JVC MX-J170V User manual

SERVICE MANUAL
COMPACT COMPONENT SYSTEM
No.20859
Nov. 2000
COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.
MX-J170V
Area Suffix
US
USingapore Other Areas
Safety precautions
Important for laser products
Preventing static electricity
Disassembly method
Adjustment method
1-2
1-3
1-4
1-5
1-21
Flow of functional operation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
1-25
1-26
1-26
1-27
Contents
OPEN / CLOSE
STANDBY
DISC CHANGE
VOLUME
PLAY REC/PLAY
CD SYNCHRO RECORDING
EJECTEJECT
PROGRAM/SET
COUNTER
RESET ACTIVE
BASS EX. SOUND
MODE
CLOCK
/TIMER
NTSC/PAL
AUX FM/AM
- VCD NUMBER
PRESET
VCD NUMBER +
CD TAPE
TAPEA/B CD REC
START
A B
DUBBING
REC/PAUSE
CD 1
CD 2
CD 3
+
–
PLAY& EXCHANGER
MIC LEVEL
DEMO
PHONES
FULL-LOGIC CONTROL
MIN MAX
MIC
NTSC/PAL COMPATIBILITY
COMPACT
DIGITALVIDEO
VIDEO CD
SELECT
PREV NEXT
KEY
CONTROL
ECHO
MPX
/V.REPLACE
/V.MASKING
CD
SLEEP TIMER
ON/OFF
DECKA/B TUNING MODE FM MODE
VOLUME
PREV
+
–
RM–SMXJ170V REMOTE CONTROL
TAPE
DISC SKIP
FM/AM AUX CD
FADEMUTING
SELECT
NEXT
VOLUME
+
–
VCD
NUMBER
KEY CONTROL
PBC
(MENU)
NTSC/PALSLOW SINGLE STEP
V.MASKING
ECHO
REPEAT
PROGRAM/SET BASS SOUND MODE
0
7
VIDEO CD
PlayBack
Control
MX-J170V

MX-J170V
1-2
Safety Precautions
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 current 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 measure 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.).
Warning
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
!
CAUTION
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-J170V
1-3
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
laserradiation and is equipped with safety switches
whichprevent emission of radiation when the drawer is
open and the safety interlocks have failed or are de
feated. 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.
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.
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
DANGER : Invisibie laser radiation
when open and interlock or
defeated.
AVOID DIRECT EXPOSURE TO
BEAM (e)
VARNING : Osynlig laserstrålning är
denna del är öppnad och spårren är
urkopplad. Betrakta ej strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettaessa olet alttiina
näkymättömälle lasersäteilylle.Älä
katso säteeseen. (d)
ADVARSEL :Usynlig laserstråling
ved åbning , når
sikkerhedsafbrydere er ude af
funktion. Undgå udsættelse for
stråling. (f)
CLASS 1
LASER PRODUCT
!
CAUTION
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.

MX-J170V
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 CD mechanism assembly is decomposed
1. Remove the CD changer unit.
2. Remove the CD changer mechanism.
3. Solder is put up before the card wire is removed from the pickup unit
connector on the CD mechanism assembly.
(When the card wire is removed without putting up solder, the CD pick-up
assembly might destroy.)
4. Please remove solder after connecting the card wire with the pickup unit
connector 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 mechanism assembly.
Soldering
Fig.1
Fig.2
Card wire
Card wire
Pickup unit
connector
Pickup unit
connector
CD changer unit
CD mechanism

MX-J170V
1-5
Remove the five screws Aon the back of the body
and the both sides of the body.
Remove the top cover upward from behind.
Remove the eight screws Battaching the side
covers on the back of the body and the both side of
the body.
Slide the right and left covers backward and unhook
the two hooks ain the lower part of the side covers
as shown in Fig.2-2.
1.
2.
3.
4.
<Main body>
Removing the top cover and the side
covers (See Fig.1 to 3)
Disassembly method
Fig.1
Fig.2Fig.2-2
Fig.3
Top cover
A
AA
BB
Side cover (L) Side cover (R)
Side cover (R)
A
B
B
B
Top cover
Hooks a
Top cover
Hooks a
A
B
B
BSide cover (L)
Hook
Hook

