simultaneously measuring the voltage
in both of the input and output systems with an
electronic voltmeter for two channels, therefore,
the earth should be connected particularly.
7. In the case of BTL connection amplifier, the minus
terminal of speaker is not for earthing. Therefore,
be sure not to connect any other earth terminal
to this terminal. This system is of an OTL system.
1-28
Arrangement of adjusting positions
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Cassette mechanism section (Mechanism A section)
Head azimuth
adjusting screw
(Forward side)
Playback
head
Head azimuth
adjusting screw
(Reverse side)
Cassette mechanism section (Back side)
Head azimuth
adjusting screw
(Forward side)
Playback, recording and eraser
heads or playback head
Head azimuth
adjusting screw
(Reverse side)
Cassette Mechanism Unit Section
Tape speed ADJ
Bias ADJ L
Bias ADJ R
1-29
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Tape recorder section
Items Measurement
Confirmation
of head angle
Confirmation
of tape speed
conditions
Test tape
:VT710 (10kHz)
Measurement
output terminal
:Speaker terminal
Speaker R
(Load resistor:6 )
:Headphone terminal
Test tape
:VT712 (3kHz) or
TMT7036 (3kHz)
Measurement
output terminal
:Headphone terminal
1.Playback the test tape VT710 (10kHz).
2.With the playback mechanism or recording &
playback mechanism, adjust the head azimuth
screw so that the forward and reverse output
levels become maximum.After adjustment,lock
the head azimuth at least by half a turn.
3.In either case,this adjustment should be
performed in both the forward and reverse
directions with the head azimuth screw.
<Constant speed>
Adjust VR301 so that the frequency counter reading
becomes 3,000Hz 60Hz when playing back the
test tape VT712 (3kHz)with the playback mechanism
or playback and recording mechanism after ending
forward winding of the tape.
Reference values for confirmation items
Items Measurement
Double tape
speed
conditions
Test tape
:VT712 (3kHz)
Measurement
output terminal
:Speaker terminal
Speaker R
(Load resistance:6 )
measurement
output terminal
:Headphone terminal
After setting to the double speed motor, confirm
that the frequency counter reading becomes
4,800+400/-300Hz when the test tape VT712
(3kHz) has been play back with the playback
mechanism.
Measurement method
Measurement method
Standard
values
Maximum
output
Tape speed
of decks
(A and B)
:3,000Hz
60Hz
Standard
values
4,800+400/
-300Hz
Adjusting
positions
Adjust the head
azimuth screw
only when the
head has been
changed.
VR301
Adjusting
positions
Playback
mechanism side
Difference
between the
forward and
reverse speed.
P.mecha and
R/P mecha
speed
Wow & flutter
1-30
Test tape
:VT712 (3kHz)
Measurement
output terminal
:Headphone terminal
When the test tape VT712 (3kHz) has been played
back with the playback mechanism or recording and
playback mechanism at the beginning of forward
winding, the frequency counter reading of the
difference between both of the mechanisms should
be 6.0Hz or less.
When the test tape VT712 (3kHz) has been played
back with the playback mechanism or recording and
playback mechanism at the beginning of forward
winding the frequency counter reading of wow &
flutter should be 0.25% or less(WRMS).
60Hz or
less
with in
0.25%
JIS(WTD)
Both the playback
and recording &
playback
mechanism
Both the playback
and recording &
playback
mechanism
Items Measurement
conditions
Measurement method
Standard
values
Adjusting
positions
1.With the recording and playback mechanism,
load the test tapes(AC-225 to TYP ),and set the
mechanism to the recording and
pausing conditions in advance.
2.After connecting 100 in series to the recorder
head,measure the bias current with a valve
voltmeter at both of the terminals.
3.After resetting the [PAUSE] mode,start recording.
At this time,adjust VR101 for LcH and VR201 for
RcH so that the recording bias current values
become 4.0 A (TYP ).
1.With the recording and playback mechanism,load
the test tape(AC-225 to TYP ),and set the
mechanism to the recording and pausing condition
in advance.
2.While repetitively inputting the reference frequency
signal of 1kHz and 10kHz from OSC IN, record and
playback the test tape.
3.While recording and playing back the test tape in
TYP ,adjust VR101 for LcH and VR201 for RcH
so that the output deviation between 1kHz and
10kHz becomes -1dB 2dB.
Adjustment of
recording bias
current
(Reference
value)
Adjustment of
recording and
playback
frequency
characteristics
*Mode : Forward or
reverse mode
*Recording mode
*Test tape
: AC-225
Measurement output
terminal
:Both recording and
headphone terminals
Reference frequency
:1kHz and 10kHz
(REF:-20dB)
Test tape
:TYP AC-225
Measurement input
terminal
:OSC IN
AC-225
:4.20 A
Output
deviation
between
1kHz and
10kH
:-1dB 2dB
LcH
:VR101
RcH
:VR201
LcH
:VR101
RcH
:VR201
Electrical performance
Items Measurement
conditions
Measurement method
Standard
values
Adjusting
positions
1.While changing over to and from BIAS 1 and 2,
confirm that the frequency is changed.
2.With the recording and playback mechanism.
load the test tape (AC-225 to TYP ),and set the
mechanism to the recording and pausing
conditions in advance.
3.Confirm that the BIAS TP frequency on the
P.C.board is 100kHz 6kHz.
1.With the recording and playback mechanism,
load the test tapes(AC-225 to TYP ),and set the
mechanism to the recording and pausing condition
in advance.
2.After setting to the recording conditions,connect
1M in series to the eraser head on the recording
and playback mechanism side,and measure the
eraser current from both of the eraser terminal.
Recording
bias frequency
Eraser current
(Reference
value)
*Recording and
playback side forward
or reverse
*Test tape
:TYP AC-225
*Measurement
terminal BIAS TP on
P.C.board
*Recording and
playback side forward
or reverse
*Recording mode
*Test tape
:AC-225
Measurement terminal
Both of the eraser
head
100kHz
+9kHz
-7kHz
TYP
:75mA
Reference values for electrical function confirmation items
MX-G950V/MX-G880V
MX-G850V/MX-G750V
1-31
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Extension code connecting method
CD changer mechanism
assembly
CD servo board
CN651
CN661
VCD board
CN102
CN504
Main board
1-32
Flow of functional operation until TOC read
Power ON
Play Key
Slider turns REST
SW ON.
