JVC J570V Service Manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MX-J570V
MX-J680V

MX-J570V
MX-J680V

SOUND

VOCAL

MODE

MASKING

SLEEPECHO

FM MODE

V.INTRO

STILL

SUBTITLEHIGHLIGHT

TAPE

A/B

REC

START/STOP

ACTIVE
BASS EX.

ON SCREEN

NEXTPREV

KEY CONTROL

FADE
MUTING

RM—SMXJ570V REMOTE CONTROL

Each difference point

Model CD/DECK/RECEIVER SPEAKER

MX-J570V CA-MXJ570V

MX-J680V CA-MXJ680V

SP-MXJ570V
SP-MXJ680V

Area Suffix

UT Taiwan

SUPER VIDEO

COMPACT

DIGITAL VIDEO

COMPACT

SUPER VIDEO

COMPACT

DIGITAL AUDIO

Color

Tray fitting

Silver

Panel

Silver & Blue Silver

Champagne-gold Champagne-gold

Net Front

Light blue

Gray

Contents

Safety precautions
Important for laser products
Preventing static electricity
Precautions at disassembly
and parts replacement
Disassembly method
Adjustment method

COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.

1-2
1-3
1-4

1-5
1-6
1-29

Diagnosis which uses
extension wire method
Flow of functional operation
until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs

1-33

1-34
1-35
1-35
1-36

No.20889

Dec. 2000

MX-J570V/MX-J680V

Safety Precautions

1. This design of this product contains special hardware and many circuits and components specially
for safety purposes. For continued protection, no changes should be made to the original design
unless authorized in writing by the manufacturer. Replacement parts must be identical to those
used in the original circuits. Services should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the product should not be made. Any design alterations of
the product should not be made. Any design alterations or additions will void the manufacturer`s
warranty and will further relieve the manufacture of responsibility for personal injury or proper ty
damage resulting therefrom.

3. Many electrical and mechanical par ts 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 or iginal 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 eachexposed metal
part, par ticularly 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.

Warning

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

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

3. Repairs must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

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.

1-2

CAUTION

!

Important for laser products

MX-J570V/MX-J680V

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.

VARNING : Osynlig laserstrålning är denna del är öppnad

och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet

alttiina näkymättömälle lasersäteilylle.Älä katso
säteeseen.

5.CAUTION : If safety switches malfunction, the laser is able
to function.

6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.

CAUTION

!

Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.

ADVARSEL : Usynlig laserstråling ved åbning , når

sikkerhedsafbrydere er ude af funktion. Undgå
udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når

sikkerhetsbryteren er avslott. unngå utsettelse
for stråling.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

CLASS 1
LASER PRODUCT

DANGER : Invisibie laser radiation
when open and interlock or
defeated.
AVOID DIRECT EXPOSURE TO
BEAM (e)

VARO : Avattaessa ja suojalukitus
ohitettaessa olet alttiina
näkymättömälle lasersäteilylle.Älä
katso säteeseen. (d)

VARNING : Osynlig laserstrålning är
denna del är öppnad och spårren är
urkopplad. Betrakta ej strålen. (s)

ADVARSEL :Usynlig laserstråling
ved åbning , når
sikkerhedsafbrydere er ude af
funktion. Undgå udsættelse for
stråling. (f)

1-3

MX-J570V/MX-J680V

Preventing static electricity

1. Grounding to prevent damage by static electricity

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

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

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

2-1 Ground the workbench

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

2-2 Ground yourself

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

(caption)
Anti-static wrist strap

Conductive material
(conductive sheet) or iron plate

3. Handling the optical pickup

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

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

4. Handling the traverse unit (optical pickup)

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

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

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

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

Attention when traverse unit is decomposed

*Please refer to "Disassembly method" in the text for pick-up and how to
detach the CD traverse mechanism.

CD changer
mechanism

assembly

1. Remove the disk stopper and T. bracket on the CD changer mechanism
assembly.

2. Disconnect the harness from connector on the CD motor board.

3. CD traverse unit is put up as shown in Fig.1.

4. Solder is put up before the card wire is removed from connector CN601
on the CD servo control board as shown in Fig. 2.
(When the wire is removed without putting up solder, the CD pick-up
assembly might destroy.)

5. Please remove solder after connecting the card wire with CN601 when
you install picking up in the substrate.

1-4

CD traverse

unit

Flexible cable

Fig.1

Soldering

Fig.2

Precautions at disassembling and parts replacement

This model is charged with electricity on the power board
even if the power cord is unplugged.
Therefore, always discharge electricity in accordance with
the steps given below before starting disassembling of the
unit and/or replacement of parts.

1.

2.

While referring to the disassembling steps, remove the
metal cover and the CD changer mechanism.

Set electrical resistances of 1kohm 1/4W to the places
between the + and - terminals of the respective condensers
C204 and C205 on the power board, and discharge electricity
for 4 ~ 5 seconds.

Power board

C205

C204

MX-J570V/MX-J680V

1-5

MX-J570V/MX-J680V

Disassembly method

<Main body>

Removing the metal cover

(See Fig.1 to 3)

1.

Remove the six screws A attaching the metal cover
on the back of the body.

2.

Remove the two 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.

ATTENTION:

Do not break the front panel tab fitted
to the metal cover.

A

Metal cover

AA

Fig.1

Metal cover

B

Fig.2

Metal cover

Fig.3

B

1-6

MX-J570V/MX-J680V

CD changer
mechanism board

CD changer
mechanism assembly

Main board

CN868

C

Input / output board

CN871

CN870

Rear panel

Front panel assembly

Fig.5

Fig.6

Fig.4

Front panel assembly

CD changer
mechanism assembly

Rear panel

C

Rear panel

D

G

E

CD Optical

digital output

terminal

TW100

CN102

Video CD board

Bracket

CLAW a

Fig.7

H

I

CD changer
mechanism assembly

Video CD board

F

Video out board

Video CD board

CLAW b

CN100

CN101

Prior to performing the following procedure, remove
the metal cover.

For the card wire connecting the CD changer
mechanism board and the main board, disconnect it
from connector CN868 on the main board.

Remove the two screws C attaching the CD changer
mechanism assembly on both sides of the body.

Remove the two screws D attaching the CD changer
mechanism assembly to the rear panel. Remove
the screw E attaching the AUX terminal on the back
of the body.

Remove the screw F attaching the video out terminal
on the back of the body. Then disconnect it from
connector CN102 on the video CD board, and pull
out the earth wire TW100 on the video CD board.

Pull the top of rear panel and the front panel
assembly outward respectively, then remove the CD
changer mechanism assembly and video out board
by lifting the rear part of the CD changer mechanism
assembly.

1.

2.

3.

4.

5.

Removing the CD changer mechanism
assembly (See Fig.4 to 6)

Prior to performing the following procedure, remove
the CD changer mechanism assembly.

Reverse the CD changer mechanism assembly.
Remove the two screws H attaching the bracket.
Remove the screw I attaching the video CD board.
Disconnect the card wire from connector CN100 and

CN101 on the video CD board.
At first, remove the claw a. Then remove the claw b

while raising the video CD board in the direction of
the arrow mark as figure. After removing the claw b,
you can removing the video CD board by pulling it
backward.

1.

2.

3.

4.

5.

Removing the video CD board
(See Fig.7)

1-7

MX-J570V/MX-J680V

Removing the front panel assembly

(See Fig.8 to 10)

Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.

1.

Disconnect the card wire from connector CN865 on
the main board and pull out the earth wire on the
main board.

2.

Disconnect the card wire from connector CN315 on
the input / output board.

3.

Disconnect the harness from connector CN912 on
the input / output board.

4.

Disconnect the harness from connectors CN900 and
CN901 on the relay board on the back of the front
panel assembly respectively.

5.

Disconnect connector CN870 and CN871 on the
input/output board from the main board respectively.

Front panel assembly

Front panel assembly

Fig.8

CN871

J

CN870

6.

Remove the four screws J attaching the front panel
assembly on the bottom of the body.

7.

Release the two joints b and c on the lower part of
the sides using a screwdriver, and remove the front
panel assembly toward the front.

Main board

CN865

CN912

CN315

Joint b

Earth wire

Fig.9

Main board

CN865

Input / output board

Front panel assembly

1-8

Relay board

Joint c

CN900
CN901

Fig.10

<Front panel assembly>

Removing the Microphone terminal board
assembly (See Fig.11 and 12)

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

1.

Pull out the MIC volume knob from the front side.

2.

Remove the screw K attaching earth wire. then
release the earth wire from the clamp on the upper
part of the cassette mechanism assembly.

3.

Remove the two screws L attaching the microphone
terminal board assembly.

4.

Remove the microphone terminal board assembly
toward you.

MIC Volume knob

Microphone

terminal board

assembly

MX-J570V/MX-J680V

Fig.11

M

Removing the rolling panel assembly

(See Fig.12 and 13)

Prior to performing the following procedure, remove
the microphone terminal boare .

1.

Disconnect the harness from connector CN900 and
CN906 on the relay board on the back of the rolling
panel assembly.

2.

Disconnect the harness from connector CN862,
CN863, CN850, CN851 and CN815 on the main
board respectively. Disconnect the card wire from
connector CN880 on the main board.

3.

Disconnect the card wire from connector CN869 and
the harness from CN883 and CN884 on the main
board respectively.

4.

Remove the four screws M attaching the rolling
panel assembly.

Main board

M

M

Relay board

CN900

Cassette mechanism
assembly

CN883,CN884

Relay board

CN906

Fig.12

CN869

L

L

M

K

Rolling panel assembly

CN815

Main board
CN850,CN851

Main board
CN862,CN863

5.

Remove the rolling panel assembly toward you.

ATTENTION:

For the harness which should be
connected to connector CN869,
CN883 and CN884 on the main board,
get them through the slots under the
rolling panel when reattaching the
rolling panel assembly to the front
panel (Refer to Fig.13)

Rolling panel
assembly

Main board

CN880

Relay board

CN906

Fig.13

1-9

MX-J570V/MX-J680V

Removing the main board

(See Fig.14 and 15)

Prior to performing the following procedure, remove
the front panel assembly, the microphone terminal
board and the rolling panel assembly.

1.

Disconnect the harness from connector CN867 on
the main board.

2.

Disconnect the card wire from connector CN879 on
the main board (Before pulling out the card wire,
stand the part d of CN879 as shown in Fig.15).

3.

Remove the two screws N attaching the main board.

Removing the cassette mechanism
assembly (See Fig.16)

Rolling panel
assembly

N

CN867

CN879

Main board

N

Fig.14

d

CN879

Fig.15

Prior to performing the following procedure, remove
the front panel assembly.

1.

Disconnect the card wire from connector CN306 on
the cassette mechanism board.

2.

Remove the eight screws O and P attaching the
cassette mechanism assembly.

3.

Pull out the cassette mechanism assembly toward
you.

O

P

CN306

P

P

Cassette mechanism board

Fig.16

O

P

1-10

Prior to performing the following procedure, remove
the front panel assembly, the microphone terminal
board assembly and the rolling panel assembly.

Function board1 (See Fig.17)

Remove the two screws Q attaching the function
board 1.

Function board2 (See Fig.17)

Remove the two screws R attaching the function
board 2.

Bass-level regulator board (See Fig.18)

Pull out the bass-level knob on the front side of the
front panel assembly and remove the nut attaching
the bass-level regulator board.

Release the two joints e. Unsolder FW951 on the
bass-level regulator board and disconnect the
harness connected to the power switch board.