MX-J170V
1-6
Prior to performing the following procedure, remove
the top cover and the side covers.
Press the POWER button. Press the OPEN/CLOSE
button to eject the CD tray.
Move the CD tray fitting upward and release the joint
b.
Press the OPEN/CLOSE button to insert the CD tray.
1.
2.
3.
Removing the CD Tray fitting
(See Fig. 4 to 6)
Be sure to remove the CD tray fitting
before removing the CD changer unit.
ATTENTION:
Fig.4
Fig.5
Fig.6
POWER button OPEN/CLOSE button
CD tray
Joint b
Joint b
CD tray fitting
CD tray

MX-J170V
1-7
Prior to performing the following procedure, remove
the top cover and the side covers.
Disconnect the harness from connector PCON1 of
the VCD board.
Remove the four screws Wattaching the sealed and
VCD board.
Turn the black loading pulley gear marked cfrom the
back of the CD changer unit as shown in Fig.8 and
draw the CD tray toward the front.
Move the CD tray fitting upward and release the joint
b.
Push and insert the CD tray manually.
1.
2.
3.
4.
5.
Removing the CD Tray fitting & the VCD
board (See Fig.7 to 10)
Be sure to remove the CD tray fitting
before removing the CD changer unit.
ATTENTION:
- How to eject the CD tray without turning on power -
Fig.9 Fig.10
Joint b
Joint b
CD tray fitting CD tray
Fig.7
Fig.8
WVCD board
Sealed
PCON1
Marked c
Loading pulley gear

MX-J170V
1-8
Prior to performing the following procedure, remove
the top cover, the side covers and the CD Tray
fitting.
Disconnect the card wire from connector SCW1 of
the CD servo board on the back of the CD changer
unit.
Disconnect the harness from connector FW2 on the
inner side of the main board in the body.
Disconnect the harness from connector VCW2 on
the VDC power board .
Remove the two screws Cattaching the CD changer
unit on the back of the body.
Draw the CD changer unit upward from behind while
pulling the rear panel outward.
1.
2.
3.
4.
5.
Removing the CD changer unit
(See Fig.11 to 13)
Fig.11
Fig.12
Fig.13
SCW1
CD servo boardCD changer unit
Main board FW2
Rear panel
C
Rear panel
Front panel assembly
CD changer unit
VCW2
VCD power board
VCD power board

MX-J170V
1-9
Prior to performing the following procedure, remove
the top cover, the side covers, the CD Tray fitting
and the CD changer unit.
There is no need to remove the rear panel.
Disconnect the harness from head wire connector
ECW1,DW1 and DW2 on the inner side of the main
board in the body.
Disconnect the harness from connector HCW1 of the
headphone board on the right side of the body.
Remove the three screws Dattaching the front panel
assembly on both sides of the body.
Remove the screw Eattaching the earth terminal
extending from the front compartment.
Remove the screw Fattaching the front panel
assembly on the bottom of the body.
Release the two joints don both sides and two joints
eon the bottom of the body using a screwdriver. At
the same time, disconnect the front compartment
from connector CCW1 and CCW2 of the main board.
1.
2.
3.
4.
5.
Removing the front panel assembly
(See Fig.14 to 16)
Fig.14
Fig.15
Fig.16
Main board
DW2
DW1
CCW1
CCW2
Front panel assembly
Joint d
earth wire
DE
Front panel assembly
D
D
Main board
MIC
/Headphone board
HCW1
FJoint e
Joint e
Joint d
ECW1

