JVC SP-MXJ270V, CA-MXJ270V Service Manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MX-J270V

RM-SMXJ111V REMOTE CONTROL

CLOCK

TIMER

1

2 3

–+

SELECT

4 5 6

ECHO SET

7 8 9

10+10

PREV NEXT RETURN SELECT

A – TAPE - B

REC PAUSE

SHIFT FM MODE

SOUND

VOLUME

MODE

MX-J270V

US
UX

STANDBY

PLAY & EXCHANGER

VIDEO CD

1 BIT

DUAL D/A CONVERTER

PHONES

TAPE

MIC LEVEL

AUX

MIN

MAX

ON SCREEN

SLEEP

V.INTRO

HIGHLIGHT

PLAY MODE

CD3CD2CD1

STILL

C D

TAPE

AUX

FM/AM

i

KEY
CONTROL

I

MIC

SP-MXJ270V

NTSC/PAL COMPATIBILITY

MX-J270V

KEY CONTROL

MPX/V.REPLACE/V.MASKING

REC

START/STOP

– PRESET +

NEXT

EJECT EJECT

TUNING / VCD NUMBER

–

SOUND MODE ACTIVE BASS EX.

AUTO REVERSE

DUBBING

CD REC START

PLAY

PREV

REVERSE MODE TAPE A/B

AUTO REVERSE

CA-MXJ270V

ECHO

+

CD

CD

CD

REC/PLAY

NTSC/PAL PAL AUTO

CD

CD

CD

VOLUME

+

–

RANDOM

CD

SELECT

REPEAT

FM /AM

SP-MXJ270V

Area Suffix

Singapore

Saudi Arabia

Contents

Safety Precautions
Important for laser products
Preventing static electricity
Disassembly method
Adjustment method

COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD.

1-2
1-3
1-4
1-5
1-22

PlayBack

Control

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

VIDEO CD

1-26
1-27
1-27
1-28

No.20880

Nov. 2000

MX-J270V

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.

CAUTION

!

1-2

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.

Important for laser products

MX-J270V

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.

4.CAUTION : The compact disc player uses invisible
laserradiation and is equipped with safety switches
whichprevent emission of radiation when the drawer is
open and the safety interlocks have failed or are de
feated. It is dangerous to defeat the safety switches.

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

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)

CLASS 1
LASER PRODUCT

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-J270V

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

1-4

MX-J270V

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

Remove the two screws B on both sides of the body.
Remove the metal cover from the body while lifting

up the rear part of the metal cover.

1.

2.

3.

<Main body>

Removing the metal cover

(See Fig.1 to 3)

Disassembly method

Fig.3

Fig.2

Fig.1

Metal cover

A

A

A

Metal cover

B

Metal cover

B

1-5

MX-J270V

Removing the CD changer mechanism
assembly (See Fig.4 to 7)

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

1.

Disconnect the card wire from connector CN308 and
CN309 connecting the CD servo board and the main
board.

2.

Disconnect the harness from CN310 on the main
board.

3.

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

4.

Remove the plastic rivet a fixing the main board to
the front panel assembly on the left side of the body.

5.

Remove the two screws D from the rear panel.

6.

Cut off the band b and band c which bundle two
harnesses coming from the MIC/headphone board
and one harness coming from the video board,
respectively.

CD changer
mechanism
assembly

Plastic rivet a

Front panel

assembly

Main board

CN303

C

Fig.4

CD changer mechanism assembly

CN310

CN308

Rear panel

7.

Detach upward the rear part of the CD changer
mechanism assembly while pulling the front panel
assembly and the rear panel outward, then pull out
the front part backward and upward.

Rear panel

CN309

Main board

Fig.5

D

Rear panel

Fig.6

CD changer mechanism

assembly

Front panel
assembly

1-6

Pull outward

Band b

Band c

Fig.7

Pull outward

Main board

MX-J270V

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

Disconnect the card wires from connector CN302,
CN306, CN307 and the harness from CN301,
CN305 on the inside of the main board.

Turn over the body and remove the four screws E.
Release the joint d and e on both sides of the body

using a screwdriver, and detach the front panel
assembly toward the front.

1.

2.

3.

Removing the front panel assembly

(See Fig.8 to 11)

Fig.9

Fig.8

Fig.10

Fig.11

Main board

CN301

CN302

CN306

CN307

CN312

CN305

E

Front panel
assembly

Front panel
assembly

Joint d

Front panel
assembly

Joint e

(Bottom)

1-7

MX-J270V

Removing the rear cover, the rear panel,
the voltage selector and the video board
(See Fig.12 to 15)

Prior to performing the following procedures, remove
the metal cover and the CD changer mechanism
assembly.
It is not necessary to remove the front panel
assembly.

1.

Remove the two screws F and the rear cover on the
back of the body.

2.

Remove the four screws G and the seven screws H
attaching the main board and the heat sink to the
rear panel.

3.

Remove the screw I attaching the rear panel to the
chassis base.

4.

Remove the two screws J attaching the rear panel to
the voltage selector.

5.

Remove the two screws K attaching the rear panel to
the video board.

F

Rear cover

H

G

(To Earth bracket)

H

Rear panel

F

Fig.12

Rear panel

J

K

6.

Release the lower two joints f and g on both sides of
the rear panel using a screwdriver and detach the
rear panel backwards.

Rear panel

G

I

Fig.13

Joint f

Fig.14

1-8

Rear panel

Joint g

Fig.15

MX-J270V

Prior to performing the following procedures, remove
the metal cover, the CD changer mechanism
assembly, the rear cover, the rear panel, the voltage
selector and the video board.
It is not necessary to remove the front panel
assembly.

Disconnect the card wires from connector CN302,
CN306, CN307 and the harnesses from CN301,
CN305, CN901A and CN901B on the inside of the
main board.

Disconnect the harness from CN312 on the video
board.

From the right side of the body, remove the screw M
attaching the main board to the chassis base.

1.

2.

3.

Removing the main board

(See Fig.16 to 19)

Prior to performing the following procedure, remove
the rear cover, rear panel, voltage selector and the
video board.

Remove the two screws N attaching the heat sink to
the main board. Remove the IC bracket 1 and 2 on
the back of the heat sink.

Pull out the heat sink toward you.

1.

2.

~To remove the heat sink from

the main board~

Prior to performing the following procedures, remove
the main board.

Release the two joints h and i using a screwdriver
and detach the DSP board toward you.

1.

Removing the DSP board

(See Fig.19)

Fig.16

Fig.17

M

Main board

Main board

CN306

CN307

CN302

CN305

CN301

CN901A,CN901B

Fig.18

Heat sink

N

Main board

Fig.19

Heat sink

IC bracket 2

IC bracket 1

CN312

DSP board

DSP board

Joint i

Joint h

DSP board

Video board

1-9

MX-J270V

Removing the power transformer
assembly
(See Fig.20 to 22)

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

1.

Disconnect the harness from connector CN901A and
CN901B on the inside of the main board.

2.

Cut off the tie band j of the power transformer
assembly and unsolder the power cord.
(Make sure to bundle the wires after repair.)

3.

Remove the four screws O attaching the power
transformer assembly.

When removing the power transformer assembly
with the power cord, remove the rear panel and pull
out the power cord stopper from the bottom chassis
upward.

CN901A,CN901B

Video board

Voltage selector board

Power transformer assembly

Fig.20

O

Voltage selector board

Front panel

assembly

Voltage selector board

Video board

Tie band j

Rear panel

Power cord stopper

O

Power transformer

Fig.21

Power transformer

assembly

Fig.22

assembly

1-10

MX-J270V

<Front panel assembly>

Removing the MIC/headphone board
(See Fig.23 and 24)

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

1.

Remove the two screws P attaching the MIC
/headphone board.

2.

Pull out the MIC LEVEL knob from front side.

Removing the cassette mechanism
assembly
(See Fig.25)

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

1.

Disconnect the card wire from connector CN305 on
the cassette amplifier board.

2.

Remove the eight screws Q attaching the cassette
mechanism assembly.

3.

Detach the cassette mechanism assembly toward
you.

Removing the cassette amplifier board

(See Fig.26)

Fig.23

Cassette
mechanism
assembly

Q

MIC/headphone board

Front panel assembly

P

MIC LEVEL knob

Fig.24

Front panel assembly

CN305

Q

Q

Prior to performing the following procedure, remove
the cassette mechanism assembly.

1.

Disconnect the card wire from connector CN301 and
CN302 on the cassette amplifier board.

2.

Remove the six screws R attaching the cassette
amplifier board.

3.

Unsolder the soldering k on the harness for the DC
motor.

4.

Detach the cassette amplifier board toward you.

Q

Cassette amplifier board

DC motor

R

Soldering k

CN302

R

Q

R

Q

Fig.25

Fig.26

Cassette amplifier
board

Cassette mechanism

board

R

CN301

R

R

1-11

MX-J270V

Removing the display board and the
bracket (See Fig.27 and 28)

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

Disconnect the card wire from connector CN306 on

1.
the cassette amplifier board.

Remove the four screws S attaching the front panel

2.
assembly.

Remove the four screws T attaching the front panel

3.
assembly.

Unsolder FW701, FW702, FW703, FW704 and

4.
FW705 on the display board. Disconnect the
harnesses extending from the power switch board,
the eject switch board, the volume board and the
multi-control board respectively

Removing each board in the front panel
assembly (See Fig.29 to 31)

Prior to performing the following procedure, remove
the display board.

~Removing the multi-control board~
(See Fig.29)

1.

Remove the eight screws U attaching the multi­control board.

~Removing the volume board~
(See Fig.30 and 31)

1.

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

2.

Unhook the two hooks l on the back of the front
panel assembly and detach the volume board.

~Removing the eject switch board ~
(See Fig.29)

Remove the four screws V attaching the eject switch

1.

board.

~Removing the power switch board~
(See Fig.29)

Remove the three screws W attaching the power

1.

switch board.

Front panel

assembly

Bracket

Display board

FW703

FW701

T

Display board

Eject

switch

board

Volume

board

U

U

V

T

S

Fig.27

Fig.28

U

Front panel assembly

Front panel assembly

FW702

T

FW704
FW705

W

Power

switch

board

Multi-

control

board

U

U

Volume

knob

Volume

Fig.30

1-12

board

Fig.31

Hooks l

Front panel assembly

U

Fig.29

CD Traverse Mechanism Type:C3CN Section

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

1.

Remove the Metal cover.

2.

Remove the CD Traverse mechanism assembly.

3.

From bottom side the CD Traverse mechanism
assembly, remove the one screw A retaining the CD
Servo control board.
From the connectors CN601, CN603, CN604 on the CD

4.
Servo control board, disconnect the card wire, from the
connector CN602, disconnect the six pin connector
wire.
Disengage the two engagements "a" , remove the CD

5.
Servo control board.

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

Remove the front panel assembly.

