JVC MX-G70 User manual

SERVICE MANUAL
No.20920
Mar. 2001
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
MX-G70
COMPACT COMPONENT SYSTEM
MX-G70 Area Suffix
J
CU.S.A. Canada
Safety precautions
Important for laser products
Warnings and Cautions
Preventing static electricity
Importance administering
point on the safety
Disassembly method
1-2
1-3
1-3
1-4
1-5
1-6
Adjustment method
Flow of functional operation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
1-26
1-30
1-31
1-31
1-32
Contents
PLAY&EXCHANGE
STANDBY/ON
CD-R / RW PLAYBACK
STANDBY
MX-G70
SP-MXG70
CA-MXG70SP-MXG70

MX-G70
1-2
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.).
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.
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
!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.

MX-G70
1-3
Important for laser products
Warnings and Cautions
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.
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.
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT REMOVE COVER (OR BACK).
NO USER SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
RISK OF ELECTRIC SHOCK
DO NOT OPEN
The lightning flash with arrowhead symbol,
within an equilateral triangle is intended to
alert the user to the presence of uninsulated
"dangerous voltage" within the product's
enclosure that may be of sufficient
magnitude to constitute a risk of electric
shock to persons.
The exclamation point within an equilateral
triangle is intended to alert the user to the
presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
CAUTION
For Canada/pour le Canada
CAUTION: TO PREVENT ELECTRIC SHOCK, MATCH WIDE
BLADE OF PLUG TO WIDE SLOT, FULLY INSERT.
ATTENTION: POUR EVITER LES CHOCS ELECTRIQUES,
INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS
LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER
JUSQUAU FOND.
WARNING: TO REDUCE THE RISK OF FIRE
OR ELECTRIC SHOCK, DO NOT EXPOSE
THIS APPLIANCE TO RAIN OR MOISTURE.

MX-G70
1-4
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.
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
Conductive material
(conductive sheet) or iron plate
(caption)
Anti-static wrist strap
Attention when traverse unit is decomposed
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.
*Please refer to "Disassembly method" in the text for pick-up and how to
detach the CD traverse mechanism.
Soldering
Fig.1
Fig.2
CD changer
mechanism
assembly
CD traverse
unit
Flexible cable

MX-G70
1-5
Caution: For continued protection against risk of
fire, replace only with same type 5A/125V for
F001, 6A/125V for F101 and F102.This symbol
specifies type of fast operating fuse.
Precaution: Pour eviter risques de feux, remplacez
le fusible de surete de F001 comme le meme type
que 5A/125V, et 6A/125V pour F101 et F102.
Ce sont des fusibles suretes qui functionnes rapide.
^
Importance administering point on the safety
F001 F101
F102

MX-G70
1-6
Remove the six screws Aon the back of the body.
Remove the two screws Bon both sides of the
body.
Remove the metal cover from the body by lifting the
rear part of the cover.
1.
2.
3.
Disassembly method
<Main body>
Removing the metal cover
(See Fig.1 to 3)
Do not break the front panel tab fitted to
the metal cover.
CAUTION: Fig.1
Fig.2
Fig.3
A
AA
Metal cover
Metal cover
B
Metal cover
B

MX-G70
1-7
Prior to performing the following procedure, remove
the metal cover.
Disconnect the card wire from connector CN661 on
the Main board.
Remove the two screws Con the upper side of the
body and the two screws Don the back of the rear
panel.
Remove the plastic rivet attaching the main board.
Remove the fan connector CN705.
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.
1.
2.
3.
4.
5.
Removing the CD changer mechanism
assembly (See Fig.4 and 5)
Prior to performing the following procedure, remove
the metal cover and CD changer mechanism
assembly.
Disconnect the card wires from connector CN870,
CN871 and CN315 on the main board respectively.
Remove the tie band and disconnect the wire from
connector CN703 on the amplifier board.
Disconnect the wire from connector CN220 on the
transformer board.
1.
2.
3.
Removing the front panel assembly
(See Fig.6 to 10)
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.
CAUTION:
Fig.4
Fig.5
Fig.6
Fig.7
Front panel assembly
C
C
CD changer
mechanism assembly
Rear panel
Main board
CN661
CD changer mechanism assembly
D
Main board
CN661
Front panel assembly
Plastic rivet
Tie band
Amplifier board
CN703 Main board
CN870
CN871
CN315
Transformer board
CN220
Front panel
assembly
Front panel assembly Main board
Rear panel

