Safety Precautions
Preventing static electricity
Important for laser products
Disassembly method
Wiring connection
Adjustment method
STANDB
Y
ACTIVE BASS EXT ENSION
AUX
PHONES
STANDBY/ON
FM
/AM
EPEAT
R
REC STAR
1-2
1-3
1-4
1-5
1-18
1-19
MX-K50
CD
T
APE
TAPE BTAPE
A
PROGRAMRANDO
M
T
C
D REC
DUBBING
/STO
P
START
COMPU PLAY CONTROL
FULL - LOGIC CONTROL
CA-MXK50
DISC CHANGE
CD 2
CD 1
CD 3
3
CD
CLOCK
/TIMER
DISPLAY
TUNING
ACTIVE BA
E
X. LEVE
CD SYNCHRO RECORDING
CD-R/RW PLAYBACK
SOUND
M
ODE
SS
L
SP-MXK50
Flow of functional operation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Trouble shooting
Description of major ICs
1-23
1-24
1-24
1-25
1-28~43
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
No.21121
Nov. 2002
Page 2
MX-K50
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 circuitr y 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 par ts 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 m ust 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 pr inted 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
Page 3
Preventing static electricity
MX-K50
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 CD mechanism assembly is decomposed
*Please refer to "Disassembly method" in the text for pick-up and how to
detach the CD mechanism assembly.
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.
Card wire
Picup unit
connector
Soldering
Fig.2
CD changer unit
Fig.1
Card wire
Picup unit
connector
CD changer
mechanism
1-3
Page 4
MX-K50
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 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.
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
Position of labels
CLASS 1
LASER PRODUCT
WARNING LABEL
1-4
Page 5
MX-K50
Disassembly method
Removing the metal cover (See Fig.1)
1.
Remove the three screws A attaching the metal
cover on the back of the body.
2.
Remove the six screws B attaching the metal cover
on both sides of the body.
3.
Remove the metal cover from the body by lifting the
rear part of the cover.
ONE POINT
How to eject the CD tray (see fig.2)
Although it will end if the OPEN/CLOSE
button is pushed when a power supply can
be taken, when that is not right, CD tray will
be opened manually.
Turn the loading pulley gear at the bottom of
the CD changer unit as shown in Fig.2 and
draw the CD tray toward the front.
Metal cover
A
B
(both sides)
Fig.1
Loading pulley gear
(See <CD changer unit>fig.1)
Removing the CD tray fitting
(See Fig. 3)
Prior to performing the following procedure, eject the
CD tray.
After drawing the lower part of the tray fitting toward
1.
the front, remove the five claws. Then, while moving
the tray fitting upward, remove it.
Removing the CD changer unit
(See Fig.4 to 7)
Prior to performing the following procedure, remove
the metal cover and CD tray fitting.
1.
Remove the card wire attached to CD changer unit
on the adhesion tape.
2.
Disconnect the card wire from the connector CW105
on the CD board.
3.
Disconnect the harness from the connector RCW6
on the main board.
4.
Remove the two screws C attaching the CD changer
unit to the rear panel.
Fig.2
Joint
CD tray fitting
Claw
Fig.3
Card wire
CD changer unit
5.
Remove the two screws D attaching the CD changer
unit to both sides of the front panel assembly.
6.
Draw the CD changer unit upward from behind while
pulling the rear panel outward.
Adhesion tape
Fig.4
1-5
Page 6
MX-K50
CW105
Fig.5
CD board
CD changer unit
Main board
RCW6
Front panel
assembly
D
(both sides)
C
Rear panel
Fig.6
CD changer unit
Rear panel
Fig.7
Removing the front panel assembly
(See Fig.8 to 10)
Prior to performing the following procedure, remove
the metal cover and CD changer unit.
1.
Disconnect the card wire from the connector FCW3
on the main board.
2.
Disconnect the harness from the connector ECW1,
JCW1, JCW2 and HCW3 on the main board.
3.
Remove the screw E attaching the earth terminal
extending from the cassette mechanism assembly.
4.
Remove the two screws F attaching the front panel
assembly to both sides of the body.
5.
Remove the screw G attaching the main board to the
front panel assembly.
6.
Remove the screw H attaching the front panel
assembly to bottom of the body.
7.
Release the two joints1 and two joints2, and detach
the front panel assembly toward the front.
Front panel
assembly
Joint1
(both sides)
(both sides)
FCW3
F
Main board
JCW2
ECW1
JCW1
HCW3
E
(fixing the earth wire)
Fig.8
Main board
ACW1
ACW2
Amp. board
Front panel
assembly
G
1-6
Fig.9
Joint1
(both sides)
F
(both sides)
Page 7
MX-K50
Removing the heat sink & amp. board
(See Fig.8, 11 and 12)
Prior to performing the following procedure, remove
the metal cover and CD changer unit.
1.
Disconnect the card wire from the connector ACW1
and the harness from the connector ACW2 on the
amp. board.
2.
Remove the four screws I attaching the heat sink
cover to the rear panel. Remove the heat sink cover.
3.
Remove the four screws J attaching the heat sink
and two screws K attaching the speaker terminal to
the rear panel.
4.
After moving the heat sink upward, remove the
claws. Then pull out the heat sink & amp. board
inward.
H
Heat sink
cover
Joint2
Fig.10
(Bottom side)
Rear panel
I
I
Removing the tuner board
(See Fig.12 and 13)
Prior to performing the following procedure, remove
the metal cover.
1.
Disconnect the card wire from the connector CON01
on the tuner board.
2.
Remove the two screws L attaching the tuner board
to the rear panel.
Removing the rear panel (See Fig.12)
Prior to performing the following procedure, remove
the metal cover, CD changer unit, heat sink & amp.
board and tuner board.