1.
Remove the CD Traverse mechanism assembly.

2.
Remove the CD Servo control board.

3.
Remove the screw B retaining the disc stopper

4.
(See Fig.3).
Remove the three screws C retaining the T.bracket

5.
(See Fig.3).
From the clamper base section "c" , remove both of the

6.
edges fixing the rod(See Fig.2 and 3).
Remove the screw D retaining the clamper assembly

7.
(See Fig.3).
From the left side face of the chassis assembly, remove

8.
the one screw E retaining both of the return spring and
lock lever(See Fig. 4).
By removing the pawl at the section "d" fixing the return

9.
spring, dismount the return spring(See Fig.4).
Remove the three lock levers(See Fig.4).

10.

Disc stopper

T.Braket

MX-J270V

A

CD servo control board

CN604

CN
602

CN603

CN601

a

a

Fig.1

Clamper base

b

Rod

c

T.Braket

Fig.2

d

C

b

c

Clamper ass'y

Fig.3

B

C

Lod stopper
(C/J version only)

Return spring

C

D

E

Lock lever

Fig.4

1-13

MX-J270V

11.

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

12.
shown in Fig.6 from to the second or fifth hole on the
left side face of the CD Traverse mechanism assembly.

[Caution]

13.

14.

15.

Chassis assembly

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.

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
stoppend, 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.

Stopper

e

CD tray
assembly

Fig.5

Refer to Fig.7

Pulley gear

Pawl

CD tray assembly

g

f

Drive unit of elevator

Fig.7Fig.6

CD tray assembly

Motor pulley

Fig.8

1-14

Pawl ,

g

Fig.9

g'

MX-J270V

Removing the CD 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
mechanism assembly to the position shown in Fig.10.
Remove the four screw F retaining the CD mechanism
assembly.

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

For dismounting only the CD mechanism without

1.
removing the CD mechanism assembly, align the shaft
"j" of the CD 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 mechanism assembly in the arrow

2.
direction "l" , remove the assembly from the lifter unit
(See Fig.12).

Cam R1, R2 assembly

Cams R1, R2 assembly

Arrow

h

i

F

F

CD mechanism assembly

F

F

Fig.10

CD mechanism

j

Fig.11

Removing the CD pick unit
(See Fig.13 )

Move the cam gear in the arrow direction m . Then, the

1.
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

Arrow

k

Lifter unit

o

Stopper

Shaft

Fig.12

CD Pickup unit

n

m

Shaft

p

Stopper

Fig.13

Arrow

CD mechanism

Shaft

Cam gear

l

1-15

MX-J270V

Removing the actuator motor board
(See Fig.14, 15)

Absorb the four soldered positions "q" of the right and

1.
left motors with a soldering absorber(See Fig.14).
Remove the two screws G retaining the actuator motor

2.
board(See Fig.14).
Remove the two screws H retaining the tray select

3.
switch board(See Fig.15).

Removing the cam unit
(See Fig.15 to 18 )

1.

Remove the CD mechanism assembly.

2.

While turning the cam gear r, align the pawl "s" position
of the drive unit to the notch position(Fig.15) on the cam
gear r.
Pull out the drive unit and cylinder gear(See Fig.17).

3.
While turning the cam gear r, align the pawl "t" position

4.
of the select lever to the notch position(Fig.18) on the
cam gear r.
Remove the four screws I retaining the cam unit(cam

5.
gear r and cams R1/R2 assembly)(See Fig.18).

Motor L

G

Motor R

q

q

G

Actuator motor board

Fig.14

Chassis assembly

CN801

Fig.15

CN802

Drive unit

Tray select
switch board

Cylinder gear

CN804

Drive unit

s

H

Cam gear L

I

Cam gear r

Fig.16

I

Cams R1, R2 assembly

Cam unit

I

1-16

Fig.17

t

Select lever

Fig.18

MX-J270V

Removing the actuator motor and belt
(See Fig.19 to 22)

1.

Remove the two screws J retaining the gear bracket
(See Fig.19).

2.

While pressing the pawl "u" fixing the gear bracket in
the arrow direction, remove the gear bracket
(See Fig.19).
From the notch "v section" on the chassis assembly

3.
fixing the edge of gear bracket, remove and take out the
gear bracket(See Fig. 20).
Remove the belts respectively from the right and left

4.
actuator motor pulleys and pulley gears(See Fig. 19).
After turning over the chassis assembly, remove the

5.
actuator motor while spreading the four pawls "w" fixing
the right and left actuator motors in the arrow
direction(See Fig. 21).

[Note]

When the chassis assembly is turned over under
the conditions wherein the gear bracket and belt
have been removed, then the pulley gear as well
as the gear, etc. constituting the gear unit can
possibly be separated to pieces. In such a case,
assemble these parts by referring to the assembly
and configuration diagram in Fig. 22.

Pully gear

Gear bracket

Belt

Motor pulley

J

Fig.19

Actuator motor

Pulley gear
Belt
Motor pulley

J

Pawl

u

Chassis assembly

v

Gear bracket

Fig.20

Assembly and Configuration Diagram

Pulley gear

w

w

Fig.21

Pulley gear

Gear B

Cylinder gear

Gear B

Gear C

Select gear

Gross gear L

Fig.22

Gross gear U

Gear C

1-17

MX-J270V

Removing the cams R1/R2 assembly
and cam gear r (See Fig.23)

Remove the slit washer fixing the cams R1 and R2

1.
assembly.
By removing the two pawls "x" fixing the cam R1,

2.
separate R2 from R1.
Remove the slit washer fixing the cam gear r.

3.
Pull out the cam gear r from the C.G. base assembly.

4.

Slit washer

Cam gear r

Removing the C.G. base assembly
(See Fig.23 and 24)

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

[Caution]

To retassemble 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 "s" on the drive unit to that o f the notch
on the cam gear r. Then, make sure that the
gear unit is engaged by turning the cam gear r
(See Fig. 24).

K

Slit washer
Cam R2

Pawl

Cam R1

x

Cam switch board

C.G. base assembly

Pawl

x

Notch

Pawl

s

Cylinder
gear

Drive unit

Fig.23

Cam gear r

Cam R1, R2 assembly

Gear unit

Gear bracket

Fig.24

1-18

MX-J270V

< 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.

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)

1-19

MX-J270V

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

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

Fig.7 Fig.6

1-20

Capstan
belt B

Motor pulley

MX-J270V

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.

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.

Capstan motor

Joint
bracket

Flywheel R Flywheel L

Flywheel R Flywheel L

Slit
washer "a"

Slit
washer "b"

Reel pulse board

Solenoid

Solenoid

C

C

a

b

c

d

e

f

g

hi

Fig.8

Fig.9

Fig.11

Fig.10

1-21

MX-J270V

Adjustment method

Measuring devices necessary for
adjustment

1. Low-frequency oscillator
It must have the ability to output 600ohm from 0
dBs at an oscillation frequency of 20 Hz - 50 Hz.

2. Attenuator impedance: 600ohm

3. Electronic voltmeter

4. Distortion meter

5. Frequency counter

6. Wow and flutter meter

7. Test tapes
VT-712: tape speed and rotational distortion (3 kHz)
VT-724: standard level (1 kHz)
VT-703: head angle adjustment (10 kHz),
or use VT-73
VT-739: reproduction of frequency characteristics
(1 kHz, 63 Hz, 10 kHz)

Tuner section

Voltage input to the tuner ..................... +B: DC 5.7 V

VT: DC 12 V
Standard measuring output ..26.1 mV (0.28 V) /3ohm

Input locations ................ AM: standard loop antenna

FM: TP1 (hot) and TP2 (GND)

Standard settings for measuring
volume

Sound ................................................................. OFF

Effective hyper bass ........................................... OFF

Volume adjustment ...................................... VOL. 23

Precautions for measuring

1. Input 30 pF and 33 kohm to the IF sweeper output
and 0.082 F and 100 kohm to the sweeper input,
respectively.

2. Lower the output level of the IF sweeper as much
as possible in the adjustable range.

8. Blank tape
Type I : AC-225 (TDK-AD)
Type II : AC-514 (TDK-SA)

9. Torque gauge: Tension gauge for playback,

fast-forward and rewind.
FWD (TW211A), REW (TW212A)
and FF/REW (TW2231A)

Specifications for measurement

Power supply voltage .......AC 110 to 240 V (50/60 Hz)

Standard output .....................Speaker: 0.775 V/6ohm

Headphone:0.245V/32ohm
Standard frequency and input level

................ 1 kHz: AUX: -8 dBs

Input level for reproduction of recording characteristics

................... AUX: -28 dBs

Measuring output terminal ................. Speaker: JA303

Load resistance .................................................. 6ohm

Radio input signal

AM frequency ................................................... 400 Hz

Degree of modulation in AM band ....................... 30%

FM frequency ................................................... 400 Hz

Frequency deviation in FM band ................... 22.5 kHz

3. The IF sweeper needs no adjustment as it is a
fixed component.

4. It is not necessary to perform any kind of
adjustment on the MPX, as a ceramic oscillator is
used for measuring.

5. FM tracking adjustment is not necessary as a fixed
coil is used.

6. The grounding circuit is separate from the input
and output. Therefore, be sure to connect to ground
carefully when measuring both the input and output
voltages simultaneously using 2 channels of the
electronic voltmeter.

7. The speaker's minus terminal cannot be connected
to ground when using a BTL format amplifier.
Therefore, do not connect any type of ground wire
to this terminal. The OTL format is used with this
system.

8. Use a large wire to connect to the dummy
impedance generator when measuring the output.

9. Be sure to use a band pass filter (DV-12) when
using mixed tape.

1-22

Arrangement of Adjusting Positions

MX-J270V

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

Head amplifier
mechanism control board

Tape speed ADJ

Bias ADJ L

Bias ADJ R

1-23

MX-J270V

Tape Recorder Section

Items Measurement

Confirmation
of head angle

conditions

Test tape
:VT703(10kHz)
Measurement
output terminal
:Speaker terminal
Speaker R
(Load resistor:3ohm)
:Headphone terminal

Measurement method

1.Playback the test tape VT703(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.

Standard

values

Maximum
output

Adjusting

positions

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

Confirmation
of tape speed

Test tape
:VT712(3kHz)
Measurement
output terminal
:Headphone terminal

<Constant speed>
Adjust VR301 so that the frequency counter reading
becomes 3,000Hz 60Hz when playing back the
test tape VT712(3kHz)with the playback mechanism
or playback and recording mechanism after ending
forward winding of the tape.

Reference Values for Confirmation items

Items Measurement

Double tape
speed

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

conditions

Test tape
:VT712(3kHz)
Measurement
output terminal
:Speaker terminal
Speaker R
(Load resistance
:3ohm)
measurement
output terminal
:Headphone terminal

After setting to the double speed motor, confirm
that the frequency counter reading becomes
4,800+400/-300Hz when the test tape VT712
(3kHz) has been play back with the playback
mechanism.

When the test tape VT712(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.

