JVC UXM-3-R Service manual

SERVICE MANUAL

MICRO COMPONENT SYSTEM

UX-M3R

Area suffix

B ------------------------------- U.K.
E ----------- Continental Europe
EN ------------ Northern Europe
EV -------------- Eastern Europe

UX-M3R

STANDBY/ON

TUNER

CD/RANDOM TAPE

/BAND

REC

PROGRAM

REMAIN

SLEEP PRE UP

/RDS MODE

REPEAT

INTRO

TIMER

/PRE DOWN

/RDS SEARCH

PRE EQ

DISPLAY

+

/HBS

MODE

VOLUME

MUTING

BEAT CUT

Ð

RM-SUXM3R REMOTE CONTROL

SP-UXM3

Contents

Safety precautions
Preventing static electricity
Important for laser products
Disassembly method
Adjustment method
Flow of functional operation
until TOC read

MICRO COMPONENT SYSTEM UX-M3R

STANDBY

/ON

DISPLAY

MODE

TIMER

ON/OFF

SET

RANDOM

CD

PROGRAM

PRESET

REPEAT

PHONES

REC

STOP/CLEAR PLAY/PAUSE

FULL LOGIC DECK

CD SYNCHRO RECORDING

BAND

TUNER TAPE

SEARCH/TUNING

OPEN

/CLOSE

REMAIN

/RDS MODE

INTRO/RDS
SEARCH

VOLUME

PRE EQ

/HBS

EJECT

CA-UXM3R SP-UXM3

1-2
1-3
1-4
1-5
1-14

Maintenance of laser pickup
Replacement of laser pickup
Trouble shooting
Description of major ICs
Wiring connections

1-17

1-18
1-18
1-19
1-20
1-29

COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.

No.21059

Jan. 2002

UX-M3R

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

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

3. Many electrical and mechanical parts in the products have special safety-related characteristics. These

characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily
be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which
have these special safety characteristics are identified in the Parts List of Service Manual. Electrical
components having such features are identified by shading on the schematics and by ( ) on the Parts List in
the Service Manual. The use of a substitute replacement which does not have the same safety characteristics
as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or
other hazards.

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

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

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

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

0.15 F AC TYPE

1500 10W

Good earth ground

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

Place this
probe on
each exposed
metal part.

!

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

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

3. Repairs 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.

In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the
parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " "
mark nearby are critical for safety.
(This regulation does not correspond to J and C version.)

1-2

UX-M3R

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

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.
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

In order to maintain quality during transport and before installation, both sides of the laser diode on the

1.
replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition.
(Refer to the text.)

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

2.
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.

Remove solder of the short land on the card wire 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 card wire 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.

5. Attention when traverse unit is decomposed

Connector

*Please refer to "Disassembly method" in the text for the CD pickup unit.

Short land

Apply solder to the short land before the card wire is disconnected from
the connector on the CD pickup unit.
(If the card wire is disconnected without applying solder, the CD
pickup may be destroyed by static electricity.)
In the assembly, be sure to remove solder from the short land after
connecting the card wire.

CD pickup unit

1-3

UX-M3R

Important for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

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

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

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

1-4

Disassembly method

<Main body section>

Replacement of the fuses and power amplifier IC

Replacing the fuses (See Fig. 1.)

Remove the left side panel according to its
disassembly method (see Figs. 5 and 6).

Fuses are located inside the left side panel.

[Caution] Be sure to replace the required fuses
with designated ones.

Fuse(F903)

1A 250V

UX-M3R

Fuse(F902)

2A 250V

Power board

Fuse(F901)

1A 250V

Replacing the power amplifier IC on

the main board (See Fig. 2.)

Remove the main board according to its
disassembly method (see Figs. 17 and 18).

1.

Remove the two screws A that attach the power
amplifier IC onto the heat sink.

2.

In order to replace the power amplifier IC, remove
the solder from soldered part a on the back side of
the main board.

Soldered part a

A

Fig.1

Main board

Power amplifier IC

(IC401)

Heat sink

Fig.2

1-5

UX-M3R

Removing the right side panel

(See Figs. 3 and 4.)

1.2.From the right side of the main body, remove the
three screws B and three screws C retaining the
right side panel.

Slide the right side panel toward the rear (in the
direction of arrow 1) until the claw b at the back of
the panel is hooked by the chassis and then lift the
panel upward (in the direction of arrow 2) to
remove it.

B

C

(Long)

Right side
panel

(Long)

C

Removing the left side panel

(See Figs. 5 and 6.)

1.2.From the left side of the main body, remove the
three screws B and three screws C retaining the
left side panel.

Slide the left side panel toward the rear (in the
direction of arrow 3) until the claw c at the back of
the panel is hooked by the chassis, and then lift the
panel upward (in the direction of arrow 4) to
remove it.

Left side
panel

C

(Long)

B

B

Fig.3

2

Right side
panel

1

Claw b

Fig.4

1-6

C

(Long)

B

Fig.5

Left side
panel

4

3

Claw c

Fig.6

UX-M3R

Removing the top cover

(See Figs. 7 and 8.)

Remove the left and right side panels.

1.2.From the back side of the main body, loosen the
two screws D retaining the top cover.

Lift the rear part of the top cover to remove it.

Removing the front panel assembly

(See Figs. 9 to 11.)

Remove the left and right side panels.
Remove the top cover.

1.

Remove the tie band bundling the wires.

2.

Disconnect the wire from the connector CN902 on
the power board.

3.

Disconnect the wire from the connector on the
cassette switch board.

4.

Remove the screw E retaining the bracket on the
ear phone board.

5.

Disconnect the wires from the two connectors
CN201 and CN402 on the main board.