Automatic tuning
of TE offset
Confirm that the voltage at the pin5
of CN801 is "H"\"L"\"H".
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Check Point
Tracking error waveform at TOC reading
Approx.3sec
Tracking
servo
off states
Automatic measurement
of TE amplitude and
automatic tuning of
TE balance
VREF
pin 25 of
IC601(TE)
Approx
1.8V
Disc states
to rotate
Tracking
servo
on states
Disc to be
braked to stop
TOC reading
finishes
500mv/div
2ms/div
Fig.1
Laser ON
Detection of disc
Automatic tuning of
Focus offset
Automatic measurement of
Focus S-curve amplitude
Disc is rotated
Focus servo ON
(Tracking servo ON)
Automatic measurement of
Tracking error amplitude
Automatic tuning of
Tracking error balance
Check that the voltage at the
pin40 of IC651 is + 5V?
Confirm that the Focus error
S-cuve signal at the pin28 of
IC651 is approx.2Vp-p
Confirm that the signal from
pin24 IC651 is 0V as a
accelerated pulse during
approx.400ms.
Confirm the waveform of
the Tracking error signal.
at the pin 25 of IC601 (R604)
(See fig-1)
Automatic tuning of
Focus error balance
Automatic tuning of
Focus error gain
Automatic tuning of
Tracking error gain
TOC reading
Play a disc
Confirm the eys-pattern
at the lead of TP1
1-33
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Maintenance of laser pickup
(1) Cleaning the pick up lens
Before you replace the pick up, please try to
clean the lens with a alcohol soaked cotton
swab.
(2) Life of the laser diode
When the life of the laser diode has expired,
the following symptoms will appear.
1. The level of RF output (EFM output : ampli
tude of eye pattern) will below.
Is the level of
RFOUT under
1.25V 0.22Vp-p?
YES
O.K
NO
Replace it.
Replacement of laser pickup
Turn off the power switch and, disconnect the
power cord from the ac outlet.
Replace the pickup with a normal one.(Refer
to "Pickup Removal" on the previous page)
Plug the power cord in, and turn the power on.
At this time, check that the laser emits for
about 3seconds and the objective lens moves
up and down.
Note: Do not observe the laser beam directly.
Play a disc.
Check the eye-pattern at TP1.
Finish.
(3) Semi-fixed resistor on the APC PC board
The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser
power. Since this adjustment should be performed to match the characteristics of the whole optical block, do not
touch the semi-fixed resistor.
If the laser power is lower than the specified value, the laser diode is almost worn out, and the laser pickup should
be replaced.
If the semi-fixed resistor is adjusted while the pickup is functioning normally, the laser pickup may be damaged
due to excessive current.
1-34
Description of major ICs
1
2
3
4
5
6
78
9
10 11
12
13
141516
17
1819
2021
22
23
24
AMP
Pre
Source
CTRL
AMP
ALC
ALC
AMP
AMP
EQ
CTRL
ALC
REPPLE
REJ
Pre
Pre
L1
L2
R1
R2
NF2
NF1
OUT1
OUT2
EQ1
EQ2
CTL2
CTL1
RIN2
RIN1
RNF2
RNF1
ROUT2
ROUT1
LC
LPF GND
EQ
CTL
RF
VCC
2. Pin Function
Pin
No.
Symbol
I/O
Function
Function
I/O
Symbol
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
I
I
16
17
18
19
20
21
22
23
24
I
I
O
I
I
Playback amplifier output
I
I
I
RIN1
OUT1
1 Block diagram
Playback amplifier input
R1
R2
I
Playback amplifier input
NF2
Playback amplifier negative feedback
OUT2 Playback amplifier output
EQ2 I
Equlaizer
CTL2 I Pre Amplifier input swithing time
constant
RIN2 I
Recording amplifier input
RNF2 I Recording amplifier negative feedback
ROUT2
O
Recording amplifier output
O
LC I
ALC low cut
LPF
I
ALC low pass filter
GND I
Vcc Power supply
RF
I
Repple filter
EQCTL EQ control
ROUT
O
Recording amplifier output
RNF1 Recording amplifier negative feedback
I Recording amplifier input
CTL1
Pre amplifier input swithing control
EQ1 Equlayzer
Playback amplifier negative feedback
NF1
L2 I
L1
Playback amplifier input
Playback amplifier input
AN7345 (IC302) : PB / REC amp
MX-G950V/MX-G880V
MX-G850V/MX-G750V
1-35
MX-G950V/MX-G880V
MX-G850V/MX-G750V
AN22000A-W (IC601) : RF head amp.
1. Pin layout
1234 5678910111213141516
2. Block diagram
OFTR
COFTR
BDO
11
BCDO
14
13
12
3TOUT
CEA
9
OFTR
BDO
10
3TENV
NRFDET
15
FEN
22
FEOUT
23
SUBT
TEN
21
20
SUBT
19
17181920212223242526272829303132
18
VDET
PDLDVDETTEBPFTEOUT
2
1
3
VCC
16
GND
2526
8
ARF
7
CAGC
RFIN
56
RFOUT
4
RFN
3. Pin function
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
AGC
NRFDET
RF_EQ
Function
APC amp input terminal.
APC amp output terminal.
Power supply.
RF amp negative input terminal.
RF amp output terminal.
AGC input terminal.
AGC loop filter capacitor connection terminal.
AGC output terminal.
Capacitor connection terminal for HPF-amp.
3TENV output terminal.
Capacitor connection terminal for RF enberope detection.
BDO output terminal.
Capacitor connection terminal for RF enverope detection.
OFTR output terminal.
NRDET output terminal.
Ground terminal.
GCA BCA
AMP
32
31
A
C
GCA BCA
AMP
30
29
B
D
E
GCA BCA
AMP
27
Pin No.
GCA BCA
AMP
28
F
Function
VREF output terminal.
17
VDET output terminal.
18
VDET input terminal.
19
TE amp. output terminal.
20
TE amp. negative input terminal.