Measurement method

Tape speed
of decks
(A and B)
:3,000Hz
60Hz

Standard

values

4,800+400/

-300Hz

60Hz or
less

VR301

Adjusting

positions

Playback
mechanism side

Both the playback
and recording &
playback
mechanism

Wow & flutter

Test tape
:VT712(3kHz)
Measurement
output terminal
:Headphone terminal

When the test tape VT712(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).

1-24

with in

0.25%
JIS(WTD)

Both the playback
and recording &
playback
mechanism

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 and AC-225 to
TYP ),and set the mechanism to the recording and
pausing conditions in advance.

2.After connecting 100ohm in series to the recorder
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 A (TYP ) and 4.20 A(TYP ).

Standard

values
AC-225
:4.20 A
AC-514
:4.0 A

MX-J270V

Adjusting

positions

LcH
:VR101
RcH
:VR201

Adjustment of
recording and
playback
frequency
characteristics

Reference frequency
:1kHz and 10kHz
(REF:-20dB)
Test tape
:TYP AC-514
Measurement input
terminal
:OSC IN

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 ,adjust VR101 for LcH and VR201 for RcH
so that the output deviation between 1kHz and
10kHz becomes -1dB 2dB.

Reference Values for Electrical Function Confirmation Items

Items Measurement

Recording
bias frequency

conditions

*Recording and
playback side forward
or reverse
*Test tape
:TYP AC-514
*Measurement
terminal BIAS TP on
P.C.board

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 ),and set the
mechanism to the recording and pausing
conditions in advance.

3.Confirm that the BIAS TP frequency on the
P.C.board is 100kHz 6kHz.

Measurement method

Output
deviation
between
1kHz and
10kH
:-1dB 2dB

Standard

values
100kHz
+9kHz

-7kHz

LcH
:VR101
RcH
:VR201

Adjusting

positions

Eraser current
(Reference
value)

*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 set the mechanism to the recording
and pausing condition in advance.

2.After setting to the recording conditions,connect
1Mohm in series to the eraser head on the recording
and playback mechanism side,and measure the
eraser current from both of the eraser terminal.

TYP
:120mA
TYP
:75mA

1-25

MX-J270V

Flow of functional operation until TOC read

Power ON

Power Key

Slider turns REST
SW ON.

Automatic tuning
of TE offset

Check Point

Check that the voltage at the pin 5
of CN602 is 0V (a moment)?

VREF

Tracking error waveform at TOC reading

pin 25 of
IC601(TE)

Approx

1.8V

Tracking
servo

Disc statas
to rotate

off statas

Automatic measurement
of TE amplitude and
automatic tuning of
TE balance

Approx.3sec

Tracking
servo
on statas

Disc to be
braked to stop

TOC reading
finishes

500mv/div
2ms/div

Fig.1

Laser ON

Detection of disc

Automatic tuning of
Foucus offset

Automatic measurement of
Focus A-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
pin3 of IC601 + side is + 5V?

Confirm that the Focus error
S-cuve siganl at the pin27 of
IC601 is approx.2Vp-p

Confirm that the siganl from
pin24 IC603 is 0V as a
accelerated pulse during
approx.400ms.

Confirm the waveform of
the Tracking error signal
at the pin25 of IC601 (R612)
(See fig-1)

1-26

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 TP602

MX-J270V

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 (Fig.1)
When the life of the laser diode has expired,
the following symptoms wil appear.
(1) The level of RF output (EFM output:ampli
tude of eye pattern) will below.

Is RF output

1.1 0.15Vp-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.

(Fig.1)

(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.

Check the eye-pattern at TP1.

Finish.

1-27

MX-J270V

Description of major ICs

AN8806SB (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

/RFDET

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
FE­ FE 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

24 25

30

1-28

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

PDE
PDF

PD BD

TE BPF

VDET

CROSS
TE OUT

TE-

FE OUT

FE-

/RFDET

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-J270V

1-29

MX-J270V

BA15218F (IC852) : OP AMP.

1OUT1

2-IN1

-

8

7

CC

V

OUT2

1

3+IN1

+

-

-IN2

6

2

4

+

+IN2

5GND

BA15218N (IC301,303,305,307) : Dual Ope. Amp.

+

+

1

-

1 2 3 4 5 6 7 8

OUT1 +IN1 +IN1

+IN2 -IN2 OUT2

GND

2

-

Vcc

TA8409S (IC851,852) : Motor driver

1.Pin layout 2.Pin function

1

IN2

VCC

OUT 2

NC

GND

VS

OUT 1

VREF

IN1

2
3
4
5
6
7
8
9

TA8409S

INPUT OUTPUT MODE

IN1

IN2

0

0

1

0

0

1

1

1

TC7SH04FU (IC108) : CMOS Inverter

NC

IN A

1

2

5

VCC

OUT1

H

L
L

OUT2

L

H

L

MOTOR

STOP
CW/CCW
CCW/CW

BRAKE

GND

3

4

OUT Y

1-30

BA6897FP (IC801) : 4channel driver

MX-J270V

CH1-OUTA

CH1-OUTB

CH1-INA

CH1-INB

TEST1

TEST2

MUTE

GND

CH2-INB

CH2-INA

CH2-OUTB

CH2-OUTA

GND

D.BUF

1

2

D.BUF

3

4

5

6

7

8

9

10

D.BUF

11

12

D.BUF

13

- +

Level

shift

Level
shift

- +

+ ­Level
shift

T.S.D

DRIVER

MUTE

+-

-+

Level
shift
+ -

-+

+-

D.BUF

D.BUF

-+

D.BUF

D.BUF

28

27

26

25

24

23

22

21

20

19

18

17

16

GND

CH4-OUTA

CH4-OUTB

CH4-INA

CH4-INB

BIAS IN

Vcc

Vcc

CH3-INB

CH3-INA

CH3-OUTB

CH3-OUTA

OP IN(+)

OP-OUT

14

-+

15

OP IN(-)

1-31

MX-J270V

BH3854 (IC306) : E.Volume

1.Terminal layout

2.Block diagram

IN2

RIP

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

NF2

32 17

116

TC

BVN2

BIN2

BVO2

2K

TIN2

TVO2

OUT2

10K

VC

10K

10K

BC

CLK

DATA

LATCH

VREF

( BASS ) (TREBLE)

TONE CONTROL

20K

Vcc

20K

20K

47K

47K

20K

VOLUME

MATRIX SURROUND SOUND

VOLUME

VOLUME

3.8V

CONTROL

Ref.Voltage

VOLUME

TONE CONTROL

( BASS )

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

IN1

A-GND

NF1

BVN1

BIN1

(TREBLE)

20K

BV01

TIN1

TVO1

Vcc

OUT1

Vcc

200K

SC

PORT1

PORT2

PORT3

PORT4

VSS

Volume, bass treble and surround can be also controlled externally by giving DC voltage
through VC (volume control) terminal, BC (bass control) terminal, TC (treble control)
terminal and SC (surround control) terminal.
Impedance of VC, TC and BC terminals is 10 K (Typ.).
Impedance of SC terminal is 200K (Typ.).

1-32

MX-J270V

PIN PIN Name Function PIN PIN Name Function

1
2
3
4
5
6
7
8

9
10
11

12
13
14
15
16

A-GND
IN1
NF1
BVN1
BIN1
BV01
TIN1
TV01
OUT1
Vcc
SC

PORT1
PORT2
PORT3
PORT4
VSS

Analog system ground
Terminal for 1ch volume

input
Terminal for gain adjustment
of input step AMP
Terminal for connection of
1ch low-frequency filter
Terminal for connection of
1ch low-frequency filter
Terminal for connection of
1ch low-frequency filter
Terminal for connection of
1ch high-frequency filter
Terminal for connection of
1ch high-frequency filter
Terminal for 1ch volume
output
Terminal for power supply

Terminal for time constant
attachment for switching
shock protection

Terminal for port output
Terminal for port output
Terminal for port output
Terminal for port output
Digital system ground

17
18
19
20
21

22

23

24
25
26
27
28
29
30
31
32

VREF
LATCH
DATA
CLK
BC

TC

VC

OUT2
TV02
TIN2
BV02
BIN2
BVN2
NF2
IN2
RIP

Terminal for 3.8V reference
voltage output
Terminal to receive latch data

Terminal to receive data
Terminal to receive clock
Terminal for time constant

attachment for switching
shock protection

Terminal for time constant
attachment for switching
shock protection

Terminal for time constant
attachment for switching
shock protection

Terminal for 2ch volume
output
Terminal for connection of
2ch high-frequency filter
Terminal for connection of
2ch high-frequency filter
Terminal for connection of
2ch low-frequency filter
Terminal for connection of
2ch low-frequency filter
Terminal for connection of
2ch low-frequency filter
Terminal for gain adjustment
of input step AMP
Terminal for 2ch volume
output
Terminal for filter

BH3854

3. Pin function

1-33

MX-J270V

BU2173F (IC105) : VCO

1.Terminal Layout 2.Block diagrams

VDD
TSTO
XTALI

XTALO
CTRLA
CTRLB
CTRLC

TSTI

VSS

1
2
3
4
5
6
7
8
9

18
17
16
15
14
13
12
11
10

3.Pin function

Pin No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16
17
18

AVDD
FPUT4
VDDIO
FOUT1
TEST
FOUT2
VSSIO
FOUT3
AVSS

Symbol I/O Function

VDD
TSTO
XTALI

XTALO
CTRLA
CTRLB
CTRLC

TSTI

VSS

AVSS

FOUT3

VSSIO

FOUT2

TEST
FOUT1
VDDIO
FOUT4

AVDD

-

Digital VDD .
Use open this pin for normal operation.

I

Reference oscillation input.

O

Reference oscillation output.
Frequency select for V-CD/CD-G.
Force H for normal operation.
PAL/NTSC select for CD-G mode.
Force L for normal operation.

-

Digital GND.

-

Analog GND.
Use open this pin for normal operation.

-

I/O GND.

O

Clock output (2).
Force L for normal operation.

O

Clock output (1).

-

I/O VDD .

O

Clock output (4).

-

Analog VDD .