MX-J170V
1-10
Prior to performing the following procedure, remove
the top cover, the side covers, the CD Tray fitting
and the CD changer unit.
There is no need to remove the front panel
assembly.
Remove the ten screws Gattaching the main board,
the tuner board and the heat sink to the rear panel
on the back of the body.
Remove the three screws Hattaching the VCD
power board to the rear panel on the back of the
body.
Remove the four screws Iattaching the rear panel on
the back of the body.
1.
2.
3.
Removing the rear panel (See Fig.17)
Prior to performing the following procedure, remove
the rear panel.
Disconnect the harness from connector HCW1 of the
MIC/headphone board on the right side of the body.
Release the harness from the clamp in the body.
Disconnect the harness from head wire connector
ECW1,DW1 and DW2 extending to the main board
in the body.
Disconnect the harness from connector RCW1 of the
power transformer.
Remove the screws Dattaching the front panel
assembly on both sides of the body.
Remove the screw Jattaching the earth terminal to
the base chassis.
Disconnect connector CCW1 and CCW2 connected
to the main board.
1.
2.
3.
4.
5.
6.
Removing the main board
(See Fig.18 and 19)
Fig.17
Fig.18
Fig.19
G
Rear panel
G
G
I
H
Front panel assembly
Main board
MIC/
headphone board
HCW1
Main board
Heat sink
Tuner board
DW2
DW1
CCW2
CCW1
Power transformer
RCW1
J
Clamp
G
ECW1
D
VCD board

MX-J170V
1-11
Prior to performing the following procedure, remove
the main board.
Disconnect the harness from connector MJW1 of the
main board.
Remove the three screws Kattaching the heat sink
cover plate and cooling fan.
Remove the two screws Lattaching the power IC to
the heat sink and the three screws Mattaching the
heat sink to the main board.
1.
2.
3.
Removing the heat sink & cooling fan
(See Fig.20 and 21)
The tuner board can be removed even if the main
board is attached.
Release the joint tab fof the tuner board holder and
the main board, and disconnect connector FW1
connected to the main board. Remove the tuner
board assembly (Refer to Fig.21).
Remove the screw Nattaching the tuner board
holder. Release the two tabs goutward and remove
the tuner board from the tuner board holder.
1.
2.
Removing the tuner Board
(See Fig.21 to 23)
Fig.23
Fig.22
Fig.21
Fig.20
K
L
Main board
Joint tab f
Tuner board
M
Heat sink
Tuner board
Main board
TWA1
Tuner board Tab g
Tab g
Tuner board holder
Heat sink cover plate
Heat sink cover plate
N
Cooling Fan
TWA1
MJW1

MX-J170V
1-12
Prior to performing the following procedure, remove
the top cover and the side covers.
Remove the two screws Oattaching the heat sink
plate.
Remove the two screws Pattaching the power IC to
the heat sink and the two screws Qattaching the
heat sink to the VCD Power board.
1.
2.
Removing the heat sink & VCD Power
board (See Fig.24 and 25)
Prior to performing the following procedure, remove
the VCD Power board.
Disconnect the power cord from connector RCW2 of
the power transformer.
Disconnect the harness from connector RCW1 of the
power transformer.
Remove the four screws Rattaching the power
transformer.
1.
2.
3.
Removing the power transformer
(See Fig.26)
Prior to disconnecting the power cord
from the body, remove the rear panel.
ATTENTION:
Fig.26
Fig.25
Fig.24
P
O
VCD Power board
Q
R
R
Power cord
RCW2
RCW1
Power transformer
Heat sink
Heat sink
P
O
Q
VCD Power board

MX-J170V
1-13
Prior to performing the following procedure, remove
the power / CD switch board.
Pull out the volume knob toward the front.
Disconnect the card wire from the mechanism board
of the cassette mechanism assembly.
Remove the nine screws Tattaching the front board.
1.
2.
3.
Removing the front board
(See Fig.27 and 28)
Remove the three screws Sattaching the power/CD
switch board and release the three tabs houtward.
Disconnect the harness from connector UCW9 of
the power / CD switch board.
1.
2.
Prior to performing the following procedure, remove
the top cover, the side covers, the CD tray fitting and
the front panel assembly.
Removing the power / CD switch board
(See Fig.27)
Disconnect the card wire from the mechanism board
of the cassette mechanism assembly.
Remove the seven screws Vattaching the cassette
mechanism assembly.
1.
2.
Removing the cassette mechanism
assembly (See Fig.30)
<Front panel assembly>
Pull out the MIC level knob toward you.
Remove the two screws Uattaching the
MIC/headphone board.
1.
2.
Removing the MIC/headphone board
(See Fig.28 and 29)
Prior to performing the following procedure, remove
the front board.
Fig.27
Fig.28
Fig.29
Fig.30
Tab hPower / CD
switch board
S
T
MIC/
headphone
board
Tab hTab h
Cassette mechanism assembly
JW1
S
T
T
T
TT
Front board
Mechanism board
Front panel assembly Volume knob
MIC/headphone board
U
Cassette mechanism assembly
Mechanism board V
V
VV
UCW9
MIC level knob