21
FE amp. negative input terminal.
22
FE amp. output terminal.
23
GCTL & APC terminal.
24
FBAL control terminal.
25
TBAL control terminal.
26
Tracking signal input terminal 1.
27
Tracking signal input terminal 2.
28
Focus signal input terminal 4.
29
Focus signal input terminal 3.
30
Focus signal input terminal 2.
31
Focus signal input terminal 1.
32
TBAL FBAL
24
GCTL
17
VREF
1-36
BA3835S (IC812) : SPI B.P.F.
1.Block Diagrams
MX-G950V/MX-G880V
MX-G850V/MX-G750V
BIASC
VREFC
RREF
DIFOUT
N.C.
N.C.
CIN
AIN
VCC
1
2
3
4
5
6
7
8
9
2.Pin Function
No. Symbol
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
BIASC
VREFC
RPEF
NC
NC
NC
CIN
AIN
VCC
SPI-A
SPI-B
SPI-C
SPICSB
NC
NC
TEST
AOUT
GND
A-C
DIF
105Hz
BPF
340Hz
BPF
1kHz
BPF
3.4kHz
BPF
10.5kHz
BPF
REFERENCE
CURRENT
PEAK
HOLD
PEAK
HOLD
PEAK
HOLD
PEAK
HOLD
PEAK
HOLD
I/O
-
-
-
-
-
-
-
I
-
O
O
O
O
-
-
-
O
-
BIAS
VREF
RES
RES
MPX
RES
RES
RES
DEC
18
17
16
15
14
13
12
11
10
GND
AOUT
TEST
N.C.
N.C.
SEL
C
B
A
Function
Decoupling condenser connection terminal.
Decoupling condenser connection terminal.
Reference resistance connection terminal.
Non connect.
Non connect.
Non connect.
Connected to GND of audio system through a condenser.
Inputs the audio signal through a condenser.
Power supply terminal.
Output selection control terminal.
Output selection control terminal.
Output selection control terminal.
Output selection control terminal.
Non connect.
Non connect.
Connected to GND upon normal use.
Multi-plexor output terminal.
Connect to GND.
1-37
MX-G950V/MX-G880V
MX-G850V/MX-G750V
ES3883F (IC104) : VCD companion chip
1.Pin function
80
81
~
100
2.Blockdiagram
CD ROM
Kit
ROM
~
51
50
~
31
1
30~
CD-ROM Controller
Interrupt
Control
Audio DAC
NTSC/PAL Video
Remote
receiver
Speakers
Television
Vista ES3880
(Video CD)
Remote
Control
DSC
PLL
Echo/Surround/Vocal Assist
Preamp
Volume Control
Preamp
Volume Control
VFD
Driver
VFD
Panel
DRAM
Mic 1
Mic 2
3.Pin function
Pin No.
1,25:26,31,72,75,77,91,100
5,16,32,66,73,78,90
6
7
9
11
70
69
68
67
14
18
20
34
35
36
38
39
40
81,83,85,93,95,97,99,8
10
12
13
15
17
19
Symbol I/O Function
I
VSS
VCC
DSC_C
AUX0
AUX1
AUX2
AUX3
AUX4
AUX5
AUX6
AUX7
AUX8
AUX9
AUX10
AUX11
AUX12
AUX13
AUX14
AUX15
DSC_D[7:0]
DSC_S
DCLK
EXT_CLK
RESET_B
MUTE
MCLK
TWS
SPLL_OUT
Ground.
I
Voltage supply 5v.
I
Clock programming to access internal registers.
I/O
Servo Foward or Control Pin.
I/O
Servo Reverse or Control Pin.
I/O
Servo LDON or Control Pin.
I/O
Servo CW/Limit or Control Pin.
I/O
Servo CCW/Close or Control Pin.
I/O
Servo Data or Control Pin.
I/O
Servo XLAT or Control Pin/VFD_DO.
I/O
Servo BRKM/Sense or Control Pin/VFD_DI.
I/O
Servo Mute/Open or Control Pin/VFD_CLK.
I/O
Servo SQS0 or Control Pin.
I/O
Servo SQCK or Control Pin.
I/O
3880 IRQ or Interrupt Output or Control Pin.
I/O
CD C2PO or Interrupt input or Control Pin.
I/O
Serial Interrupt/CD-Mute or Control Pin.
I/O
Servo SCOR(S0S1) or Interrupt Input or Control Pin.
I/O
Interrupt Input or Control Pin.
I/O
Data for programming to access Internal registers.
I
Strobe for programming to access Internal registers.
O
Dual-purpose pin DCLK is the MPEG decoder clock.
I
EXT_CLK is the external clock EXT_CLK is an input during bypass PLL mode.
I
Video reset(active-low).
O
Audio mute.
I
Audio master clock.
I
Dual-purpose pin TWS is the transmit audio frame sync.
O
SPLL_OUT is the select PLL output.
1-38
Number
21
22
23
24
2:4,27:30,76
33
37
41,51
42
43
44
45:46
47:48
49
50
52
53
54
55
56:57,62:63
58
59,60
61
64
65
71
74
79
80
82
84
86:89,92,94,96,98
Name
TSD
TBCK
RWS
SEL_PLL1
RSTOUT_B
NC
RSD
SEL_PLL0
RBCK
SER_IN
VSSAA
VCM
VREFP
VCCAA
AOR+,AORAOL-,AOL+
MIC1
MIC2
VREF
VREFM
RSET
COMP
VSSAV
CDAC
VCCAV
YDAC
VDAC
ACAP
XOUT
XIN
PCLK
2XPCLK
HSYN_B
VSYN_B
YUV[7:0]
MX-G950V/MX-G880V
MX-G850V/MX-G750V
I/O Function
I
Transmit audio data input.
I
Transmit audio bit clock.
O
Dual-purpose pin RWS is the audio frame sync.
I
Pins SEL_PLL[1.0] select the PLL clock frequency for the DCLK output.
SEL_PLL1
0
0
1
1
O
Reset output(active-low).
No connect.Do not connect to these pins.
O
Dual-purpose pin. RSD is the receive audio data input.