1-34

1
2
3
4
5
6
7

8,9

10

11 15

16
17
18
19
20
21
22

23 28

29
30,31
32,33

34 37

38

39 42

43

44

45

46

47

48

49

50
51,52

53 57

58

59 63

64

65

66 72

73

74 76

77

78 80

81

82 84

85

86 89

90

91 94

95

96
97
98

99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122

123
124
125
126
127
128

HA2

DS

W/R

IRQ

DTACK

HD0

IO VDD

HD1,2

CKT VSS

HD3 7

IOVSS

TEST

XTLVSS

XTLIN
XTLOUT
XTLVDD

CKTVDD

MD0 5

IOVDD

MD6,7

MCE01

MD8 11

IOVSS

MD12 15

5VVDD

LCAS

LCASIN

CKTVSS

MWE

UCAS

IOVDD

UCASIN

RAS0,1
MA9 5

IOVSS

MA4 0

PIO0
IOVDD
VD0 6

IOVSS

VD7 9

CKTVDD

VD10 12

IOVDD

VD13 15

CKTVSS

VD16 19

IOVSS

VD20 23

VSYNC

HSYNC

VOE

VCOVDD

VCLK

VCOVSS

RESET

IOVSS

C2PO

CDLRCK

CDDATA

CDBCK

DALRCK

DADAT A

DABCK

IOVDD

XCK

CKTVDD

PIO12
PIO11
PIO10

PIO9
PIO8
PIO7
PIO6
PIO5
PIO4
PIO3

5VVDD

PIO2

IOVSS

PIO1

HA0
HA1

Host address.
Data strobe terminal.
I/O read terminal.
Interact terminal.
Acknowledge data output.
Host data terminal.
Power supply for input/output.
Host data terminal.
Connected to GND.
Date data terminal.
Ground terminal for Input/Output.
Test terminal.
Oscillator ground terminal.
Oscillator input terminal.
Oscillator output terminal.
Power supply for oscillator.
Power supply.
DRAM data / ROM data terminal.
Power supply for Input/Output.
DRAM data/ROM data terminal.
Chip enable output for ROM bank.
DRAM data/ROM data terminal.
Ground terminal for Input/Output.
DRAM data/ROM address terminal.
Power supply (+5V).
DRAM LCAS/ROM address terminal.
DRAM LCAS input.
Connect to GND.
DRAM write enable signal output.
DRAM UCAS/ROM address terminal.
Power supply for Input/Output.
DRAM UCAS input terminal.
DRAM RAS0,1 terminal.
DRAM data/ROM address terminal.
Ground terminal for Input/Output.
DRAM data/ROM address terminal.
ROM address extension terminal.
Power supply for Input/output.
Video data terminal
(R6/CrCb6/YCrCb066)
Ground terminal for Input/Output.
Video data terminal
(R7/CrCb7/YCrCb7)(G0,1/Y0,1)
Power supply.

Video data terminal (G24/Y24)
Power supply for Input/Output.
Video data terminal (G57/Y57)
Connect to GND.
Video data terminal(B0B3)
Ground terminal for Input/Output.
Video data terminal(B47)
Vertical comparator/Composite
comparator output.
Horizontal synchronizing signal.
Video output enable signal.
Power supply of VCO.
Video clock terminal.
Ground of VCO.
Reset signal input.
Ground terminal for Input/Output.
Data error flag input.
L/R word clock input.
Bit serial data input.
Bit clock output.
L/R clock output.
Bit serial PCM audio signal output.
Bit clock output.
Power supply for Input/Output.
Bit clock input terminal.
Power supply.
Interact 2 signal output.
Non connect.
Host enable signal input.
Boot ROM enable signal input.
Non connect.
DAC emphasis signal output.
CD-DA emphasis signal output.
Non connect.
FMV detect signal output.
CD-DA video CD select signal
output Low:Video CD.
Power supply (+5V).
Non connect.
Ground for Input/Output.
Non connect.
Host address input.
Host address input.

I
I

I
O
O

I/O

-

I/O

-

I/O

-

I

I

I
O

-

-

I/O

-

I/O

O

I/O

-

I/O

-

O

I

­O
O

-

O
O

­O
O

­O

­O

-

O

-

O

-

O

-

O

I/O

I/O

I

-

I/O

­I

­I
I
I

I
O
O
O

-

I

­O
O

I

I
O
O

I
O
O
O

-

O

-

O

-

-

Pin No.

Symbol

I/O

Function

Pin No.

Symbol

I/O

Function

CL480-F1 (IC101) : MPEG-1 Audio / Video decoder

MX-J270V

1-35

MX-J270V

HD74HCT244 (IC113) : Buffer

1. Terminal la yout

2. Block diagram

1-36

1. Pin layout

1
2
3
4
5
6
7
8
9
10
11

22
21
20
19
18
17
16
15
14
13
12

XT

FM/AM

CE

DI

CLOCK

DO

FM/ST/VCO

AM/FM

SDIN

XT
GND
LPFIN
LPFOUT
PD
VCC
FMIN
AMIN

IFCONT
IFIN

Pin
No.

1
2
3

4

5
6

7

8
9
10
11

Pin
No.

12
13
14

15

16
17

18

19
20
21
22

Symbol

XT

FM/AM

CE

DI

CLOCK

DO

FM/ST/VCO

AM/FM

LW

MW

SDIN

Symbol

IFIN

IFCONT

AMIN

FMIN

VCC

PD

LPFOUT

LPFIN

GND

XT

Function
X'tal oscillator connect (75kHz)
LOW:FM mode
When data output/input for 4pin(input) and
6pin(output): H
Input for receive the serial data from
controller
Sync signal input use
Data output for Controller
Output port
"Low": MW mode

Open state after the power on reset
Input/output port
Input/output port
Data input/output

Function
IF counter signal input

IF signal output
Not use

AM Local OSC signal output

FM Local OSC signal input
Power suplly(VDD=4.5-5.5V)
When power ON:Reset circuit move
PLL charge pump output(H: Local OSC
frequency Height than Reference frequency.
L: Low Agreement: Height impedance)
Output for active lowpassfilter of PLL
Input for active lowpassfilter of PLL
Connected to GND
X'tal oscillator(75KHz)

I/O

I

O

I

I

I

O

O

O
I/O
I/O
I/O

I/O

I

O

-

I

I

-

O

O

I

­I

Reference

Driver

Phase

Detector

Charge Pump

Unlock

Detector

Universal

Counter

Swallow Counter

1/16,1/17 4bit

12bit

Programmable

DriverS

Swallow Counter

1/16,1/17 4bit

Data Shift Register & Latch

Power

on

Reset

C

2B

I/F

1/2

782

11

13

21

17

6

5

4

3

15

16

22

1

18
19

20

12

2. Block diagram

3. Pin function

LC72136 (IC2) : PLL Frequency Synthesizer

MX-J270V

1-37

MX-J270V

LH531HEG (IC102) : 1M ROM

1.Terminal Layout

VPP

A16
A15
A12

A7
A6
A5
A4
A3
A2
A1
A0
D0
D1
D2

GND

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

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

VCC

A18
A17
A14
A13

A8
A9

A11

CE

A10

CE

D7
D6
D5
D4
D3

2.Block diagram

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

22

CE

BUFFER

ADDRESS/BUFFER

CE

ADDRESS/DECODER

TIMING

GENERATOR

MEMORY

MATRIX

(131,072 8bit)

CORAM

SELECTOR

SENS AMP.

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

A13,A14

D17,D18

32

Symbol

VPP

A16
A15

A12
A7A0
D0D2

GND

D3D7

CE

A10

CE

A11

A9,A8

VCC

I/O

­I
I
I
I

O

-

O

I
I
I
I
I
I

O

-

OE

BUFFER

24

CE

Function
Power supply.
Adress input.
Adress input.
Adress input.
Adress input.
Data output.
Connect to GND
Data output.
Chip enable input.
Adress input.
Chip enable input.
Adress input.
Adress input.
Adress input.
Data output.
Power supply.

BUFFER
OUTPUT

32

16

GNDVCC

13 141517 18 19 20 21

D0 D1 D2 D3 D4 D5 D6 D7

1-38

MN171601AK8J2 (IC111) : HOST Micro Computer

1.Terminal Layout
64 49

MX-J270V

1

16

17 32

2.Pin Function
Pin No.

1
2
3
4
5
6
7
8

9
10
11
12

13 15

16

17 24
25 39

40

41 48

49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64

Symbol

480RST

MREQ

ACTINT

GDET

GND

DTACK

GND
GND

DIR

N/PAL

RGB

W/R

HA02

DS

HD07

SA014

SCS
SD18
SR/W

PAL60

RESET

X1
X2

VSS

OSC2
OSC1

VDD

HREQ
SRCLK
M2HDT

M2MDT

HRDY

VCD/G

PALCDG

48

33

I/O Function
O

I/O

O

I/O

O
O

I/O

O

O
I/O
I/O

O

O

O

O

O

O

Reset signal output.
Input the transfer request data signal.

I

Interact 2 signal input.

I

CD-G detect terminal H:CD-G

I

Connected to GND.

­Acknowledge signal input.

I

Connect to GND.

­Connect to GND.

­Input/Output control for IC114.

Not use.

­Video out control signal (H:RGB L:composite)

Read/Write signal input/output.
Address signal output for MPEG LSI.
Data strobe signal output.
Data terminal for MPEG LSI.
SRAM address signal output.
SRAM chip select signal output.
SRAM data Input/Output terminal.
SRAM read/write signal input/output.
Not use.

­Reset signal input.

I

Non connect

­Non connect.

­Connect to GND.

­Non connect.

­Clock input terminal.

I

Power supply.

­Communication signal output.

Clock signal for data request.
Serial data output.
Serial data input.

I

Communication signal output.
Video swith switching signal output.
CD-G PAL/NTSC clock select terminal.

1-39

MX-J270V

MN35510 (IC651) : Digital servo & digital signal processor

1. Terminal Layout

2.Block Diagram

LRCKIN(MSEL)
BCLK(SSEL)
SRDATAIN
(PSEL)

IOSEL

CLVS
CRC
BLKCK
CLDCK
SBCK
SUBC
DEMPH
RESY
FLAG6(RESY)

SSEL
SQCK
SUBQ
AVDD2

AVDD2

PCK
EFM
PLLF
DSLF
IREF
DRF
ARF
RSEL
PSEL

MLD
MCLK
MDATA

CK384(EFM)
VCOF
BYTCK
SMCK
FCLK
CSEL
MSEL
X2
X1

ÊSTAT

DIGITAL
DEEMPHSIS

SUB
CODE
BUFFER

DSL.
PLL
VCO

VCO

ITUNING
GENERATION
PITCH
CONTROL

20 ~ 1

21

~

40

41 ~ 60

8TIMES
OVER SAMPUNC
DIGITAL FILTER

EFM
DEMODULATION

SYNC
INTERPOLATION

SUBCODE
DEMODULATION

MICRO
COMPUTER
INTERFACE

CONVERTER

A/D

80

~

61

CIRC
ERROR
CORRECTION
DEINTERLEVE

CLV
SERVO

1BIT
DAC
LOGIC
S

16k
SRAM

INPUT

PEM
(R)

PEM
(L)

D/A
CONVERTER

OUTPUT

DIGITAL
AUDIO
INTERFASE

DIGITAL
AUDIO
INTERFASE

INTER POLATION
SOFT MUTING DIGITAL
ATTENUATION
PEAK DETECTIVE
AUTO CUE

PORT

SERVO
TIMING GENERATOR

AVSS1
AVDD1
OUTR

OUTL

FLAG
IPFLAG

TX

ECM

PC

LRCK
SRDATA
BCLK
DMUTE

TRKV
KICK
VREF
TRVSTR
ECS
TVD
TRD
FOD
TBAL
FBAL
TOFS
TES
/TLOCK
/FLOCK
PLAY
LDON
WVEL
SENSE

D

/

D

V

V

V

S

D

D

S

D

D
1

/

R

V

T

S

S

E

T

S

S

1

T

F
E

1-40

R

T

F

E

E
N
V

T
R
C
R
S

B

V

D

D

O

E
T

/
R
F
D
E

O
F
T

3. Description

Pin
No.