1.
Remove the screw M, screw N and three screws O
attaching the rear panel.
J
Claws
Heat sink
J
O
Main board
Fig.11
Fig.12
CON01
Rear panel
L
M
K
Speaker
terminal
N
Rear panel
Tuner board
Fig.13
1-7
Page 8
MX-K50
Removing the main board (See Fig. 14)
Prior to performing the following procedure, remove
the metal cover, CD changer unit and rear panel.
1.
Disconnect the card wire from the connector FCW3
and the harness from the connector ECW1, JCW1,
JCW2 and HCW3 on the main board.
2.
Disconnect the harness from the connector PCW1
on the fuse board.
3.
Remove the screw G attaching the main board to the
front panel assembly. (See Fig.9)
4.
Remove the two screws P attaching the heat sink to
the bottom chassis.
5.
Pull out the voice board, if needed.
Removing the power cord (See Fig. 14)
Prior to performing the following procedure, remove
the metal cover, CD changer unit and rear panel.
1.
Disconnect the power cord from the connector
RCW2 on the trans. board and pull up the power
cord stopper upward.
ECW1
HCW3
Fuse board
PCW1
Trans. board
RCW2
Power cord
Power cord
stopper
Bottom chassis
Power IC solder point
FCW3
JCW2
JCW1
Main board
Voice board
Heat sink
P
Fig.14
Heat sink
Amp. board
(reverse side)
Removing the power IC
(See Fig.15 and 16)
Prior to performing the following procedure, remove
the metal cover, CD changer unit and heat sink &
amp. board.
1.
Unsolder the power IC solder point.
2.
Remove the two screws Q attaching the power IC to
the heat sink.
Removing the power transformer
(See Fig .17)
Prior to performing the following procedure, remove
the metal cover, CD changer unit and heat sink &
amp. board.
1.
Remove the screw N attaching the trans. board to the
rear panel (see fig.12).
2.
Disconnect the power cord from the connector RCW2
on the trans. board.
R
Fig.15
Q
Fig.16
Power transformer
Heat sink
Amp. board
Fuse board
PCW1
Trans. board
3.
Disconnect the harness from the connector PCW1 on
the fuse board.
4.
Remove the four screws R attaching the power
transformer on the bottom chassis.
1-8
Bottom chassis
RCW2
Fig.17
Page 9
MX-K50
<Front panel assembly>
Prior to performing the following procedure, remove
the front panel assembly.
Removing the CD switch board (See Fig.1)
1.
Disconnect the card wire from the connector UCW1
on the CD switch board.
2.
Remove the five screws A attaching the CD switch
board.
Removing the front board (See Fig.1)
1.
Disconnect the card wire from the connector UCW3,
UCW4, UCW5 and UCW6 on the front board.
2.
Remove the six screws B attaching the front board.
3.
Disconnect the card wire from the connector UCW2
on the front board.
Removing the headphone jack board
(See Fig.3)
Prior to performing the following procedure remove
the front board.
1.
You can pull out the headphone jack board.
Removing the front key board with mic
board (See Fig.2 and 3)
Prior to performing the following procedure, remove
the front board.
B
UCW2
UCW3
B
UCW4
Front panel assembly (inner side)
A
CD switch board
UCW1
Front board
UCW5
UCW6
Fig.1
Sound mode knob
Volume knob
Mic level knob
Active bass ex. level knob
Pull out the sound mode knob, volume knob, active
1.
bass ex. level knob and mic level knob from front
side.
Remove the twelve screws C attaching the front key
2.
board.
Remove the front board releasing the two tabs1.
3.
Remove the mic board releasing the two tabs2.
4.
Disconnect the card wire from the connector UCW7
5.
on the front key board, if needed.
Mic board
Tab2
Removing the cassette mechanism
assembly (See Fig.3)
1.
Disconnect the card wire from the connector on the
mecha. board.
2.
Remove the six screws D attaching the cassette
mechanism assembly.
C
UCW7
Tab1
Tab1
D
Mecha.
board
D
(fixing the earth wire)
Fig.2
Front panel assembly (inner side)
Front key board
Cassette mechanism
Connector
Fig.3
C
Headphone
jack board
D
assembly
1-9
Page 10
MX-K50
<CD changer unit>
Prior to performing the following procedure, remove
the CD changer unit.
Removing the CD tray (See Fig.1 and 2)
1.
Turn the black loading pulley gear on 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.
2.
Disconnect the card wire from connector CW103 on
the CD board.
3.
Push down the two tray stoppers marked a and pull
out the CD tray.
Loading pulley
gear
CD changer uint (reverse side)
CD tray
CD board
CW103
Fig.1
a (Tray stopper)
Reinstall the CD tray (See Fig.3 and 4)
1.
Align the gear-cam with the gear-tray as shown fig.3,
then mount the CD tray.
2.
When assembling the CD tray, take extreme care not
engage with gear - synchro.
Gear-cam
Gear-convert
Gear-cam
timing point
CD tray
a
(Tray stopper)
CW103
(on the CD board)
Fig.2
Gear-tray
Gear-synchro
Gear-convert
1-10
Gear-tray
CD tray
Gear-tray
Fig.3Fig.4
Page 11
MX-K50
Removing the sensor board (See Fig.5)
Prior to performing the following procedure, remove
the CD tray.
1.
Remove the screw A attaching the sensor board on
the CD tray.
2.
Remove the sensor board releasing the two tabs a.
3.
Disconnect the harness from the connector CW1 on
the sensor board.
Removing the turn tray motor
(See Fig.6 and 7)
Prior to performing the following procedure, remove
the CD tray and sensor board.
1.
Remove the screw B attaching the turn tray. Detach
the turn tray from the base tray.
2.