MX-G70
1-8
Remove the four screws Eon the bottom of the
body.
Release the two joints aon the lower right and left
sides of the body using a screwdriver, and remove
the front panel assembly toward the front.
4.
5.
Fig.8
Fig.9
Fig.10
E
(Bottom)
Front panel assembly
Joint a
Joint a
Front panel assembly
Front panel assembly

MX-G70
1-9
Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.
Disconnect the card wire from connector CN1 on the
tuner board on the right side of the body.
Remove the plastic rivet fixing the tuner board.
Remove the two screws Fon the back of the body.
1.
2.
3.
Removing the tuner board
(See Fig.11 and 12)
Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.
Remove the screw Gattaching the rear cover on the
back of the body.
Push each tab of the four joints bin the direction of
the arrow and release.
Remove the eleven screws Fattaching the rear
panel.
Release the joints con each lower side of the rear
panel using a screwdriver and remove the rear panel
backward.
1.
2.
3.
4.
Removing the rear cover / rear panel
(See Fig.12 to 15)
Note : Remove the tuner board in case of necessity.
(Refer to Fig.21)
Fig.11
Fig.12
Fig.13
Fig.14
Fig.15
CN1 Plastic rivet
Tuner board
Rear panel
Rear panel
G
F
Joint b
Joint b
Rear cover
Rear panel
F
F
FF
Joint c
Joint c Rear panel Rear panel

MX-G70
1-10
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly, the rear panel and the tuner board.
Disconnect the card wires from connector CN870,
CN871 and CN315 on the main board.
Disconnect the flat wires from connector CN704 and
CN706 on the amplifier board.
Remove the screw H attaching the main board on
the right side of the body.
Disconnect connector CN211 and CN212 on the
main board from the regulator board.
1.
2.
3.
4.
Removing the main board
(See Fig.16 and 17)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
Disconnect connector CN217 on the speaker board
from the regulator board.
1.
Removing the speaker board (See Fig.18)
It is not necessary to remove the main
board.
REFERENCE:
Fig.16
Fig.17
Fig.18
Front panel assembly
Amplifier board
CN704
CN706
Main board
CN870
CN871
CN315
Plastic rivet Main board
Front panel assembly
HCN211
CN212
Regulator board
Regulator board CN217
Speaker board

MX-G70
1-11
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
Disconnect the wires from connector CN703, CN704
and CN706 on the amplifier board respectively.
Remove the two tie band attaching the wire to the
amplifier board and the voltage board.
Disconnect connector CN215 on the amplifier board
and CN216 on the voltage board from the regulator
board (The heat sink and heat sink bracket will be
detached at once).
Pull out the upper and lower heat sink brackets from
the heat sink respectively.
Remove the four screws Iattaching the amplifier
board to the heat sink.
Remove the two screws J, the board bracket and
the voltage board.
1.
2.
3.
4.
5.
6.
Removing the amplifier board / voltage
board / heat sink (See Fig.19 and 20)
Fig.19
Fig.20
Amplifier board
CN704
CN706
CN216
Regulator board CN215
Tie band
Tie band
CN703
Voltage board
Amplifier board
Heat sink
Heat sink bracket
Heat sink bracket
Voltage board
I
I
J

