Jvc MX-K60 Service Manual

MX-K60/MX-K50

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MX-K60

Area suffix

MX-K60
MX-K50

C ---------------- Canada

MX-K50

Area suffix

J ------------------- U.S.A.
C ---------------- Canada

STANDBY/ON

12

3

ACTIVE BASS

SLEEP

EX. LEVEL

456

SOUND

AUX

MODE

78

9

FM MODE

+10

10

FADE

TAPE

FM/AM

TAPE A/B

MUTING

CD

DISC
SKIP

+

VOLUME

VOLUME

–

RM–SMXK50A REMOTE CONTROL

SP-MXK50

Contents

Safety Precautions
Importance administering

point on the safety
Preventing static electricity
Disassembly method
Wiring connection
Adjustment method

STANDBY

STANDBY/ON

ACTIVE BASS EXTENSION

FM

CD

AUX

/AM

PROGRAM RANDOM

REPEAT

PHONES

REC START

CD REC

/STOP

START

Model

MX-K60
MX-K50

1-2

1-3
1-4
1-5
1-17
1-18

3

CD

MX-K50

CLOCK
/TIMER

DISPLAY

TAPE

TUNING

TAPE BTAPE A

COMPU PLAY CONTROL

CD SYNCHRO RECORDING

ACTIVE BASS

DUBBING

FULL - LOGIC CONTROL

CA-MXK50

Flow of functional operation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Trouble shooting
Description of major ICs

CD 1

EX. LEVEL

Color

Black
Silver

CD 2

CD-R/RW PLAYBACK

SOUND

MODE

DISC CHANGE

CD 3

SP-MXK50

1-22
1-23
1-23
1-24
1-27~39

COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

No.21069

Mar. 2002

MX-K60/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 parts which
have these special safety characteristics are identified in the Parts List of Service Manual. Electrical
components having such features are identified by shading on the schematics and by ( ) on the Parts List in
the Service Manual. The use of a substitute replacement which does not have the same safety characteristics
as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or
other hazards.

4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be
separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of
electric shock and fire hazard. When service is required, the original lead routing and dress should be
observed, and it should be confirmed that they have been returned to normal, after re-assembling.

5. Leakage currnet check (Electrical shock hazard testing)
After re-assembling the product, always perform an isolation check on the exposed metal parts of the product
(antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the
product is safe to operate without danger of electrical shock.
Do not use a line isolation transformer during this check.

Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure the leakage
current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return
path to the chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).

Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more
sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15 F AC-type capacitor
between an exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal part,
particularly any exposed metal part having a return path to
the chassis, and meausre the AC voltage across the resistor.
Now, reverse the plug in the AC outlet and repeat each
measurement. Voltage measured any must not exceed 0.75 V
AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).

0.15 F AC TYPE

1500 10W

Good earth ground

AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)

Place this
probe on
each exposed
metal part.

!

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs 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 v oltage.

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

Importance administering point on the safety

MX-K60/MX-K50

RFS5

RFS6

RFS7

4A 125V

4A 125V

6.3A 125V
5A 125V

RFS8

6.3A 125V

Fuse board (Forward side) Power supply board (Forward side)

RFS2

Caution: For continued protection against risk of fire,
replace only with same type 5A/125V for RFS2, 4A/125V
for RFS5 and RFS6, 6.3A/125V for RFS7 and RFS8.
This symbol specifies type of fast operating fuse.

Precaution: Pour eviter risques de feux, remplacez le
fusible de surete de et RFS2 comme le meme type que
5A/125V, 4A/125V pour RFS5 et RFS6, 6.3A/125V pour
RFS7 et RFS8.
Ce sont des fusibles suretes qui functionnes rapide.

^

1-3

MX-K60/MX-K50

Preventing static electricity

1. Grounding to prevent damage by static electricity

Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged,
can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.

2. About the earth processing for the destruction prevention by static electricity

In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity of
the work environment.
Be careful to use proper grounding in the area where repairs are being performed.

2-1 Ground the workbench

Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over
it before placing the traverse unit (optical pickup) on it.

2-2 Ground yourself

Use an anti-static wrist strap to release any static electricity built up in your body.

(caption)
Anti-static wrist strap

Conductive material
(conductive sheet) or iron plate

3. Handling the optical pickup

1. In order to maintain quality during transport and before installation, both sides of the laser diode on the
replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)

2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power
source can easily destroy the laser diode.

4. Handling the traverse unit (optical pickup)

1. Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.

2. Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific
details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse
unit. Be careful not to take too long a time when attaching it to the connector.