symbol

I/O

O
O
O

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

Pin
No.

symbol

I/O

42

41

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

O

I

I
I
I

O

BCLK
LRCK
SRDATA
DVDD1
DVSS1
TX

MCLK

MDATA
MLD

I

I

I
SENSE
FLOCK
TLOCK
BLKCK
SQCK

O

O

O

O

O

O

I

I

I

I

I

SUBQ
DMUTE

STATUS

I

O
O

RST
SMCK

PMCK

TRV
TVD

PC

ECM

ECS

KICK

TRD

O

O
O

O

O

O

O

I

I

I

FOD

VREF

FBAL

TBAL

FE

TE

I

I

I

I

I

RF ENV

VDET
OFT
TRCRS

I

O

RFDET

BDO
LDON

Description

Not used

Not used

Not used

Connected to GND
Digital audio interface output

Power supply (Digital)

Micom command clock signal input

Micom command load signal input

Micom command data input

Focus lock signal output Active :Low

Sence signal output

(Data is latched at signal's rising point)

Tracking lock signal output Active :Low

sub-code - block - clock signal output
Outside clock for sub-code Q resister input
Sub-code Q -code output
Connected to GND

Status signal
(CRC,CUE,CLVS,TTSTOP,ECLV,SQOK)

Reset signal input (L:Reset)

Not used

Not used

Traverse enforced output

Traverse drive output

Not used

Spindle motor drive signal (Enforced

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

signal output)

Kick pulse output
Tracking drive output

Focus drive output

Reference voltage input pin for D/A

output block (TVD,FOD,FBA,TBAL)

Focus Balance adjust signal output

Tracking Balance adjust signal output

Focus error signal input(Analog input)
Tracking error signal input(Analog input)
RF envelope signal input(Analog input)

Vibration detect signal input(H:detect)

Off track signal input(H:off track)

Track cross signal input

RF detect signal input(L:detect)

BDO input pin(L:detect)

Laser ON signal output(H:on)

I
I
I

I/O

I/O

I

I

III

I

Description

Not used
Not used

TES
PLAY

WVEL
ARF
IREF
DRF

DSLF

PLLF

Tracking error shunt signal output(H:shunt)

RF signal input
Reference current input pin
Bias pin for DSL

Not used

Loop filter pin for DSL
Loop filter pin for PLL

Power supply(Analog)

Connected to GND(Analog)

Not used

Not used

Not used

Not used

Not used

I

I

I

I

Connected to GND(for X'tal oscillation
circuit)

I

O

I

O

O

I

I

I

I

I

I

I

III

I

II

I

I
I

Not used
Not used
Not used

Not used

Not used
Not used

Not used
Not used

Not used

Pull up

Connected to GND

Connected to GND
Connected to GND

pull up

pull up
pull up

Power supply(Digital)

Lch audio output

Connected to GND
Rch audio output

Power supply(for X'tal cscillation circuit)

Input of 16.9344MHz X'tal oscillation circuit

Output of X'tal oscillation circuit

VCOF
AVDD2

AVSS2

EFM

PCK
PDO

SUBC
SBCK

VSS

XI
X2

VDD

BYTCK
CLDCK

FLAG

IPPLAG

FLAG

CLVS

CRC

DEMPH

RESY

IOSEL

TEST

AVDD1

OUT L

AVSS1

OUT R

RSEL

SSEL

MSEL

PSEL

CSEL

MX-J270V

1-41

MX-J270V

TA2057N (IC1) : FM/AM IF AMP & Detector

1.Block Diagrams

FM
IF IN

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

AM
MIX
OUT Vstb QUAD FM OUT AM OUT MPX IN LPF 1 LPF 2 VCO L OUT

REG

FM
IF

AM
IF IN

FM
DET

AM

VCO

DIVIDE

DECODE

MUTE

AM
MIX

123456789 1110 12

AM
RF IN

2.Pin Function

Pin
No.

I/O

1

I
2
3
4
5
6
7
8
9

10
11

12

AM S.SENS
FM S.SENS

­AM OSC OUT

O

-

I

-

O
O
O

O

S.SENSFMS.SENS

Symbol
AM RF

AM OSC

VCC
AGC

GND
IF OUT
TU IND
ST IND

Rch OUT

AMRF signal input

AM local oscillation circuit
AM local oscillation signal output
Power supply
AGC voltage input terminal
Connect to GND
IF REQ signal output to IC2
Indicator drive output when tuning
Stereo indicator output
"H"mono . "L"stereo
Output Rch

I/O

O
O
O

O

I
O
O

FM QUAD

I

I

­AM MIX OUT

O

I

LEVEL
SW

IF
BUFF

IF REQ
SW

Symbol

Lch OUT

VCO

LPF2

LPF1

MPX IN
AM OUT
FM OUT

AM IF IN

Vst

FM IF IN

TUN
LED

/REQ

Output Lch
Voltage controlled terminal
When voltage of terminal is MONO
at "H" and ST at "L"
When voltage of terminal is AM at
"H" and FM at "L"
Multi plex signal input
AM detection signal output
FM detection signal output
Bypass to FMIF
Input of AMIF signal
Fixed voltage output terminal
Output terminal for AM mixer
Input of FMIF signal

TUN
LED

AM
IF

AM
OSC

AM
OSCAMOSC

BUFF

OUT

Function Function

AM
DET

AGC

Vcc AGC GND IF OUT

Pin
No.

13
14
15

16

17
18
19
20
21
22
23
24

AM/FM
MONO
SW

ST
LED

ST
LED

R OUTAM

1-42

TC9409BF (IC601) : KARAOKE DSP

MX-J270V

1-43

MX-J270V

TDA7295 (IC101, IC201) : Audio AMP

1. Pin arrangement chart

2. Block diagram

15
14
13
12
11
10

9
8
7
6
5
4
3
2
1

BOOTSTRAP

-Vp (POWER)
OUT
+Vp (POWER)
N.C.
N.C.
MUTE
STAND-BY

-Vs (SIGNAL)
+Vs (SAIGNAL)
BOOTSTRAP
N.C.
SUR
NON INVERTING INPUT
INVERTING INPUT
STAND-BY GND

+Vs

IN+

IN-

BIPOLAR

TRANSCONDUCTANCE

INPUT STAGE

MOS GAIN &

LEVEL SHIFTING

STAGE

MOS OUTPUT STAGE

BOOTSTRAP

OUTPUT

-Vs

SHORT CIRCUIT

PROTECTION

1-44

MX-J270V

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.20880

Printed in Japan
200011(V)

Block diagram

MX-J270V

HEAD

PHONE

BOARD

FW851

5

4

ANTENNA TERMINAL

AM

FM

MAIN BOARD

AM

L2

COIL BLOCK

JA1

RF IN

TU1 FM

TUNER PACK

1

IF OUT

13
17
18
19

T2

23 21

IC1 FM AM IF/DET/MPX

24

CF1

Q1

AM IF

FM IF

AF

CF2

AMP

TRAP

114KHz

CN306

MIC/HEADPHONE

CN305

14

3

IC101 POWER AMP

1

3

IC307 BASS BOOST AMP

3

CN701

CONTROL BOARD

CN702

FW705

FW704

FW705

FW704

CN305

CN307

CN302

5
4
2

3 1

MIC

FW852

CN301

INPUT

SOURCE SELECT

IC302

TO SPK

JA303

RY901

24

31

IC306 VOL.AMP&EQ

2

IC701

FL DISPLAY

CN700

FW703

FW702

FW701

1

ABC

FW703

FW702

FW701

SW. BOARDS

CASSETTE BOARD

CN306

LINE OUT

CN309

CN651

CN152

CN151

CD SERVO BOARD

AUX IN

CN304 CN303 CN311

CN312

CN601

CN602

DSP BOARD

CN101

VIDEO CD BOARD

VIDEO BOARD

CN102

CN103

O/P

VIDEO

CN310

2-1

MX-J270V

Standard schematic diagrams

Power supply section

5

4

3

Version:U/UX/US

SHEET 2/8

FW999

S1
S1
S1

S2
S3
S3

S2/S3

S4
S4
S4

1
2
3
4
5
6
7
8
9
10

AC110V

3

1

7

5

6

2

4

F998 T 1.25A

F997

8

T 1.25A

1

AC127V

5

3

7

4

8
9
10
11

12
13
14 2

15

16

17

Th-Fuse

6

8

2

AC 110V / 127V / 220V / 230-240V 50Hz/60Hz

7

1

3
4
6
5

T999
TRANSFORMER

AC220V

5

3

1

7

4

5

3

1

7

4

F996 T 800mA

AC230-240V

5

6

8

2

3

6

1

8

2

7

4

F999

T 1.6A

6

8

2

S999

VOLT.-SEL

Mains

Plug

2

1

2-2

ABCD

Parts are safety assurance parts.
When replacing those parts make
sure to use the specified.

SHEET 1/8

ABCD E F G

1

2

3

4

5

2-3

MX-J270V

TAPE P.B. signal

DSP signal

MIC signal

FM/TUNER signal

CD/AUDIO signal

MAIN signal

AM signal

VIDEO/CD signal

Parts are safety assurance parts.
When replacing those parts make
sure to use the specified.