I
SEL_PLL0 along with SEL_PLL1 select the PLL clock frequency for the
DCLK output.See the table for pin number 23.
O
Dual-purpose pin.RBCK is the receive audio bit clock.
I
SER_IN is the serial input DSC mode.
0-Parallel DSC mode.
1-Serial DSC mode.
I
Audio Analog Ground.
I
ADC Common Mode Reference(CMR) buffer output.CMR is approximately
2.25V.Bypass to analog ground with 47 F electrolytic in parallel with 0.1 F.
I
DAC and ADC maximum reference.
Bypass to VCMR with 10 F in parallel with 0.1 F.
I
Analog VCC, 5V.
O
Right channel output.
O
Left channel input.
I
Microphone input 1.
I
Microphone 2.
I
Internal resistor divider generates Common Mode Reference(CMR) voltage.
Bypass to analog ground with 0.1 F.
I
DAC and ADC minimum reference.
Bypass to VCMR with 10 F in parallel with 0.1 F.
I
Full scale DAC current adjustment.
I
Compensation pin.
I
Video Analog Ground
O
Modulates chrominance output.
I
Video VCC, 5V
O
Y Iuminance data bus for screen video port.
O
Composite video output.
I
Audio CAP.
O
Crystal output.
I
27 MHz crystal input.
I/O
13.5 MHz pixel clock.
I/O
27 MHz(2 times pixel clock).
O
Horizontal sync(active-low).
O
Vertical sunc(active-low).
I
YUV data bus for screen video port.
SEL_PLL0
0
0
0
1
DCLK
Bypass PLL(input mode)
27 MHz(output mode)
32.4 MHz(output mode)
40.5 MHz(output mode)
ES3883F(2/2)
1-39
MX-G950V/MX-G880V
MX-G850V/MX-G750V
BA3837 (IC466) : MIC mixer
1.Block diagram
C
16
B
15
14
A
ROUT
13
LP
12
LP
11
LP
10
RIN
9
1
VCC
2.Pin function
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
LOGIC
+
-
2
MIC
Symbol
VCC
MIC IN
LOUT
FK
TK
LIN
BIAS
GND
RIN
LPF1
LPF2
LPF3
ROUT
CONTA
CONTB
CONTC
-
+
3
LOUT
+
-
SW2 SW1
4
FK
I/O
-
O
-
-
-
O
O
O
O
Power supply
Microphone mixing input
I
Channel L output
Non connect
Non connect
Channel L input
I
Signal bias
I
Connect to GND
Channel R input
I
Connects to LPF time constant element
Connects to LPF time constant element
LPF outpout
Channel R output
Mode select input A
I
Mode select input B
I
Mode select input C
I
TK
-
+
-
+
R
L-R
L+R
-
+
+
L
+
-
5
6
LIN
7
BIAS
8
GND
Description
1-40
BU2092 (IC642) : Port expander
1.Terminal Layout
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Vss
DATA
CLOCK
LCK
Q0
Q1
Q2
Q3
Q4
1
2
3
4
5
6
7
8
9
CONTROL
CIRCUIT
12BIT SHIFT RESISTER
12BIT STRAGE RESISTER
OUTPUT BUFFER(OPEN DRAIN)
17
16
15
14
13
12
11
10
18
Vdd
OE
Q11
Q10
Q9
Q8
Q7
Q6
Q5
2.Pin Function
Pin No.
1
2
3
4
5~16
17
18
Symbol
Vss
DATA
CLOCK
LCK
Q0~Q11
OE
Vdd
I/O
-
I
I
I
O
I
-
Function
Connect to GND
Serial Data input
Shift Clock of Data
Latch Clock of Data
Parallel Data Output
Latch Data L H
OUTPUT ON OFF
Output Enable
Power Supply
1-41
MX-G950V/MX-G880V
MX-G850V/MX-G750V
BU9253AS (IC902) : LPF & Echo mix.
1.Pin layout & block diagram
1
GND
ECHO VR
BIAS
DAINT IN
2
3
4
5
OSC
COUNTER
18
17
16
15
14
CR
MUTE
VCC
ADINT IN
DAINT OUT
DALPF IN
DALPF OUT
MIX OUT
2.Pin function
Pin No. Symbol
1
2
ECHO VR
3
4
5
6
7
8
9
DAINT IN
DAINT OUT
DALPF IN
DALPF OUT
MIX OUT
10
11
12
13
14
ADLPF IN
ADLPF OUT
ADINT OUT
ADINT IN
15
16
17
18
6
7
- +
8
9
GND
BIAS
MIX IN
VCC
NC2
MUTE
CR
D/A
MIX
SRAM
I/O
I
-
I
O
I
O
O
I
I
O
O
I
-
-
I
-
A/D
13
ADINT OUT
12
ADLPF OUT
- +
11
ADLPF IN
10
MIX IN
Descriptions
Connect GND
Echo level control
Non connect
Analog part DC bias
DA side integrator input
DA side integrator output
DA side LPF input
DAside LPF output
Mix AMP output for original tone& echo tone
Mix AMP input pin for original tone
AD side LPF input
AD side LPF output
AD side integrator output
AD side integrator input
Power supply
Non connect
Mute control signal input
CR pin for oscillator
1-42
ES3880FL (IC101) : MPEG decoder
MX-G950V/MX-G880V
MX-G850V/MX-G750V
1. Terminal layout
80 ~ 51
100 ~ 81
1 ~ 30
3. Pin function
Pin No.
Symbol I/O Function
1
VDD
2
RAS#
3
DWE#
4~12
13~28
32~39
45~49
55~62
68~79
29
30
31
40
41
42
43
44
50
51
52
53
54
63
64
65
66
67
80
81
DA0~8
DBUS0~15
RESET#
VSS
VDD
YUV0~7
VSYNC
HSYNC
CPUCLK
PCLK2X
PCLK
AUX0~4
VSS
VDD
AUX6
AUX5
AUX7
LD0~7
LWR#
LOE#
LCS3#
LCS1#
LCS0#
LA0~11
VSS
VPP
2. Block diagram
Processor
Interface
31 ~ 50
Serial
Audio
Interface
TDM
Interface
3.3V power supply
Row address strobe
O
DRAM write enable
O
DRAM multiplexed row and column address bus
O
DRAM data bus
I/O
System reset
I
Ground
-
3.3V power supply
YUV[7:0] 8-bit video data bus
O
Vertical sync
I/O
Horizontal sync
I/O
RISC and system clock input. CPUCLK is used
I
only if SEL_PLL[1:0] = 00 to bypass PLL.