Pull outward the tab b attaching the turn tray motor
on the base tray and detach the turn tray motor.
CD tray (reverse side)
A
CW1
Tab a
Sensor board
Fig.5
Turn tray
Introductory notes:
Base tray + Turn tray = CD tray
Base tray
B
Fig.6
Turn tray motor
Base tray (upper side)
Tab b
Fig.7
1-11
Page 12
MX-K50
Removing the belt, the CD board and the
switch board (See Fig.8 and 9)
Prior to performing the following procedure, remove
the CD tray.
1.
Detach the belt from the pulley on the upper side of
the CD changer unit (Do not stain the belt with
grease).
2.
Disconnect the card wire from the pickup unit
connector on the under side of the CD changer unit.
Attention : Solder is put up before the card wire is
removed from the pick-up unit
connector on the CD mechanism
assembly.
(When the card wire is removed without
putting up solder, the CD pick-up unit
assembly might destroy.)
3.
Disconnect the motor wire harness from connector
on the CD board.
4.
Remove the screw C attaching the switch board and
release the two tabs e attaching the switch board
outward and detach the switch board.
5.
Remove the two screws D attaching the CD board.
First release the two tabs f and two tabs g attaching
the motor, then release the CD board.
If the tabs f and g are hard to release, it is
recommendable to unsolder the two soldered parts
on the motor terminal of the CD board.
Tabs e
C
Switch board
CW3
CD changer unit
Fig.8
CD board
D
Tabs g
Soldered parts
CD mechanism board
motor connecter
Pickup unit connector
Card wire
Belt
Motor
Tabs f
1-12
Soldering
Picup unit
connector
Fig.9
Page 13
Removing the CD mechanism holder
assembly (mechanism included)
(See Fig.10 to 13)
1.
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.
Attention : Solder is put up before the card wire is
removed from the pick-up unit
connector on the CD mechanism
assembly. (Refer to Fig.9)
(When the card wire is removed without
putting up solder, the CD pick-up unit
assembly might destroy.)
MX-K50
Motor connecter
CD changer unit
CD mechanism holder assembly
Pickup unit connector
2.
Remove the screw E attaching 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 y.
3.
Turn the CD mechanism holder assembly half
around the lift up slide shaft h of the CD mechanism
holder assembly until the turn table is reversed, and
pull out the CD mechanism holder assembly.
Lift up slide shaft
Fig.10
E
Stopper
CD mechanism holder assembly
Fig.11
Lift up slide shaft n
CD mechanism holder assembly
Fig.13
y
CD mechanism holder assembly
Fig.12
1-13
Page 14
MX-K50
<CD mechanism section>
•
Removing the CD mechanism holder from the CD
chager unit.
(Refer to "Removing the CD mechanism holder
assembly" )
Removing the pickup unit (
1. Removing the cut washer on the feed gear
sleeve and pull out the feed gear.
2. Remove the two screws A fixing the pickup
shaft.
3. Removing the pickup unit.
Removing the motor board
1. Unsolder the motor terminal on the motor board.
2. Remove the moter board.
Removing the feed motor (
Remove the two motor fixing screws at B and
removing the feed motor.
See Fig.1)
(See Fig.2)
See Fig.1)
A
Motor board
Shutter
Cut washer
B
Fig.1
Unsolder
Pickup unit
Feed motor
Shaft
A
Feed Gear
Removing the spindle motor
The spindle motor cannot be removed as a single
unit.
When removing the spindle motor, change the chasis
and turntable together as aunit.
Spindle motor
Unsolder
Fig.2
1-14
Page 15
MX-K50
<Cassette mechanism section>
Removing the record/playback mechanism.
Removing the R/P head.
1. Remove the screw A on the right side of the
R/P head.(Fig.1, Fig.2)
2. Remove the screw B on the left side of the
R/P head.(Fig.1, Fig.2)
Remove the erase head.
Remove the screw C fixing 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.
R/P Head
E. Head
Stoppsr
A
B
C
Fig.1
B
Pinch roller
assembly
A
Spring
Pinch roller
Return spring
R/P Head
Fig.2
Pinch roller
Fig.3
Pinch roller
stopper
Pinch roller
spring
Return spring
Return spring
Fig.4
1-15
Page 16
MX-K50
Removing the motor.
1. Remove the two screws D fixing 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.
coil terminal.(Fig.5)
2. Remove the two screws E fixing the board.(Fig.5)
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)
Unsolder the four parts a on the solenoid
3. Unhook the three parts b from the board.(Fig.5)
4. Remove the mechanism board.(Fig.5)
Removing the flywheel.
Remove the cut-washers at c and d from the
Mecha.
a
Drive belt (Flat)
board
E
b
Motor
Motor
terminal
D
D
Fig.5
Drive belt
Fig.6
E
Drive belt
Motor
b
a
1-16
Sleeve
Flywheel
c
Washer
Fig.9
Sleeve
d
FR belt
Capstan
washer
Flywheel
Fig.7
FR belt
Fig.8
Capstan
washer
Flywheel
Page 17
< Speaker section >
It is exchange in a unit.
Please do not decompose as much as possible.
Removing the front panel
(See Fig. 1 and 2)
1.
Remove the four bosses and duct, and remove the
front panel.
Notes:
It will be good to use the tool with a flat tip, since it is hard
to remove. Please take care not to damage the cabinet at
this time.
MX-K50
The tool with
a flat tip
Front panel
Fig.1
Removing the tweeter (See Fig. 2)
Prior to performing the following procedure, remove
the front panel.
Remove the cord from the speaker terminal.
1.
Remove the two screws A attaching the tweeter on
2.
the front panel (inner side).
Notes:
Squawker cannot be removed.