SHEET 2/8

SHEET 7/8

SHEET 7/8

SHEET 8/8

SHEET 4/8

SHEET 8/8

SHEET 1/8

SHEET 3/8

SHEET 3/8

SHEET 5/8

SHEET 5/8

SHEET 6/8

L2 MW Block Coil

R116
11K

+

C208

25V10

Q312

KTA1267

R211 470

JA301

AUX INPUT

R-CH

R110 15K

R106 1K

Q101

2SC3576

Q201

2SC3576

D302

1SS133

D303

1SS133

R206

1K

R109

4.3K

Q301

DTA114ES

123

G

4

567

VCC

8

+

-

+

-

IC301

BA15218N

GND

Q202

2SC3576

R209

4.3K

R111

470

R119 3.3K

R301 100K

R314

10K

R305 220

R204 2.2K

R313

100K

123

G

4

567

VCC

8

+

-

+

-

IC307

BA15218N

11421531641751861978910111213

CN309

R114
47K

+

C304

10V100

C301

0.001

+

C203

25V10

C201

220P

+

C105

25V10

+

C307 10V100

+

C319

16V47

+

C207

25V10

+

C308

16V47

+

C205

25V10

R225

10K

R125

10K

C215 0.047-M

C216 0.039-M

C217 0.01-M

C115 0.047-M

C116 0.039-M

C117 0.01-M

C320

0.022

+

C306

16V47

+

C103

25V10

C316 150P

+

C315

50V4.7

+

C314

50V4.7

+

C313

50V4.7

+

C312

25V10

+

C339

50V0.22

R319

2.2K

R320

1K

R321

1K

R316 330K

R315

180K

+

C317

10V100

C118 470P

C218 470P

+

C114 25V10

+

C214

25V10

LATCH

DATA

SCK

R226
120K

R126
120K

C219

0.12-M

C119 0.12-M

C120

0.12-M

C220

0.12-M

+

C221

10V100

+

C121

10V100

R128

2.2K

R129

8.2K

R131

8.2K

R127

2.2K

R227

2.2K

R228

2.2K

R231

8.2K

R229

8.2K

Q204

KTC3199

Q104

KTC3199

R130
10K

R230 10K

R324 100

R325 1.5K

D315

MTZ5.1JA

+

C322 16V47

D317

1SS133

D316

1SS133

+

C110

25V10

R326 22K

R330

3K

R323 5.6K

+

C122
25V10

+

C222

25V10

C101

220P

R208

47K

R115 4.3K

12345

6

CN310

12345

CN308

1
2
3
4
5
6
7
8
9
10

CN302

R221

4.7K

R121

4.7K

R216
11K

R215

4.3K

+

C107

25V10

R214

47K

L302

10uH

+

C204 25V10

+B
MIC

AG

REC-OUT

TO TAPE PCB

REC-L

NC
REC-R
SW8V

PB-L
AG
PB-R
MSI
MB
MG

D306

1N4003

L303

F.B

+

C341

10V1000

C344 0.01

+

C340

10V470

+

C240

50V3.3

L304

F.B

R354

100K

D.GND

SCK

SDATA

DSPSTB

DSPRESET

FTU

R132

2.2K

R232

2.2K

R342

2.2M

R344

47K

R343 22

R345

100K

C330

0.015-M
C333

680P

C332

0.0018
C331
33P

+

C334 50V1

Q313

KTC3199

Q314

KTC3199

D322

1SS133

R346 470

+

C335

10V100

Q315 KTC3199

Q916
2SB1375

+

C337

50V47

C925

0.01

+

C922 16V22

+

C921 25V4.7

Q914
KTC3199

Q913

2SA1175

D916

MTZ3.9JAT

R930

1K

R929 100K

R928

100

TO SPEAKERS

TO HEADPHONE PCB

AM-IN

FM-G

FM-IN

AM-G

D.GND

D.GND

5V

5V

Y.OUT

C.OUT

VIDEO
V.GND

PERIOD

LATCH

PRI

SPK

FTU

MRDY

SMUTE

POUT

DSPSTB

MRESET

OSD

OSCS

OSCK

OSDATA

MPX

MSIN

FAUX

SAFETY

6V

NC

MCMD

MSTAT

SCK

SDATA

DG

FL1

FL2

-35V
MCLK

D327

1N4003

R924 680

R926

5.6K

R347 10K

D325 1SS133

D324 1SS133

TO MIC SECTION

L-CH

+

C347
16V47

+

C202

50V1

R348

3.3K

ST-BY GND1IN -2IN +3IN + MUTE4N.C5BOOST6VDD-PRE7VSS-PRE8ST-BY9MUTE10N.C11N.C12VDD-OUT13OUTPUT14VSS-OUT

15

IC101

TDA7295

ST-BY GND

1

IN -

2

IN +

3

IN + MUTE

4

N.C

5

BOOST

6

VDD-PRE

7

VSS-PRE

8

ST-BY

9

MUTE

10

N.C11N.C

12

VDD-OUT

13

OUTPUT

14

VSS-OUT

15

IC201
TDA7295

RY901

RELAY

JA303

SP-TERMINAL

1

2

3

4

CN305

1

2

3

4

5

6

7

8

9

10

CN901

D903

1N5401

D901

1N5401

D902

1N5401

D904

1N5401

D905

1N4003

D906

1N4003

C904

0.068-M

C901

0.068-M

C903

0.068-M

C902

0.068-M

C907

0.1-M

+

C905

50V2200

+

C906

50V2200

+

C908

25V3300

R932

10K

D911

1SS133

D912

MTZ5.1JA

D909
MTZ33JCT

D910

MTZ6.2JAT

D908
1N4003

+

C912

50V4.7

+

C926 6.3V470

+

C911
50V22

C913

0.01

+

C910
63V47

Q901

2SA934(R)

R903

2.2K

R904 100K

+

C914

50V1

Q903

DTC114YS

Q902

DTC114YS

R905

10K

R906

1K

Q316
DTA114ES

+

C336

25V10

L101

R137 82K

R139

1.2K

R136

560

R138
100K

R135 100K

R329

1K

R328

22K

C128

0.015-M

C127 10P

C125

100P

C124

100P

C131

0.1-M

C130

0.1-M

+

C129

50V22

+

C126

16V47

+

C324

50V10

R242

10 UNF.C (1/4W)

L201

R237

82K

R236

560

R239

1.2K

R235 100K

R238
100K

C225

100P

C228

0.015-M

C227

10P

C224 100P

C230

0.1-M

C231

0.1-M

+

C229

50V22

+

C226

16V47

+

C323

50V10

D318

1N4003

D321

MTZ24C

Q206

2SC3576

R234

4.7K

R148

680 UNF.C (1/4W)

R248680 UNF.C (1/4W)R249

820

R149 820

Q106

2SC3576

R250

10K

R150

10K

+

C915

25V10

R147

56K

R331

470K

L +

L -

R +

R -

SPK-SW
R-OUT
GND
L-OUT

D913 1SS133

Q905

2SA1175

Q904

2SB1375

Q906

DTA144TS

Q909

KTC3199

Q908

KTC3199

Q907

DTC144TS

Q205 2SC3576 Q105

2SC3576

R134

4.7K

R907 470

R910

1

R909

1

R908

1

R911

820

R918

1K

R913

910

R917

470

R914

750

R912

6.8K

R921

4.7K

R919 4.7K

R920

2.2K

C916

220P

R922

4.7K

+

C917

50V22

+

C920

16V22

D914

MTZ9.1JA

R339

1K UNF.C (1W)

R341 10K

S4
S4
S4
S2/S3
S3
S3

S1
S1
S1

EP901

GND

R133

4.7K

R233

4.7K

R146
100K

R246

100K

R333
100K

R336

10K

R334

10K

R335
22K

R337 1.2K

+

C328

16V22

+

C329

50V1

Q310

KTC3199

Q311
KTC3199

Q309

KTA1267

D320
1SS133

D201
1SS133

D101

1SS133

+

C327

16V47

R332

100K

R247

56K

+

C326

50V1

D319

1SS133

+

C325

50V0.47

R935

4.7K

D301

1SS133

D304

1SS133

Q910

2SB1375

Q912

KTC3199

Q911

KTC3199

R925

2.2K

R923

47K

D915

MTZ5.6JAT

C918

0.01

+

C919

10V100

MSIN

FL1

FL2

-35V

SMUTE

SCK

FTU

SPK

PRI

C346

47P

R66 2.2K

R65 1K

D53

1SS133

D326

1N4003

Q915
DTC114ES

SDATA

MPX

RIN

LIN5VA.GND

DSPR

FTU

PERIOD

POUT

FTU

FAUX

P.ON

OSD

OSDATA

SCK

DSPSTB

MIC

OSCS

OSCK

TAPE

-LED

TO DSP PCB

TO DSP PCB

SDATA

DSPL

A.GND

D323

1SS133

+

C302

10V100

R327
120K

C318

0.022

+

C303

16V1000

+

C111

25V10

+

C109

25V10

+

C210

25V10

+

C311 10V100

+

C206

25V10

R220

2.4K

R312 220

R219 3.3K

+

C211

25V10

+

C104 25V10

+

C102

50V1

+

C305

10V100

R322

100K

+

C209

25V10

RF-IN1GND2GND3+B4VT5OSC-OUT6GND7IF-OUT

8

TU1 FM FRONT END

AMRF1AMSENS2FMSENS3AMOSC4OSCAM5VCC6AGC7GND8IFOUT9TUIND10STIND11ROUT

12

FMIFIN

24

MIXOUTAM

23

LPF1

16

VST

22

MPXIN

17

AMIFIN

21

QUAD

20

FMOUT

19

AMOUT

18

LPF2

15

VCO

14

LOUT

13

IC1

TA2057N

XTI1FM2CE3DI4CLOCK5DO6VCOSTOP7AM/FM8LW9MW10SDIN

11

IFIN

12

FMIN

16

XT

22

VCC

17

GND

21

LPFI

20

LPFO

19

PD

18

AMIN

15NC14

IFCNT

13

IC2 LC72136

D1

1SS133

D3

1SS133

D4 1SS133

D2

1SS133

C1

0.1

X1

VCX5044-001

C51
12P

C52
12P

C54
1-TF

C55

0.0039

C56

0.01

C57

0.01

C58

0.001

C60
150P

L51

220uH

R60 1K

R61

1K

R51

1K

R59

1K

R64

100K

R63

47K

R57

330

R54

1.8K

R55 4.7K

R56

2.2K

R52

3.3K

R53

4.7K

R58
10K

+

C53

16V47

+

C59

10V100

Q51
DTA114YS

D51

1SS133

FLAME GND

R2 27

R1 1K

C2 0.1

+

C3

10V100

CF1

VCF2L3B-113

R14 10K

R13 100K

R12 5.6K

R11

10K

R22

3.9K

R23 3.9K

R15

10K

R16 1K

R6

470K

R7

56

R5 330

R8

330

R20 22K

R19 27K

R17

270

+

C18

50V3.3

+

C11
25V10

+

C22

50V0.1

+

C23

50V0.47

+

C14

25V10

+

C12

10V100

C21 0.01

C20

0.033

C10

0.047

C13

0.01

C5 0.01

C25

0.039

C26

0.039

+

C27

50V1

+

C28 50V1

R26

2.2K

R27 2.2K

CF4

CMU2-456A05

C19

0.01

CF3

VQF1Z2Z-115

C16 0.047

C17

68P

C15

150P

Q1

2SC1923(O)