Doubled 54MHz pixel clock
I/O
27MHz pixel clock
I/O
Auxiliary control pins 4:0
I/O
AUX0 and AUX1 are open collectors.
Ground
-
3.3V power supply
Auxiliary control pins 6
I/O
Auxiliary control pins 5
I/O
Auxiliary control pins 7
I/O
RISC interface data bus
I/O
RISC interface write enable
O
RISC interface output enable
O
RISC interface chip select
O
RISC interface chip select
O
RISC interface chip select
O
RISC interface address bus
O
Ground
-
5.0V power supply
-
LA[17:0]
LD[7:0]
LCS3#, LCS#[1:0]
LWR#
LOE#
ACLK
ATCLK
AOUT
ARFS
ATFS
ARCLK
SEL_PLL[1:0]
TDMCLK
TDMDR
TDMFS
AIN
RISC
Processor
Serial Audio
Interface
TDM
Interface
Pin No.
82~87
88
89
90
91
92
93
94
95
96
97
98
99
100
Huffman
Decoder
64x32 ROM
32x32 SRAM
Registers
Symbol I/O
LA12~17
ACLK
AOUT
SEL_PLL0
ATCLK
ATFS
SEL_PLL1
DA9
DOE#
AIN
ARCLK
ARFS
TDMCLK
TDMDR
TDMFS
CAS#
VSS
DRAM Interface
2Kx32 ROM
512x32 SRAM
MPEG
Processor
Video Output
On Screen
Display
DRAM DMA
Controller
Function
RISC interface address bus
O
Master clock for external audio DAC
I/O
Audio interface serial data output when
O
selected.
System and DSCK output clock
I
frequency selection at reset time. The
matrix below lists the available clock
frequencies and their respective PLL
bit settings.
SEL_PLL1 SEL_PLL0 DCLK
0 0 Bypass PLL (input mode)
0 1 54MHz (output mode)Default
1 0 67.5MHz (output mode)
1 1 81.0MHz (output mode)
I/O
Audio transmit bit clock
O
Audio transmit frame sync
I
Refer to the description and matrix for
SEL_PLL0 pin 89.
DRAM multiplexed row and column
O
address line 9
DRAM output enable
O
Audio serial data input
I
Audio receive bit clock
I
Audio receive frame sync
I
TDM serial clock
I
TDM serial data receive
I
TDM frame sync
I
DRAM column address strobe
O
Ground
-
RAS#
DA[9:0]
DBUS[15:0]
DOE#
DWE#
CAS#
AUX[7:0]
YUV[7:0]
PCLK2X
PCLK
VSYNC
HSYNC
CPUCLK
RESET#
DRAM
AUX
Screen
Display
Misc.
1-43
MX-G950V/MX-G880V
MX-G850V/MX-G750V
GLT44016-35J4-X (IC103) : Dram
1. Pin layout
Vcc
DQ
DQ
DQ
DQ
Vcc
DQ
DQ
DQ
DQ
NC
NC
WE
RAS
NC
A
Vcc
1
1
2
2
3
3
4
4
5
6
5
7
6
8
7
9
8
10
11
12
13
14
15
0
16
A
1
17
A
2
18
A
3
19
20
2. Block diagram
OE
WE
UCAS
LCAS
RAS
40
Vss
39
DQ
38
DQ
37
DQ
36
DQ
35
Vss
34
DQ
33
DQ
32
DQ
31
DQ
30
NC
29
LCAS
28
UCAS
27
OE
26
8
A
25
A
7
24
A
6
23
A
5
A
4
22
21
Vss
RAS
GENERATOR
16
15
14
13
12
11
10
9
CLOCK
3. Pin function
Pin Name
0~A8
A
RAS
UCAS
LCAS
WE
OE
1
~DQ
DQ
Vcc
Vss
NC
CAS
CLOCK
GENERATOR
Function
Address inpits
Row address strobe
Columu address strobe / upperbyte control
Columu address strobe / lower byte control
Write enable
Output enable
16
Dara inputs / outputs
+5V power supply
Ground
No connection
WE
CLOCK
GENERATOR
OE
GENERATOR
CLOCK
Vcc
Vss
Data I/O BUS
COLUMN DECODERS
REFRESH
COUNTER
Y
9
A
0
A
1
A
7
A
8
ADDRESS BUFFWRS
AND PREDECODERS
X0 - X
8
SeNSE AMPLIFIERS
- Y
0
8
512 16
512 16
ROW
DECODERS
512
MEMORY
ARRAY
I/O
BUFFER
I/O1
I/O2
I/O3
I/O4
I/O5
I/O6
I/O7
I/O8
I/O9
I/O10
I/O11
I/O12
I/O13
I/O14
I/O15
I/O16
1-44
LA1838 (IC1): FM AM IF amp & detector, FM MPX decoder
1. Block Diagram
MX-G950V/MX-G880V
MX-G850V/MX-G750V
30
ALC
BUFF
FM
S-METER
FM IF
1
2. Pin Function
Pin
Symbol
No.
FM IN
1
AM MIX
2
3
FM IF
AM IF
4
GND
5
6
TUNED
STEREO
7
8
VCC
9
FM DET
10
AM SD
FM VSM
11
AM VSM
12
13
MUTE
14
FM/AM
MONO/ST O
15
29
28
AM
OSC
SD
COMP
S-CLRVE
PM
DET
2
I/O
I
This is an input terminal of FM IF
REG
AM
MIX
AM/FM
IF-BUFF
3
27
FM
RF.AMP
AM IF
4
26
AGC
AM
S-METER
GND
Function
DET
5
signal.
This is an out put terminal for AM
O
mixer.
I
Bypass of FM IF
Input of AM IF Signal.
I
I
This is the device ground terminal.
When the set is tunning,this terminal
O
becomes "L".