3. Handle the flexible cable carefully as it may break when subjected to strong force.

4. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it

Attention when 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

1-4

MX-K60/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 the 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 servo 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 the both side of front panel assembly.

6.

Draw the CD changer unit upward from behind while
pulling the rear panel outward.

Adhesion tape

Fig.4

1-5

MX-K60/MX-K50

CW105

Fig.5

CD servo 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 the CD changer unit.

1.

Disconnect the card wire from the connector FCW3
on the main board.

2.

Disconnect the harness from the connector JCW1,
JCW2 and HCW3 on the main board.

3.

Remove the two screws E attaching the front panel
assembly to both sides of the body.

4.

Remove the screw F attaching the earth terminal
extending from the cassette mechanism assembly.

5.

Remove the screw G attaching the main board to
front panel assembly.

6.

Remove the screw H attaching the front panel
assembly to the 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)

E

FCW3

JCW2

Fig.8

Main board

Main board

JCW1

HCW3

ACW1

ACW2

Amp. board

F(fixing the earth wire)

Front panel
assembly

G

1-6

Fig.9

Joint1
(both sides)

E

(both sides)

MX-K60/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 the 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 and three screws N attaching
the rear panel.

J

Heat sink

J

N

Main board

Fig.11

Rear panel

L

M

K

Speaker

terminal

Fig.12

Rear panel

CON01

Tuner board

Fig.13

1-7

MX-K60/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 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
holder to the front panel assembly. (See Fig.9)

4.

Remove the two screws O attaching the heat sink to
bottom chassis.

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 power supply board and pull up the
power cord stopper upward.

Fuse board

PCW1

Power supply

board

RCW2

Power cord
Power cord

stopper

Bottom chassis

Power ICs solder point

FCW3

JCW2

JCW1

Main board

HCW3

Heat sink

O

Fig.14

Heat sink

Amp. board
(reverse side)

Removing the power ICs

(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 ICs solder point.

2.

Remove the two screws P attaching the power ICs
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.

Disconnect the power cord from the connector RCW2
on the power supply board.

2.

Disconnect the harness from the connector PCW1 on
the fuse board.

Q

Bottom chassis

Fig.15

P

Fig.16

Power transformer

Heat sink

Amp. board

PCW1

Fuse board

R

Power supply

board

RCW2

3.

Remove the four screws Q attaching the power
transformer and the screw R attaching the earth
terminal on the bottom chassis.

1-8

Fig.17

MX-K60/MX-K50

<Front panel assembly>

Prior to performing the following procedure, remove
the metal cover, the CD changer unit and the front
panel assembly.

Removing the power / CD switch board
(See Fig.1)

1.

Disconnect the card wire from the connector UCW1
on the power / CD switch board.

2.

Remove the five screws A attaching the power / CD
switch board.

Removing the FL display & system control
board (See Fig.1)

1.

Disconnect the card wire from the connector UCW3,
UCW4, UCW5 and UCW6 on the FL display & system
control board.

2.

Remove the six screws B attaching the FL display &
system control board.

3.

Disconnect the card wire from the connector UCW2
on the FL display & system control board.

B

UCW2
UCW3

B

UCW4

Front panel assembly (inner side)

A

Power / CD switch board

Fig.1

Sound mode knob

Volume knob

FL display &
system control
board

UCW1

UCW5
UCW6

Removing the headphone jack board
(See Fig.3)

Prior to performing the following procedure remove
the FL display & system control board.

1.

You can pull out the headphone jack board.

Removing the front key switch board

(See Fig.2 and 3)

Prior to performing the following procedure, remove
the FL display & system control board.

1.

Pull out the sound mode knob, volume knob and
active bass ex. level knob from front side.

2.

Remove the twelve screws C attaching the front key
switch board.

3.

Remove the front board releasing the two tabs.

Removing the cassette mechanism
assembly (See Fig.3)

UCW7

Tab

Tab

Mecha.

board

C

C

D

Active bass ex. level knob

Fig.2

Front panel assembly (inner side)

Front key switch board

Headphone

jack board

D

1.

Disconnect the card wire from the connector on the
mecha. board.

2.

Remove the six screws D attaching the cassette
mechanism assembly.

D

(fixing the earth wire)

Connector

Cassette mechanism

assembly

Fig.3

1-9

MX-K60/MX-K50

<CD changer unit>

Prior to performing the following procedure, remove
the CD changer unit.

Removing the CD tray (See Fig.1 to 3)

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 servo board.

3.

Push down the two tray stoppers marked a and pull
out the CD tray.