Boss
Front panel
Squawker
A
Duct
Code
Speaker terminal
Tweeter
B
Woofer
Fig.2
Removing the woofer (See Fig. 2 and 3)
Prior to performing the following procedure, remove
the front panel.
Remove the four screws B attaching the woofer and
1.
remove the woofer.
Remove the cord from the speaker terminal.
2.
Remove the capacitor pasted up on the woofer.
3.
Speaker terminal
Code
Packing
Capacitor
Woofer (reverse side)
1-17
Page 18
MX-K50
Wiring connection
Amp. board
ACW2
ACW1
3809-001224
UCW7
AH39-00245A
CD switch board
UCW1
0
9
MCW1
0
9
3809-001315
Mic board
0
Front key board
9
9
MCW2
AH39-00245A
MCW3
0
AH39-00248A
9
0
AH39-00249A
UCW2
UCW3
Front board
RCW2
PCW1
RFS3
RFS5
RFS6
UCW4
RFS4
RFS7
UCW6
UCW5
RFS2
RFS8
Power transformer
AH39-20561P
3809-001121
CD mechanism
CW2
CW1
CW3
0
3809-001185
Color codes are shown below.
1 Brown
2 Red
3 Orange
4 Yellow
5 Green
6 Blue
7 Violet
0
9
8 Gray
9 White
0 Black
AAN1
0
2
0
2
AH38-12001A
CW102
CW103
9
CW105
CW101
CW3
CW106
CW104
3809-001034
9
0
CD board
AH39-20025S
1-18
3809-001228
3809-001184
3809-001222
0
CW302
9
0
9
8
2
CW301
Voice board
FCW1
OCW
9
0
RCW6
FCW2
KCW2KCW1
HCW3
Tuner board
JCW1
CON01
Main board
JCW2
FCW3
ECW1
0
0
9
RW2
9
0
0
9
RW1
2
0
2
9
0
HCW2
AH39-00247A
9
Headphone J.board
AH39-00022A
9
2
0
0
9
0
88
9
0
9
0
9
2
0
AH39-20002D
8
2
9
Page 19
Adjustment method
1. Tuner
MX-K50
Received FREQ.
Adjustment point
Output
* Adjustment Location of Tuner PCB
AM(MW) OSC Adjustment
9kHz step : 531~1602kHz
10kHz step : 530~1710kHz
MO
1~7.0V 0.5V
MAIN
PCB
VT
GND
AM(MW) RF Adjustment ITEAM
594 KHz
600 KHz
MA
Maximum Output(Fig.1)
TESTER
Fig.1 OSC Voltage
1-19
Page 20
MX-K50
FM THD Adjustment
SSG FREQ.
98 MHz
Adjustment
point
FM DETECTOR COIL
(FM DET)
Output
60 dB
Minumum Distortion (0.4% below)
(Fig.2)
FM Search Level Adjustment
SSG FREQ.
Adjustment
point
(SVR1)
BEACON
SENSITIVITY
SEMI-VR(20K
98 MHz
Output
GND
FM S.S.G
FM
Antenna
Terminal
SET
Oscilloscope
Input
Speaker
Terminal
output
Input
Distortion Meter
Fig.2 IF CENTER and THD Adjustment
28 dB
)
FM Antenna
SET
Output
28 dB(
2dB)
Adjust SVR1 so that "TUNED" of FLT
is lighted (Fig.3)
*Adjust FM S.S.G level to 28dB
AM(MW) I.F Adjustment
SSG FREQ.
Frequency
450 kHz
522 kHz
Adjustment
point
AM IF
Maximum output (Fig.4)
FM S.S.G
GND
FM IN
Fig.3 FM Auto Search Level Adjustment
60cm
OUTPUT
AM SSG
450KHZ
AM ANT
IN
20 k
AM IF
Speaker Terminal
1-20
INPUT
VTVMOscilloscope
OUTPUT
Fig.4 AM I.F Adjustment
Page 21
2. Cassette Deck
To adjust tape speed
Notes
1) Measuring tape:
i) VT-712/MTT-111(or equivalent)
(Tapes recorded with 3kHz)
ii) AC-225/MTT-5512(or equivalent)
2) Connect the cassette deck to the frequency counter
as in fig.1.
Cassette Deck
SPK OUT
MX-K50
Frequency Counter
output
Fig.1
Pre-Setup
Condition
NOR
13KHz
SPEED
Control
OUT
(connected to the
frequencycounter)
1) Deck 1:VT-712
2) Press PLAY
SW button
To Adjust
Turn VSR1 to
left and right
(FRONT PCB)
3) Deck 2:Same
as above
To adjust plabyback level/REC
Notes
1) Before the actual adjustment, clean the play/recording head.
3) The cassette deck is connections as shown in fig.2.
Cassette Deck
SPK OUT
(GND)
Fig.2
VTVM
In Out
RemarkStandardPre-SetupItemStep
1%
range
Oscilloscope
1. Adjust Deck 1 Play Level
Pre-Setup
Condition
AZIMUTH1SPK OUT
(VTVM is
connected to
the scope)
After putting VT-703
into Deck 1
- Press FWD PLAY
button.
To Adjust
Turn the control
screw to as
shownin Fig.3.
Max output
and same phase
(both channels)
RemarkStandardPre-SetupItemStep
After
adjustment
secure it with
REGION
LOCK.
1-21
Page 22
MX-K50
2. Adjust Deck 2 Play Level/REC BIAS
2
AZIMUTH1
Recording
Bias
Voltage
Pre-Setup
Condition
SPK OUT
(VTVM is
connected to
the scope)
Fig.4
Recording /Play head
After putting VT-703
into Deck 2
1)Press FWD PLAY
button.
After putting AC-225
into Deck 2
1)Press REC PLAY
button.