MX-G70
1-12
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
Disconnect the wires from connector CN220 and
CN250 on the transformer board.
Disconnect the wire from connector CN204 on the
regulator board.
Remove the four screws kattaching the transformer
assembly.
1.
2.
3.
Removing the power transformer
assembly (See Fig.21 and 22)
Prior to performing the following procedure, remove
metal cover, CD changer mechanism assembly, rear
panel, tuner board, main board, amplifier board,
voltage board and speaker board.
Disconnect the wire from connector CN204 on the
regulator board.
Remove the two screws L attaching the regulator
board.
1.
2.
Removing the regulator board
(See Fig.23)
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear panel.
Disconnect the wire from connector CN250 on the
transformer board.
Remove the tie band from the voltage board.
Move the power cord stopper upward and pull out it
from the base chassis.
1.
2.
3.
Removing the power cord (See Fig.21)
Fig.21
Fig.22
Fig.23
Tie band
Voltage board
Transformer board
CN250
CN220
Power transformer assembly
Power cord stopper
Base chassis
Power cord
Power transformer
assembly
Power cord stopper
Tie band
Regulator board
CN204
Transformer board
CN220 K
K
CN250
L
L
Regulator board
CN204 Power transformer assembly

MX-G70
1-13
<Front panel assembly>
Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the front panel assembly.
Disconnect the card wire from connector CN306 on
the head amplifier & mechanism control board.
Remove the four screws M and three screws M'
attaching the cassette mechanism assembly.
1.
2.
Removing the cassette mechanism
assembly (See Fig.24)
Remove the five screws Nattaching the stay bracket.
Disconnect the card wires from connector CN316 and
CN880 on the display system control board.
Remove the seven screws O attaching the display
system control board.
If necessary, disconnect the wire from connector
CN911 on the front side of the display system control
board and unsolder FW915.
If necessary, remove the CD play board. (Fig. 28)
1.
2.
3.
4.
Removing the display system control
board (See Fig.25 to 27)
Remove the three screws Pattaching the CD eject
board.
If necessary, unsolder FW915 on the CD eject
board.
1.
2.
Removing the CD play board
(See Fig.27 and 28)
Fig.24
Fig.25
Fig.26
Fig.27Fig.28
Head amplifier
& Mechanism control board
CN306 M
M
M'
M'
M'
M
Cassette mechanism
assembly N
N
Display system control board Stay bracket
O
O
O
O
CN316
CN880
FW915
(Soldering) O
Display system control board
FW915
FW915
CD play board
CN911
Display system control board
CD play board
FW915
(Soldering)
P
P

MX-G70
1-14
Prior to performing the following procedure, remove
the display system control board.
Pull out the preset knob on the front panel.
Remove the five screws Qattaching the preset /
tuning switch board.
1.
2.
Removing the preset / tuning switch
board (See Fig.29 and 30)
Prior to performing the following procedure, remove
the display system control board and the preset /
tuning switch board.
Pull out the volume knob on the front panel and
remove the nut. Pull out the surround mode knob
and the surround woofer level knob toward the front.
Remove the twelve screws Rattaching the
operation switch board.
Release the wire clamp.
Remove the screw R' attaching the earth terminal
extending from the switch board.
Release each tab of the seven joints gretaining the
operation switch board.
1.
2.
3.
4.
Removing the operation switch board
(See Fig.30 and 31)
Fig.29
Fig.30
Fig.31
Preset / tuning switch board
Q
Q
Volume knob
Nut
Surround woofer
level knob
Surround mode knob
Preset knob
R
RR'
R
R
R
R
R
Joint g
Joint g Joint g
Wire clamp
Joints g
Joints g
Operation
switch board