Main volume & headphone board (See Fig.18)

Pull out the volume knob on the front side of the front
panel assembly and remove the nut attaching the
main volume & headphone board.

Remove the two screws S attaching the main volume
& headphone board on the back of the front panel
assembly and release the two joints f.

Remove the screw P attaching the earth wire
extending from the main volume & headphone
board.

Unsolder FW850 on the main volume & headphone
board and disconnect the harness connected to the
eject switch board.

1.

1.

1.

2.

1.

2.

3.

4.

Removing the boards in the front panel
assembly (See Fig.17 and 18)

Fig.17

Fig.18

Q

Function

board 1

Q

Function

board 2

R

R

FW850

FW951

Eject switch board

Joints f

S

Main volume & headphone board

P

Power switch board

Joints e

Bass-level
regulator board

Cassette mechanism assembly

MX-J570V/MX-J680V

1-11

MX-J570V/MX-J680V

Power switch board (See Fig.19)

1.

Remove the two screws T attaching the power
switch board. Unsolder FW951 on the power switch
board and disconnect the harness extending to the
bass-level regulator board.

Eject switch board (See Fig.19)

1.

Remove the four screws U attaching the eject switch
board. Unsolder FW850 on the eject switch board
and disconnect the harness extending to the main
volume & headphone board.

Remote control port board (See Fig.19)

1.

Remove the screw V attaching the remote control
port board.

Removing the relay board and fixing
board (See Fig.20)

Eject swith

board

FW850

U

Remote control port board

U

V

Fig.19

T

Power swith

board

FW951

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

There is no need to remove the front panel
assembly.

1.

Disconnect the harness from connector CN900,
CN901, CN905 and CN906 on the relay board on the
back of the rolling panel assembly.

2.

Remove the screw W attaching the relay board.
Remove the relay board from the groove g.

3.

Remove the screw X attaching the fixing board and
remove the fixing board from the groove h.

CN900

CN901

Groove g

W

CN905

CN906

Rolling panel assembly

X

Fixing board

Groove h

Relay board

Fig.20

1-12

MX-J570V/MX-J680V

Prior to performing the following procedure, remove
the metal cover and CD changer mechanism
assembly.

Remove the two plastic rivets attaching the joint
board, and remove the joint board.

Disconnect the card wire from connector CN1 on the
tuner board.

Remove the two screws Y attaching the tuner board
on the back of the body.

1.

2.

3.

Removing the tuner board

(See Fig.21 and 22)

<Rear panel assembly>

Prior to performing the following procedure, remove
the metal cover and CD changer mechanism
assembly.

Remove the two plastic rivets attaching the joint
board, and remove the joint board.

Disconnect the card wire from connector CN315 on
the input / output board.

Disconnect the harness from connector CN912 on
the input / output board.

Remove the screw Z attaching the input / output
board on the lower side of the body.

Disconnect connector CN612, CN870, CN871,
CN711 and CN712 on the input / output board and
pulling out them outward. Remove the input / output
board from the body.

1.

2.

3.

4.

5.

Removing the input / output board

(See Fig.21 and 22)

Fig.21

Fig.22

Tuner board

Plastic rivets

Joint board

Input / output board

Rear panel

CN1

CN871

CN870

Z

CN711

CN712

CN315

Rear panel

Y

E

G

CN912

CN612

1-13

MX-J570V/MX-J680V

Removing the rear cover / rear panel

(See Fig.23 to 26)

Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.

There is no need to remove the front panel
assembly.

1.

Remove the two screws A attaching the rear cover
on the back of the body.

2.

Remove the screw E attaching the AUX terminal
board and the rear panel on the back of the body.

3.

Remove the screw G attaching the digital output
terminal.

4.

Remove the seven screws B attaching the heat sink
and the pre-amplifier board to the rear panel on the
back of the body.

5.

Remove the two screws C attaching the voltage
selector on the back at the body.

Rear cover

CD optical

digital output

terminal

Rear panel

A

Fig.23

D

6.

Remove the three screws D attaching the antenna
terminal and the rear panel to the chassis base on
the back of the body.

7.

Release the two joints i and j on the rear panel
bottom using a screwdriver, and detach the rear
panel backward.

Rear panel

G

B

E

B

Fig.24

D

B

C

B

Rear panel

1-14

Fig.26

Joint j

Joint i

Fig.25

Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly and the rear cover / rear panel.

There is no need to remove the front panel
assembly.

Remove the input / output board (Refer to Fig.21 and

22).
Disconnect the harness from connector CN713 on

the pre-amplifier board.
Remove the two screws E attaching the heat sink to

the power & main amplifier board on the back of the
body.

Remove the two screws F attaching the pre-amplifier
board to the heat sink and detach them with the heat
sink bracket.

1.

2.

3.

4.

Removing the pre-amplifier board / heat
sink (See Fig.27 to 29)

Fig.27

Fig.28

Fig.29

Pre-amplifier board

CN713

Relay board

CN901

Pre-amplifier board

Power & main
amplifier board

Heat sink

E

Heat sink

Pre-amplifier board

Bracket

F

MX-J570V/MX-J680V

1-15

MX-J570V/MX-J680V

Removing the power & main amplifier
board (See Fig.30 and 31)

Prior to performing the following procedure, remove
the metal cover, the CD changer mechanism
assembly, the front panel assembly, the rear cover /
rear panel, the tuner board, the input / output board
and pre-amplifier board.

1.

Remove the four screws G attaching the transf. on
the power & main amplifier board through the upper
side slots.

2.

Remove the two plastic rivets fixing the power &
main amplifier board.

3.

Remove the cord stopper by pushing it upward.

4.

Cut off the bands k and l fixing the power cord and
unsolder the soldered part on the power & main
amplifier board.

Power & main
amplifier board

Plastic rivet

G

Fig.30

Plastic rivet

G

G

Power & main amplifier board

Cord stopper

Band k

Fig.31

Soldered part

Band l

1-16

MX-J570V/MX-J680V

Prior to performing the following procedure, remove
the metal cover, CD changer mechanism assembly,
the front panel assembly, the microphone terminal
board assembly, the rolling panel assembly and the
main board.

Remove the two screws H attaching the multi-control
assembly on both sides.

Remove the multi-control assembly outward while
pushing, pull the right and left hooks fixing multi­control assembly outward respectively.

1.

2.

Removing the multi-control assembly

(See Fig.32 to 34)

<Rolling panel assembly>

Prior to performing the following procedure, remove
the multi-control assembly.

Remove the four screws I attaching the cover and
the bracket.

Pull out the right and left panel holders outward
respectivery by releasing the tabs m outward.

Remove the cover and the bracket.
Remove the four screws J attaching the multi-control

board.

1.

2.

3.

4.

Removing the multi-control board

(See Fig.35 to 37)

H

Multi-control assembly

Multi-control assembly

H

Fig.35

Fig.36Fig.37

Fig.34

Fig.32

Fig.33

Multi-control assembly

Hook

Bracket

Bracket

II

Cover

Bracket

Tab m

Panel holder

J

Multi-control board

1-17

MX-J570V/MX-J680V

Removing the drive motor assembly

(See Fig.38 to 40)

Prior to performing the following procedure, remove
the metal cover, CD changer mechanism assembly,
the front panel assembly, the microphone terminal
board assembly, the rolling panel assembly and the
main board.

1.

Remove the relay board / fixing board (Refer to
Fig.20).

2.

Remove the two screws K attaching the motor
bracket and remove the motor lead staple n.

3.

Remove the two screws L attaching the shaft
bracket.

4.

Remove the motor belt.

5.

Remove the three screws M attaching the side
bracket.

6.

Remove the shaft assembly from the rolling panel
assembly by lift up the shaft assembly upward.

CN900

CN901

Groove g

Relay board

Rolling panel assembly

W

X

Fixing board

Groove h

Fig.20

7.

Remove the drive motor upward.

Side bracket

W

Relay board

L

Shaft bracket

Fig.38

Motor lead staple n

Fig.39

Fixing board

K

Motor bracket

X

Motor belt

1-18

Fig.40

M

Shaft assembly

Drive motor

Fig.39

MX-J570V/MX-J680V

Prior to performing the following procedure, remove
the metal cover and the CD changer mechanism
assembly.

Disconnect the card wire from connector CN101 and
CN102 on the super VCD control board.

Remove the two plastic rivets attaching the super
VCD control board.

1.

2.

Removing the super VCD control board

(See Fig.41)

Fig.42

CD changer

mechanism assembly

Super VCD control board

Plastic rivet Plastic rivet

CN101

CN102

1-19

MX-J570V/MX-J680V

Removing the CD Servo control board
(See Fig.1)

1.Remove the metal cover.

2.Remove the CD changer mechanism assembly.

3.From bottom side the CD changer mechanism assembly,
remove the two screws A retaining the CD servo control
board.

4.Absorb the four soldered positions "a" of the right and
left motors with a soldering absorber.

5.Pull out the earth wire on the CD changer mechanism
assembly.

6.The two screws B is removed and C.B.holder is detached.

7.Disconnect the connector CN854 on the CD servo
control board.

8.Disconnect the card wire CN601 and the connector
CN801 on the CD servo control board.

A

a

a

CN854

A

CN651

CD servo control board

CN652

CN801

CN601

CN151

Removing the CD tray assembly
(See Fig.2~4)

Remove the front panel assembly.

1.
Remove the CD changer mechanism assembly.

2.
Remove the CD Servo control board.

3.
Remove the screw C retaining the lod stopper

4.
(Only ver.J/C).
From the T.bracket section "b" and clamper base

5.
section "c" , remove both of the edges fixing the
rod(See Fig.2 and 3).
Remove the screw D retaining the disc stopper

6.
(See Fig.3).
Remove the three screws E retaining the T.bracket

7.
(See Fig.3).
Remove the screw F retaining the clamper assembly

8.
(See Fig.3).
From the left side face of the chassis assembly, remove

9.
the one screw G retaining both of the return spring and
lock lever(See Fig. 4).

10.

By removing the pawl at the section "d" fixing the return
spring, dismount the return spring(See Fig.4).

11.

Remove the three lock levers(See Fig.4).

T.Braket

Disc stopper

D

Earth

wire

B

B

C.B.Holder

Fig.1

Clamper base

b

Rod

c

T.Braket

Fig.2

d

EE

C

a

Lod stopper
(Only ver.J/C)

E

F

b

Lock lever

Fig.4

1-20

Clamper ass'y

Fig.3

Return spring

G

MX-J570V/MX-J680V

11.

12.

Check whether the lifter unit stopper has been caught
into the hole at the section "e" of CD tray assembly as
shown in Fig.5.
Make sure that the driver unit elevator is positioned as
shown in Fig.6 from to the second or fifth hole on the
left side face of the CD changer mechanism assembly.

Fig.5

Fig.7

Fig.6

Fig.8

Fig.9

[Caution]

In case the driver unit elevator is not at above
position, set the elevator to the position as
shown in Fig.7 by manually turning the pulley
gear as shown in Fig.8.

13.

14.

15.

Manually turn the motor pulley in the clockwise
direction until the lifter unit stopper is lowered from the
section "e" of CD tray assembly(See Fig.8).
Pull out all of the three stages of CD tray assembly in
the arrow direction "f" until these stages stop
(See Fig.6).
At the position where the CD tray assembly has
stopped, pull out the CD tray assembly while pressing
the two pawls "g and g' " on the back side of CD tray
assembly(See Fig.9). In this case, it is easy to pull out
the assembly when it is pulled out first from the stage
CD tray assembly.