CD changer uint (reverse side)

CD servo board

CW103

Loading pulley gear

CD tray

Fig.1

CD tray

Reinstall the CD tray (See Fig.4 and 5)

1.

Align the gear-cam with the gear-tray as shown fig.4,
then mount the CD tray.

2.

When assembling the CD tray, take extreme care not
engage with gear - synchro.

Gear-cam

Gear-tray

CD tray

(Tray stopper)

Fig.2

a (Tray stopper)

a

CW103
(on the CD servo board)

Fig.3

Gear-convert

Gear-convert

1-10

Gear-tray

Gear-cam

timing point

Gear-tray

CD tray

Fig.4 Fig.5

Gear-synchro

Removing the sensor board / the turn
table motor assembly (See Fig.6 to 8)

Prior to performing the following procedure, remove
the CD tray.

MX-K60/MX-K50

A

1.

Remove the screw A attaching the sensor board and
release the two tabs b attaching the sensor board on
the under side of the CD tray.

2.

Disconnect the harness from connector CW1 on the
sensor board and release the harness from the two
hooks c. Remove the sensor board.

3.

Remove the screw B attaching the turn table. Detach
the turn table from the tray.

4.

Pull outward the tab marked d attaching the turn
table motor assembly on the upper side of the tray
and detach the turn table motor assembly from the
tray.

Tray

b

CW1

c

b

Sensor board

Fig.6

Turn table

B

Turn table motor assembly

Fig.7

d

Fig.8

1-11

MX-K60/MX-K50

Removing the belt, the CD servo board
and the switch board (See Fig.9 and 10)

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 servo 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 servo
board and . First release the two tabs f and two tabs
g attaching the CD servo board motor to raise the
CD servo board slightly, then release the CD servo
board.

Tabs e

C

Switch board

CW3

CD changer unit

Fig.9

CD servo board

D

Tabs g

Soldered parts

CD mechanism board

motor connecter

Pickup unit connector

Belt

Motor

Tabs f

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 servo board.

Soldering

Card wire

Picup unit
connector

Fig.10

1-12

Removing the CD mechanism holder
assembly (mechanism included)

(See Fig.11 to 14)

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.10)
(When the card wire is removed without
putting up solder, the CD pick-up unit
assembly might destroy.)

MX-K60/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.11

E

Stopper

CD mechanism holder assembly

Fig.12

Lift up slide shaft n

CD mechanism holder assembly

Fig.14

y

CD mechanism holder assembly

Fig.13

1-13

MX-K60/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 Gear

Feed motor

Shaft

A

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.

< Speaker section >

Spindle motor

Unsolder

Fig.2

It is exchange in a unit.
Please do not decompose.

1-14

MX-K60/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

stopper

Fig.3

Pinch roller

Pinch roller

spring

Return spring

Return spring

Fig.4

1-15

MX-K60/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)

Removing the flywheel.

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)

Remove the cut-washers at c and d from the

Mecha.

a

Drive belt (Flat)

board

E

terminal

b

Motor

Motor

D

D

Fig.5

Fig.6

E

Drive belt

Motor

Drive belt

b

a

1-16

Sleeve

Flywheel

Capstan

washer

d

c

Sleeve

Washer

FR belt

Flywheel

Fig.7

FR belt

Fig.8Fig.9

Flywheel

Capstan

washer

MX-K60/MX-K50

Wiring connection

Amp. board

ACW2

ACW1

3809-001224

UCW7

0

9

3809-001315

0

9
0

AH38-00249A

AH39-00245A

UCW2

Power transformer

UCW3

RCW2

PCW1

RFS5

RFS2

RFS6

RFS7

RFS8

AH39-20561P

3809-001121

CD mechanism

CW2

CW3

AAN1

CW1

AH38-12001A

CW102

9

0

Color codes are shown below.
1 Brown

2 Red
3 Orange
4 Yellow
5 Green
6 Blue

0

9

7 Violet
8Gray
9 White
0 Black

0

2

0

2

CW103

CW105

3809-001034

3809-001228

3809-001184

3809-001222

CW106

9

9

0

AH39-200060A

CD servo board

0

9

8

Power /CD switch board

UCW1

UCW4

CW101

CW104

Front key switch board

UCW6

FL dispaly & system control board

UCW5

3809-001185

CW3

0

2

0

FCW1

OCW

9

0

RCW6

FCW2

Main board

Tuner board

HCW3

JW1

JCW1

FCW3

JCW2

FCW3

0

9

RW2

9

0

9

0

0

9

RW1

2

0

2

9

0

HCW2

AH39-00247A

9

Headphone J.board

AH39-00022A

9

0
9

0

2

0

88

9

9

2

0

AH39-20002D

8

2

1-17

MX-K60/MX-K50

Adjustment method

1. Tuner

ITEAM

Received FREQ.
Adjustment

point

Output

* Adjustment Location of Tuner PCB

AM(MW) OSC
Adjustment

530~1710 KHz

MO

1~7.0 0.5V

MAIN
PCB

AM(MW) RF
Adjustment

603 KHz

MA

Maximum
Output(Fig.1)