MX-G70
1-15
Removing the CD Servo control board
(See Fig.1)
Removing the CD tray assembly
(See Fig.2~4)
1.
2.
3.
4.
5.
6.
7.
8.
9.
Remove the front panel assembly.
Remove the CD changer mechanism assembly.
Remove the CD Servo control board.
Remove the screw B' retaining the lod stopper.
From the T.bracket section "b" and clamper base
section "c" , remove both of the edges fixing the
rod(See Fig.2 and 3).
Remove the screw B retaining the disc stopper
(See Fig.3).
Remove the three screws Cretaining the T.bracket
(See Fig.3).
Remove the screw Dretaining the clamper assembly
(See Fig.3).
From the left side face of the chassis assembly, remove
the one screw Eretaining both of the return spring and
lock lever(See Fig. 4).
By removing the pawl at the section "d" fixing the return
spring, dismount the return spring(See Fig.4).
Remove the three lock levers(See Fig.4).
10.
11.
Fig.1
Fig.2
Fig.3 Fig.4
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 Aretaining 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.
CN601
CN801
b
c
E
Rod
T.Braket
Clamper base
T.Braket Disc stopper
Lod stopper
(C/J version only)
Clamper ass'y
b
a
CC
B'
D
C
d
Lock lever
Return spring
CD servo control board
CN651
CN854
aa
A
A
A
A
CN151
CN652
B
Earth
wire

MX-G70
1-16
11.
12.
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
shown in Fig.6 from to the second or fifth hole on the
left side face of the CD changer mechanism assembly.
Fig.5
Fig.7
Fig.6
Fig.8 Fig.9
[Caution] 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.
13.
14.
15.
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.
CD 3
CD 2
CD 1
CD tray
assembly
e
Drive unit of elevator
CD tray assembly
f
Refer to Fig.7 Pawl
Chassis assembly
Pulley gear
Motor pulley
Pawl ,
CD tray assembly
Stopper
g
gg'

MX-G70
1-17
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 Fretaining the CD loading
mechanism assembly.
Removing the CD traverse mechanism
(See Fig.11 and 12 )
1.
2.
For dismounting only the CD traverse mechanism
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
arrow direction "l", remove the assembly from the lifter
unit
Fig.10
Fig.12
Fig.11
Fig.13
Removing the CD pick unit
(See Fig.13 )
1.
2.
3.
4.
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
the center position.
While pressing the stopper retaining the shaft in the
arrow direction "o" , pull out the shaft in the arrow
direction "p".
After dismounting the shaft from the CD pickup unit,
remove the CD pickup unit
Cams R1, R2 assembly
i
CD loading mechanism assembly
h
F
F
FF
Arrow
Lifter unit
CD traverse mechanism
l
n
op
m
Arrow
Cam R1, R2 assembly
k
Arrow
j
CD Pickup unit
CD loading
mechanism
Shaft
Cam gear
Shaft
Shaft
Stopper Stopper

MX-G70
1-18
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.
Fig.15
Fig.14
Fig.16
Removing the cam unit
(See Fig.15 ~17 )
1.
2.
3.
4.
5.
Remove the CD loading mechanism assembly.
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).
While turning the cam gear "q", align the Paul "s"
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
gear "q" and cams R1/R2 assembly)(See Fig.18).
Cam gear q
Drive unit
r
G
H
J
H
Chassis assembly
Tray select
switch board
CN854
CN851
CN804
Cylinder gear
Drive unit
Fig.17
Select lever
Cams R1, R2 assembly
Cam unit
Cam gear q
s

MX-G70
1-19
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 Iretaining 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 "usection" 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-G70
1-20
Fig.22
[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).
Removing the cams R1/R2 assembly
and cam gear q(See Fig.22)
1.
2.
3.
4.
Remove the slit washer fixing the cams R1 and R2
assembly.
By removing the two pawls "w" fixing the cam R1,
separate R2 from R1.
Remove the slit washer fixing the cam gear "q".
Pull out the cam gear "q" from the C.G. base assembly.
Removing the C.G. base assembly
(See Fig.22 and 23)
Remove the three screws Jretaining the C.G. base
assembly.
Fig.23
Slit washer
Pawl
Cam R2
Slit washer
Cam gear q
Cam switch board
C.G. base assembly
Cam R1
Pawl
Cam gear q
Notch
Cylinder
gear
Gear bracket
Cam R1, R2 assembly
Gear unit
Drive unit
x
Pawl
w
w
J