CF2

VCF2L3B-113

R28 1.5K

R9

100K

R10

1K

C8

0.047

C7

10P

C9

0.047

C6 0.001

R25 5.6K

R24

5.6K

L1 F.B

C31

0.01

SCK

SDATA

PERIOD

T2

VQT7A21-111

C30
470P

C29
470P

R251

10K

R151

10K

JA1

ANT-TERMINAL

C62 150P

C63
100P

C34

15P

R70 10K

R18

27K

12345678910111213

CN306

1142153164175678910111213

CN307

TAPE LED

S2

MPX

+

C108

25V10

+

C106

25V10

D6

1SS133

D5

1SS133

R223

4.3K

C4

0.01

D8

1SS133

D7

1SS133

C36

0.001

D313 1SS133

D314 1SS133

R318
120K

R317

220K

123G45

6

7

VCC

8

+

-

+

-

IC305

BA15218N

R124

4.7K

C112
470P

C212
470P

+

C213

25V10

+

C113

25V10

R122

22K

R123

4.3K

R222 22K

R224

4.7K

R120 2.4K

R349

1.5K

D330

MTZ5.1JA

+

C321

10V47

I/O A1O/I A

2

O/I B3I/O B

4

CNT B5CNT C

6

VSS

7

I/O C8O/I C9O/I D10I/O D11CNT D12CNT A13VDD

14

IC304

4066

123G4

567

VCC

8

+

-

+

-

IC303

BA15218N

Y01Y2

2

Y

3

Y34Y1

5

INHI

6

VEE

7

VSS

8

CNT B9CNT A10X311X012X13X114X215VDD

16

IC302 4052

1234567

CN304

1234567

CN303

Q308

DTC114ES

1
2
3

CN301

R117 47K

R118 470

R217

47K

R218

470

Q305
DTC114ES

Q306

DTC114ES

Q304

DTC114ES

Q307

DTC114ES

JA302

L-CH

R-CH

R103 220

R203

220

R101

43K

R205

4.7K

R105

4.7K

R104

2.2K

Q302

DTA114ES

R102 27K

R202

27K

R201

43K

L301

F.B

R306 10K

R307 10K

R309 10K

R308 10K

R310

1K

D310

1SS133

D3111SS133

D309

1SS133

D308

1SS133

D305 1SS133

Q102
2SC3576

Q103
2SC3576

Q203

2SC3576

Q303
DTA114ES

R107

4.7K

R207

4.7K

R303

1.5K

R108

47K

R210

15K

D307 MTZ5.1JA

R302 220

R212

100K

R113

4.7K

R304

1K

R213

4.7K

R112

100K

MCMD

MSTAT

+8V

+8V

M.GND

MRDY

M.GND

OUT.R

A.GND

A.GND

OUT.L

D.GND

D.GND

BU5V

BU5V

TX

MCS

MCLK

MRESET

R942

220

R941

220

R940

220

R939 220

R261

4.7K

R160

27K

R260

27K

R161

4.7K

R351

220

R350 220

R352 220

R353

220

C24

0.01

+

C140 50V3.3

+

C342

6.3V470

1
2

CN311

1
2

CN312

JA304

VIDEO OUT

+

C345

6.3V470

GND

D329

MTZ6.8

D328

MTZ6.8

+

C343

6.3V4700

L305 F.B

IN

1

GND

2

OUT

3

IC901 7805

C927

1-MLC

+

C923

50V2.2

TP-L

TP-GND

TP-R

+

C360

25V10

Q317

DTA114ES

R140

1K

R240

1K

R338

1K UNF.C (1W)

R933

820

+

C909 50V22

R915

330

R934

4.7K

Q318

DTC114TS

R355 22K

D331

1SS133

R67

2.2K

C251

47P

C151

47P

R311 220

R916 330

GND1IN12NF13BVN14BIN15BVO16TIN17TVO18OUT19VCC10SC11PORT112PORT213PORT3

14

BIN2

28

BVO2

27

TIN2

26

TVO225OUT2

24

VC

23

TC

22

BC

21

CLK

20

DATA

19

LATCH

18

VREF

17

PORT415VSS

16

BVN2

29

NF2

30

IN231RIP

32

IC306 BH3854

R262

2.7K

R1622.7K

C64

47PF

R936

3.3 UNF.RES (1/4W)

R927

39 UNF.RES (1/4W)

R901

120 UNF.RES (1/4W)

R245

0.22 UNF.M.F. (1/2W)

R145

0.22 UNF.M.F. (1/2W)

R142

10 UNF.C (1/4W)

R144

10 UNF.C (1/4W)

R244

10 UNF.C (1/4W)

C123

50V2.2(BP)

C223

50V2.2(BP)

D332
1SS133

C37

0.001

C348

0.047

L306

F.B

L307
F.B

+

C336A

25V10

L901 10uH

C930 120P

Main section

HABC DEFG

1

2

3

4

5

2-4

MX-J270V

SHEET 3/8

SHEET 4/8

SHEET 2/8

SHEET 2/8

C713 0.001

R753

2.2K

R804 82K

R744 10K

7G

1

6G

2

5G

3

4G

4

3G

5

2G

6

1G

7

VDD

8

SCKO/SLC-SCK

9

SDATAO/SLC-SDATA

10

FAUX

11

LED-TAPE

12

SLC-STTA

13

MCLK

14

MCMND

15

MSTAT

16

RESET

17

PHOTO A

18

PHOTO B

19

SLC K2

24

SLC K3

23

SAFETY1

22

N.C

21

AVSS

20

XT232XT131AVREF30AVDD29KEY128KEY227KEY326K1

25

VSS33X134X235BEAT36MSI37MPX38+BCTL39MRESET

40

OSCK

41

OSCS

42

OSD

43

DSPSTB

44

OSDATA

45

POUT

46

PEM

47

ICVSS

48

SMUTE

49

MRDY

50

FTU

51

S5

64

S4

63

S3

62

S2

61

S1

60

PERIOD

59

LATCH

58

BACKUP

57

PROTECTOR

56

SPK

55

VOL+

54

VOL-

53

VDD

52

S12

72

VLOAD

71

S1170S10

69

S968S867S766S6

65

S1373S1474S1575S16

76

G1177G10

78

G9798G

80

SLC

IC701

UPD78044FGF-039

1011121314151617181920212223242526272829303132333435363738

39

987654321

3

2

1

CONT. RANDOM

ALL PRGM

CLOCK

AB

REC

TA

NEWS INFO EOS

REC

A.BASS EX S.MODE

R,D,S

SLEEP MONO ST

FL701 QLF0021-001

1
2
3
4
5
6
7
8
9
10
11

CN700

FFC-11P

1
2
3

JS701

QSW0538-001

PERIOD

LATCH

PRI

SPK

FTU

OSCS

MRDY

SMUTE

POUT

DSPSTB

MRESET

OSD

OSCK

OSDATA

MPX

MSIN

FAUX

SAFETY

6V

NC

MCMND

MSTAT

SCK

SDATA

DG

FL1

FL2

-35V

MCLK

L702 47uH

L701

47uH

+

C701

50V22

+

C702

50V22

C703

0.12

L706 10uH

D706
1SS133

+

C735 16V47

R763 1K

R705 2.2K
R791 1K

R707 1K

R708 2.2K
R709 2.2K
R710 2.2K

R755 100K

R729 1K

R727 1K

R701 220

R702 220

R754 4.7K

R764 27K

C719 0.001

+

C718 6.3V100

R756 100K

R712 2.2K
R713 2.2K

R714 2.2K

R786 10K

R762 100K

R757 10K

APHOTO

TKEY3

BPHOTO

NC
TKEY1

DG

SLC-SCK

SW5V

STTA
SLC-SDATA

TKEY2

R766 1K

R767 1K

R715 2.2K

R716 2.2K

R717

2.2K

R718 2.2K

R725 2.2K

R720 2.2K

R719 2.2K

R784 2.2K

R787 10K

R785 10K

L703 10uH

L704 4.7uH

L705

4.7uH

C730 0.001

R800 10K

C737
150P

R738 220K

R740 220K

R742 220K

R739

10K

R741

10K

R743 10K

Q771 KTC3199

Q772 KTC3199

Q773 KTC3199

L708 22uH

R722 220

R728 2.2K

R704 1K
R721 1K
R726 220

R724 220
R723 220

C708 150P

R703 2.2K

R730 10K

R731 1K

R732 2.2K

R733 2.2K

R768

2.2K

R769 2.2K

R736 2.2K

R737 2.2K

R745 47K

R789 10K

R788 2.2K

R700 10K

C714 0.001

CXXX 0.01

C734 0.01

C733 0.01

R758 10K

R761 10K

L709 B.F

X702

M2Z4.19

X701

8.0MHz

R781 8.2K

R780

4.7K

R782 8.2K

R783 4.7K

R778 220K

R779 1M

R777

1K

Q706

2SC2668

Q707
2SC2668

C726

39P

C724 18P

C722 0.001

C727 0.001

C725 22P

C723

39P

C721 22P

C720 22P

D704

1SS133

Q705

2SA1175(E.F)

R774

4.7K

R775 330

R773 10K

R770

22K

R771
22K

R772 10K

Q704

DTC114TS

Q703

KTC3199

+

C717 10V1000

+

C716 50V1

+

C715 16V10

D702 1SS133

D701 1SS133

D703 1SS133

D705

MTZ5.1JA

R776 10K

L707 10uH

R696

5.6K

S707

REPEAT

S708

PAL/NTSC

S706

RANDOM

R695

3.9K

R694

2.7K

R693

2.2K

S704

DISC3

S705

EJECT3

S703

EJECT2

R692

1.5K

R691

1.2K

R690

1K

S701

EJECT1

S702

DISC2

S700

DISC1

S715

SBASS

S713

MPX/V,MASK

S714

SOUND MODE

S712

ECHO

S710

KEY CON[+]

S711

KEY CON[-]

S709

POWER

R798

5.6K

R797

3.9K

R796

2.7K

R795

2.2K

R794

1.5K

R793

1.2K

R792

1K

R751

1K

R747 1K

R750 10K

R752 10K

R748 10K

1
2
3

FW703

1
2
3
4

FW704

FAUX

TAPE

PERIOD

KEY1
KEY_3

6V

KEY_2

FTU

GND

Q474

DTC114ES

C462

0.001

+

C461

16V47

D707

red

D412

green

D413

green

D414

green

D415

green

Q711

DTA114ES

Q470

DTC114ES

Q471

DTC114ES

Q472

DTA114ES

Q473

DTA114ES

R478

18K

R477

10K

S425

REC

S426

CD REC

S424

DUBBING

R476

5.6K

R475

3.9K

R474

7.5K

S422

DECK A/B

S423

REVERSE

S418

STOP/CLR

R473

2K

R494

2.2K

R493

1.5K

S416

TUN+

S417

TUN -

S415

<<

R492

2.2K

R482

47K

S409

TAPE

S408

TUNER

R481

18K

R480

10K

S406

AUX

S407

CD

GND1VCC2OUT

3

IC404

GP1U261X

R486 270

R487 270

R488 120

R489 120

R491

1K

S414

>>

SLC-SCK

SLC-SDATA

FAUX

STTA

MCLK

MSTAT

SAFETY

TKEY3
TKEY2

TKEY1

KEY3

KEY2

KEY1

MSI

MPX

MRESET

9G

10G

11G

PERIOD
LATCH

PRI
SPK

FTU
MRDY

SMUTE

OSDATA

DSPSTB
OSD
OSCS
OSCK

KEY1

KEY2

KEY3

1G2G3G4G5G6G7G8G9G

10G

11G

S16

S15

S14

S13

S12

S11

S10S9S8S7S6S5S4S3S2

S1

FL1

FL1

FL2

FL2

POUT

RA701 220K

RA702 220K

RA703 220K

RA704 220K

RA705 220K

RA706 220K

RA707 220K

RA708 220K

RA709 220K

RA710

220K

RA711 220K

RA712 220K

RA713 220K

RA714 220K

RA715 220K

RA716

220K

RA717 220K

RA718 220K

RA719 220K

RA720 220K

RA721 220K

RA722 220K

RA723 220K

RA724

220K

RA725 220K

RA726 220K

RA727 220K

1

14

2

15

3

16

4

17

5
6
7
8
9
10
11
12
13

CN702

FFC-17P

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

CN701

FFC-13P

Q709

KTC3199

Q708

KTC3199

R809 100K

C739 0.01

R807 390K

R806 390K

R808 100K

C740 0.01

R805 82K

1
2
3

FW702

TAPE LED

KEY PCB

CONTROL PCB

R765 330

TAPE-LED

MCMND

R880 300

R490 4.7K

[AUX]