VT GND

Fig.1 OSC Voltage

TESTER

1-18

FM THD Adjustment

MX-K60/MX-K50

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

Speaker
Terminal

SET

output

Distortion Meter

Fig.2 IF CENTER and THD Adjustment

28 dB

FM Antenna

Input

Oscilloscope

Input

SET

Output

28 dB(

2dB)

Adjust SVR1 so that "TUNED" of FL T
is lighted (Fig.3)

*Adjust FM S.S.G level to 28dB

AM(MW) I.F Adjustment

SSG FREQ.
Frequency

450 kHz
520 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

INPUT

VTVM Oscilloscope

OUTPUT

Fig.4 AM I.F Adjustment

1-19

MX-K60/MX-K50

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

Frequency Counter

output

Fig.1

Pre-Setup
Condition

NOR

1 3KHz

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.

2) Measuring tape :
i) VT-703/MTT-114N(or equivalent 10kHz AZIMUTH control)

ii) AC-225/MTT-5512(or equivalent)

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

AZIMUTH1 SPK OUT

(VTVM is
connected to
the scope)

1-20

After putting
MTT-114N 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.

2. Adjust Deck 2 Play Level/REC BIAS

MX-K60/MX-K50

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

1-21

MX-K60/MX-K50

Flow of functional operation until TOC read

Power ON

Play Key

RESET a CD LSI

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).

1-22

Maintenance of laser pickup

MX-K60/MX-K50

(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.

Play a disc.

Check the eye-pattern at TP1.

Finish.

1-23

MX-K60/MX-K50

Troubleshooting

1. Amplifier

Power malfunction

No output

,5,6,7

1-24

5,6,7

2.Tuner malfunction (FM/AM)

MX-K60/MX-K50

3.Tape

HA12235F

HA12235F

JIC1(HA12235F) PIN5,26

3,4,27,28

16

JC63L,JC63R,JR65L,JR65R

1-25

MX-K60/MX-K50

4.CD

1-26

Description of major ICs

KA3082 (IC401, IC402) : DC motor driver

1.Pin layout

MX-K60/MX-K50

DRIVER OUT

PRE DRIVER

2.Pin function

Pin No.

10

Symbol
1
2
3
4
5
6
7
8
9

BIAS

1234

GND

GND

VO1

VZ1

VCTL

VIN1

VIN2
SVCC
PVCC

VZ2

VO2

V

I/O

-

O

­I
I
I

-

-

-

O

V

O1

Function
Ground
Output 1
Phase compensation
Motor speed control
Input 1
Input 2
Supply voltage (Signal)
Supply voltage (Power)
Phase compensation
Output 2