2)MAIN PCB JCW3,
connectted to VTVM
To Adjust
Turn the control
screw to as
shown in Fig.3.
Turn JSR2L,
JSR2R to the
right and left
Max output
and same phase
(both channels)
7mV(
0.5mV)
RemarkStandardPre-SetupItemStep
After
adjustment
secure it with
REGION
LOCK.
AZIMUTH control screw
Audio OSC.
Fig.3
AUX IN
SET
(MAIN PCB)
LINE OUT
IN
TP
JCW3
Fig.4
VTVM
IN OUT
Oscilloscope
1-22
Page 23
Flow of functional operation until TOC read
Power ON
Play Key
RESET a CD LSI
MX-K50
Check Point
Confirm that the voltage at the pin17
of KB9226(IC101) is "L" "H".
LIMIT SW ON
SET Default value of
TE gain, TE balance
Automatic adjusting of
focus bias
Automatic adjusting of
FE offset
Automatic adjusting of
TE offset
LASER power ON
Detection of disk
Confirm that the voltage at the pin33
of KB9226(IC101) is "H" "L" "H".
Confirm that the voltage at the
pin37 of KB9226(IC101) is 3.5V.
Tracking error waveform at TOC reading
Pin 34 of
KB9226
(IC101)
Approx
0.4V
2.50V
Disc states
to rotate
Approx.3.7sec
Disc is rotated
Automatic adjusting of
TE balance
Automatic adjusting of
TE gain
TOC reading
Play a disc
Confirm that the signal from pin24
of KB9226(IC101) is 3.5V as a
accelerated pulse during
approx.1.96s.
Confirm the waveform of
the Tracking error signal
at the pin 34 of KB9226(IC101).
Confirm the eye-pattern
at the pin2 of KB9226(IC101).
1-23
Page 24
MX-K50
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.
(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.
(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 :
amplitude of eye pattern) will below.
Is the level of
RF OUT under
1.1V 0.2Vp-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.
Function
Analog Ground for DPLL
Pump out for VCO1
Digital Ground Separated Bulk Bias for DPLL
Digital Power Separated Bulk Bias for DPLL (3V Power)
Digital Power (5V Power, I/O PAD)
X'tal oscillator input (16.9344MHz)
X'tal oscillator output
Digital Ground (I/O PAD)
EFM signal input
CLV Servo locking status output
LPF time constant control of the spindle servo error signal
Phase control output for Spindle Motor drive
Speed control output for Spindle Motor drive
Word clock output (Normal Speed : 88.2KHz, Double Speed : 176.4KHz)
Various Data/Clock Input
The Lock status output of frame sync
4.2336MHz clock output
System Reset at 'L'
Latch signal input from Micom
Serial data input from Micom
Serial data receiving clock input from Micom
The internal status output to Micom
Subcode sync signal(S0+S1) output
Subcode-Q data transfering bit clock input
Subcode-Q data serial output
System mute at 'H'
Digital Power (3V Power, Internal Logic)
Digital Ground (Internal Logic)
Digital Power (5V Power, I/O PAD)
Subcode data transfering bit clock
Internal SRAM jitter margin status output
C2 pointer output
Digital audio data output
Serial audio data output (48 slot, MSB first)
Channel clock output
Bit clock output
Bit clock input
Channel clock input
Serial audio data input (48 slot, MSB first)
Digital Ground for DAC
Digital Power for DAC (3V Power)
Right-Channel audio output through DAC
Analog Ground for DAC
Referance Voltage output for bypass
Referance Voltage output for bypass
Analog Power for DAC (3V Power)
Left-Channel audio output through DAC
Analog Power for PLL (3V Power)
Photo diode F & tracking(F) I/V amp. inverting input
I
Photo diode E & tracking(E) I/V amp. inverting input
I
Capacitor connection to limit the defect detection
I
Capacitor connection to mirror hold
I
Output pin to connect the component for defect detect
O
Input pin to connect the component for defect detect
I
(VCC+GND)/2 Voltage reference output
O
AGC_equalize level control terminal & capacitor terminal to input in to VCA
I
MX-K50
1-31
Page 32
MX-K50
LC72131(IC02) : PLL frequency synthesizer for electron alignment
1. Pin layout
1
XIN
2
CE
3
DI
4
CL
5
DO
6
BO1
7
BO2
8
BO3
9
BO4
10
I01
20
19
18
17
16
15
14
13
12
11
XOUT
VSS
AOUT
AIN
PD
VDD
FMIN
AMIN
I02
IFIN
2. Block diagram
1
20
14
13
2
3
4
5
15
19
CCB
I/F
Power
on
Reset
Reference
Driver
1
2
Swallow
Counter
1/16,1/17 4bits
12bits
Programmable
Divider
Data Shift Register & Latch
Phase
Detector
Charge
Pump
Unlock
Detector
Universal
Counter
16
17
18
11
3.Pin function
Symbol
XIN
XOUT
FMIN
AMIN
Pin No.
1
20
14
13
Type
Xtal OSC
Local
oscillator
signal input
Local
oscillator
signal input
6
7
9
8
Functions
Crystal resonator connection
(4.5MHz/7.2MHz)
Serial data input : FMIN is selected when DVS is set to 1.
The input frequency range is from 10 to 160MHz.
The signal is passed through a built-in divide-by-two prescaler
and then supplied to the swallow counter.
A1 though the range of divisor setting is from
272 to 65, 535, the actual divisor is twice the setting since
there is also a built-in divide-by-two prescaler.
Serial data input : AMIN is selected when DVS is set to 0.
Serial data input : When SNS is set to 1 :
The input frequency range is form 2 to 40MHz
The signal is supplied directly to the swallow counter.
The range of divisor setting is from 272 to
65, 535 and the actual divisor will be the value set.