6.

Disconnect the wires from the two connectors
CN607 and CN608 on the CD & MCU board.

7.

Remove the four screws F and the two screws G
retaining the bracket of the CD mechanism
assembly from the left and right.

8.

Remove the screw H retaining the front panel
assembly from the bottom side of the main body.

9.

While opening the hooks d to the left and right of
the lower part of the front panel assembly (in the
direction of arrows 1), slide the front panel
assembly toward the front (in the direction of arrow

2).

Lift the rear
part to remove.

D

CD mechanism
assembly

CN402

F

Fig.7

Fig.8

(To be loosened)

D

Rear panel

CN201

CN608

Top cover

F

G
E

Ear phone
board

Tie band

[Note] After assembly, apply a locking agent to
the screws F and G.

CD mechanism
assembly

F

G

CN607

Connector on the
cassette switch
board

Chassis

Power board

Fig.9

Hook d

Hook d

Fig.11Fig.10

CN902

1

Front panel assembly

2

H

1

1-7

UX-M3R

Removing the CD mechanism

assembly (See Figs. 12 to 14.)

Remove the left and right side panels.
Remove the top cover.
Remove the front panel assembly.

1.

Disconnect the wires from the four connectors
CN601, CN602, CN603 and CN701 on the CD &
MCU board.

2.

From the left side of the main body, remove the tie
band bundling the wires.

3.

Loosen the screw J retaining the main board.

4.

From the left and right sides of the main body,
remove the four screws K retaining the bracket.

5.

Slide the CD mechanism assembly toward the front
and remove it from the studs of the main board.

CD & MCU board

K

CN701

CN603

CD mechanism assembly

CD & MCU board

CN601

CN602

Fig.12

J

Tie band

Fig.13

CD & MCU board

K

Stud

Main board

1-8

Fig.14

UX-M3R

Removing the power board

(See Figs. 15 and 16.)

Remove the left and right side panels.

1.

Disconnect the wire from the connector CN901 on
the power board.

2.

Remove the two screws L retaining the chassis .

3.

Remove the power board by pinching the two studs
retaining the board using radio pliers, etc.

Power transformer

Chassis

Power board

Stud

CN901

L

Fig.15

Stud

Main board

Power board

Radio pliers, etc.

Stud

Removing the main board

(See Figs. 17 and 18.)

Remove the left and right side panels.
Remove the top cover.
Remove the front panel assembly.
Remove the CD mechanism assembly.

1.

Remove the two screws M retaining the speaker
terminal of the main board.

2.

From the top side of the main body, remove the
screw N retaining the heat sink of the main board.

3.

Remove the solder from the soldered part e that
attaches the FM antenna wire to the main board.

4.

Slide the main board toward the front to remove it
from the chassis.

[Note] After assembly, apply a locking agent to
the screw N.

M

Soldered part e

FM antenna wire

N

Chassis

Fig.16

Fig.17

Heat sink

Chassis

Rear panel

Speaker terminal

Main board

Power transformer

Fig.18

1-9

UX-M3R

<Front panel assembly section>

Remove the left and right side panels.
Remove the top cover.
Remove the front panel assembly.

Removing the key board

(See Fig. 19.)

Remove the ten screws P retaining the key board.

Removing the cassette mechanism

assembly (See Fig. 19.)

Remove the two screws Q and the two screws R

1.
retaining the cassette mechanism assembly.

Remove the tie band bundling the REC/PB head

2.
wire.

[Caution] After assembly, apply a locking agent
to the screws Q and R.

Removing the cassette door damper

(See Fig. 19.)

Remove the screw S retaining the damper bracket
and take out the cassette door damper.

Removing the cassette door stopper

(See Fig. 19.)

Remove the two screws T retaining the cassette
door stopper and remove the cassette door
stopper.

Removing the cassette door cover

(See Fig. 20.)

[Note] Use the following procedure to remove
only the cassette door cover.
This procedure does not require the
removal of exterior parts such as the
side panels.

1.2.Open the cassette door.

Slide the cassette door cover in the direction of the
arrow and disengage the two claws f and the two
claws g on the left and right of the cassette door
cover from the cassette door.

Removing the cassette door

(See Figs. 21 and 22.)

Remove the cassette mechanism assembly.
Remove the cassette door cover.

1.

Open the cassette door, disengage the spring
hooked across the front of the front panel assembly
and the cassette door in the outward direction, and
remove it from the claw h.

Front panel assembly

P

Cassette door

sttoper

T

S

Damper bracker

Cassette door
damper

Cassette door

Claw f

Claw g

Cassette door cover

R

Fig.19

Fig.20

Key board

P

Q

Cassette
mechanism
assembly

R

Tie band

REC/PB head wire

Front panel assembly

Spring

Claw h

2.

From the back side of the front panel assembly,
remove the two screws U retaining the bracket.

3.

While pushing the arm section i of the cassette
door in the direction of the arrow, remove the shaft
section j of the cassette door from the front panel
assembly.

4.

While pushing the cassette door arm section k in
the direction of the arrow, remove the shaft section
m of the cassette door from the front panel
assembly.

5.

Take out the cassette door from the back side of
the front panel assembly.

[Caution] In the assembly, be sure to put the
spring around the shaft j before
attaching the cassette door.

1-10

Arm section i

Shaft section j

Spring

Disengage the spring so
that it comes to the front
of the claw h.

Fig.21

Front panel assembly

Arm section k

Shaft section m

Bracket

U

Fig.22

<CD mechanism section>

Remove the left and right side panels.
Remove the top cover.
Remove the front panel assembly.
Remove the CD mechanism assembly.

Removing the CD & MCU board

(See Figs. 23 and 24.)