Z1

LOGIC SWITCH

V

CTL

TSD

5

V

IN1

678910

IN2

SV

V

CC

PV

CC

V

Z2

V

O2

1-27

MX-K60/MX-K50

5L9290 (IC201) : Digital signal processor for CDP

1. Pin layout

RCHOUT

VSSA_DAC

VREF

VHALF

VDDA_DAC

LRHOUT

VDDA_PLL

48 47 46 45 44 43 42 41 40 39 38 37

VSSD_DAC

VDDD_DAC

SADTI

LRCKI

BCKI

2. Block diagram

VSSA_PLL

VCO1LF

VSSD_PLL

VDDD_PLL

VDDD1_5V

XIN

XOUT

VSSD1_5V

EFMI

LOCK

SMEF

SMON

1

2

3

4

5

6

7

8

9

10

11

12

13 14 15 16 17 18 19 20 21 22 23 24

SMDS

WDCK

S5L9290X

DSP+DAC

48-LQFP-0707

LKFS

TESTV

LKFS

RESETB

MLT

MDAT

SOS1

SQCK

SBCK

SQDT
SBDT

MCK

ISTAT

S0S1

C2PO DATX

SQCK

36

35

34

33

32

31

30

29

28

27

26

25

BCKO

LRCKO

SADTO

DATX

C2PO

JITB

SBCK

VDDD3-5V

VSSD2-3V

VDDD2-3V

MUTE

SQDT

VCO1LF

EFMI

LOCK

SMEF
SMDP
SMDS

WDCK

WFCK

RFCK

C4M

XIN

ISTAT

MLT

MDAT

MCK

MUTE

DPLL

CLV

Servo

Timing

Generator

Micom

Interface

Subcode

Out

EFM

Demodulator

ECC

16K

SRAM

Address

Generator

JITB

Interpolator

Interface

SADTO
LRCKO

BCKO

I/O

Digital

Out

SADTI
LRCKI

BCKI

Digital

Filter

1-bit
DAC

PWM

LPF

LCHOUT
RCHOUT

VHALF

VREF

1-28

3. Pin function

MX-K60/MX-K50

NO.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
28
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48

Symbol
VSSA_PLL
VCO1LF
VSSD_PLL
VDDD_PLL
VDDD1-5V
XIN
XOUT
VSSD1
EFMI
LOCK
SMEF
SMDP
SMDS
WDCK
TESTV
LKFS
C4M
RESETB
MLT
MDAT
MCK
ISTAT
S0S1
SQCK
SQDT
MUTE
VDDD2-3V
VSSD2
VDDD3-5V
SBCK
JITB
C2PO
DATX
SADTO
LRCKO
BCKO
BCKI
LRCKI
SADTI
VSSD_DAC
VDDD_DAC
RCHOUT
VSSA_DAC
VREF
VHALF
VDDA_DAC
LCHOUT
VDDA_PLL

I/O

-

O

-

-

­I

O

-

I
O
O
O
O
O

I
O
O

I

I

I

I
O
O

I
O

I

-

-

-

I
O
O
O
O
O
O

I

I

I

-

-

O

­O
O

­O

-

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)

1-29

MX-K60/MX-K50

KB9226 (IC101) : RF amp. & servo signal processor

1. Pin layout

36 35 34 33 32 31 30 29 28 27 26 25

SLP

LD

37

PD

38
39

PDAC
PDBD

40

PDF

41

PDE

42

DCB

43

MCP

44

DCCI

45

DCCO

46

VREF

47

EQC

48

1 2 3 4 5 6 7 8 9 10 11 12

ATSC

RFM

LPFT

RFO

TEIO

EQI

FEO

GND

TZC/SSTOP

S1L9226X

EFMI

VCC

EQO

FEM

FRSH

TEO

FSET

TEM

FLB

FGD

SLO

FSI

SLM

SPO
SPM
ASY
EFM

LOCK

WDCK

CLVI

RESET

MLT

MDATA

MCK

ISTAT

TGU

24
23
22
21
20
19
18
17
16
15
14
13

2. Block diagram

EQO

4

5

EFMI

45

DCCI

46

DCC0

44

MCP

43

DCB

VCC/

6

VDD

FRSH

7

FSET

8

FLB

9

FGD

10

FSI

11

EQI

RFO

RFM

RF AGC & EQ

Control

Focus OK Detect

Defect Detect Mirror

Gen

Focus Servo Loop

- Gain & Phase
Compensation

- Focus Search

- Offset Adjust

- FZC Gen.

EQC

VREF

Center

Voltage

APC. Laser

Control &

LPC

Tracking Servo Loop

- Gain & Phase
Compensation

- Track Jump

- Offset Adjust

- TZC Gen.

Hardware Logic

- Auto-Sequencer

- Fast Search

- Febias, Focus Servo,
Tracking Offset ADJ.

- Tracking Balance & Gain
Adjust

- Interruption Detect

- EFM Muting System

PDE

41 40424748123

Tracking Error

(RW)

I/V AMP

PDF

PDBD

39

RF & Focus

Error (CD-RW)

I/V AMP

Sled Servo &

Kick Gen

PDAC

38
37

35
34

33
36

29
28

27
26
25

29

30

PD
LD

LPFT
TEIO

TZC&
SSTOP

ATSC

TEO
TEM

SLP
SLO
SLM

FEO

FEM

1-30

TGU

12

Micom Data Interface Logic Decoder

Comparator

1413 15 16 17 19 18 20 22 21

ISTAT

MCK

MDATA

MLT

RESET

WDCK

CLVI

LOCK

EFM

ASY

EFM

Spindle

Servo LPF

23

24

SPDLO

SPDLM

3. Pin function

Pin No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33

34
35
36
37
38
39
40
41
42
43
44
45
46
47

48

Symbol
RFM
RFO
EQI
EQO
EFMI
VCC
FRSH
FSET
FLB
FGD
FSI
TGU
ISTAT
MCK
MDATA
MLT
RESET
CLVI
WDCK
LOCK
EFM
ASY
SPM
SPO
SLM
SLO
SLP
TEM
TEO
FEM
FEO
GND
TZC/
SSTOP
TEIO
LPFT
ATSC
LD
PD
PDAC
PDBD
PDF
PDE
DCB
MCP
DCCI
DCCO
VREF
EQC