CD tray
assembly

e

Drive unit of elevator

CD tray assembly

f

Refer to Fig.7

Pawl

Chassis assembly

Pulley gear

Motor pulley

Pawl ,

CD tray assembly

Stopper

g

g

g'

1-21

MX-J570V/MX-J680V

Removing the CD loading mechanism
assembly(See Fig.10)

1.2.While turning the cams R1 and R2 assembly in the
arrow direction "h" ,align the shaft "i" of the CD loading
mechanism assembly to the position shown in Fig.10.
Remove the four screws H retaining the CD loading
mechanism assembly.

Removing the CD traverse mechanism
(See Fig.11 and 12 )

For dismounting only the CD traverse mechanism

1.
without removing the CD loading mechanism assembly,
align the shaft "j" of the CD loading mechanism
assembly to the position shown Fig.11 while turning the
cam R1 and R2 assembly in the arrow direction "k" .
By raising the CD loading mechanism assembly in the

2.
arrow direction "l", remove the assembly from the lifter
unit

Cam R1, R2 assembly

Cams R1, R2 assembly

Arrow

h

i

H

H

CD loading mechanism assembly

Fig.10

H

H

CD traverse mechanism

Arrow

j

Fig.11

Removing the CD pick unit
(See Fig.13 )

1.

Move the cam gear in the arrow direction "m" . Then,
the CD pickup unit will be moved in the arrow direction
"n" .
According to the above step, shift the CD pickup unit to

2.
the center position.
While pressing the stopper retaining the shaft in the

3.
arrow direction "o" , pull out the shaft in the arrow
direction "p".
After dismounting the shaft from the CD pickup unit,

4.
remove the CD pickup unit

1-22

k

Lifter unit

o

Stopper

Shaft

Fig.12

CD Pickup unit

n

m

Shaft

p

Stopper

Fig.13

Arrow

CD loading

mechanism

Shaft

Cam gear

k

Removing the cam unit
(See Fig.14 ~17 )

1.

Remove the CD loading mechanism assembly.

2.

While turning the cam gear "q", align the pawl "r"
position of the drive unit to the notch position(Fig.15) on
the cam gear "q".
Pull out the drive unit and cylinder gear(See Fig.16).

3.
While turning the cam gear "q", align the pawl "s"

4.
position of the select lever to the notch position(Fig.17)
on the cam gear "q".
Remove the four screws J retaining the cam unit(cam

5.
gear "q" and cams R1/R2 assembly)(See Fig.17).

MX-J570V/MX-J680V

Chassis assembly

CN801

CN802

Fig.14

Drive unit

Tray select
switch board

Cylinder gear

CN804

Drive unit

r

I

Cam gear q

Cam gear q

Fig.15

J

Cams R1, R2 assembly

Cam unit

Fig.16

J

J

s

Select lever

Fig.17

1-23

MX-J570V/MX-J680V

Removing the actuator motor and belt
(See Fig.18~21)

1.

Remove the two screws K retaining the gear bracket
(See Fig.18).

2.

While pressing the pawl "t" fixing the gear bracket in the
arrow direction, remove the gear bracket
(See Fig.18).
From the notch "u section" on the chassis assembly

3.
fixing the edge of gear bracket, remove and take out the
gear bracket(See Fig. 19).
Remove the belts respectively from the right and left

4.
actuator motor pulleys and pulley gears(See Fig. 18).
After turning over the chassis assembly, remove the

5.
actuator motor while spreading the four pawls "v" fixing
the right and left actuator motors in the arrow
direction(See Fig. 20).

[Note]

When the chassis assembly is turned over under
the conditions wherein the gear bracket and belt
have been removed, then the pulley gear as well
as the gear, etc. constituting the gear unit can
possibly be separated to pieces. In such a case,
assemble these parts by referring to the assembly
and configuration diagram in Fig. 21.

Chassis assembly

Pulley gear

Gear bracket

Belt

Motor pulley

K

Fig.18

Actuator motor

Pulley gear
Belt

Motor pulley

K

Pawl

t

u

Gear bracket

Fig.19

Assembly and Configuration Diagram

Pulley gear

Gear B

v

v

Fig.20

Pulley gear

Gear B

Cylinder gear

1-24

Gear C

Select gear

Gross gear L

Fig.21

Gross gear U

Gear C

MX-J570V/MX-J680V

Fig.22

[Caution]

To reassemble the cylinder gear, etc.with the
cam unit (cam gear and cans R1/R2 assembly),
gear unit and drive unit, align the position of the
pawl "x" on the drive unit to that of the notch on
the cam gear "q". Then, make sure that the
gear unit is engaged by turning the cam gear
"q" (See Fig. 23).

Removing the cams R1/R2 assembly
and cam gear q(See Fig.22)

1.

2.

3.

4.

Remove the slit washer fixing the cams R1 and R2
assembly.
By removing the two pawls "w" fixing the cam R1,
separate R2 from R1.
Remove the slit washer fixing the cam gear "q".
Pull out the cam gear "q" from the C.G. base assembly.

Removing the C.G. base assembly
(See Fig.22 and 23)

Remove the three screws L retaining the C.G. base
assembly.

Fig.23

Slit washer

Pawl

Cam R2

Slit washer

Cam gear q

Cam switch board

C.G. base assembly

Cam R1

Pawl

Cam gear q

Notch

Cylinder
gear

Gear bracket

Cam R1, R2 assembly

Gear unit

Drive unit

x

Pawl

w

w

L

1-25

MX-J570V/MX-J680V

< Cassette mechanism section >

Removing the playback,recording and eraser
heads (See Fig.1~3)

1. While shifting the trigger arms seen on the right
side of the head mount in the arrow direction,turn
the flywheel R in counterclockwise direction until
the head mount has gone out with a click
(See Fig. 1).

2. When the flywheel R is rotated in counterclockwise
direction, the playback head will be turned in
counterclockwise direction from the position in
Fig.2 to that in Fig.3.

3. At this position, disconnect the flexible P.C.board
(outgoing from the playback head) from the
connector CN301 on the head amp. and mechanism
control P.C. board.

4. After dismounting the FPC holder,remove the
flexible P.C.board.

5. Remove the flexible P.C.board from the chassis
base.

6. Remove the spring "a" from behind the playback
head.

7. Loosen the reversing azimuth screw retaining the
playback head.

8. Take out the playback head from the front of the
head mount.

9. The recording and eraser heads should also be
removed similarly according to Steps 1~8 above.

Reassembling the playback, recording

and eraser heads (See Fig.2,3)

Cassette mechanism

Fig.1

Playback/Recording &
eraser head

Flexible
P.C.board

CN301

Head amplifier & mechanism
control P.C. board

Fig.2

Flywheel R

Trigger armHead mount

(Mechanism A side)

Spring "a"

Trigger arm

Flywheel R

(Mechanism A side)

1. Reassemble the playback head from the front of
the head mount to the position as shown in Fig.3.

2. Fix the reversing azimuth screw.

3. Set the spring a from behind the playback head.

4. Attach the flexible P.C.board to the chassis base,
and fix it with the FPC holder as shown in Fig.3.

5. The recording and eraser heads should also be
reassembled similarly according to Steps 1~4
above.

1-26

Playback head

Spring "a"

FPC holder

Fig.3

Reversing azimuth
screw

Head
mount

Flexible
P.C.board

CN302

Head amplifier &
mechanism control
P.C. board

(Mechanism B side)

Removing the head amp.and mechanism
control P.C.board (See Fig. 4)

MX-J570V/MX-J680V

1.Remove the cassette mechanism assembly.

2.After turning over the cassette mechanism
assembly,remove the five screws "A" retaining
the head amp. and mechanism control P.C.
board

3.Disconnect the connectors CN303 and CN304
on the P.C.Board and the connectors CN1 on
both the right and left side reel pulse
P.C.Boards.

4.When necessary, remove the 4pin parallel
wire soldered to the main motor

Removing the capstan motor assembly

1.Remove the six screws "B" retaining capstan
motor assembly (See Fig. 5).

2.While raising the capstan motor, remove the
capstan belts A and B respectively from the
motor pulley (See Fig. 6).

A

Flexible
board

Head amplifier &
mechanism control board

AA

CN304

CN302 CN301

Flexible
board

CN303

Fig.4

BB

Capstan motor
assembly

AA

Caution 1: Be sure to handle the capstan
belts so carefully that these belts
will not be stained by grease and
other foreign matter. Moreover,
these belts should be hand while
referring to the capstan belt
hanging method.

Capstan
belt A

BBBB

Fig.5

Capstan motor

Capstan
belt B

Capstan
belt A

Capstan
belt B

Motor pulley

Fig.7 Fig.6

1-27

MX-J570V/MX-J680V

Removing the capstan motor (See Fig. 8)

From the joint bracket, remove the two screws "C"
retaining the capstan motor.

Removing the flywheel (See Fig. 9,10)

1.Remove the head amp. and mechanism control

P.C.Board.

2.Remove the capstan motor assembly.

3.After turning over the cassette mechanism, remove

the slit washers "a" and "b" fixing the capstan shafts
R and L, and pull out the flywheels R and L respectively
from behind the cassette mechanism.

C

Capstan motor

Joint
bracket

C

Fig.8

Flywheel R Flywheel L

Flywheel R Flywheel L

Fig.10

Removing the reel pulse P.C.board and solenoid
(See Fig. 11)

1.Remove the five pawls (c,d,e,f,g) retaining

the reel pulse P.C.Board.

2.From the surface of the reel pulse P.C.Board parts,

remove the two pawls "h" and "i" retaining the solenoid.

hi

Solenoid

c

a

Slit
washer "a"

d

Fig.9

e

f

b

Slit
washer "b"

g

Reel pulse board

1-28

Solenoid

Fig.11

Adjustment method

Measurement instruments required
for a djustment

1. Low frequency oscillator,
This oscillator should have a capacity to output 0dBs
to 600ohm at an oscillation frequency of 50Hz-20kHz.

2. Attenuator impedance : 600ohm

3. Electronic voltmeter

4. Frequency counter

5. Wow flutter meter

6. Test tape
VTT712 : For Tape speed and wow flutter ( 3kHz)
VTT724 : For Reference level (1kHz)
TMT7036 : For Head angle(10kHz),Play back frequency
characteristics(1kHz),and dubbing frequency
characteristics(63,1,10kHz)
Because of frequency-mixed tape with 63,1k,10k and
14kHz(250nWb/m -24dB).
Use this tape together with a filter.

7. Blank tape
TAPE : AC-225, TAPE : AC-514

8. Torque gauge : For play and back tension
Forward ; TW2111A, Reverse ; TW2121A
Fast Forward and Rewind ; TW2231A

9. Test disc
: CTS-1000(12cm),GRG-1211(8cm)

10. Jitter meter

Measurement conditions

Power supply voltage
AC110/127/220/230-240V(50Hz)

Measurement
output terminal : Speaker out
:TP101(Mesuring for TUNER/DECK/CD)
:Dummy load 6ohm

Radio input signal

AM modulation frequency : 400Hz
Modulation factor : 30%
FM modulation frequency : 400Hz
Frequency displacement : 22.5kHz

Frequency Range

AM 531kHz~1710kHz
FM 87.5MHz~108MHz

Standard measurement positions of volume
and switch

Power : Standby (Light STANDBY Indicator)
S,A,BASS : OFF
Sound mode : OFF
Main VOL. : 0 Minimum
Travers mecha set position : Disc 1
Mic MIX VOL : MAX
ECHO : OFF

Precautions for measurement

1. Apply 30pF and 33kohm to the IF sweeper output
side and 0.082 F and 100kohm in series to
the sweeper input side.

2. The IF sweeper output level should be made as
low as possible within the adjustable range.

3. Since the IF sweeper is a fixed device, there is
no need to adjust this sweeper.

4. Since a ceramic oscillator is used, there is no need
to perform any MPX adjustment.

5. Since a fixed coil is used, there is no need to adjust
the FM tracking.

6. The input and output earth systems are separated.
In case of simultaneously measuring the voltage
in both of the input and output systems with an
electronic voltmeter for two channels, therefore,
the earth should be connected particularly.