1.

From the back side of the CD mechanism
assembly, remove the four screws V retaining the
CD & MCU board.

2.

Disengage the two studs retaining the CD & MCU
board.

3.

Disconnect the wires from the two connectors
CN702 and CN703 on the CD & MCU board.

4.

Lift the CD & MCU board and attach solder to the
short land part n on the CD pickup assembly.

Stud

Stud

CD & MCU board

CD & MCU board

Fig.23

CN704

UX-M3R

V

CN702

V

CD pickup unit

5.

Disconnect the card wire from the connector
CN704 on the CD & MCU board, and take out the
CD & MCU board.

[Caution] Be sure to solder the short land
part n on the CD pickup unit before
disconnecting the card wire from the
CD pickup assembly (see Fig. 24).
If the card wire is disconnected
without attaching solder, the CD
pickup may be destroyed by static
electricity.
In the assembly, be sure to remove
solder from the short land part n
after connecting the card wire.

Removing the CD pickup assembly

(See Fig. 25.)

Remove the CD & MCU board.

1.

From the back side of the CD mechanism
assembly, remove the four screws W retaining the
CD pickup assembly.

CN703

CD pickup
assembly

W

CD mechanism assembly

Fig.24

CD pickup assembly

Damper(Gray)

Short land part n

Damper(Blue)

W

2.

Take out the CD pickup assembly.

[Note] When removing or replacing the
dampers, note their colors and be sure
to attach them in their correct positions.

Damper(Blue)Damper(Gray)

Fig.25

1-11

UX-M3R

Removing the tray motor

(See Figs. 26 to 29.)

Remove the CD & MCU board.

1.

On the top of the CD mechanism assembly, open
up the claws p and q at the left and right of the
clamper assembly and lift the assembly to remove
it.

2.

On the top of the CD mechanism assembly, push
the section r of the elevator in the direction of the
arrow and lower the CD pickup assembly.

3.

Pull out the tray.

4.

While opening up the claws s at the left and right of
the tray in the directions of the arrows, remove the
tray.

5.

While pushing the claw t on the CD mechanism
assembly downwards, slide the elevator fully in the
direction of the arrow.

6.

Remove the transparent cover.

CD mechanism assembly

Claw p

Claw q

Fig.26

Clamper assembly

Claw q

Tray

7.

Remove the belt from the tray motor pulley.

8.

Remove the two screws X retaining the tray motor
and remove it.

[Note] Take care not to attach grease on the
belt.
After attaching the tray motor in the
assembly, apply a locking agent to the
screws X.

Fig.27

r section

TrayClaw s

Claw s

Fig.28

CD mechanism assembly

Claw t

Tray motor pulley

1-12

Fig.29

X

Transparent

Belt

cover

UX-M3R

Replacing the CD pickup unit

(See Figs. 30 to 33.)

[Note] Use the following procedure to replace
only the CD pickup unit.

1.

Remove the left and right side panels (see Figs. 3
to 6).

2.

Remove the top cover (see Figs. 7 and 8).

3.

On the top of the main body, open up the claws p
and q on the left and right of the clamper assembly
in the direction of the arrows and lift the assembly
to remove it.

4.

On the top of the main body, push section r on the
elevator of the CD mechanism assembly and lower
the CD pickup assembly.

5.

Pull out the tray.

6.

Remove the slit washer retaining the feed middle
gear, and take out the feed middle gear.

Clamper assembly

Claw g

Claw p

Front panel assembly

Claw g

Fig.30

Front panel assembly

7.

Remove the two screws Y retaining the shaft.

8.

Turn the CD pickup unit upside down and apply
solder to the short land part n.

9.

Disconnect the card wire from the CD pickup unit
and replace the unit.

[Caution] Be sure to solder the short land
part n on the CD pickup unit before
disconnecting the card wire from the
CD pickup unit (see Fig. 33).
If the card wire is disconnected
without attaching solder, the CD
pickup may be destroyed by static
electricity.
In the assembly, be sure to remove
solder from the short land part n
after connecting the card wire.
[Note] Removing the CD pickup unit
involves the removal of the sliding
spring. In the assembly, be sure to
attach the spring in the correct
orientation before attaching the CD
pickup unit (see Fig. 33).

Y

Feed middle gear

Fig.31

CD pickup assembly

Y

Fig.32

Card wire

r section

TraySlit washer

Sliding spring

Short land part n

Fig.33

1-13

UX-M3R

Adjustment method

Measuring instructions required for
adjustment

1. AM signal generator

2. FM signal generator

3. Inter mediate frequency sweep generator

4. FM stereo signal generator

5. Low-frequency oscillator
(oscillation frequency 50Hz-20kHz, 0dB output
with 600 ohm impedance)

6. Attenuator (600 ohm impedance)

7. Electronic voltmeter

8. Distortion meter

9. Torque gauge (cassette for CTG-N)

10. Wow & flutter meter

11. Frequency counter meter

12. Test tape
VT712 : For tape speed and wow flutter
VT724 : For reference level
VT703 : For playback frequency
VT703 : For head azimuth adjustment

13. Blank tape
TAPE : AC-225

Measuring instruments

Radio section
FM 1kHz, 22.5kHz deviation
FM STEREO : 1kHz, 67.5kHz deviation
pilot signal 7.5kHz
AM : 1kHz, 30% modulation
Reference output :
H.phone output -10dBs(0.245V) 32 ohm
Speaker output 0dBs(2.8V) 8 ohm

Cassette amplifier section
Reference output :
H.phone output -10dBs(0.245V) 32 ohm
Speaker output 0dBs(2.8V) 8 ohm
Standard mode of function knob :
Press TAPE knob of select TAPE mode