Function

I/O

RF summing amp. inverting input

I

RF summing amp. output

O

RFO DC eliminating input(use by MIRROR, FOK ,AGC & EQ terminal)

I

RF equalizer output

O

EFM slice input. (input impedance 47K)

I

Main power supply

P

Capcitor connection to focus search

I

Filter bias for focus,tracking,spindle

I

Capacitor connection to make focus loop rising band

I

Terminal to change the hign frequency gain of focus loop

I

Focus servo input

I

Connect the component to change the high frequency of tracking Loop

I

Internal status output

O

Micom clock

I

Data input

I

Data latch input

I

Reset input

I

Input the spindle control output from DSP

I

88.2KHz input terminal from DSP

I

Sled run away inhibit pin (L: sled off & tracking gain up)

I

EFM output for RFO slice(to DSP)

O

Auto asymmetry control input

I

Spindle amp. inverting input

I

Spindle amp. output

O

Sled servo inverting input

I

Sled servo output

O

Sled servo noninverting input

I

Tracking servo amp.inverting input

I

Tracking servo amp. output

O

Focus servo amp. inverting input

I

Focus servo amp. output pin

O

Main ground

P

Tracking zero crossing input & Check the position of pick-up wherther inside or not

I

Tracking error output & Tracking servo input

B

Tracking error integration input (to automatic control)

I

Anti-shock input

I

APC amp. output

O

APC amp. input

I

Photo diode A & C RF I/V amp. inverting input

I

Photo diode B & D RF I/V amp. inverting input

I

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-K60/MX-K50

1-31

MX-K60/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

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.

9

8

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

MX-K60/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.

1-33

MX-K60/MX-K50

HA12235 (JIC1) : Audio signal processor

1. Block diagram

1M

Vcc

+

10u

A

REC MUTE OFF/ON

MUTE ON/OFF

(REC RETURN ON/OFF)

A/B

High/Normal

ALC ON/OFF

REC OUT(L)

REC IN(L)

PB OUT(L)

EQOUT(L)

PB-EQ(L)

4.7 k

PB-NF2(L)

(6.8k+1.5k)

2.2u

8.2k

NC

2.2k

ALC(L)

0.1u

15k

NC

10k

2.2u

0.1u

TAI(L)

k

4.7

0.01u

21

22

23

24

2526

27

28

29

30

TEST

(Open for normal use)

20

22k

Iref

19

GND

18

EQ

MUTE

120/60

(Norm/High)

+

AB

ALC DET

17

Vcc

16

Return SW

ALC

15

Return SW

14

13

12

MUTE

AB

11

EQ

120/60

(Norm/High)

+

2.2u

+

10

9

NC

ALC(R)

8

0.1u

7

REC IN(R)

6

NC

2

2.2u

+

+

5

4

TAI(R)

3

EQOUT(R)
PB-EQ(R)

2

1

PB-NF2(R)

(6.8k+1.5k)

8.2k

REC OUT(R)

2.2k

15k

10k

PB OUT(R)

0.1u

4.7 k

4.7 k

0.01u

2. Pin function

Pin No.

1
2
3
4
5
6
7
8

9
10
11
12
13

1-34

Symbol
PB-NF2(R)
PB-EQ(R)
EQOUT(R)
TAI(R)
PBOUT(R)
NC
RECIN(R)

NC
RECOUT(R)
ALC ON/OFF
High/Norm
A/B

31

AIN(L)

+

PB-NF1(L)

47u

Function
PB EQ feed back
NAB output
EQ output
Tape input
PB output
NC pin
REC-EQ input

NC pin
REC output
Mode control input
Mode control input
Mode control input

32

Pin No.

33

RIP
1u

34

+

BIN(L)

Symbol

14

MUTE ON/OFF

15

REC MUTE OFF/ON

16

Vcc
17
18

GND
19

IREF

20

Test mode
21

RECOUT(L)
22

NC
23
24

RECIN(L)
25

NC
26

PBOUT(L)

REC

Return

35

36

GND

Function
Mode control input
Mode control input
Vcc pin

GND pin
Equalizer reference
current input
Test mode pin
REC output
NC pin

REC-EQ input
NC pin
PB output

37

IN(R)

B

38

NC

Pin No.