7. In the case of BTL connection amplifier, the minus
terminal of speaker is not for earthing. Therefore,
be sure not to connect any other earth terminal
to this terminal. This system is of an OTL system.

MX-J570V/MX-J680V

1-29

MX-J570V/MX-J680V

Arrangement of adjusting positions

Cassette mechanism section (Mechanism A section)

Head azimuth

adjusting screw

(Forward side)

Playback

head

Head azimuth

adjusting screw

(Reverse side)

Cassette mechanism section (Back side)

Head azimuth

adjusting screw

(Forward side)

Playback,recording and eraser

heads or playback head

Head azimuth

adjusting screw

(Reverse side)

Cassette mechanism unit section

Tape speed ADJ

Bias ADJ L

Bias ADJ R

1-30

1.Playback the test tape TMT7036(10kHz).

2.With the playback mechanism or recording
playback mechanism, adjust the head azimuth

screw so that the forward and reverse output
levels become maximum.After adjustment,lock
the head azimuth at least by half a turn.

3.In either case,this adjustment should be

performed in both the forward and reverse
directions with the head azimuth screw.

<Constant speed>
Adjust VR301 so that the frequency counter reading
becomes 3,000Hz

60Hz when playing back the
test tape VTT712(3kHz)with the playback mechanism
or playback and recording mechanism after ending
forward winding of the tape.

Confirmation
of head angle

Confirmation
of tape speed

Test tape
:TMT7036(10kHz)
Measurement
output terminal
:Speaker terminal
Speaker R
(Load resistor:3

)

:Headphone terminal

Test tape
:VTT712(3kHz) or
TMT7036(3kHz)
Measurement
output terminal
:Headphone terminal

Maximum
output

Tape speed
of decks
(A and B)
:3,000Hz

60Hz

Adjust the head
azimuth screw
only when the
head has been
changed.

VR301

Items Measurement

conditions

Measurement method

Standard

values

Adjusting

positions

Tape recorder section

Items Measurement

conditions

Measurement method

Standard

values

Adjusting

positions

After setting to the double speed motor, confirm
that the frequency counter reading becomes
4,800+400/-300Hz when the test tape VTT712
(3kHz) has been play back with the playback
mechanism.

When the test tape VTT712(3kHz) has been played
back with the playback mechanism or recording and
playback mechanism at the beginning of forward
winding, the frequency counter reading of the
difference between both of the mechanisms should
be 6.0Hz or less.

When the test tape VTT712(3kHz) has been played
back with the playback mechanism or recording and
playback mechanism at the beginning of forward
winding the frequency counter reading of wow
flutter should be 0.25 or less(WRMS).

Double tape
speed

Difference
between the
forward and
reverse speed.
P.mecha and
R/P mecha
speed

Wow

flutter

Test tape
:TMT7036(10kHz)
Measurement
output terminal
:Speaker terminal
Speaker R
(Load resistance:3

)
measurement
output terminal
:Headphone terminal

Test tape
:TMT7036(10kHz)
Measurement
output terminal
:Headphone terminal

4,800+400/

-300Hz

60Hz or
less

with in

0.25%
JIS(WTD)

Playback
mechanism side

Both the playback
and recording
playback
mechanism

Both the playback
and recording
playback
mechanism

Reference values for confirmation items

MX-J570V/MX-J680V

1-31

MX-J570V/MX-J680V

Electrical performance

Items Measurement

Adjustment of
recording bias
current
(Reference
value)

conditions
*Mode : Forward or
reverse mode
*Recording mode
*Test tape
:AC-514 and AC-225
Measurement output
terminal
:Both recording and
headphone terminals

Measurement method

1.With the recording and playback mechanism,
load the test tapes(AC-514 to TYP
TYP
pausing conditions in advance.

2.After connecting 100
head,measure the bias current with a valve
voltmeter at both of the terminals.

3.After resetting the [PAUSE] mode,start recording.
At this time,adjust VR101 for LcH and VR201 for
RcH so that the recording bias current values
become 4.0

),and set the mechanism to the recording and

in series to the recorder

A (TYP ) and 4.20 A(TYP ).

and AC-225 to

Standard

values
AC-225
:4.20
AC-514
:4.0

Adjusting

positions

LcH

A

:VR101
RcH

A

:VR201

Adjustment of
recording and
playback
frequency
characteristics

Reference frequency
:1kHz and 10kHz
(REF:-20dB)
Test tape
:TYP
Measurement input
terminal
:OSC IN

AC-514

1.With the recording and playback mechanism,load
the test tape(AC-514 to TYP ),and set the
mechanism to the recording and pausing condition
in advance.

2.While repetitively inputting the reference frequency
signal of 1kHz and 10kHz from OSC IN, record and
playback the test tape.

3.While recording and playing back the test tape in
TYP
so that the output deviation between 1kHz and
10kHz becomes -1dB

,adjust VR101 for LcH and VR201 for RcH

2dB.

Reference values for electrical function confirmation items

Items Measurement

Recording
bias frequency

conditions

*Recording and
playback side forward
or reverse
*Test tape
:TYP
*Measurement
terminal BIAS TP on
P.C.board

AC-514

1.While changing over to and from BIAS 1 and 2,
confirm that the frequency is changed.

2.With the recording and playback mechanism.
load the test tape (AC-514 to TYP
mechanism to the recording and pausing
conditions in advance.

3.Confirm that the BIAS TP frequency on the
P.C.board is 100kHz

Measurement method

),and set the

6kHz.

Output
deviation
between
1kHz and
10kH
:-1dB

Standard

values
100kHz
+9kHz

-7kHz

LcH
:VR101
RcH
:VR201

2dB

Adjusting

positions

Eraser current
(Reference
value)

1-32

*Recording and
playback side forward
or reverse
*Recording mode
*Test tape
:AC-514 and AC-225
Measurement terminal
Both of the eraser
head

1.With the recording and playback mechanism,
load the test tapes(AC-514 to TYP and AC-225
to TYP
and pausing condition in advance.

2.After setting to the recording conditions,connect
1M
and playback mechanism side,and measure the
eraser current from both of the eraser terminal.

),and set the mechanism to the recording

in series to the eraser head on the recording

TYP
:120mA
TYP
:75mA

Diagnosis which uses extension wire method

System control P.C.board

1.Remove the metal cover and CD changer mechanism.

2.Remove the front panel assembly.

3.One screw A is removed, and relay board is removed.

4.As shown in fig.1, place the front panel assembly after
opening it outward using the right side of the front panel as
an axis.

5.The extension wire is connected with CN870 & CN871 on
the INPUT/OUTPUT board and CN860 & CN861 on the
main board.

Extension wire parts No.

MX-J570V/MX-J680V

QUQ412-4020CJ

JIG-MXJ500

Input/output board

FLAT WIRE

CONNECTOR Board x 2

FLAT WIRE

CONNECTOR Board x 2

CN870

CN871

A

Relay board

Extension wire

Main board

Front panel assembly

CN860

CN861

Relay board

Fig.1

1-33

MX-J570V/MX-J680V

Flow of functional operation until TOC read

Power ON

Play Key

Slider turns REST
SW ON.

Automatic tuning
of TE offset

Check Point

Confirm that the voltage at the pin5
of CN801 is "H"\"L"\"H".

Tracking error waveform at TOC reading

Approx.3sec

Tracking
servo
off states

Automatic measurement
of TE amplitude and
automatic tuning of
TE balance

VREF

pin 25 of
IC601(TE)

Approx

1.8V

Disc states
to rotate

Tracking
servo
on states

Disc to be
braked to stop

TOC reading
finishes

500mv/div
2ms/div

Fig.1

Laser ON

Detection of disc

Automatic tuning of
Focus offset

Automatic measurement of
Focus S-curve amplitude

Disc is rotated

Focus servo ON
(Tracking servo ON)

Automatic measurement of
Tracking error amplitude

Automatic tuning of
Tracking error balance

Check that the voltage at the
pin40 of IC651 is + 5V?

Confirm that the Focus error
S-cuve signal at the pin28 of
IC651 is approx.2Vp-p

Confirm that the signal from
pin24 IC651 is 0V as a
accelerated pulse during
approx.400ms.

Confirm the waveform of
the Tracking error signal.
at the pin 25 of IC601 (R604)
(See fig-1)

1-34

Automatic tuning of
Focus error balance

Automatic tuning of
Focus error gain

Automatic tuning of
Tracking error gain

TOC reading

Play a disc

Confirm the eys-pattern
at the lead of TP1

MX-J570V/MX-J680V

Maintenance of laser pickup

(1) Cleaning the pick up lens
Before you replace the pick up, please try to
clean the lens with a alcohol soaked cotton
swab.

(2) Life of the laser diode
When the life of the laser diode has expired,
the following symptoms will appear.

1. The level of RF output (EFM output:ampli
tude of eye pattern) will below.

Is the level of

RFOUT under

1.25V 0.22Vp-p?

YES

O.K

NO

Replace it.

Replacement of laser pickup

Turn off the power switch and,disconnect the
power cord from the ac outlet.

Replace the pickup with a normal one.(Refer
to "Pickup Removal" on the previous page)

Plug the power cord in,and turn the power on.
At this time,check that the laser emits for
about 3seconds and the objective lens moves
up and down.
Note: Do not observe the laser beam directly.

Play a disc.

Check the eye-pattern at TP1.

Finish.

(3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is
attached to the pickup is used to adjust the laser power.Since this adjustment should be performed to match the
characteristics of the whole optical block, do not touch the semi-fixed resistor.
If the laser power is lower than the specified value,the laser diode is almost worn out, and the laser pickup should
be replaced.
If the semi-fixed resistor is adjusted while the pickup is functioning normally,the laser pickup may be damaged
due to excessive current.

1-35

MX-J570V/MX-J680V

Description of major ICs

AN8806SB-W (IC601) : RF&Servo AMP

1.Pin layout

PD
LD
LDON
LDP
VCC
RF-
RF OUT
RF IN

C.AGC
ARF
C.ENV

C.EA

CS BDO

BDO
CS BRT
OFTR
/NRFDET

GND

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18

36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19

PDAC
PDBD
PDF
PDE
PDER
PDFR
TBAL
FBAL
EF­ EF OUT
TE­ TE OUT
CROSS
TE BPF
VDET
LD OFF
VREF
ENV

2.Block diagram

36

-­+

35

-­+

31

34

-­+

32

33

-­+

6

--

VCBA

+

29

728

-­+

--

+

+

VCBA

--

+

VCBA

--

--

VCBA

+

+

--

-­+

-­+

+

--

27

-­+

--

EQ

+

+

--

+

--

910 17

8

AGC

OFTR

BDO

RF
DET

11

12 19

ENV CURCUIT

13
14

15

16

-­+

20

21

2

1-36

24 25

30

23

26

22

14

3

35
36

34

33

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

3. Pin function

PD AC

FBAL
TBAL

PDFR

PDER

PDF
PDE

PD BD

TE BPF

VDET

CROSS
TE OUT

TE-

FE OUT

FE-

/NRFDET

GND

LD OFF

VREF

ENV

OFTR

C.AGC

ARF

C.ENV

C.EA

CS BDO

BDO

CS BRT

LD

LD ON

LDP

VCC

RF-

RF OUT

RF IN

PD

Pin No.