[TAPE]

[CD]

[TUNER]

1
2
3

FW701

1
2
3

FW701

D708

1SS133

1
2
3

FW702

1
2
3

FW703

1
2
3
4

FW704

KEY3

GND

KEY_2

P-LED

KEY_3

GND

FAUX

TAPE

PERIOD

KEY1
KEY_3

6V

KEY_2

FTU

GND

KEY3

KEY_3
GND

GND

KEY_2

P-LED

1
2
3
4
5

FW705

1
2
3
4
5

FW705

POWER

D709

1SS133

Control section

ABCD E F G

1

2

3

4

5

2-5

MX-J270V

Cassette amplifier & Mechanism control section

TAPE P.B. signal

SHEET 4/8

SHEET 2/8

SHEET 3/8

Note
VDH1033-003PV

HABC DEFG

1

2

3

4

5

2-6

MX-J270V

CD Servo & CD Mechanism control section

CD/AUDIO signal

SHEET 5/8

SHEET 2/8

SHEET 2/8

SHEET 2/8

SHEET 6/8

SHEET 6/8

VIDEO/CD signal

ABCD E F G

1

2

3

4

5

2-7

MX-J270V

SHEET 5/8

SHEET 5/8

SHEET 2/8

Video CD section

SHEET 6/8

VIDEO/CD signal

C110

IC102

C112

IC104

IC111

IC112

IC113

IC114

C126

IC106

IC107

CN101

CN102

CN103

IC101

C142

C106

C105

IC108

IC103

C113

R116

R115

C136

C131

C135

R111 R112

C152

K103

K101

R155

Q141 R156

C159

R148

C143

R147

Q101

C124

R194

R104

X101

TC101

C116C115

R123

R121

R122

R125

R124

R191
R192
R193

L102

R142

D141

C141

R141

R113

IC105

C125

C102

C107

C181

C134

C133

R107

C151

C157

C156

C154

R149

C144

D142

R135

C128

C122

C121

R103

R102

C170

C168

R109

R143

R144

R145

R146

C127

C103

R195

C101

0.1

LH531HEG

0.1

BU1424K

MN171601AK8J2

TC552S7DFLLB5E

HD74MCT244FP

HD74HCT245FP

22/6.3

PD6461GS-E35

PQ20VZ11

CL48D-F1

0.1

0.1

TC7SH04FU

0.1

0

0.0027

0.1

0.1

1.8K 1.1K

22/6.3

270

2SC2412K( R,S)

120

0.001

1.5K0.0018470

DTA114EKA

0.1

75

1M

0.10.1

1K

1K

1K

1K

1K

82
82
82

2.7

5.6K

DTZ4.7( B)

0.0047

75

1K

BU2173F

0.1

0.1

0.1

0.1

0.1

0.1

1.1K

0.1

22/6.3

22/6.3

22/6.3

1.5K

0.0018

1SS355

120

47/4

15P

10K

47K

470P

470P

75

0.1

0.1

0.1

VCLK

VCLK

MA0
MA1
MA2
MA3
MA4

MA5
MA6
MA7
MA8
MA9

MA8
MA9

MA0
MA1
MA2
MA3

MA7

MA8

MA6
MA5
MA4

MD0
MD1
MD2
MD3

MD4
MD5
MD6
MD7

MD15
MD14
MD13
MD12

MD11
MD10

MD9
MD8

MD15
MD12
MD11

MD9

MD8

MD7
MD6
MD5
MD4
MD3

MD14
MD15
MD10

MD0
MD1
MD2

MA0

MA1

MA2

MA3

MA4

MA5

MA6

MA7

MCEO

MD15
MD14
MD13
MD12

MD11
MD10

MD9
MD8

3.3V

D+5V
A+5V

VCC

C.V-OUT

VD23

HSYNC

PAL60%

N/PAL

ENCRST

VSYNC

HSYNC

VD11
VD12
VD13

VSYNC

PIXCLK

VCLK

VB
VG
VR

VBLK

VG

VR

PIXCLK

RESET

VCDEMP

RESET

HREQ
SRCLK
SRDAT

MREQ

HRDY

HA2

HA1

HA0

DS

W/R

ENCRST

N/PAL

HA0
HA1

HA2

ERROR
CDLRC
CDDAT
CDBCK

ERROR

XCLK

CDDAT

CDBCK

CDLRC

SBSY

SFSY

SUBDT

SBSY

SUBDT

SFSY

DALRC3
DADAT3
DABCK3

VCDEMP3

DABCK3

DADAT3

DALRC3

RCLK3

RCLK

RCLK

DADAT

GND

DABCK

DALRC

DADAT

DABCK

DIR

DTACK

DIR

OSC1

VCD/G

PALCDG

DALRC

SD8
SD7
SD6
SD5
SD4
SD3
SD2
SD1 SD8

SD7
SD6
SD5
SD4

SD1
SD2
SD3

SA14
SA12
SA7
SA6
SA5
SA4
SA3
SA2
SA1
SA0

SA14
SA13
SA12
SA11
SA10

SA9
SA8

SR/W

SCS

SA13

SA8
SA9

SA11

SA10

HD7
HD6
HD5
HD4
HD3
HD2
HD1
HD0

HD03

HD23

HD73
HD63
HD53

HD33

HD13

HD43

VDD

XCLK

VCDEMP3

RCLK3

MD0

HSYNC

VSYNC

VD23

VD22

VD21

VD20

VD19

VD16

VD15

VD14

VD13

VD12

VD11

VD7

VD6

VD5

VD4

VD3

VD22

VD21

VD20

VD19

VD16

VD7

VD6

VD5

VD4

VD3

VD15

VD14

MD1

MD2

MD3

MD4

MD5

MD6

MD7

VB

VCD/G

VBLK

MREQ

HRDY

SRCLK

HREQ

DTACK

DS

W/R

HD73

HD63

HD53

HD43

HD33

HD23

HD13

RESET

PAL60

VCD/G

PALCDG

OSC1

SRDAT

SA7

SA6

SA5

SA4

SA3

SA2

SA1

SA0

SR/W

SCS

HD0

HD1

HD2

HD3

HD4

HD5

HD6

HD7

HD03

HABC DEFG

1

2

3

4

5

2-8

MX-J270V

MIC signal

DSP signal
MAIN signal

SHEET 7/8

SHEET 2/8

SHEET 2/8

VDA1

1

MICI

2

LPFO1

3

VAR1

4

AIL

5

LPFO2

6

VAR2

7

AIR

8

LPFO3

9

GNDA1

10

LI

11

LZ12GNDA213AOL14VR215AOR16VDA217RZ18RI19VDX20XI21XO

22

GNDX

23

VDD1

24

CKS

25

MCK2

26

MCK1

27

SDO

28

BCKO

29

LRCKO

30

SDI

31

BCKI

32

LRCKI

33

GND

34

RESET

35

IFD

36

IFS

37

IFL

38

EMP

39

EXTO

40

TEST

41

VDD2

42

VDL

43

GNDL

44

IC601

TC9409BF

1234567

CN601

1234567

CN602

R618 2.2K

R623

100K

R622

100K

R619 2.2K

R617 2.2K

R620 2.2K

R616

2.7

R615 10

R614 10

R612 47K
R613 47K

R603 10K

R604 10K
R605 10K

R609 10K

R611 10K

R610 10K

R606 10K

R608 10K

R607 10K

C610

330P

C605

0.001

C604

0.0047-M

C613

0.0022-M

C607 0.01

C615

330P

C609

0.0022-M

C612 0.01

+

C601 10V100

+

C606 10V47

+

C617

50V1

+

C614 50V1

+

C608 50V1

+

C603 50V1

+

C611 10V100

C602

0.01

+

C616

50V1

+

C619 10V100

C618 0.01

C620

0.01

C621

1-MLC

C624

0.01

C625 5.6P

+

C622
10V100

+

C623

10V100

C626

5.6P

X601

22.5792M

+

C628

10V100

+

C629

6.3V220

C630

0.01

C637 0.01

+

C638 10V100

C633

560P

C634

560P

C631

1-MLC

C632 0.1

D602 1SS133

D603 1SS133

Q602

DTC114ES

Q601 KTA1267

L601
22uH

R624

68

L605 F.B

L603 F.B

FTU

DSPRESET

DSPSTB

SDATA

SCK

D.GND

5V

DSPL

DSPR

LIN

RIN

A.GND

MIC

A.GND

DSPL

DSPR

LIN

MIC

RIN

DSPRESET

SCK

SDATA
DSPSTB

R627 22K

R601 1K

R602 1K

1
2
3

LC601

R621 10

C635 1000P

D601

1SS133

R626 4.7K

R625 10K

L606

F.B

DSP section

ABCD E F G

1

2

3

4

5

2-9

MX-J270V

MIC signal

SHEET 8/8

SHEET 2/8

SHEET 2/8

MIC / headphone section

J851

GNS007-002

J850

VMJ4026-001

1

2

3

FW852

1

2

3

G

4

5

6
7

VCC

8

+

-

+

-

IC852 BA15218F

C853 100P

+

C851 50V2.2

+

C854

50V2.2

+

C855 10V100

+

C856

10V220

R852 4.7K

R856 47K

R855 10K

R853 150K

R859 220

R860 12K

R854 3.9K

R861 10K

C852

100P

R858 2.2K

123

4

FW851
FW-4P-L300

VR851

50K-A

R851 4.7K

L852 47uH

L851 47uH

ROUTSWLOUT

GND

+B 9V

MIC

AG

C857

1000P

C858

1000P

R857

100

HABC DEFG

1

2

3

4

5

2-10

MX-J270V

Main, DSP, video and power board

Printed circuit boards

Main board

Video board

DSP board

Vol. sel. board Power transf. board

ABCD E F G

1

2

3

4

5

2-11

MX-J270V

Display, Multi-control & switch board

Display board

Power switch board

Eject switch board

Multi-control board

Volume board

HABC DEFG

1

2

3

4

5

2-12

MX-J270V

Cassette mechanism amplifier board

MIC / headphone board

MX-J270V

CD Servo control board

5

4

3

2

1

ABC

2-13

MX-J270V

Video CD board

5

4

3

2

1

2-14

ABCD

MX-J270V

CD Tray section switch board

5

4

3

Cam switch board

2

1

ABC

2-15

MX-J270V

-MEMO-

2-16