CD section
CD test disc : CTS-1000

Measurement conditions

Power supply voltage
AC230V/50Hz

1-14

Cassette amplifier section

Item Measuring condition Check and adjustment procedure Standard value Adjusting part
Head azimuth
adjustment

Tape speed and
wow/flutter check
and adjustment

PB frequency
response check

Bias frequency
check

REC and PB
frequency
response
adjustment

Test tape:
VT703 (10kHz)
Signal output terminal:
H.phone out
(with 32 ohm load)

Test tape:
VT712 (3kHz)
Signal output terminal:
H.phone out
(with 32 ohm load)

Test tape: VT703
Signal output terminal:
H.phone out
(with 32 ohm load)
Tape: Normal
Signal output terminal:
Cassette REC./PLAY
HEAD
Test tape: AC225
Signal input:
SG 1kHz -20dBs
with emphasis
Signal output terminal:
H.phone out
(with 32 ohm load)

Play back the test tape VT703 (10kHz).

1.
Adjust the head azimuth adjusting screw so that the

2.
phase difference between the R and L channels is
minimized at an output level that is within 2dB of the
maximum output level. After this adjustment, lock the
head azimuth adjusting screw with screw sealant to
cover more than a half of the screw head.
When the head azimuth is maladjusted, correct it with

3.
the head azimuth adjusting screw.
Play back the test tape VT712 (3kHz) by the end

1.
portion.
Connect a frequency counter and check that it reads

2.
between 2940 and 3090Hz. If not, adjust the frequency
with the motor semifixed resistor.
Check that the wow/flutter is within 0.38%

3.
(unweighted).

Play back the test tape VT703 while con-firming that
deviation between the 1kHz signal and 8kHz signal
should be (0+3dB-6dB).

Set the TUNER or CD function and with TAPE to
record. Check to see if the frequency at the measuring
point P207 is 68kHz 1kHz if not adjust L203 until the
frequency counter indicates 68 kHz 1kHz.
At TUNER, set the BAND to the FM position, and
record the reference 1kHz signal and 8kHz signal
alternately repeatedly. While playing back the recorded
signal of the 1kHz signal differ from that of the 8kHz
signal by within (0+3dB-6dB).

Output level:
Within 2dB of
maximum output
level
Phase difference R
and L channels:
Minimum

2940 to 3090Hz

Within 0.38%
(unweighted)

Deviation between
1kHz and 8kHz:
(0+3dB-6dB)

Level difference for
1kHz singnal: Within
(0+3dB-6dB)

UX-M3R

Head azimuth
adjusting screw
(To be used only
after head
replacement)
See Fig.1 on
page 1-16.

Tape speed:

Motor semifixed
resistor

See Fig.2 on
page 1-16.
Check only

L203, P207
See Fig.3 on
page 1-16.

Tuner section

Item Measuring condition Check and adjustment procedure Standard value Adjusting part

AM IF adjustment 1.

AM tracking
adjustment

FM tracking
adjustment

Signal input:
Loop antenna
Signal output:
IC101 pin19

Signal input:
Loop antenna
Signal output:
H.phone out
(with 32 ohm load)

Signal input:
Dummy antenna
FM ANT
FM GND
Signal output:
H.phone out
(with 32 ohm load)

Set the intermediate frequency sweep generator to AM
450kHz.
Adjust T101 for maximum and center output.

2. T101

Set the TUNER at 522kHz adjust L101 until the test

1.
point P101 voltage at 1.1V 0.1V.
Set the TUNER at 1629kHz, check the test point P101

2.
voltage at 7.0V 0.3V.
Set the TUNER and S/G at 603kHz, adjust L102 for

3.
maximum output.
Set the TUNER and S/G at 1404kHz, adjust the TC102

4.
for maximum output.
Repeat the above steps 3 and 4.

5.

Set the TUNER at 87.5MHz adjust L106 until the test

1.
point P102 voltage at 2.3V 0.1V.
Set the TUNER at 108MHz, check the test point P102

2.
voltage at 6.5V 0.3V.
Set the TUNER and S/G at 90.1MHz, adjust L105 for

3.
maximum output.
Set the TUNER and S/G at 106.1MHz, adjust the

4.
TC101 for maximum output.
Repeat the above steps 3 and 4.

5.

See Fig.3 on
page 1-16.

L101

L102

TC102
See Fig.3 on
page 1-16.

L106

L105

TC101
See Fig.3 on
page 1-16.

1-15

UX-M3R

Location of adjusting parts

Cassette mechanism section

max

Head

Adjustment

CASSETTE MOTOR

-

+

Main board

(AM ANT)

FM ANT

Azimuth adjustment screw

Fig.1 Head output signal

P101

(AM VT)

CN101

L101

(AM OSC)

L105

(FM RF)

P102

(FM VT)

TC101

(FM RF)

Tape Speed Adj.

Fig.2

L106

(FM OSC)

IC101

1-16

TC102

(AM RF)

L102

(AM RF)

Fig.3

TA2104

T101

(AM IF)

(BIAS FREQUENCY)

L203

(BIAS FREQUENCY ADJ.)

P207

Flow of functional operation until TOC read

UX-M3R

Power ON

Slider turns REST
SW ON.

Laser ON

Focus start

FOK

Turn on focus
servo

Confirm that the voltage at the pin5 of CN703 is
"H"/"L"/"H"

Check that the voltage at the pin10(LD) of
CN704 is +1.35V.

Caution

Before connecting a measuring instrument to
the measuring point, turn the power of the
main unit to OFF.
After performing a measurement and before
disconnecting the measuring instrument,
again turn the power of the main unit to OFF.
(If a measuring instrument is disconnected
while an electric current is being output to the
main unit, the pick up of the main unit will be
damaged.)