Serial data input : When SNS is set to 0 :
The input frequency ranges is from 0.5 to 10MHz.
The signal is supplied directly to a 12-bit
programmable divider.
The range of divisor setting is from 4 to 4,095 and the
actual divisor will be the value set.
1210
(1/2)
Circuit configuration
1-32
CE
2
Chip enable
Most be set high when serial data is input to the
LC72131M (DI ), or when serial data is output (DO).
S
Page 33
MX-K50
3.Pin function
Symbol
CL
DI
DO
VDD
VSS
BO1
BO2
BO3
BO4
Pin No.
4
3
5
15
19
6
7
8
9
Type
Clock
Input data
Output data
Power supply
Ground
Output port
Functions
Used as the synchronization clock when serial data is input
to the LC72131 (DI ), or when serial data is output (DO).
Inputs serial data sent from the controller to the LC72131M.
Output serial data sent from the LC72131M to the controller.
The content of the output data is determined by the serial
data DOCO to DOC2.
The LC72131M power supply (VDD=4.5 to 5/5V)
The power on reset circuit operates when power is first applied.
The LC72131M ground.
Dedicated output pins
The output states are determined by BO1 to BO4 in the
serial data.
'Data"=0:Open
=1:Low
The pins go to the open state after the power-on reset.
An 8Hz time base signal can be output from BO1 when TBC
in the serial data is set to 1.
Note that the ON impedance of the BO1 pin is higher than
that of the other pins (BO2 to BO4)
(2/2)
Circut confguration
S
S
IO1
IO2
PD
AIN
AOUT
10
12
16
17
18
I/O Port
Charge pump
output
L.P.F
amplifier Tr
Pins used for both input and output
The input or output state is determined by bits IOC1 and IOC2
in the serial state.
'Data"=0:Input port
=1:Output port
When specified for use as an input port :
The input state is transmitted to the controller through the
DO pin.
'Input state"=Low:data value 0
=High:data value 1
When specified for use as an output port :
The output state is determined by bits IO1 and IO2 in the
serial sate.
'Data"=0:Open
=1:Low
These pins go to the input port state after the power-on reset.
PLL Charge pump output
When the frequency generated by dividing the Local oscillator
frequency by N is higher than the reference frequency,
a high level will be output from the PD in. similarly, when that
frequency is lower, a low level will be output.
The PD pin goes to the high impedance state when the
frequencies agree.
The MOS transistor used for the PLL active Low-pass filter.
S
IFIN
11
IF counter
The input frequency range is from 0.4 to 12MHz.
The signal is supplied directly to the IF counter.
The result from the IF counter MBS is output through
the DO pin.
There are four measurement periods: 4, 8, 32 or 64ms.
OUT 8.6V
EN 8.6V
EN 12V(a)
GND
EN 12V(b)
N.C.
OUT 5.6V
V
S
OUT 12V(b)
5.6V, 250mA
3
OUT 5.6V
REGULATOR
8.6V, 600mA
REGULATOR
9
OUT 8.6V
SWITCHED
12V, 800mA
REGULATOR
11
OUT 12V(a)
SWITCHED
12V, 1.3A
REGULATOR
1
OUT 12V(b)
SWITCHED
D97AU569C
3.Pin function
PinPinsDescription
1OUT 12V (b)12V/1.3A SWITCHED OUTPUT VOLTAGE
2V
S
3OUT 5.6V5.6V/250mA OUTPUT VOLTAGE
4N.C.not connected
5EN 12V (b)Enable 12V/1.3A SWITCHED OUTPUT VOLTAGE
6GNDGround
7EN 12V (a)Enable 12V/0.8A SWITCHED OUTPUT VOLTAGE
8EN 8.6VEnable 8.6V/0.6A SWITCHED OUTPUT VOLTAGE
9OUT 8.68.6V/0.6A SWITCHED OUTPUT VOLTAGE
10V
S
11OUT 12V (a)12V/0.8A SWITCHED OUTPUT VOLTAGE
Supply Voltage
Supply Voltage
GND
6
1-39
Page 40
MX-K50
KA9258D (IC301
(on the CD board)