Symbol

I/O

I

O

I

--

-­I

O

I

I/O

O
I/O
I/O

I/O

O
I/O

O

O

--

O

O

-­O

I
O
O

I

O

I

I

I

I/O
I/O

I

I

I

I I-V amp input

I-V amp input
I-V amp input

I-V amp input

E I-V amp gain control

F I-V amp gain control

Tracking balance control

Focus balance control

Inverse input pin for focus error amp

Output pin of focus error

Inverse input pin for tracking error amp

Tracking error signal output

Tracking error cross output

Input pin of tracking error through BPF

Vibration detection signal output

Connect to ground

Reference voltage output

Description

APC amp input terminal
APC amp output terminal

APC ON/OFF control terminal

Envelope output

Ground

RF detection signal output

Of-track status signal output

BDO output pin

A capacitor is connected to this terminal to detect the envelope of RF signal

RF output

Connecting pin of AGC loop filter

RF input

RFamp output

Inverse input pin for RF amp

Power supply

Connect to ground

A capacitor is connected to this terminal to detect the envelope of RF signal

A capacitor is connected to detect the lower envelope of RF signal

A capacitor is connected to detect the lower envelope of RF signal

MX-J570V/MX-J680V

1-37

MX-J570V/MX-J680V

BA15218 (IC526) : OP AMP.

1OUT1

2-IN1

­1

3+IN1

+

-

2

EE

4

+

BA3126N (IC301) : SWITCH

1. Terminal layout and Block diagram

8

7

6

5V

VCC

OUT2

-IN2

+IN2

1

REC SW

2

GND

CONT.

P / B SW

543

GND

6

VCC

7

P / B SW

89

GND

REC SW

GP1U281X (IC915) : Receiver for remote controller

+
–

Amp.

Limiter Integrator Comparator

B.P.F

Demodulator

GND

VCC Vout

1-38

BA3835S (IC812) : SPI B.P.F.

1.Block Diagrams

MX-J570V/MX-J680V

BIASC

VREFC

RREF

DIFOUT

N.C.

N.C.

CIN

AIN

VCC

1

2

3

4

5

6

7

8

9

2.Pin Function
No. Symbol

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18

BIASC

VREFC

RPEF

NC
NC

NC
CIN
AIN

VCC
SPI-A
SPI-B
SPI-C

SPICSB

NC
NC

TEST

AOUT

GND

A-C

DIF

105Hz
BPF

340Hz
BPF

1kHz
BPF

3.4kHz
BPF

10.5kHz
BPF

REFERENCE
CURRENT

PEAK
HOLD

PEAK
HOLD

PEAK
HOLD

PEAK
HOLD

PEAK
HOLD

I/O

-

-

-

-

-

-

­I

­O
O
O
O

-

-

­O

-

BIAS

VREF

RES

RES

MPX

RES

RES

RES

DEC

18

17

16

15

14

13

12

11

10

GND

AOUT

TEST

N.C.

N.C.

SEL

C

B

A

Function
Decoupling condenser connection terminal.
Decoupling condenser connection terminal.
Reference resistance connection terminal.
Non connect.
Non connect.
Non connect.
Connected to GND of audio system through a condenser.
Inputs the audio signal through a condenser.
Power supply terminal.
Output selection control terminal.
Output selection control terminal.
Output selection control terminal.
Output selection control terminal.
Non connect.
Non connect.
Connected to GND upon normal use.
Multi-plexor output terminal.
Connect to GND.

1-39

MX-J570V/MX-J680V

BA3837(IC466):MIC Mixer

1.Block diagram

C

16

B

15

14

A

ROUT

13

LP
12

LP

11

LP
10

RIN

9

1

VCC

2.Pin function

Pin No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

LOGIC

+

-

2

MIC

Symbol

VCC

MIC IN

LOUT

FK
TK

LIN
BIAS
GND

RIN
LPF1
LPF2
LPF3

ROUT
CONTA
CONTB

CONTC

-

+

3

LOUT

-

SW2 SW1

4

FK

I/O

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

-

+

+

-

+

R

L-R

L+R

-

+

+

L

+

-

TK

5

6

LIN

7

BIAS

8

GND

Description

1-40

BU1427K (IC152) : Digital RGB-TV encoder

1. Terminal layout

MX-J570V/MX-J680V

2. Pin function

No. NAME FUNCTION

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

* The pin built-in pull-down resister. (30kohm)

BOSD
Y0/YUV0
Y1/YUV1
Y2/YUV2
Y3/YUV3
Y4/YUV4
Y5/YUV5
Y6/YUV6
GND
Y7/YUV7
UV0
UV1
UV2
UV3
OSDSW
CDGSWB
UV4
UV5
UV6
UV7
GND
NTB
IM0
IM1
TEST1
TEST2
VSY
HSY
PIXCLK
VDD
IO VDD
INT

OSD BLUE DATA INPUT
YUV DATA
YUV DATA
YUV DATA
YUV DATA
YUV DATA
YUV DATA
YUV DATA
DIGITAL GROUND
YUV DATA
U V DATA
U V DATA
U V DATA
U V DATA
OSD ENABLE/DISABLE
SELECT Video CD/CD-G
U V DATA
U V DATA
U V DATA
U V DATA
DIGITAL GROND
SELECT NISC/PAL MODE
SELECT YUV/YUV
SELECT DAC/NORMAL
Normally pull down to GND
SELECT U/V TIMING
V-SYNC INPUT or OUTPUT
H-SYNC INPUT or OUTPUT
1/2 freq. of BCLK
DIGITAL VDD
VDD for I/O
Interlace /Non-Interlace

No. NAME FUNCTION

33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

SLABEB
ADDH
VREF-C
CGND
COUT
VGND
VOUT
AVSS
P-VDD
IR
AVDD
YGND
YOUT
VDD
YFILON2B
YCOFF
YFILON1B
PAL60B
VCLK
RSTB
CLKSW
RD0
RD1
RD2
ROSD
RD3
BCLK/RD4
RD5
IO VDD
RD6
RD7
GOSD

SELECT MASTER/SLAVE
+0.5/-0.5 LINE at NON-INTER
DAC BIAS
CHROMA OUTPUT GROUND
CHROMA OUTPUT
Composite Output Ground
COMPOSITE OUTPUT
Analog Ground (DAC, VREF)
POWER(DAC) VDD
REFERENCE RESISTOR
ANALOG (VREF) VDD
Luminance Output Ground
Luminance Output
DIGITAL VDD
Y-FILSEL THROU/FILON2
DAC(YOUT,COUT) OFF
Y-FILSEL THROU/ FILON1
NORMAL/PAL60 at PALMODE
Video Clock Input
NORMAL/RESET
SEL*1CLK/*2CLK
Pull Down to GND
Pull Down to GND
Pull Down to GND
OSD RED DATA INPUT
Pull Down to GND
BASE CLOCK OUT
Pull Down to GND
VDD for I/O
Pull Down to GND
Pull Down to GND
OSDGREEN DATA INPUT

1-41

MX-J570V/MX-J680V

BU9253AS(IC902) : LPF&ECHO MIX.

1.Pin layout & block diagram

1

GND

BIAS

2

COUNTER

3

4

5

ECHO VR

DAINT IN

OSC

18

17

16

15

14

CR

MUTE

VCC

ADINT IN

DAINT OUT

DALPF IN

DALPF OUT

MIX OUT

2.Pin function
Pin No. Symbol

1
2

ECHO VR
3
4
5
6
7
8
9

DAINT IN

DAINT OUT

DALPF IN

DALPF OUT

MIX OUT
10
11
12
13
14

ADLPF IN

ADLPF OUT

ADINT OUT

ADINT IN
15
16
17
18

6

7

- +

8

9

GND

BIAS

MIX IN

VCC

NC2

MUTE

CR

D/A

MIX

SRAM

I/O

­I

-

­I

O

I
O
O

I

I
O
O

I

-

-

I

-

A/D

13

ADINT OUT

12

ADLPF OUT

- +
11

ADLPF IN

10

MIX IN

Descriptions

Connect GND
Echo level control
Non connect
Analog part DC bias
DA side integrator input
DA side integrator output
DA side LPF input
DAside LPF output
Mix AMP output for original tone& echo tone
Mix AMP input pin for original tone
AD side LPF input
AD side LPF output
AD side integrator output
AD side integrator input
Power supply
Non connect
Mute control signal input
CR pin for oscillator

1-42

MX-J570V/MX-J680V

HD74HCT244FP-XE (IC181) : Buffer

1. Terminal layout

2. Block diagram

1G

1A

1

2Y4

1A2
2Y3
1A3
2Y2

1A4

2Y1

VSS

VDD

2G

1Y1

2A4
1Y2

2A3
1Y3
2A2
1Y4

2A1

(Top View)

1
2
3

4
5
6

7
8

9

10

20
19
18

17
16

15
14
13

12

11

1A

1

2Y4

1A2

2Y3

1A3

2Y2

1A4

2Y1

2G

1Y1

2A4

1Y2

2A3

1Y3

2A2

1Y4

2A1

1G

1-43

MX-J570V/MX-J680V

KM416S1020CTG10 (IC104) : 16Mb SDRAM

1. T erminal layout

VCC
DQ0
DQ1

VSSO

DQ2
DQ3

VDDQ

DQ4
DQ5

VSSO

DQ6
DQ7

VCCQ

LDQM

WE
CAS
RAS

CS
BA

A10/AP

A0
A1
A2
A3

VDD

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

50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26

SS

V
DQ15
DQ14
VSSQ
DQ13
DQ12
VCCO
DQ11
DQ10
VSSQ
DQ9
DQ8
VCCQ
N.C/RFU
UDQM
CLK
CKE
N.C
A9
A8
A7
A6
A5
A4
VSS

2. Pin function

Pin name

CLK

CS

CKE

A0 A10/AP

BA
RAS
CAS

WE

L(U)DQM

DQ0 15

VDD/VSS

VDDQ/VSSQ

N.C/RFU

Function

System clock
Chip select
Clock enable
Address
Bank select address
Row address strobe
Column address Strobe
Write enable
Data input/Output mask
Data input/Output
Power supply/Ground
Data output power/Ground
No connection/Reserved for future use

1-44

2. Pin Function

Pin
No.

Symbol

I/O

Function

Function

I/O

Symbol

Pin
No.

1

2

3

4

5
6

7

8
9

10

11

12
13

14

15

FM IN

AM MIX

FM IF

AM IF

GND

TUNED

STEREO

VCC

FM DET

AM SD

FM VSM

AM VSM

MUTE

FM/AM

MONO/ST O

I

I/O

O

O

I

O

I

I

I

O

O

III

I

I

This is an input terminal of FM IF
signal.

This is an out put terminal for AM
mixer.

Bypass of FM IF

Input of AM IF Signal.

This is the device ground terminal.

When the set is tuning, this terminal
becomes "L".