Disc spinning

Radial_error
scaling

PLL Lock

Turn on radial
servo

Read TOC

Check that the voltage at the pin1 and pin2 of
CN703 is +0.65V.

Confirm the eye-pattern at the "RF" test point.

1-17

UX-M3R

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.

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

Is the level of

RF OUT 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 "Removing the CD pickup" on the previous page)

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

Play a disc.

Check the eye-pattern at the "RF" test point.

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 would be adjusted when the pickup operates normally,the laser pickup may be damaged
due to excessive current.

1-18

Trouble shooting

UX-M3R

Circuit Symptom Cause

No soundGeneral

AM Rotate or resposition the unit.

No sound, weak sound
(Low sensitivity)

Speakers are not connected.

Wrong function is selected.

Defective volume control

Defective earphone jack

Defect in IC601

Defect in IC301

Improper location of unit

Defect in IFT101

Defect AM antenna coil or oscilloscope coil

Intermediate frequency tuning faulty

RF tracking faulty

Defective IC101

Defective IC102

Check the speaker connection.

Set switch to the proper position.

Set the volume control to a proper sound
level.

Replace the earphone jack.

Check voltages. Replace if necessary.

Check voltages. Replace if necessary.

Check resistance, voltage, and current.
Replace as needed.

Replace if necessary.

Readjust (see "Adjustment method").

Readjust (see "Adjustment method").

Check voltages. Replace if necessary.

Check resistance and resolder.

Remedy

Poor contact in antenna circuit

FM Connect the built-in or external antenna.

Tape Clean the capstan or head with alcohol.

CD Insert disc correctly.

No sound, weak sound
(Low sensitivity)

No sound/recording,
unsteady tape sound,
weak sound

Cannot read the table
of content.
No sound

FM antenna not connected

Defective band selector switch

Defective IC101

Defective IC102

Intermediate frequency tuning faulty

Poor contact in FM antenna circuit
Dirty capstan or head

Irregular cassette tape winding

Defective IC202

Cassette erasure prevention tabs broken out

Disc is inserted upside down.

Disc is dirty.

Disc is scratched.

Disc is seriously warped.

Check resistance and resolder.

Replace or repair the switch.

Check voltages. Replace if necessary.

Check voltages. Replace if necessary.

Readjust (see "Adjustment method").

Resolder or repair as required.

Replace tape.

Check voltages. Replace if necessary.

Replace tape or cover tab openings with
adhesive tape.

Wipe clean with a soft cloth.

Use a new disc.

Use a new disc.

A non-standard disc has been inserted.

Moisture has formed inside the CD deck.

Defective IC701

Defective IC704

Defective TA2092N

Defect in the CD pickup mechanism

Use only a brand name disc.

Wait about 20 to 30 minutes.

Check voltages. Replace if necessary.

Check voltages. Replace if necessary.

Check voltages. Replace if necessary.

Replace as required.

1-19

UX-M3R

Description of major ICs

TMP87EP26F (IC601) : MCU

1. Terminal layout

8079787776757473727170696867666564636261605958575655545352

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

1234567891011121314151617181920212223242526272829

2.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

Symbol I/O Function

VSS

XOUT

XIN

RESERT

XTOUT

XTIN

TEST

SHIFT FREQ.

REMOTE

MUTE

PLAY MUTE

REC MUTE

PLAY/REC

(SCK2)

(SI2)

(SO2)

REC SW (RCS)/(WAIT)

REC SW (FWD)

SOL.

MODE SW

VOL STB

POWER

B-HALF SW

JOG-B/VOL DATA

JOG-A/VOL CLK

RDS CLK

V-MOTOR

51

50
49
48
47
46
45
44
43
42

(Top view)

GND (0V)

­Resonator connecting pins for high clock(4-8MHz).

O

For inputting external clock, XIN is used and XOUT is

I

41
40
39
38
37
36
35
34
33
32
31

30

opened.
Reset signal input

I/O

or watchdog timer output/address-trap-reset output
Resonator connecting pins for slow clock(32.768kHz)

O

or general purpose I/O.

I

Test pin for out-going test. Always fixed to low.

I

Shift the crystal oscillation frequency to reduce tuner

O

noise.
Remote control signal input

I

Audio mute output

O

Muting output during play

O

Muting output during recording

O

Play or recording output, low for recording.

O

Not connected

­Not connected

­Not connected

­Deck reverse record protection input. Low means can

I

record on reverse side.
Deck forward record protection input. Low means can

I

record on forward side.
Solenoid output for deck B.

O

Mode switch input of deck B. Low means the head is

I

up.
TC9422F volume STB output

O

Power output control

O

Half switch input of deck B. Low means deck B have

I

tape.
Jog dial input and TC9422F volume data output

I/O

Jog dial input and TC9422F volume clock output

I/O

BU1923F(RDS demodulator) interface CLK input

I

Motor output

O

Pin
No.

28

B-PHOTO OUTPUT

29
30
31
32
33
34
35
36
37

TRAY IN (SLOUT)

38

TRAY OUT (SLIN)
39
40
41
42
43
44
45
46
47
48
49

50
51

52 91
92 95

96
97
98
99

100

Symbol I/O Function

Reel pulse input of deck B. Have pulse input means

I

the tape is rotating.

CD-RW

RES

CCE
BUCK
BUS0
BUS1
BUS2
BUS3

SLT

CLT (SLEND)

NC

RDS DATA

STEREO

PWR DET

AD K3
AD K2
AD K1

VAREF

(BOOT)

CD-RW control output

O

CD servo reset output

O

Servo DSP chip enable output

O

Servo DSP clock output

O

Servo DSP command and data I/O

I/O

Servo DSP command and data I/O

I/O

Servo DSP command and data I/O

I/O

Servo DSP command and data I/O

I/O

Tray open/close outputs for current sensor drawer type

O

mechanism.