) : 4-ch Motor driver
1.Block diagram
2827262524232221201918171615
10K
T • S • D
+-
LEVEL SHIFT
VCCVCC
10K
REGULATOR
10K
10K
GND
10K
10K
10K
50K
MUTE
LEVEL SHIFT
-+
10K
1234567891011121314
GND
LA1837 (IC01) : FM IF/DET AM RF/IF/DET
1.Block diagram
1-40
Page 41
M65855FP (EIC1) : Sound processor
MX-K50
1. Pin layout
1
REF
2
3
4
5
6
7
8
ECHOVOL
3. Block diagram.
CLOCKGND
16
15
ECHOMUTE
V
14
CC
13
OP1 IN
12
OP1 OUT
11
LPF1 IN
LPF1 OUT
10
MIC IN
9
2. Pin function
SymbolPin No.Function
GND1
ECHOVOL
2
REF
3
4
OP2 IN
OP2 OUT
5
LPF2 IN
6
LPF2 OUT
7
8
MIC OUT
9
MIC IN
10
11
12
13
14
15
16
LPF1 OUT
LPF1 IN
OP1 OUT
OP1 IN
V
CC
ECHOMUTE
CLOCK
Echo level control with external DC voltage
To connect 1/2 Vcc output and filter capacitor
Uses external C to from an D/A conversion
integrator
Uses external CR to from a low pass filter at the
input side
Mixing output echo output and microphone
Microphone input
Uses external CR to from a low pass filter at the
input side
Uses external C to from an D/A conversion
integrator
Applies a voltage of 3.5V to 5.5V(Rated5V)
Echo mute control and clock stop control
with external DC voltage
Controls a built -in clock generation circuit with
external R
REF
3
1/2 Vss
10
CLOCK
Oscillator
AUTO
RESET
LPF1
ECHOMUTE
ECHOVOL
DO1
CLOCK
RESET
15
Main control
D1
16
2
VOL
DO0
4
5
D/A
MO
MI
6
LPF2
20Kbit
SRAM
MIC OUT
7
8
MIX
A/D
11
12
13
1
GND
14
V
cc
9
1-41
Page 42
MX-K50
BA3837 (IC301(on the voice board)) : MIC mixer
1.Block diagram
C
16
15
B
A
14
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
+
-
SW2SW1
4
FK
I/O
Power supply
Microphone mixing input
I
O
O
O
O
O
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
+
L-R
5
TK
Function
-
R
L
L+R
LIN
+
-
+
-
+
+
-
6
7
BIAS
8
GND
1-42
Page 43
KA3082 (IC401, IC402) : DC motor driver
1.Pin layout
MX-K50
DRIVER OUT
PRE DRIVER
2.Pin function
Pin No.
10
Symbol
1
2
3
4
5
6
7
8
9
BIAS
1234
V
GND
GND
VO1
VZ1
VCTL
VIN1
VIN2
SVCC
PVCC
VZ2
VO2
I/O
O
O
V
O1
-
I
I
I
-
-
-
Z1
Function
Ground
Output 1
Phase compensation
Motor speed control
Input 1
Input 2
Supply voltage (Signal)
Supply voltage (Power)
Phase compensation
Output 2
LOGIC SWITCH
V
CTL
D
TS
5
V
IN1
678910
IN2
SV
V
CC
PV
CC
V
Z2
V
O2
1-43
Page 44
MX-K50
VICTOR COMPANY OF JAPAN, LIMITED
AUDIO & COMMUNICATION BUSINESS DIVISION
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
(No.21121)
Printed in Japan
200211
Page 45
SCHEMATIC DIAGRAMS
COMPACT COMPONENT SYSTEM
MX-K50
Area suffix
MX-K50
CD-ROM No.SML200211
UW --- Brazil,Mexico,Peru
U --------------- Other Areas
STANDB
Y
STANDBY/ON
3
CD
MX-K50
STANDBY/ON
12
3
AC
T
IVE BASS
SLEEP
L
EVE
L
EX.
456
SOUND
AUX
O
DE
M
78
9
FM M
O
DE
+10
10
ECH
O
KARA
O
KE
FADE
T
APE
FM/AM
T
APE A/B
TING
MU
CD
DISC
SKIP
+
OLUME
V
OLUME
V
–
RM–SMXK50U REMOTE CONT ROL
SP-MXK50
ACTIVE BASS EXT ENSION
FM
AUX
/AM
EPEAT
R
PHONES
CD
PROGRAMRANDO
REC STAR
T
C
D REC
/STO
P
START
M
DUBBING
FULL - LOGIC CONTROL
CA-MXK50
T
APE
A
COMPU PLAY CONTROL
DISPLAY
TUNING
TAPE BTAPE
CD SYNCHRO RECORDING
DISC CHANGE
CD 2
CD 1
CD 3
CD-R/RW PLAYBACK
SOUND
ODE
M
CLOCK
/TIMER
ACTIVE BA
SS
E
X. LEVE
L
SP-MXK50
Contents
Block diagram
Standard schematic diagrams
Printed circuit boards
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
2-1
2-2
2-7~10
No.21121SCH
Nov. 2002
Page 46
MX-K50
In regard with component parts appearing on the silk-screen pr inted side (par ts 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.)
Page 47
Block diagram
5
MX-K50
CON 01
AUX IN
HIC1
AUX
4
AUDIO
FIC4
CD
FIC1
SOURCE
TUNER
MIC
EIC1
ECHO IC
UIC1
MICOM
SELECTOR
& E.VOL
3
AUDIO
MIC
TAPE R
MIC
TAPE R
FIC2
MIC
TAPE P
TAPE R
TAPE R
JIC1
TAPE IC
TAPE P
2
1
ABCDEFG
AIC2
STK402-120
IC301
MIC AMP
IC101 RF AMP. &
SS Processor
IC301
4ch Motor-D
IC201
DSP
IC401 Motor-D
IC402 Motor-D
CD
TAPE P/R
MIC
TAPE P
2-1
Page 48
MX-K50MX-K50
Standard schematic diagrams
Main section
5
To UCW6
Sheet 2/5 (5, A)
4
To CON01
Sheet 5/5 (2, B)
To ACW1
Sheet 3/5 (2, B)
FCW2
CW301CW302
To ACW2
To MCW1
Sheet 2/5 (2, A)
Sheet 3/5 (5, B)
3
To CW106
Sheet 4/5 (5, G)
2
1
SHEET
NUMBER
1/5
2/5
3/5
4/5
5/5
CIRCUIT DESCRIPTION
Main
FL display & System control
Amp.
CD
Tuner
MX-K50 ASIA MAIN
MAIN signal
2-2
TUNER signal
CD signal
TAPE P.B. signal
TAPE REC. signal
Parts are safety assurance parts.
When replacing those parts, make
sure to use the specified parts.
SHEET 1/5
HABCDEFG
Page 49
FL display & System control section
MX-K50
5
To FCW3
Sheet 1/5 (5, A)
4
To UCW7
To CW105
Sheet 4/5 (1, E)
To UCW5
3
2
To UCW2
To UCW1
To ECW1
Sheet 1/5 (3, A)
1
MX-G500/K50 ASIA FRONT
SHEET 2/5
ABCDEFG
2-3
Page 50
Amp. section
MX-K50MX-K50
5
To RW2
Sheet 1/5 (3, G)
4
3
2
To FCW2
Sheet 1/5 (5, G)
1
Parts are safety assurance parts.