Stereo indicator output. Stereo "L",
Mono: "H"

This is the power supply terminal.
FM detect transformer.
This is a terminal of AM ceramic filter.

Adjust FM SD sensitivity.

Adjust AM SD sensitivity.
When the signal of IF REQ of IC121(

LC72131) appear, the signal of FM/AM
IF output. //Muting control input.

Change over the FM/AM input.
"H" :FM, "L" : AM

Stereo : "H", Mono: "L"

16

17

18

19

20

21

22

23
24

25

26

27
28

29

30

OSC BUFFER

AM OSC

REG

AM RF

AFC

AM AGC

O

I

O

I

I

I

AM Local oscillation Signal output.

This is a terminal of AM Local
oscillation circuit.

Register value between pin 26 and pin28
desides the frequency width of the
input signal.

AM RF signal input.

This is an output terminal of voltage
for FM-AFC.

This is an AGC voltage input terminal
for AM

O

O

I

O

AM detection output.

FM detection output.

Mpx input terminal

O

O

I

Left channel signal output.

Right channel signal output.

Input terminal of the left channel post
AMP.

Input terminal of the right channel
post AMP.

I

O

Mpx Left channel signal output.

Mpx Right channel signal output.

L OUT

R OUT

L IN

R IN

RO

LO

IF IN

FM OUT
AM DET

1. Block Diagram

ALC

BUFF

AM

OSC

REG

AM

MIX

FM

RF.AMP

AGC

AM IF

DET

SD
COMP

AM
S-METER

FM
S-METER

FM IF

PM
DET

S-CLRVE

AM/FM
IF-BUFF

TUNING
DRIVE

GND

VCC

STEREO
DRIVE

MUTE

DECODER
ANIT-BIRDIE

STEREO
5N
SW

P-DET

PILOT
DET

FF
19k

FF
19k

FF
38k

VCO
384KHz

/

2

/LS

30

29

28

27

26

25

24

23

22

21

20

19

18

17 16

1

2

3

4

6

7

89

10

11

12 13

14

15

5

LA1838(IC1): FM AM IF AMP&detector, FM MPX decoder

MX-J570V/MX-J680V

1-45

MX-J570V/MX-J680V

LA6541-X(IC801) : Servo Driver

1. Pin Layout & Block Diagram

Vcc Vref Vin4 Vg4 Vo8 Vo7

24 23

22

21

20

19

11k

Vcc

Gnd

Vo6 Vo5 Vg3 Vin3 Cd Res

18

17 16

ohm

- +

- +

Level
shift

Level
shift

B T L
driver

B T L
driver

B T L
driver

B T L
driver

Level
shift

Level
shift

11k
ohm

1

Vcc Mute Vin1 Vg1 Vo1 Vo2 Vo3 Vo4 Vg2 Vin2 Reg

2

3456

Gnd

7 8 9101112

2. Pin functions

Pin

Symbol Function

No.

1

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

2
3
4
5
6
7
8
9

Vcc
Mute
Vin1

Vg1
Vo1
Vo2
Vo3
Vo4
Vg2

Vin2

Reg Out

Reg In

Res

Cd

Vin3

Vg3
Vo5
Vo6
Vo7
Vo8
Vg4

Vin4

Vref

Vcc

Power supply (Shorted to pin 24)
All BTL amplifier outputs ON/OFF
BTL AMP 1 input pin
BTL AMP 1 input pin (For gain adjustment)
BTL AMP 1 input pin (Non inverting side)
BTL AMP 1 input pin (Inverting side)
BTL AMP 2 input pin (Inverting side)
BTL AMP 2 input pin (Non inverting side)
BTL AMP 2 input pin (For gain adjustment)
BTL AMP 2 input pin
External transistor collector (PNP) connection. 5V power supply output
External transistor (PNP) base connection
Reset output
Reset output delay time setting (Capacitor connected externally)
BTL AMP 3 input pin
BTL AMP 3 input pin (For gain adjustment)
BTL AMP 3 output pin (Non inverting side)
BTL AMP 3 output pin (Inverting side)
BTL AMP 4 output pin (Inverting side)
BTL AMP 4 output pin (Non inverting side)
BTL AMP 4 output pin (For gain adjustment)
BTL AMP 4 output pin
Level shift circuit's reference voltage application
Power supply (Shorted to pin 1)

15

14

13

11k
ohm

RESET

Regulator

11k
ohm

Reg

out

In

1-46

LB1641 (IC853) : DC Motor Driver

1. Pin Layout

MX-J570V/MX-J680V

1 2 3 4 5 6 7 8 9

GNDOUT1 P1

VZ IN1 IN2

VCC1

VCC2 P2

2. Pin Functions

Input Output

IN1 IN2 OUT1 OUT2

0 0 0 0
1 0 1 0
0 1 0 1
1 1 0 0

NJM4580L (IC901) : Mic Amplifier

10

OUT2

Mode

Brake

CLOCKWISE

COUNTER-CLOCKWISE

Brake

1. A OUTPUT

2. A-INPUT

3. A+INPUT

-

4. V

1

2

34

5

TA8409S(IC851,IC852):Motor driver

1.Pin layout 2.Pin function

1

IN2

VCC

OUT 2

GND
GND

VS

OUT 1

VR

IN1

2
3
4
5
6
7
8
9

TA8409S

INPUT OUTPUT MODE

IN1

IN2

0

0

1

0

0

1

1

1

6

OUT1

H
L
L

7

OUT2

H

L

L

8

MOTOR

STOP
CW/CCW
CCW/CW

BRAKE

5. B+INPUT

6. B-INPUT

7. B OUTPUT

8. V+

1-47

MX-J570V/MX-J680V

NJM4580E-W(IC652) : OP amp

1. Terminal layout

A OUT

2. Block diagram

V

A IN

A IN

V

1

2

8

7

V

B OUT

A B

3

4

6

B IN

5

B IN

1-48

INPUT

OUTPUT

V

MN35511(IC651) : Digital servo & processor

1.Pin layout

28 1

MX-J570V/MX-J680V

21

40

2.Block diagram

DEMP/TEST2

LRCKI

BCKI

SDATAI

IOSEL

CRC

BLKCK

CLDCK

SBCK

SBCK2

SUBC

DEMPO

CLVS/FLAG6

SQCK
SUBQ

AVSS
AVDD

PCK/RESY

EFM

PLLF

DSFL

IREF

DRF

AFR
MLD

MCLK

MDATA

CK384

VCFO

SMCK/FCLK

XSEL

STAT

41 60

Digital deemphasis

Subcode

DSL PLL VCO

VCO

X2
X1

80

61

8tims
Over
Sampling

Digital
Filter

buffer

Timing generator

Pich control

VCOF2

PLL
VCO2

EFM DEMODULATION

SYNC INTERPOLATION

SUB CODE DEMODULATION

Micro computer
Interphace

A/D converter

DD
Method
DAC

16k
SRAM

CIRC error
Correction
Deinterleave

Servo cpu

Input port

PEM
R

PEM
L

Digital
Audio
Interface

CLV
Servo

Inter polation
Soft Muting
Digital
Attenuation
Peak detect
aaAuto cue

D/A
converter

Output port

Servo
Timing generator

AVDD2
OUT2D

OUT2C

OUT1D
OUT1C

AVSS2

FLAG

IP FLAG

TX

ECM
PC

LRCK
SRDATA

BCLK
DMUTE

VREF
TRV

KICK
PLAY/TRVSTP

ECS
TVD
TRD
FOD
TBAL
FBAL
/TLOCK
/FLOCK

LDON
TOFS

WVEL

SENSE

VSS

VDD

/RST

DVSS1

DVDD1

/TEST

FE

TE

RFENV

S

T

R
C
R

T

O

E

D

D

B

V

T
E
D
F

/R

T
F

O

1-49

MX-J570V/MX-J680V

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

symbol

BCLK
LRCK
SRDATA
DVDD1
DVSS1
TX

MCLK

MDATA
MLD
SENSE
FLOCK
TLOCK

BLKCK
SQCK
SUBQ
DMUTE

STATUS

RST

SMCK

PMCK

TRV
TVD
PC

ECM

ECS
KICK

TRD
FOD

VREF

FBAL
TBAL
FE
TE
RF ENV
VDET
OFT
TRCRS
RFDET
BDO
LDON

I/O
O

Bit clock output for SRDATA
Identification signal output of Lch and Rch

O

O

Serial data output

I

Power supply (Digital)

I

Connected to GND
Digital audio interface output

O

com command clock signal input

I

(Data is latched at signal's rising point)

com command data input

I
I

com command load signal input

Non connect

-

-

Non connect

-

Non connect

Non connect

­I

Outside clock for sub-code Q resister input

Sub-code Q -code output

O

I

Connected to GND

Status signal

O

(CRC,CUE,CLVS,TTSTOP,ECLV,SQOK)
Reset signal input (L:Reset)

I

I

Non connect

I

Non connect

O

Traverse enforced output

O

Traverse drive output

I

Non connect

Spindle motor drive signal (Enforced

O

mode output) 3-State
Spindle motor drive signal (Servo error

O

signal output)

Kick pulse output

O

Tracking drive output

O
O

Focus drive output
Reference voltage input pin for D/A

I

output block (TVD,FOD,FBA,TBAL)
Focus Balance adjust signal output

O

O

Tracking Balance adjust signal output

Focus error signal input(Analog input)

I

Tracking error signal input(Analog input)

I
I

RF envelope signal input(Analog input)

Vibration detect signal input(H:detect)

I

Off track signal input(H:off track)

I

Track cross signal input

I

RF detect signal input(L:detect)

I

BDO input pin(L:detect)

I

Laser ON signal output(H:on)

O

Description

Pin
No.

41
42
43

44
45
46

47

48

49
50
51

52

53

54

55

56

57

58

59

60

61

62

63
64

65
66

67

68

69

70
71
72

73

74

75
76

77

78
79

80

symbol

TES
PLAY

WVEL
ARF
IREF
DRF

DSLF

PLLF
VCOF
AVDD2

AVSS2
EFM

PCK
PDO

SUBC
XSEL

VSS

XI
X2

VDD

VCOF2
AVSS1

OUT1C

OUT1D

OUT2D
OUT2C

AVDD1

DEMPO

CK384

IOSEL

TEST

SBCK2

SUBC

SBCK

CLDCK
IPFLAG
DEMPI

SDATI

LRCKI

BCKI

I/O

Non connect

II

Non connect

I

Non connect

I

RF signal input
Reference current input pin

I

Bias pin for DSL

I

I/O

Loop filter pin for DSL
Loop filter pin for PLL

I/O

I

Not used

I

Power supply(Analog)

Connected to GND(Analog)

Non connect

III

Non connect

I

Non connect

I

Non connect

Clock input for subcode/serial output

I

Connected to GND(for X'tal oscillation

I

circuit)

Input of 16.9344MHz X'tal oscillation circuit

I

Output of X'tal oscillation circuit

O

I

Power supply(for X'tal cscillation circuit)
PLL loop filter terminal for jitter absorption

O
O

Ground terminal for audio DAC

O

PEM output terminal 1C

PEM output terminal 1D

O

O

PEM output terminal 2D

PEM output terminal 2C

O

Power supply for audio DAC

O

Non connect

­384fs clock output

O

I

Mode switch terminal

I

Test mode setting terminal

I

Sub code/data reading clock input

O

Sub code/serial output
Clock input for sub code/serial output

I

O

Sub code /frame clock signal output terminal
Interpolation flag signal output H:Interpolation