O

CD pick up position input: L if pick up is in inner side.

I

Current sensor input

I

Not connected

­BU1923F(RDS demodulator) interface data input

I

Stereo input pin for tuner stereo indication

I

Power down detection

I

Panel key analog input

I

Panel key analog input

I

Panel key analog input

I

Analog reference voltage input

­Control input for writing MCU program area via ICU

I

interface.

VSS
VDD

SEG39 0

COM3 0

VLC

PLL DATA

PLL CLK
PLL PRD

VDD

GND (0V)

­VDD (+5V)

­LCD segment outputs

O

LCD common outputs

O

LCD drive power supply

­TC9257P (PLL) interface

I/O

TC9257P (PLL) interface

O

TC9257P (PLL) interface

O

VDD (+5V)

-

1-20

TC9462F (IC701) : Digital servo single chip processor

1. Terminal layout

80 ~ 51

UX-M3R

100 ~ 81

2. Pin function

1

TEST0

2

HSO

3

UHSO

4

EMPH

5

LRCK

6

VSS1

7

BCK

8

AOUT

9

DOUT

10

MBOV

11

12

13

14
15
16
17
18
19

20
21

22

IPF

SBOK

CLCK

VDD1

VSS2
DATA

SFSY
SBSY
SPCK

SPDA
COFS

MONIT

31 ~ 50

1 ~ 30

Pin No. Function

Test mode terminal. Normally, keep at open

I

Playback speed mode flag output terminal.

O

UHSO HSO PLAYBACK SPEED

O

23
24

H H Normal
H L 2 times
L H 4 times
L L -

Subcode Q data emphasis flag output terminal.

O

25
26
27

28
Emphasis ON at "H" level and OFF at "L" level.
The output polarity can invert by command.
Channel clock output terminal. (44.1kHz)

O

L-ch at "L" level and R-ch at "H" level. The

29

30
output polarity can invert by command.
Digital ground terminal.

­Bit clock output terminal. (1.4112MHz)

O

Audio data output terminal.

O

Digital data output terminal.

O

Buffer memory over signal output terminal.

O

Over at "H" level.
Correction flag output terminal.

O

At "H" level, AOUT output is made to correction
impossibility by C

O

Subcode Q data CRCC check adjusting result

2

correction processing.

output terminal. The adjusting result is OK at
"H" level.

I/O

Subcode P~W data readout clock input/output
terminal. This terminal can select by command
bit.

-

Digital power supply voltage terminal.

-

Digital ground terminal.

O

Subcode P~W data output terminal.

O

Playback frame sync signal output terminal.

O

Subcode block sync signal output terminal.

O

Processor status signal readout clock output

31
32
33
34

35
36
37
38
39
40
41
42
43
44

45
terminal.
Processor status signal output terminal.

O

Correction frame clock output terminal.

O

(7.35kHz)
Internal signal (DSP internal flag and PLL

O

clock) output terminal. Selected by command.
This terminal output the text data with serial

46

47

48

49

50
by command.

Symbol I /OPin No. Symbol I/ O Function

VDD2

TESIO0

P2VREF

HSSW

ZDET

PDO

TMAXS

TMAX

LPFN

LPFO

PVREF

VCOREF

VCOF

AVSS1

SLCO

RFI

AVDD1

RFCT

RFZI

RFRP

FEI

SBAD

TSIN

TEI

TEZI
FOO

TRO

VREF

Digital power supply voltage terminal.

­Test input/output terminal. Normally, keep at

I

"L" level. The terminal that inputted the clock
for read of text data by command.
PLL double reference voltage supply terminal.

­2/4 times speed at "V

O
O

1 bit DA converter zero detect flag output

REF

" voltage.

terminal.
Phase difference signal output terminal of

O

EFM signal and PLCK signal.
TMAX detection result output terminal.

O

Selected by command bit (TMPS).
TMAX detection result output terminal.

O

Selected by command bit (TMPS).
DIFFERENCE RESULT TMAX OUTPUT
Longer than fixed freq. "P2V

REF

"
Shorter than fixed freq. "Vss"
Within the fixed freq. "HiZ"

LPF amplifier inverting input terminal for PLL.

I

LPF amplifier output terminal for PLL.

O

PLL reference voltage supply terminal.

­VCO center frequency reference level terminal.

I

Normally, keep at "PV

O

VCO filter terminal.

-

Analog ground terminal.

O

Data slice level output terminal.

I

RF signal input terminal.

-

Analog power supply voltage terminal.

I

RFRP signal center level input terminal.

I

RFRP zero cross input terminal.

I

RF ripple signal input terminal.

I

Focus error signal input terminal.

I

Sub-beam adder signal input terminal.

I

Test input terminal. Normally, keep at "V

REF

" level.

REF

"

level.

I

Tracking error signal input terminal.
Take in at tracking servo on.

I

Tracking error zero cross input terminal.

O

Focus servo equalizer output terminal.

O

Tracking servo equalizer output terminal.

-

Analog reference voltage supply terminal.