MX-J170V
1-14
Disconnect the harness from connector PCON1 of
the VCD board .
Remove the four screws Wattaching the Sealed and
VCD board.
1.
2.
Prior to performing the following procedure, remove
the CD changer unit.
Removing the VCD board (See Fig.31)
<CD changer unit>
Turn the black loading pulley gear marked con the
under side of the CD changer unit in the direction of
the arrow and draw the CD tray toward the front until
it stops.
Disconnect the card wire from connector SCW5 of
the CD servo board on the upper side of the CD
changer unit.
Push down the two tray stoppers marked iand pull
out the CD tray.
1.
2.
3.
Removing the CD tray (See Fig.32 to 34)
Fig.32
Fig.31
Fig.33
Loading pulley gear marked cCD tray
CD tray
CD tray
CD servo board
SCW5
Tray stopper marked i
Tray stopper marked i
Fig.34
W
W
PCON1
Shield VCD board

MX-J170V
1-15
Prior to performing the following procedure, remove
the CD tray.
Release the two tabs jattaching the sensor board on
the under side of the CD tray.
Disconnect the harness from connector CW1 on the
sensor board and release the harness from the two
hooks k. Remove the sensor board.
Remove the screw Xattaching the tray turn table.
Detach the tray turn table from the tray.
Pull outward the tab mattaching the tray turn table
motor assembly on the upper side of the tray and
detach the tray turn table motor assembly from the
tray.
1.
2.
3.
4.
Removing the sensor board / the tray
motor (See Fig.37 to 39)
Align the gear-cam with the gear-tray as shown
fig.28, then mount the CD tray.
When assembling the CD tray, take extreme care not
engage with gear - synchro.
1.
2.
Reinstall the CD tray (See Fig.35 and 36)
Fig.35
Gear-convert
Gear-convert
Gear-cam
Gear-tray
Gear-tray
Gear-tray
Gear-cam
timing point
Fig.36
Gear-synchro
CD tray
Fig.38
Fig.37
Fig.39
Tab j
Tab j
Hooks kSensor board
CW1
Tray turn table
Tray X
Tray turn table motor
assembly
Tab m

MX-J170V
1-16
Prior to performing the following procedure, remove
the CD tray.
Detach the belt from the pulley on the upper side of
the CD changer unit (Do not stain the belt with
grease).
Disconnect the card wire from the pickup unit
connector on the under side of the CD changer unit.
Disconnect the motor wire harness from connector
on the CD mechanism board.
Remove the two screws Yattaching the CD servo
board. First release the nside of the two tabs nand
two tabs oattaching the CD servo board motor to
raise the CD servo board slightly, then release the o
side.
If the tabs nand oare hard to release, it is
recommendable to unsolder the two soldered parts
on the motor terminal of the CD servo board.
Disconnect the terminal CW3 connected to the
switch board and remove the CD servo board.
Remove the screw Zattaching the CD Changer unit
and release the three tabs pattaching the switch
board outward and detach the switch board.
1.
2.
3.
4.
5.
Removing the belt, the CD servo board
and the switch board (See Fig.40 and 41)
Z
Fig.41
Fig.40
Belt
CD changer unit
YCD servo board
Tabs o
Tabs n
Soldered parts
Motor
Switch board CW3
Tabs p
CD mechanism board
motor connecter
Pickup unit connector