I

IOSEL:L The outside DEMPO input terminal

I

SRDATA input terminal

I

When IOSEL is "L", LRCK input H:Lch data

I

L:Rch data
When IOSEL is "L", BCK input

I

Description

1-50

TC74VHC00FT-X(IC106) : Wright timing control

1.Terminal layout / Block diagram
Vcc 4B 4A 4Y 3B 3A 3Y

14 13

12

11 10 9 8

MX-J570V/MX-J680V

2

1

6

543

1A 1B 1Y 2A 2B 2Y GND

TC74VHC74FT-X (IC107) : Flip-Flop

1CLR 1
1D 2
1CK 3
1PR 4
1Q 5
1Q 6
GND

CKQD

Q

CKQD

Q

(TOP VIEW)

14
13
12
11
10
9
8

V

CC

2CLR
2D
2CK
2PR
2Q
2Q7

7

1-51

MX-J570V/MX-J680V

TDA7439 (IC436) : Conrtol volume

1.Pin layout

1

SDA

2

CRE

3

Vs

4

AGND

5

ROUT

6

LOUT

7

R-IN4

8

R-IN3

9

R-IN2

10

R-IN1

11

L-IN1

12

L-IN2

13

L-IN3

14

L-IN4

MUXOUTL

2.Block diagram

15

TDA7439

30

CSL

29

DIG GND

28

TREBLE(R)

27

TREBLE(L)

26

MIN(L)

25

MOUT(L)

24

BOUT(L)

23

BIN(L)

22

BOUT(R)

21

BIN(R)

20

MOUT(R)

19

MIN(R)

18

INR

17

MUXOUTR

16

INL

L-IN1

L-IN2
L-IN3

L-IN4
R-IN1
R-IN2
R-IN3
R-IN4

11

12

13

14

10

MIN(L)

26

MIDLE

25

MOT(L)

23

G

0/30dB
2dB STEP

INL

MUXOUT

15 16 27

VOLUME

2

I C BUS DECODER LATCHES

TREBLE

TREBLE(L)

9

G

VOLUME

TREBLE

MIDLE

8
7

INPUT
MULTIPLEXER
GAIN

17

18

201928

BIN(L)

24

BASS

BASS

2221

BOUT(L)

SPEAKER
ATT
LEFT

SPEAKER
ATT
RIGHT

SUPPLY

2

4

30

1

29

5

3

4

AGND

SCL
SDA

DIG-GND

ROUT

Vs

AGND

INR

CREF

MUXOUT

MIN(R)

TREBLE(R)

BIN(R)

MOUT(R)

BOUT(R)

1-52

BU1427K (IC701) : Digital RGB-TV Encoder

1. Terminal layout

MX-J570V/MX-J680V

2. Pin function

No. NAME FUNCTION

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

* The pin built-in pull-down resister. (30kohm)

BOSD
Y0/YUV0
Y1/YUV1
Y2/YUV2
Y3/YUV3
Y4/YUV4
Y5/YUV5
Y6/YUV6
GND
Y7/YUV7
UV0
UV1
UV2
UV3
OSDSW
CDGSWB
UV4
UV5
UV6
UV7
GND
NTB
IM0
IM1
TEST1
TEST2
VSY
HSY
PIXCLK
VDD
IO VDD
INT

OSD BLUE DATA INPUT
YUV DATA
YUV DATA
YUV DATA
YUV DATA
YUV DATA
YUV DATA
YUV DATA
DIGITAL GROUND
YUV DATA
U V DATA
U V DATA
U V DATA
U V DATA
OSD ENABLE/DISABLE
SELECT Video CD/CD-G
U V DATA
U V DATA
U V DATA
U V DATA
DIGITAL GROND
SELECT NISC/PAL MODE
SELECT YUV/YUV
SELECT DAC/NORMAL
Normally pull down to GND
SELECT U/V TIMING
V-SYNC INPUT or OUTPUT
H-SYNC INPUT or OUTPUT
1/2 freq. of BCLK
DIGITAL VDD
VDD for I/O
Interlace /Non-Interlace

No. NAME FUNCTION

33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

SLABEB
ADDH
VREF-C
CGND
COUT
VGND
VOUT
AVSS
P-VDD
IR
AVDD
YGND
YOUT
VDD
YFILON2B
YCOFF
YFILON1B
PAL60B
VCLK
RSTB
CLKSW
RD0
RD1
RD2
ROSD
RD3
BCLK/RD4
RD5
IO VDD
RD6
RD7
GOSD

SELECT MASTER/SLAVE
+0.5/-0.5 LINE at NON-INTER
DAC BIAS
CHROMA OUTPUT GROUND
CHROMA OUTPUT
Composite Output Ground
COMPOSITE OUTPUT
Analog Ground (DAC, VREF)
POWER(DAC) VDD
REFERENCE RESISTOR
ANALOG (VREF) VDD
Luminance Output Ground
Luminance Output
DIGITAL VDD
Y-FILSEL THROU/FILON2
DAC(YOUT,COUT) OFF
Y-FILSEL THROU/ FILON1
NORMAL/PAL60 at PALMODE
Video Clock Input
NORMAL/RESET
SEL*1CLK/*2CLK
Pull Down to GND
Pull Down to GND
Pull Down to GND
OSD RED DATA INPUT
Pull Down to GND
BASE CLOCK OUT
Pull Down to GND
VDD for I/O
Pull Down to GND
Pull Down to GND
OSDGREEN DATA INPUT

1-53

MX-J570V/MX-J680V

BU4094BCF (IC303,IC304) : Serial to parallel port extension

1.Pin layout

STTA

SDATA

SCK
BIAS1
BIAS2
BIAS3
RECB

DG

2.Block diagram

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10

9

VDD
CE
RECH
SOL-RP
MOTOR
RMUTE
QS'
QS

DATA

CLOCK

STROBE

OUTPUT

ENABLE

15

2

8-STAGE

3

1

SHIFT REGISTER

8-BIT

10

9

Q's
Qs

SERIAL
OUTPUT

LATHES

3-STATE

OUTPUTS

Q1

Q8

PARALLEL OUTPUT

1-54

CL8830-PA1 (IC101) : MPEG Decoder & DSP

1. Pin layout

208 157

MX-J570V/MX-J680V

1

52

53 104

2. Block diagram

156

105

1-55

MX-J570V/MX-J680V

3.Pin function(1/2)

Pin No

13

178

190,174,156,153,147,141,138,

133,129,52,1

176

179

5,12,17,27,36,40,47,55,61,65,

69,75,81,87,91,95,101,107,113,

117,123,134,144,149,160,168,

175,181,193,197

7,14,19,29,38,42,49,57,63,67,

71,77,83,89,93,97,103,109,115,

119,125,136,146,151,162,170,

183,195,199

206

204-202

11-8,6,4-2

16

208
207

15

185

184
182

180

Name

RESET

SYSCLK

PIO[10:0]

A- VDD

A- VSS
VDD

VSS

CS

HADDR[2:0]

HDAT[7:0]

INT

RD
R/W

WAIT

CD-C2PO

CD-BCK
CD-LRCK

CD-DATA

Symbol and I/O

System Services

I

I

I/O

Power and Ground

Analog

Power

Analog Ground

Power

Ground

8-bit Host Interface

I

I

I/O

O,OD,PU

I
I

O,OD,PU

CD interface

I

I
I

I

Description

Hardware reset. An external device asserts RESET (active LOW)
to execute a decoder hardware reset. To ensure proper initializat­ion after power is stable, assert RESET for at least 20 s.
System clock. Decoder requires an external 27 MHz TTL oscillator.
Drive with the same 27-MHz as VCK.
Programmable I/O pins.

3.3-V analog supply voltage.

Analog ground for PLL.

3.3-V supply voltage for core logic and I/O signals.

Ground for core logic and I/O signals.

Host chip select. Host asserts CS to select the decoder for a read
or write operation. The falling edge of this signal triggers the read or
write operation.
Host address bus. 3-bit address bus selects one of eight host interf­ace registers.
8-bit bi-directional host data bus. Host writes data to the decoder
Code FIFO via HDATA[7:0]. MSB of the 32-bit word is written
first. The host also reads and writes the decoder internal registers
and local SDRAM/ROM via HDAT[7:0].
Host interrupt. Open drain signal, must be pulled-up to 3.3 volts.
Driven high for 10 ns before tristate.
Read strobe in I mode. Must be held HIGH in M Mode.
Read/write strobe in M mode. Write strobe in I mode. Host asserts
R/W LOW to select write and LOW to select Read.
Active LOW to indicate host initiated transfer is not complete.
WAIT is asserted after the falling edge of CS and reasserted when
decoder is ready to complete transfer cycle. Open drain signal, mu­st be pulled-up to 3.3 volts. Driven high for 10 ns before tristate.

Asserted HIGH indicates a corrupted byte. Decoder keeps the pre­viouse valid picture on-screen until the next valid picture is decoded.
CD bit clock. Decoder accept multiple BCK rates.
Programmable polarity 16-bit word synchronization to the decoder
(right channel HIGH).
Serial CD data.

1-56

Pin No

Symbol and I/O

Description

Video Output

157

177

155,154,152,150,148,145,143,

142

158

I/O

I

O

I/O

Horizontal sync. The decoder begins outputting pixel data for a new
horizontal line after the falling (active) edge of HSYNC.
Video clock. Clocks out data on input. VDATA[7:0]. Clock is ty­pically 27 MHz.
Video data bus. Byte serial CbYCrY data synchronous with VCLK.
At power-up, the decoder does not drive VDATA. During boot-up,
the decoder uses configuration parameters to drive or 3-state
VDATA.
Vertical sync. Bi-directional, the decoder outputs the top border of
a new field on the first HSYNC after the falling edge of VSYNC.
VSYNC can accept vertical synchronization or top/bottom field no­tification from an external source. (VSYNC HIGH = bottom field.
VSYNC LOW = Top field)

SDRAM/EDO/ROM interface

92
94
79

127,126,124,122-120,118,116,
114,112-110,108,106-104,102,

100-98,96

78,76,74-72,70,68,66,64,62,60-

58,56,54,53

82

128

85
84

88,90

86
80

O
O
O
O

I/O

O

O,OD,PU

O
O
O
O
O

Active LOW EDO DRAM column address strobe.
Active LOW EDO DRAM Row address strobe.
SDRAM LDQM.
Memory address.

Memory data.

SDRAM/EDO write enable. Decoder asserts active LOW to request
a write operation to the SDRAM array.
ROM chip select. Open drain signal, must be pulled-up to 3.3 volts.
Active LOW SDRAM column address.
SDRAM system clock.
Active LOW SDRAM bank select.
Active LOW SDRAM row address.
SDRAM UDQM.

Audio interface

167

161
166

169

173
171

172

O

O
O

I/O

I
I

I

PCM bit clock. Divided by 8 from DA-XCK, DA-BCK can be either
48 or 32 times the sampling clock.
Serial audio samples relative to DA-BCK clock.
PCM left-right clock. Identifies the channel for each audio sample.
The polarity is programmable.
Audio external frequency clock. Used to generate DA-BCK and DA­LRCK. DA-XCK can be either 384 or 256 times the sampling frequ­ency.
PCM input bit clock.
PCM input data, two channels. Serial audio samples relative to DA­BCK clock, resulting in downmixed audio output.
PCM input left-right clock.

1.I-input, O-output, OD-open drain, PU-requires external 4.7-k pull-up resistor.