O
Stereo indicator output. Stereo "L",
Mono: "H"
III
This is the power supply terminal.
I
FM detect transformer.
I
This is a terminal of AM ceramic filter.
O
Adjust FM SD sensitivity.
O
Adjust AM SD sensitivity.
I/O
When the signal of IF REQ of IC121(
LC72131) appear, the signal of FM/AM
IF output. //Muting control input.
Change over the FM/AM input.
I
"H" :FM, "L" : AM
Stereo : "H", Mono: "L"
25
TUNING
DRIVE
6
24
STEREO
DRIVE
7
22
23
P-DET
VCC
89
Pin
Symbol
No.
16
L OUT
17
R OUT
18
19
20
21
22
23
24
25
26
27
28
29
30
L IN
R IN
RO
LO
MPX IN
FM OUT
AM DET
AM AGC
AFC
AM RF
REG
AM OSC
OSC BUFFER
21
DECODER
ANIT-BIRDIE
VCO
384KHz
10
20
STEREO
5N
SW
FF
38k
11
I/O
O
Left channel signal output.
O
Right channel signal output.
Input terminal of the Left channel post
I
18
19
MUTE
FF
/
19k
2
12 13
FF
19k
/
LS
Function
17 16
PILOT
DET
14
AMP.
Input terminal of the Right channel
I
post AMP.
Mpx Right channel signal output.
O
O
Mpx Left channel signal output.
I
Mpx input terminal
FM detection output.
O
AM detection output.
O
This is an AGC voltage input terminal
I
for AM
I
This is an output terminal of voltage
for FM-AFC.
AM RF signal input.
I
Register value between pin 26 and pin28
O
besides the frequency width of the
input signal.
I
This is a terminal of AM Local
oscillation circuit.
AM Local oscillation Signal output.
O
15
1-45
MX-G950V/MX-G880V
MX-G850V/MX-G750V
LC72136N (IC2) : PLL frequency synthesizer
1. Pin layout
FM/AM
CLOCK
FM/ST/VCO
AM/FM
2. Block diagram
XT
CE
DI
DO
SDIN
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
XT
GND
LPFOUT
LPFIN
PD
VCC
FMIN
AMIN
IFCONT
IFIN
1
22
16
15
3
4
5
6
17
21
3. Pin function
Pin
Symbol
No.
1
2
3
4
5
6
7
8
9
10
11
XT
FM/AM
CE
DI
CLOCK
DO
FM/ST/VCO
AM/FM
LW
MW
SDIN
Reference
Driver
Swallow Counter
1/2
C
2
B
I/F
Powe r
on
Reset
Function
I/O
X'tal oscillator connect (75kHz)
I
LOW:FM mode
O
When data output/input for 4pin(input) and
I
Swallow Counter
1/16,1/17 4bit
1/16,1/17 4bit
12bit
Programmable
DriverS
Data Shift Register & Latch
7821113
6pin(output): H
Input for receive the serial data from
I
controller
Sync signal input use
I
Data output for Controller
O
Output port
"Low": MW mode
O
Open state after the power on reset
O
Input/output port
I/O
Input/output port
I/O
Data input/output
I/O
Phase
Detector
Charge Pump
Unlock
Detector
Universal
Counter
Pin
Symbol
No.
12
IFCONT
13
14
15
16
17
18
19
LPFOUT
20
21
22
IFIN
AMIN
FMIN
VCC
PD
LPFIN
GND
XT
18
19
20
12
I/O
Function
IF counter signal input
I
IF signal output
O
Not use
-
AM Local OSC signal output
I
FM Local OSC signal input
I
Power suplly(VDD=4.5-5.5V)
-
When power ON:Reset circuit move
PLL charge pump output(H: Local OSC
O
frequency Height than Reference frequency.
L: Low Agreement: Height impedance)
Input for active lowpassfilter of PLL
I
Output for active lowpassfilter of PLL
O
Connected to GND
-
X'tal oscillator(75KHz)
I
1-46
MN662748RPMFA (IC701) : Digital servo & Digital signal processor
1. Terminal layout
80~61
1
60
MX-G950V/MX-G880V
MX-G850V/MX-G750V
20
21~40
2. Pin function
Pin
No
1 BCLK
2 LRCK
3 SRDATA
4 DVDDI
5 DVSSI
6TX
7 MCLK
8 M DATA
9 MLD
10 SENSE
11 FLOCK
12 TLOCK
13 BLKCK
14 SQCK
15 SUBQ
16 DMUTE
17 STAT
18 RST
19 SMCK
20 PMCK
21 TRV
22 TVD
23 PC
24 ECM
25 ECS
26 KICK
27 TRD
28 FOD
29 VREF
30 FBAL
31 TBAL
32 FE
33 TE
34 RFENV
35 VDET
36 OFT
37 TRCRS
38 /RFDET
39 BDO
40 LDON
41
Symbol Function
I/O I/O
-
Not use
-
Not use
-
Not use
-
Power supply for digital circuit
-
GND for digital circuit
-
Not use
I
Micro computer command
clock signal input
I
Micro computer command
data input
I
Micro computer command
load signal input (L: Load)
-
Not use, connect to TP716
-
Not use, connect to TP717
-
Not use, connect to TP718
O
Sub code block clock
signal output
I
External clock input for sub
code Q register input
O
Sub code Q data output
-
Not use, connect to TP719
O
Status signal input
I
Reset signal input (L: Reset)
-
Not use
-
Not use, connect to TP720
O
Traverse enforced output
O
Traverse drive output
-
Not used
O
Spindle motor drive signal
(Enforced mode output)