MX-J170V
1-17
Disconnect the harness from connector on the CD
mechanism board in the CD mechanism assembly
on the under side of the CD changer unit. Disconnect
the card wire from the pickup unit connector.
Remove the screw Aattaching the shaft on the right
side of the CD mechanism holder assembly. Pull
outward the stopper fixing the shaft on the left side
and remove the CD mechanism holder assembly
from behind in the direction of the arrow.
Turn the CD mechanism holder assembly half
around the lift up slide shaft rof the CD mechanism
holder assembly until the turn table is reversed, and
pull out the CD mechanism holder assembly.
1.
2.
3.
Removing the CD mechanism holder
assembly (mechanism included)
(See Fig.42 to 45)
Fig.42
Fig.43
Fig.45
Fig.44
Motor connecter
CD mechanism assembly
CD changer unit
Pickup unit connector
A
CD mechanism holder assembly Stopper
CD mechanism holder assembly
Lift up slide shaft r
Lift up slide shaft
CD mechanism holder assembly

MX-J170V
1-18
Fig.3
Fig.4Fig.5
Fig.1
Fig.2
Unsolder
c
Screw
Screw
Spindle motor
Turn table
BChassis
W
<CD mechanism section>
•
Removing the CD mechanism holder from the CD
chassis to remove the CD mechanism.
(Refer to "Removing the CD mechanism holder
assembly" (Pag.2-11))
Removing the pickup unit.
1. Loosen the two screws Afixing the chassis.(Fig.1)
2. Removing the feed gear stopper c on the
bottom of the mechanism and pull out the gear.
(Fig.1, Fig.3, Fig.4)
3. Pull out the shaft by opening the pickup shaft
stopper outward to unlock.(Fig.1, Fig.2)
4. Removing the pickup unit.(Fig.1)
Removing the feed motor.
Remove the two motor fixing screws at Band
removing the feed motor.(Fig.1, Fig.3)
Removing the spindle motor.
The spindle motor cannot be removed as a single unit.
When removing the spindle motor, change the chassis
and turntable together as aunit.(Fig.5)
A
AB
Stopper
Shaft
Stopper
Shaft
Feed Gear
Shutter
Pickup unit
Motor board Unsolder c
Feed motor
Spindle motor
Removing the motor board.
1. Unsolder the motor terminal on the motor board.(Fig.3)
2. Remove the motor board.(Fig.3)
(Feed gear stopper)

MX-J170V
1-19
<Cassette mechanism section>
•Removing the record/playback mechanism.
Removing the R/P head.
1. Remove the screw Aon the right side of the
R/P head.(Fig.1, Fig.2)
2. Remove the screw Bon the left side of the
R/P head.(Fig.1, Fig.2)
Remove the erase head.
Remove the screw Cfixing the erase head.(Fig.1)
Removing the pinch roller.
1. Pull out the pinch roller by opening the pinch
roller stopper outward to unlock .(Fig.3)
2. When reassembling the pinch roller, refer to
fig. 4 to hook up the spring.
Fig.1
Fig.2
Fig.3
Fig.4
R/P Head
R/P Head
E. Head
Spring
Stopper
Pinch roller
assembly
A
A
B
B
C
Pinch roller Pinch roller
stopper
Pinch roller Pinch roller spring
Return spring
Return spring
Return spring

MX-J170V
1-20
Fig.5
Drive belt
Drive belt
Drive belt
D
D
EE
abb
a
Motor
Motor
terminal
Motor
c
d
FR belt
FR belt
Washer
Capstan
washer
Flywheel
Flywheel
Flywheel
Capstan
washer
Mecha.
board
Fig.6
Fig.7
Fig.8Fig.9
Sleeve
Sleeve
Removing the motor.
1. Remove the two screws Dfixing the motor.
Be careful to grease's splash when the
drive belt comes off.(Fig.5, Fig.6)
2. Unsolder the motor terminal.(Fig.5)
Removing the mechanism board.
1. Unsolder the four parts aon the solenoid
coil terminal.(Fig.5)
2. Remove the two screws Efixing the board.(Fig.5)
3. Unhook the three parts bfrom the board.(Fig.5)
4. Remove the mechanism board.(Fig.5)
Removing the flywheel.
Remove the cut-washers at c and dfrom the
capstan shaft, then remove the flywheel.
When reassembling the flywheel,
be sure to use new washers as they
cannot be reused.(Fig.8, Fig.9)