Name

HSYNC

VCLK

VDATA[7:0]

VSYNC

EDO-CAS
EDO-RAS
LDQM
MADDR[20:0]

MDATA[15:0]

MWE

ROM-CS
SD-CAS
SD-CLK
SD-CS[1:0]
SD-RAS
UDQM

DA-BCK

DA-DATA
DA-LRCK

DA-XCK

DAI-BCK
DAI-DATA

DAI-LRCK

3.Pin function(2/2)

MX-J570V/MX-J680V

1-57

MX-J570V/MX-J680V

LC72136N (IC2) : PLL frequency synthesizer

1. Pin layout

FM/AM

CLOCK

FM/ST/VCO

AM/FM

2. Block diagram

XT

CE

DI

DO

SDIN

1
2
3
4
5
6
7
8
9
10
11

22
21
20
19
18
17
16
15
14
13
12

XT
GND
LPFOUT
LPFIN
PD
VCC
FMIN
AMIN

IFCONT
IFIN

1

22

16

15

3

4
5

6

17

21

3. Pin function

Pin

Symbol

No.
1
2
3

4

5
6

7

8
9
10
11

XT

FM/AM

CE

DI

CLOCK

DO

FM/ST/VCO

AM/FM

LW

MW

SDIN

Reference

Driver

Swallow Counter

1/2

C

2B

I/F

Power

on

Reset

Function

I/O

X'tal oscillator connect (75kHz)

I

LOW:FM mode

O

When data output/input for 4pin(input) and

I

Swallow Counter

1/16,1/17 4bit

1/16,1/17 4bit

12bit

Programmable

DriverS

Data Shift Register & Latch

782

6pin(output): H
Input for receive the serial data from

I

controller
Sync signal input use

I

Data output for Controller

O

Output port
"Low": MW mode

O

Open state after the power on reset

O

Input/output port

I/O

Input/output port

I/O

Data input/output

I/O

Phase

Detector

Charge Pump

Unlock

Detector

Universal

Counter

11

13

Pin

Symbol

No.

IFIN

12

IFCONT

13
14

AMIN

15

FMIN

16

VCC

17

18

19
20

12

I/O

Function
IF counter signal input

I

IF signal output

O

Not use

-

AM Local OSC signal output

I

FM Local OSC signal input

I

Power suplly(VDD=4.5-5.5V)

­When power ON:Reset circuit move
PLL charge pump output(H: Local OSC

18

PD

O

frequency Height than Reference frequency.
L: Low Agreement: Height impedance)
Input for active lowpassfilter of PLL

19
20
21
22

LPFIN

LPFOUT

GND

XT

I

Output for active lowpassfilter of PLL

O

Connected to GND

­X'tal oscillator(75KHz)

I

1-58

LHMN4RN5-X (IC105) : 4MB micro code

MX-J570V/MX-J680V

1.Terminal layout

1
2

A16

3

A15

4

A12

5

A7

6

A6

7

A5

8

A4

9

A3

10

A2

11

A1

12

A0

13

D0

14

D1

15

D2

16

VSS

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

VDD
A18
A17
A14
A13
A8
A9
A11
OE
A10
CE
D7
D6
D5
D4
D3

2.Block diagram

31

A18

30

A17

2

A16

3

A15

29

A14

28

A13

4

A12

25

A11

23

A10

26

A9

27

A8

5

A7

6

A6

7

A5

8

A4

9

A3

10

A2

11

A1

12

A0

CE

22

CE

buffer

Address buffer

Address decoder

Timing

generator

Memory matrix

(524,288 8bit)

Column selector

Sense amplifier

3.Pin function
Pin No.

1

2,3

4

5~12

13~15

16

17~21

22
23
24

25
26,27
28,29
30,31

32

Symbol

A16,A15

A12
A7~0
D0~2

VSS

D3~7

CE

A10

OE

A11

A9,8
A13,14
A17,18

VDD

DC

1

OE

24

I/O Description

Non connect

­Address input

I

Address input

I

Address input

I

Data output

O

Connect to GND

­Data output

O

Chip enable input

I

Address input

I

Output enable input

I

Address input

I

Address input

I

Address input

I

Address input

I

Power supply

-

OE

buffer

Output buffer

32 16 13 14 15 17 18 19 20 21

GND

VCC

D0 D1 D2 D3 D4 D5 D6 D7

1-59

MX-J570V/MX-J680V

UPD6461GS-635-X (IC151) : 16MB SDRAM

1.Pin layout

CS

CKOUT

OSCOUT

OSCIN

1
2
3
4
5
6
7
8
9

10

CLK

CS

DATA

PCL

VDD

TEST

VSS

BLK1

CLK

DATA

PCL

VDD

CKOUT

OSCOUT

OSCIN

TEST

VSS

2.Pin function

Pin No. Symbol Description Pin No. Symbol Description

1
2
3
4
5
6
7
8

9
10
11

20

HSYNC

19

VSYNC

18

VB

17

VG

16

VR

15

VBLK

14

VC2

13

BLK2

12

VC1

11

BLK1

Clock signal input
Chip select input
Serial data input
Power ON clear
Power supply
Non connect
Non connect
Oscillation terminal (output)
Connect to GND
Connect to GND
Non connect

12
13
14
15
16
17
18
19

20

VC1

BLK2

VC2

VBLK

VR
VG
VB

VSYNC

HSYNC

Non connect
Non connect
Non connect
Blanking signal output
Character signal output
Character signal output
Character signal output
Vertical synchronizing
signal input
Horizontal synchronizing
signal input

1-60

MN101C35DEB (IC810) : System controller

Pin function (1/2)

MX-J570V/MX-J680V

Pin No.

1
2
3
4
5
6
7
8

9,10

11

12,13

14
15

16~19

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
49
50

Symbol

KCMND

MSTAT

KCLK

DATAOUT

DATAIN

CK

BEAT

VDD

OSC2,1

VSS

XI,XO
MMOD
VREF-

KEY1~4
SLCKEY1
SLCKEY2
SLCKEY3

SPID

VREF+

MRDY

RESET

P OPEN
P CLOSE

VOLLED

MSI
ECHO2
ECHO1
REMIN

PHOTOA
PHOTOB

INH

RDSCLK

PRT

EXTCE

BASSVOL+/-

RDS-DATA

SPIA
SPIB

VOL+/-

MPX
FVOLDA
VOLCLK

BASSLED

I/O

O

O

O
O

I/O

I/O

O

O
O
O

Function

SVC3 Serial data output
I
I

I

-

-

-

­I
I
I
I
I
I
I
I
I
I

I

-

­I
I
I
I
I
I

­I
I

-

­I
I

SVC3 status input input

SVC3 Serial clock input

SLC/TUNER data output

TUNER data input

SLC/TUNER clock

Beat cut signal output of TUNER

Power supply +5V

Oscillation terminal (8MHz)

Connect to GND

Sub clock (32.768kHz)

Connect to GND

Connect to GND

Key matrix input 1~4

Tape B playback/recording detect switch

Tape B playback detect switch

Tape A playback detect switch

SPID IN

AD port voltage reference

VC3 Ready

Reset signal input

Rolling panel open detection signal input

Rolling panel close detection signal input

LED Control signal output (VOL)

MS detector signal input

Echo ON/OFF(Not used)

Echo ON/OFF(Not used)

Remote control signal input

Tape A mechanism running detection signal input

Tape B mechanism running detection signal input

Inhibit signal input

Clock signal input from IC3 (B/E/EN model)

Protector input

EXT IC Chip enable

Bass volume rotary encoder input(+/-)

RDS data input from IC3(B/E/EN model)

SPI Control A

SPI Control B

Volume rotary encoder input (+/-)

Stereo detect

Front volume data output

Clock sibnal output to IC436
LED Control signal output (BASS)

1-61

MX-J570V/MX-J680V

Pin function (2/2)

Pin No.

51~63
64~87

88
89
90
91
92
93
94
95
96
97
98
99

100

Symbol

G13~G1

P1~P24

SLCCE
AUX LED
DOORCL

DOOR OPEN

CDLED

TAPE LED

TU LED
SMUTE

BTU+

POUT

TUCE

VC3RESET

VPP

I/O

O
O
O
O
O
O
O
O
O
O
O
O
O
O

Function

FL grid control signal output
FL segment control signal output
SLC Chip enable signal output to IC303,IC304
LED Control signal output (AUX)
Rolling panel motor control signal output
Rolling panel motor control signal output
LED Control signal output (CD)
LED Control signal output (TAPE)
LED Control signal output (TUNER)
System mute control signal output
Tuner supply control
Power ON/OFF
TUNER Chip enable signal output
VC3 reset output

-

Power supply

1-62

1

2
3
4
5

6
7
8

9
10
11
12

13~16

17
18
19
20
21
22
23
24
25

26~33

34

35~41

42
43

44~47
48~53

54

55~57

58
59
60
61
62
63
64

65
66
67
68

69

70
71
72
73
74
75
76

77
78

79,80

81
82
83

84~91

92

93~100

DVDWAIT

OE

WE

ROMCS

RAMCS

DVDCS

BREQ

DVDRST

WORD
HA0~3

VDD

SYSCLK

VSS

XI

XO

VDD

OSCI
OSCO
MODE

HA4~11

VDD

HA12~18

HA19

VSS

HA20~23

VDD

ENCRST

PAL60
N/PAL

VSS

VCDEMP

HREQ

HRDY

VDD

SRCLK

M2HDAT

H2MDAT

SBT1

SBI1

SBO1

MREQ

DVDINT

ADSEP
RESET

VDD

VSS

HD0~7

Wait signal input from
IC106
Read Enable input
Non connect
Write enable signal output
Chip select signal output
(ROM)
Non connect
Non connect
Chip select signal output
(AV decoder)
Power supply
Reset signal output to IC101
Non connect
Connect to ground
Host address bus terminal
Power supply
Non connect
Connect to ground
Connect to ground
Non connect
Power supply
Oscillation terminal(1MHz)
Oscillation terminal(1MHz)
Connect to ground
Host address bus terminal
Power supply
Host address bus terminal
Non connect
Connect to ground
Non connect
Non connect
Power supply

Non connect
Reset signal output to IC152
Normal PAL60 at PAL mode
Select NTSC/PAL mode
Connect to ground
Non connect
Non connect
Request signal output to
IC251
Ready signal output to IC251
Power supply
Data clock input
Mecha to host micom
data port
Host to mecha micom
data port
Power supply
Connect to ground
Non connect
Pull up
Pull up
Power supply
Request signal input
from IC251
Non connect

Interrupt from AV decoder

Non connect
Power supply
Reset signal input
Power supply
Non connect
Connect to ground
Host data bus terminal

I

I

­O
O

-

­O

­O

-

­O

-

-

-

-

-

-

I

O

­O

­O

-

-

-

-

-

­O
O
O

-

-

­O

O

-

I
I

O

-

-

-

-

-

-

I

-

I

-

-

I

-

-

-

I/O

Pin No. Symbol I/O Description Pin No. Symbol I/O Description

MN102L490A (IC103) : VCD Host micom

1

25

75

51

26 ~ 50

100 ~ 76

~

~

1.Pin layout

2.Pin function

MX-J570V/MX-J680V

1-63

MX-J570V/MX-J680V

-MEMO-

1-64

MX-J570V
MX-J680V

VICTOR COMPANY OF JAPAN, LIMITED

AUDIO & COMMUNICATION BUSINESS DIVISION
PERSONAL & MOBILE NETWORK BSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.20889)

Printed in Japan
200012(V)