MAIN signal
2-4
When replacing those parts, make
sure to use the specified parts.
SHEET 3/5
HABCDEFG
Page 51
MX-K50
CD section
5
To RCW6
SHEET 1/5 (3, A)
4
3
2
1
Switch boardSensor board
SHEET 2/5 (5, D)
ABCDEFG
CD signal
SHEET 4/5
2-5
Page 52
MX-K50MX-K50
Tuner section
5
4
3
2
To FCW1
SHEET 1/5 (4, A)
FM/ TUNER signal
1
AM signal
2-6
SHEET 5/5
HABCDEFG
Page 53
MX-K50
Printed circuit boards
Main board
Main board
5
4
Headphone jack board
3
2
Voice board
1
ABCDEFG
2-7
Page 54
MX-K50MX-K50
Front board
CD switch board
5
Front board
4
3
Front key board
2
1
Mic board
2-8
HABCDEFG
Page 55
MX-K50
Amp. board
5
4
3
Power supply board
2
Fuse boardTrans. board
1
ABCDEFG
2-9
Page 56
MX-K50MX-K50
CD servo board
Tuner board
5
4
3
2
1
2-10
HABCDEFG
Page 57
< MEMO >
MX-K50
Page 58
MX-K50
VICTOR COMPANY OF JAPAN, LIMITED
AUDIO & COMMUNICATION BUSINESS DIVISION
PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan
No.21121SCH
Printed in Japan
200211
Page 59
PARTS LIST
[ MX- K50 ]
* All printed circuit boards and its assemblies are not available as service parts.
Area suffix
UW ---------- Brazil,Mexico,Peru
U ---------------------- Other Areas
MX-K50
- Contents -
Exploded view of general assembly and parts list (Block No.M1)
CD changer mechanism assembly and parts list (Block No.MA)
Cassette mechanism assembly and parts list (Block No.MP)
Electrical parts list (Block No.01~05)
Packing materials and accessories parts list (Block No.M3,M5)
SCREW
SCREW
SCREW
SCREW4
SCREW
SCREW4
WINDOW DOOR A1
WINDOW DOOR B
DOOR CASS A
DOOR CASS B
SPRING DOOR A
SPRING DOOR B
WINDOW VFD
SHEET VFD
CABINET FRONT
BADGE JVC
SHEET VOLUME
KNOB VOLUME1
DECO VOLUME
CAP MIC1
KNOB MIC VOL
KNOB SUBWOOFER1
LENS SUBWOOFER
KNOB SOUND1
LENS SOUND
CABINET FRONT1
DAMPER ASSY
LATCH ASSY2
KNOB POWER1
LENS POWER1
LENS FUNCTION
HOLDER FUNCTION
KNOB PRESET
LENS DISC
KNOB DISC
KNOB TAPE
HOLDER VFD
SUPPORT RIVET1
SUPPORT PCB1
CABINET BOTTOM1
HEAT SINK1
H.SINK BKT R
H.SINK BKT L
REAR CABINET
REAR COVER
TOP CABINET1
HEAT SINK
POWER CORD
SLIDE CAM
BELT LOAD
GEAR PULLEY
GEAR-LOAD
GEAR-CAM
GEAR-TRAY
GEAR-CONVERTOR
GEAR-SYNCRO
GEAR-WORM
LOADING MOTOR
GEAR-ROULETTE
TRAY-ROULETTE
TRAY DISC
SENSOR
BASE MAIN
MAGNET-FERRITE
TABTE-CHUCK UNI
SHEET CHUCK
SWICH MICRO
DC MORTOR
PULLEY-MOTOR
RUBBER-CD
SP MOTOR ASS'Y
LEVER-LIFTER
CD PICKUP
RUBBER-CD(G)
BRKT CHUCK
Q'ty
1
ABS HF-380 NTR
1
CR
1
POM (M90-44)WHT
1
POM (M90-44)BLK
1
POM(M90-44)WHT
1
POM(M90-44)BLK
1
POM (M90-44) WH
1
ABS HF-380 NTR
1
POM (M90-44)WHT
1
FF-030PN-09120
1
POM(M90-44)BLK
1
ABS XR-401 BLK
1
ABS XR-401 BLK
1
KPI-L06
1
CMS-300,BLK
1
3500-3800G,6P
1
BLK,CMS300
1
HYMERON,BLK,0.4
1
MLS-24
1
RF-500TB,9VDC
1
BLK,CMS-CR3
1
RCD380,RED
1
CMS-D73SG6U
1
ABS(BLK),CMS-30
1
SOH-AD3
1
CMS-300D,GREEN
1
SECL 0.8T
Block No. MAMM
Description
3-6
Page 65
Cassette mechanism assembly and parts list
1
ADR248DSW
1
9
8
10
7
6
Block No.
M
MX-K50
M
P
M
8
7
6
5
4
11
14
13
11
14
3
12
2
15
12
Note: Parts listed on the Parts List below can be supplied.
However, parts that are not listed below cannot be supplied
individually but only by purchasing the whole Cassette
Mechanism Assembly Unit. (When ordering, use the Parts No.
AH59-00102A for Cassette Mechanism Assembly Unit.)
Parts list(Cassette mechanism)
ItemParts numberParts nameArea
A
1AH81-00141AREC/PB HEAD2
2AH81-00422AMOTOR ASS'Y1
3AH81-00364AMAIN BELT 11
4AH81-00365AMAIN BELT 21
5AH81-00101AFR BELT2
6AH81-00102ASOLENOID2
7AH81-00282ASPRING2
8AH81-00366APINCH R.ASS'Y2