27
28
29
30
31
32
33
34
35
36
37
38
39
40

39

AIN(R)

Symbol
TAI(L)
EQOUT(L)
PB-EQ(L)
PB-NF2(L)
PB-NF(L)
AIN(L)
RIP
BIN(L)
REC-RETURN
GND
BIN(R)
NC
AIN(R)
PB-NF1(R)

40

+

PB-NF1(R)

47u

Functon
Tape input
EQ output
NAB output
PB EQ feed back
PB EQ feed back
PB A deck input
Ripple filter
PB B deck input
REC Return
GND pin
PB B deck input
NC pin
PB A deck input
PB EQ feed back

M66010 (UIC2) : I/O control

1.Pin layout

MX-K60/MX-K50

D0
D1

CLK

CS

Vcc

GND

D24
D23
D22
D21
D20
D19
D18
D17

GND

1
2
3
4
5

S

6
7
8

9
10
11
12
13
14
15
16

2.Block diagram

CLOCK INPUT CLK

SET INPUT S

CHIP SELECT CS

INPUT

SERIAL DATA DI

INPUT

DO
DI
CLK
CS

S

D24
D23
D22
D21
D20
D19
D18
D17

D1
D2
D3
D4
D5
D6
D7
D8

D9
D10
D11
D12
D13
D14
D15
D16

3

6

4

2

32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17

Control circuit

D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16

Shift register 1

D24 D23 D22 D3 D2 D1

Q24 Q23 Q22 Q3 Q2 Q1

Parallel output latch

D24 D23 D22 D3 D2 D1

Q24 Q23 Q22 Q3 Q2 Q1

Shift register 2

DI

DO

GND GND

7

Vcc

5

DO SERIAL DATA

1

OUTPUT

32

D1

31

D2

30

D3

PARALLEL
DATA I/O

10

D22

9

D23

8

D24

16

STK402-120 (AIC1) : Power amp.

1.Pin layout

+

ch.1

_

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Ch.1INCh.1NFNC Pre

+Vcc

BIAS Ch.1

+VE

Ch.1

+Vcc -Vcc Ch.2

-VE

+VE

Ch.2

-VE

ch.2

Pre

-Vco

+
_

SUB

GND

Ch.2NFCh.2

IN

1-35

MX-K60/MX-K50

TDA7442D (FIC1) : Audio processor

1.Pin layout

R_IN3
R_IN2
R_IN1

L_IN1
L_IN2 V
L_IN3
L_IN4

MUXOUTL

IN(L)

MUXOUT(R)

IN(R)

BIN(R)

BOUT(R)

BIN(L)

1
2
3
4
5
6
7
8
9
10
11
12
13
14

2.Block diagram

MUXOUT(L)

0.47 F

0.47 F

0.47 F

0.47 F

0.47 F

0.47 F

0.47 F

0.47 F

L-IN1

L-IN2

L-IN3

L-IN4

R-IN1

R-IN2

R-IN3

R-IN4

4

50K

5

50K

6

50K

7

50K

3

50K

2

50K

1

50K

28

50K

31.5dB

control

31.5dB

control

MUXOUT(R)

+

+

2.2 F

-

2.2 F

28

R_IN4

27

LOUT

26

ROUT

25

AGND

24

S

CREF23
SDA

22

SCL

21

DIG-GND

20

TREBLE(R)

19

TREBLE(L)

18

PS1

17

LP

16
15

BOUT(L)

5.6K

100nF

100nF

BIN(L)

BOUT(L)

15

14

RB

FIX

BASS

I2C BUS DECODER + LATCHES

BASS

12

BIN(R) BOUT(R)

100nF 100nF

5.6K

FIX

VAR

RB

1319

79dB CONTROL

-

VAR

+

FIX

+

-

SPKR

MUTE

SPKR

MUTE

79dB CONTROL

D98AU947A

ATT

27

LOUT

21

SCL

22

SDA

20

DIG GND

ATT

26

ROUT

AMP

AMP

5.6nF

TREBLE-L

18

OFF

SURR

TREBLE

TREBLE

SURR

OFF

Vref

TREBLE-R

5.6nF

100nF

IN(L)

98

30K

SYMULATED

L+R

30K

1110

IN(R)

PS1

17

RPS1

PS1

90Hz

MUSIC/

SYMULATED

SUPPLY

AGND

MIXING

MIXING

CREF

22 F

MUSIC

-

L-R

+

OFF

LPF

EFFECT

9KHz

CONTROL

24 25 2316

LP

V

S

1.2nF

BA4560 (FIC4, HIC1) : Dual op amp.