O
Spindle motor drive signal
(Servo error signal output)
O
Kick pulse output
O
Tracking drive output
O
Focus drive output
I
Reference voltage
for D/A output block
O
Focus balance adjust
signal output
O
Tracking balance adjust
signal output
I
Focus error signal input
(Analog input)
I
Tracking error signal input
(Analog input)
RF envelope signal input
I
(Analog input)
Vibration detect signal
I
input (H:Detect)
Off track signal input
I
(H:Off track)
Track cross signal input
I
RF detect signal input
I
(L:Detect)
Drop out signal input
I
(H:Drop out)
Laser on signal output
O
(H:ON)
Pin
No
41 PLLF2
42 TOFS
43 WVEL
44 ARF
45 IREF
46 DRF
47 DSLF
48 PLLF
49 VCOF
50 AVDD2
51 AVSS2
52 EFM
53 PCK
54 VCOF2
55 SUBC
56 SBCK
57 VSS
58 X1
59 X2
60 VDD
61 BYTCK/TRVSTP
62 CLDCK
63 FCLK
64 IPFLAG
65 FLAG
66 CLVS
67 CRC
68 DEMPH
69 RESY
70 IOSEL
71 /TEST
72 AVDD1
73 OUTL
74 AVSS1
75 OUTR
76 RSEL
77 CSEL
78 PSEL
79 MSEL
80 SSEL
Symbol Function
-
Not use
Not use
Not use
RF signal input
I
Reference current input
I
Bias pin for DSL
I
Loop filter pin for DSL
I/O
Loop filter pin for PLL
I/O
Loop filter pin for VCO
I/O
Power supply for analog
circuit
GND for analog circuit
Not use, connect to TP724
Clock output for PLL
O
Loop filter pin for Digital
I/O
servo VCO
Not use
Not use
GND for crystal oscillation
circuit
Input for crystal oscillation
I
circuit (f=16.9344MHz)
Output for crystal oscillation
O
circuit (f=16.9344MHz)
Power supply for crystal
oscillation circuit
Not use
Sub code frame clock
O
signal output
Not used
Interpolation flag signal
O
output, Connect to TP721
Flag signal output,
O
Connect to TP722
Not use
Not use
De-emphasis detect signal
O
output, Connect to TP723
Not use
Mode select pin, Connect
I
to DVDD1 (H fix)
Test pin, Connect to
I
DVDD1 (H fix)
Power supply for analog
circuit
L-channel audio output
O
GND for analog circuit
R-channel audio output
O
RF signal polarity setting pin,
I
Connect to DVDD1 (H fix)
Oscillation frequency setting
I
pin, Connect to GND (L fix)
IOSEL=H, Test pin,
I
Connect to GND (L fix)
IOSEL=H, SMCK output,
I
Frequency select pin
IOSEL=H, SMCK output,
I
SUBQ output mode select pin
1-47
MX-G950V/MX-G880V
MX-G850V/MX-G750V
LA6541-X (IC801) : Servo driver
1. Pin Layout & block diagram
Vcc Vref Vin4 Vg4 Vo8 Vo7
24 23
11k
ohm
22
21
20
19
Vcc
Gnd
Vo6 Vo5 Vg3 Vin3 Cd Res
18
17 16
- +
- +
Level
shift
Level
shift
11k
ohm
1
2
3456
Vcc Mute Vin1 Vg1 Vo1 Vo2 Vo3 Vo4 Vg2 Vin2 Reg
B T L
driver
B T L
driver
Gnd
B T L
driver
B T L
driver
7 8 9101112
Level
shift
Level
shift
2. Pin function
Pin
Symbol Function
No.
1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
2
3
4
5
6
7
8
9
Vcc
Mute
Vin1
Vg1
Vo1
Vo2
Vo3
Vo4
Vg2
Vin2
Reg Out
Reg In
Res
Cd
Vin3
Vg3
Vo5
Vo6
Vo7
Vo8
Vg4
Vin4
Vref
Vcc
Power supply (Shorted to pin 24)
All BTL amplifier outputs ON/OFF
BTL AMP 1 input pin
BTL AMP 1 input pin (For gain adjustment)
BTL AMP 1 input pin (Non inverting side)
BTL AMP 1 input pin (Inverting side)
BTL AMP 2 input pin (Inverting side)
BTL AMP 2 input pin (Non inverting side)
BTL AMP 2 input pin (For gain adjustment)
BTL AMP 2 input pin
External transistor collector (PNP) connection. 5V power supply output
External transistor (PNP) base connection
Reset output
Reset output delay time setting (Capacitor connected externally)
BTL AMP 3 input pin
BTL AMP 3 input pin (For gain adjustment)
BTL AMP 3 output pin (Non inverting side)
BTL AMP 3 output pin (Inverting side)
BTL AMP 4 output pin (Inverting side)
BTL AMP 4 output pin (Non inverting side)
BTL AMP 4 output pin (For gain adjustment)
BTL AMP 4 output pin
Level shift circuit's reference voltage application
Power supply (Shorted to pin 1)
15
14
11k
ohm
13
RESET
Regulator
11k
ohm
out
Reg
In
1-48
LB1641 (IC851, IC852) : DC motor driver
MX-G950V/MX-G880V
MX-G850V/MX-G750V
10
OUT2
2. Pin function
Input Output
IN1 IN2 OUT1 OUT2
0 0 0 0
1 0 1 0
0 1 0 1
1 1 0 0
COUNTER-CLOCKWISE
1. Pin layout
1 2 3 4 5 6 7 8 9
GND OUT1 P1
VZ IN1 IN2
VCC1
VCC2 P2
NJM4580D (IC481, IC501, IC502, IC526, IC571) : LPF, Mic and H. phone amp.