1-21

UX-M3R

51

52
53
54

55

56

57

58

59

60

61

62
63
64
65
66
67

68

69
70

RFGC

TEBC

FMO
FVO

DMO

2VREF

SEL

FLGA

FLGB

FLGC

FLGD

VDD3
VSS3

IO0
IO1
IO2
IO3

DMOUT

CKSE
DACT

71
72

73
74

75

76
77
78

79

80

81
82
83

84
85
86
87
88
89
90
91
92
93
94
95
96
97

98
99

100

Symbol I /OPin No. Symbol I/ O Function

TESIN

TESIO1

VSS4

PXI

PXO

VDD4
XVSS

XI

XO

XVDD

DVSR

RO

DVDD

DVR

LO

DVSL
TEST1
TEST2
TEST3

BUS0
BUS1
BUS2
BUS3
VDD5

VSS5

BUCK

CCE

TEST4

TSMOD

RST

Pin No. Function

RF amplitude adjustment control signal output

O

terminal.
Tracking balance control signal output terminal.

O

Feed equalizer output terminal.

O

Speed error signal or feed search equalizer

O

output terminal.
Disk equalizer output terminal. (PWM carrier=

O

88.2kHz for DSP, Synchronize to PXO)
Analog double reference voltage supply

­terminal.
APC circuit ON/OFF indication signal output

O

terminal. At the laser on time, UHF = L at "HiZ"
level and UHF = H at "H" level.
External flag output terminal for internal

O

signal. Can select signal from TEZC, FOON,
FOK and RFZC by command.
External flag output terminal for internal

O

signal. Can select signal from DFCT, FOON,
FMON and RFZC by command.
External flag output terminal for internal

O

signal. Can select signal from TRON, TRSR,
FOK and SRCH by command.
External flag output terminal for internal

O

signal. Can select signal from TRON, DMON,
HYS and SHC by command.
Digital power supply voltage terminal.

­Digital ground terminal.

­General I/O terminal. Can change over input

I/O

port or output port by command. At the input

I/O

mode time can readout a state of terminal (H/L)

I/O

by read command. At the output mode time can

I/O

control a state of terminal (H/L/HiZ) by
command.
This terminal controls IO0~IO3 terminal.

I

At "L" level time, IO0, 1 out feed equalizer
signal of 2-state PWM, IO2,3 out disk equalizer
signal of 2-state PWM.
Normally, keep at open.

I

DAC test mode terminal. Normally, keep at

I

open.

Test input terminal. Normally, keep at "L" level.

I

Test input/output terminal. Normally, keep at

I

"L" level.
Digital ground terminal.

­Crystal oscillator connecting input terminal for

I

DSP. Normally, keep at "L" level.
Crystal oscillator connecting output terminal

O

for DSP.
Digital power supply voltage terminal.

­Oscillator ground terminal for system clock.

­Crystal oscillator connecting input terminal for

I

system clock.
Crystal oscillator connecting output terminal

O

for system clock.
Oscillator power supply voltage terminal for

­system clock.
Analog ground terminal for DA converter.(R-ch)

­R channel data forward output terminal.

O

Analog supply voltage terminal for DA

­converter.
Reference voltage terminal for DA converter.

­L channel data forward output terminal.

O

Analog ground terminal for DA converter.(L-ch)

­Test mode terminal. Normal, keep at open.

I

Test mode terminal. Normal, keep at open.

I

Test mode terminal. Normal, keep at open.

I

Micon interface data input/output terminal.

I/O
I/O
I/O
I/O

Digital power supply voltage terminal.

­Digital ground terminal.

­Micon interface clock input terminal.

I

Command and data sending/receiving chip

I

enable signal input terminal.
The bus line becomes active at "L" level.
Test mode terminal. Normal, keep at open.

I

Local test mode selection terminal.

I

Reset signal input terminal. Reset at "L" level.

I

1-22

AN7312 (IC202) : Dual recording/Playback pre-amplifier circuit with ALC

1. Terminal layout

14 8

~

UX-M3R

17

~

2. Block diagram

Vcc

14 13 12 11 10 9

Ripple Filter

ALC

1 2 3 4 5 6

GND

Amp.

Ch2

Amp.

Ch1

8

7

3. Pin function

Pin No.

GND

1

ALC time constant

2

ALC input Ch.1

3

Output Ch.1

4

Phase compensation Ch.1

5

N.E.B. Ch.1

6

Input Ch.1

7

Input Ch.2

8

N.E.B. Ch.2

9

Phase compensation Ch.2

10

Output Ch.2

11

ALC input Ch.2

12

Ripple filter

13

Vcc

14

Symbol

I/O

-

GND

-

ALC time constant by resistance and capacitor

I

Right channel ALC input

O

Right channel output

-

No connect

I

Right channel negative feed back input

I

Right channel signal input

I

Left channel signal input

I

Left channel negative feed back input

-

No connect

O

Left channel output

I

Left channel ALC input

-

Ripple filter

-

Power supply

Function

1-23

UX-M3R

BA4558 (IC402) : Dual operational amplifier

1. Terminal layout & Block diagram

1ch 2ch

2

34

EE

5678

+IN2 -IN2 OUT2 Vcc

1

OUT1 -IN1 +IN1 V

BU1923F (IC602) : RDS decoder

1. Terminal layout 2. Block diagram

1

QUAL

RDATA

VREF

MUX
VDD1
VSS1
VSS3

CMP

2
3
4
5
6
7
8

16
15
14
13
12
11
10

9

RCLK
NC
XO
XI
VDD2
VSS2
T1
T2

MUX

VREF

VDD1

VSS1

4

3

5

Power supply

6

2. Pin function

PIN

No.

1
2
3
4
5
6
7
8

100k

120k

100k

Analog

Symbol

OUT1

-IN1
+IN1

V

EE

+IN2

-IN2

OUT2

Vcc

-

+

anti-aliasing

filter

I/O Function

A output

O

A - input

I

A + input

I

V-

-

B + input

I

B - input

I

B output

O

V+

-

VSS3

CMP

7

8

8th Switched
capacitor filter

comparator

16

1

RCLK

QUAL

2. Pin function

PIN

No.