1.Pin layout

1

OUT1

2

1-36

– IN1

+ IN1

EE

V

1ch

+

–

3

2ch

+

–

4

V

CC

8

OUT2

7

– IN2

6

+ IN2

5

L4959 (RIC1) : Voltage regulator

1.Pin layout

MX-K60/MX-K50

TAB CONNECTED TO PIN 6

2.Block diagram

2/10

V

S

EN 8V

EN 12V(a)

EN 12V(b)

8

7

5

REF
GEN

11
10

9
8
7
6
5
4
3
2
1

D97AU716A

OUT 12V(a)
V

S

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

Pin Pins Description

1 OUT 12V (b) 12V/1.3A SWITCHED OUTPUT VOLTAGE
2V

S

3 OUT 5.6V 5.6V/250mA OUTPUT VOLTAGE
4 N.C. not connected
5 EN 12V (b) Enable 12V/1.3A SWITCHED OUTPUT VOLTAGE
6 GND Ground
7 EN 12V (a) Enable 12V/0.8A SWITCHED OUTPUT VOLTAGE
8 EN 8.6V Enable 8.6V/0.6A SWITCHED OUTPUT VOLTAGE
9 OUT 8.6 8.6V/0.6A SWITCHED OUTPUT VOLTAGE

10 V

S

11 OUT 12V (a) 12V/0.8A SWITCHED OUTPUT VOLTAGE

Supply Voltage

Supply Voltage

GND

6

1-37

MX-K60/MX-K50

KA9258D (IC301) : 4-ch Motor driver

1.Block diagram

28 27 26 25 24 23 22 21 20 19 18 17 16 15

10K

T • S • D

+-

LEVEL SHIFT

10K

VCC VCC

10K

REGULATOR

10K

10K

1 2 3 4 5 6 7 8 9 10 11 12 13 14

10K

GND

10K

10K

50K

MUTE

LEVEL SHIFT

-+

GND

LA1837 (IC01) : FM IF/DET AM RF/IF/DET

1.Block diagram

1-38

LC86P6548 (UIC1) : Microcontroller

1.Pin layout

S47/PF7

S46/PF6

S45/PF5

S44/PF4

S43/PF3

S42/PF2

S41/PF1

S40/PF0

VDD4

S39/PE7

S38/PE6

S37/PE5

S36/PE4

S35/PE3

S34/PE2

S33/PE1

S32/PE0

S31/PD7

S30/PD6

S29/PD5

S28/PD4

S27/PD3

S26/PD2

S25/PD1

S24/PD0

S23/PC7

S22/PC6

S21/PC5

S20/PC4

VP

MX-K60/MX-K50

2.Block diagram

S48/PG0
S49/PG1
S50/PG2
S51/PG3

P00
P01
P02
P03

VSS2

VDD2

P04
P05
P06
P07

P10/SO0

P11/SI0/SB0

P12/SCK0

P13/SO1

P14/SI1/SB1

P15/SCK1

Interrupt Control

81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100

Standby Control

CF

RC

X’tal

8079787776757473727170696867666564636261605958575655545352

1234567891011121314151617181920212223242526272829

P30

P31

P32

P33

P34

P35

P36

P16/BUZ

P17/PWM0

Clock

Generator

P37

P70/INT0

RES

XT1/P74

CF1

VSS1

XT2/P75

CF2

VDD1

P80/AN0

P81/AN1

P82/AN2

IR PLA

PROM
Control

PROM(48KB)

PC

P83/AN3

P84/AN4

P85/AN5

A15-A0
D7-D0
TA
CE
OE
DASEC

P86/AN6

P87/AN7

P71/INT1

P72/INT2/T0I

51

50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31

30

S0/T0

P72/INT3/T0I

S19/PC3
S18/PC2
S17/PC1
S16/PC0
VDD3
S15/T15
S14/T14
S13/T13
S12/T12
S11/T11
S10/T10
S9/T9
S8/T8
S7/T7
S6/T6
S5/T5
S4/T4
S3/T3
S2/T2
S1/T1

Base Time

r

SIO0

SIO1

Timer 0

er 1

Tim

ADC

INT0-3

Noise Filter

SIO Auto

matic

transmission

RAM

128 by

s

te

VFD

Controller

High voltage Output

Bus Interface

Port 1

Port 3

Port 7

Port 8

ACC

B Register

C Register

A

PSW

RAR

RAM

Stack Poi nter

Port 0

Watchdog Timer

1-39

MX-K60/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.21069)

200203