1.Terminal layout
A OUT
A -IN
A +IN
V
1
2
A
3
-
4
B
8
7
6
5
+
V
B OUT
B -IN
B +IN
Mode
Brake
CLOCKWISE
Brake
2.Block diagram
+
V
INPUT
+
-
V
(TOP VIEW)
OUTPUT
1-49
MX-G950V/MX-G880V
MX-G850V/MX-G750V
TDA7439 (IC303) : Control volume
1.Pin layout
1
SDA
2
CRE
3
Vs
4
AGND
5
ROUT
6
LOUT
7
R-IN4
8
R-IN3
9
R-IN2
10
R-IN1
11
L-IN1
12
L-IN2
13
L-IN3
14
L-IN4
MUXOUTL
15
2.Block diagram
TDA7439
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
CSL
DIG GND
TREBLE(R)
TREBLE(L)
MIN(L)
MOUT(L)
BOUT(L)
BIN(L)
BOUT(R)
BIN(R)
MOUT(R)
MIN(R)
INR
MUXOUTR
INL
L-IN1
L-IN2
L-IN3
L-IN4
R-IN1
R-IN2
R-IN3
R-IN4
11
12
13
14
10
MIN(L)
25
MIDLE
MOT(L)
23
G
0/30dB
2dB STEP
INL
MUXOUT
15 16 27
VOLUME
2
I C BUS DECODER LATCHES
TREBLE
TREBLE(L)
26
9
G
VOLUME
TREBLE
MIDLE
8
7
INPUT
MULTIPLEXER
GAIN
17
18
201928
BIN(L)
24
BASS
BASS
2221
BOUT(L)
SPEAKER
AT T
LEFT
SPEAKER
AT T
RIGHT
SUPPLY
2
6
30
SCL
1
SDA
29
DIG-GND
5
ROUT
3
Vs
4
AGND
LOUT
INR
CREF
MUXOUT
MIN(R)
TREBLE(R)
BIN(R)
MOUT(R)
BOUT(R)
TC7W08FU-X (IC107) : Nand gate
1. Pin layout & Block diagram 2. Truth table
1-50
1A
1B
2Y
GND
1
2
3
4
8
Vcc
7
1Y
6
2B
5
2A
A B Y
L
L
H
H
L
H
L
H
L
L
L
H
NJM4580L (IC901) : Dual operational amplifier
1.Terminal layout
1. A OUTPUT
A
-+
123 4 5678
B
+-
2. A -INPUT
3. A +INPUT
-
4. V
5. B +INPUT
6. B -INPUT
7. B OUTPUT
+
8. V
BR93LC66F-X (IC403) : EEPROM
1.Terminal layout
1
NC
CS
SK
2
3
4
VCC
8
NC
7
GND
6
DO
5
DI
2.Pin Functions
Symbol
VCC
GND
CS
SK
DI
DO
I/O
-
-
I
I
I
O
MX-G950V/MX-G880V
MX-G850V/MX-G750V
Function
Power supply
Connect to GND
Chip select input
Serial clock input
Start bit,OP-code,address,serial data input
Serial data output,
Internal state display output of READY/BUSY
BA3126N (IC31) : R / P switch
S W
R E C
G
123456789
S W
P / B
GP1U271X (IC701) : Receiver for remote
+
–
Amp.
Limiter Integrator Comparator
C O N T .
B.P.F
G N D
Demodulator
V c c
P / B
S W
G
S W
R E C
GND
VCC Vout
1-51
MX-G950V/MX-G880V
MX-G850V/MX-G750V
KIA7042AP-T (IC830) : Regulator
1.
Terminal
layout Block diagram2.
1 2 3
1.VCC
2.GND
3.OUT
RT9161 / A-27CG-X (IC105) : Regulator
1. Pin layout 2. Block diagram
VIN
123
GND VIN
(TAB)
VOUT
Reference
3. Pin function
Pin Name Function
VOUT
GND
VIN
Output Voltage
Ground
Power Input
TC7S08F-W (IC340) : Buffer
1. Pin layout 2. Block diagram
Error Amp
1.2V
VOUT
+
-
GND
Vcc
1-52
IN B
IN A
Vss
1
54VDD
A
Y
2
3
OUT X
B
GND
1
4
R1
TR1
TR3
TR2
TR4
TR5
TR6
TR8
R8
C2
TR14 TR15
TR16
R14
R11
R13
R12
R10
R9
TR9
TR10
TR12
TR13
TR11
TR7
C1
D1
R6
R3
R4
R5
R7
13
11
14
15
9
8
1256710
2
R2
SUB
STK402-030 (IC101) : Power amp
1.Pin layout
2.Block diagram
115
MX-G950V/MX-G880V
MX-G850V/MX-G750V
1-53
MX-G950V/MX-G880V
MX-G850V/MX-G750V
STK402-050 (IC602) : 2ch AF power amp.
Pin
layout
1.
1 ~ 15
2.Block diagram
4
R1
1
2
TR3
R2
8
TR7
TR4
C1
TR5
TR2TR1
D1
R3
R4
R5
R6
TR8
TR6
R7
TR9
TR10
R8
TR12
TR13
R9
R13
TR1E
C2
R15R14
R11
R12
R10
TR16
R14
9
1-54
SUB
151411106712513
STK412-010 (IC701) : 2ch AF power amp.
1.
Pin
layout
1 ~ 18
2.Block diagram
MX-G950V/MX-G880V
MX-G850V/MX-G750V
1813
TR41
17
R41
1
14
15
16
TR1 TR2
C1R1
TR5
R2
Comparator
Comparator
R51
D42
D53
D52
D43
SUB
3
2
7
5
4
6
TR18
R17
TR17
R13
TR16
R15
R14
R15
C12
D12
C11
R11
TR14 TR13
TR15
R12
TR11TR12
D41
D51
TR51
R3
D2
TR6
C2
R4
TR4TR3
R5
R6
D1
TR7
TR9
TR8
TR10
R7
TR19
TR20
12 9 8 11 10
1-55
MX-G950V/MX-G880V
MX-G850V/MX-G750V
STK412-090 (IC701) : 2ch AF power amp.
1.
Pin
layout
1 ~ 18
2.Block diagram
1813
TR41
17
R41
1
14
15
16
TR1 TR2
C1R1
TR5
R2
Comparator
Comparator
R51
D42
D53
D52
D43
SUB
3
2
7
5
4
6
TR18
R17
TR17
R13
TR16
R15
R14
R15
C12
D12
C11
R11
TR14 TR13
TR15
R12
TR11TR12
D41
D51
TR51
R3
D2
TR6
C2
R4
TR4TR3
R5
R6
D1
TR7
TR9
TR8
TR10
R7
TR19
TR20
12 9 8 11 10
1-56
< MEMO >
MX-G950V/MX-G880V
MX-G850V/MX-G750V
1-57
MX-G950V/MX-G880V
MX-G950V/MX-G880V
MX-G850V/MX-G750V
MX-G850V/MX-G750V
VICTOR COMPANY OF JAPAN, LIMITED
AUDIO & COMUNICATION BUSINESS DIVISION
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
1-58
(No.21099)
Printed in Japan
200207
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