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16

Symbol

QUAL

RDATA

VREF

MUX
VDD1
VSS1
VSS3

CMP

VSS2
VDD2

RCLK

I/O Function

O

Demodulator quality, good data: Hi, bad data: Low

O

Demodulator data

-

Reference voltage, 1/2 V

I

Composite signal input

-

Analog power supply

-

Analog power supply

-

Analog ground

I
T1
T2

XI
XO
NC

Comparator input, C-junction

I

Test input, open or connected to ground

I

Test input, open or connected to ground

-

Digital power supply

-

Digital power supply

I

4.332MHz crystal oscillator input

O

4.332MHz crystal oscillator output

-

Not used

O

1187.5Hz demodulator clock

DD1

LA4282 (IC401) : Power amplifier

1. Terminal layout & Block diagram

30k

300

CH1

Thermal
over voltage

Ripple

filter

1

2

NF1 IN1 RIPPLE

FILTER

34

PRE

GND

300

5

IN2

protector

CH2

30k

Mute

circuit

89

6

7

NF2 OUT2 MUTE POWER

GND2

Vcc

10 12

Vcc11OUT1

POWER

GND1

VDD2

VSS2

12

Power supply

11

Digital

13

Xl

2. Pin function

PIN

No.

1
2
3
4
5
6
7
8

9
10
11
12

PLL
57kHz
RDS/ARI

Reference
clock

14

XO

Symbol

NF1

IN1

RIPPLE FILTER

PRE GND

IN2

NF2

OUT2

MUTE

POWER GND2

Vcc

OUT1

POWER GND1

PLL

1187.5Hz

Bi-phase
decoder

Differential
decoder

Measurement

circuit

10 9

T2

T1

I/O Function

Right channel negative feed back

-

Right channel signal input

I

Ripple filter

-

PRE GND

-

Left channel signal input

I

Left channel negative feed back

-

Left channel output

O

Mute control

-

Power GND

-

Power supply

-

Right channel output

O

Power GND

-

2

RDATA

1-24

TA2109F (IC704) : RF Amplifier

1.Terminal Layout

UX-M3R

2.Block Diagram

1

VCC

2

FNI

3

FPI

4

TPI

5

TNI

6

MDI

7

LDO

8

SEL

9

TEB

10

2VRO

11

TEN

12

TEO

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

+

-

+

­+

­+

PEAK

BOTTOM

-

+

-

+

­+

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

RFN
GND
RFO
AGCI
RFGC
RFGO
RFIS
RFRP
VRO
FEN
FEO
SBAD

SBAD

FEO

FEN

VRO

RFRP

RFIS

RFGO

RFGC

AGCI

RFO

GND

RFN

13

14

-

15

16

17

18

19

20

21

22

23

24

Symbol I/O Function

VCC

FNI
FPI
TPI
TNI

MDI

LDO

SEL

TEB

2VRO

TEN
TEO

SBAD

FEO
FEN
VRO

RFRP

RFIS

RFGO

RFGC

AGCI

RFO

GND

RFN

­I
I
I
I
I

O

I

I

O

I
O
O
O

I
O
O

I
O

I

I
O

-

I

Power supply input terminal
Main beam I-V amplifier input terminal
Main beam I-V amplifier input terminal
Sub beam I-V amplifier input terminal
Sub beam I-V amplifier input terminal
Monitor photo diode amplifier input terminal
Laser diode amplifier output terminal
Laser diode control signal input terminal and APC circuit ON/OFF control
signal input terminal
Tracking error balance adjustment signal input terminal Controlled by
3 PWM signal
Reference voltage (2Vref) output terminal 2Vref=4.2V when Vcc=5V
TE amplifier negative input terminal
TE error signal output terminal
Sub beam adder signal output terminal
Focus error signal output terminal
FE amplifier negative input terminal
Reference voltage (Vref) output terminal Vref=2.1V when Vcc=5V
Track count signal output terminal
RFRP detect circuit input terminal
RF gain signal output terminal
RF amplitude adjustment control signal input terminal
controlled by 3 PWM signal (PWM carrier =88.2 kHz)
RF signal amplitude adjustment amplifier input terminal
RF signal output terminal
Connect to GND
RF amplifier negative input terminal

-

+

3 STATE

DET

SW1 LDC

SW2

+

-

I-I

I-I

­+

­+

+

12

11

10

9

8

7

6

5

4

3

2

1

TEO

TEN

2VRO

TEB

SEL

LDO

MDI

TNI

TPI

FPI

FNI

Vcc

-

-

+

+

-

+

-

­+

­+

1-25

UX-M3R

TA2104AN (IC101) : 1chip AM/FM, MPX tuner system

1. Terminal layout 2. Pin function

PIN

AM

VCC

GND

AGC

1
2
3
4
5
6
7
8

9
10
11
12

RFGND

FMRF IN

MIX OUT

AMIF IN
FMIF IN

QUAD

R OUT

L OUT

3. Block diagram

FM
RF OUTRFVCCAMRF INFMOSCAMOSC

2324 2122 1920 1718 1516 1314

FMRF

24

FMRF OUT

23

RF VCC

22

AMRF IN

21

FM OSC

20

AM OSC

19

OSC OUT

18

ST LED

17

IF REQ

16

DET OUT

15

MPX IN

14

LPF1

13

LPF2

OSC

AM

MIX

Symbol

No.

1

RFGND

2

FMRF IN
3
4

MIX OUT
5
6

AMIF IN

7

FMIF IN
8
9

10
11
12

OSC
OUTSTLEDIFREQ

AM

OSC

FM

FMRF

FMRF

FM

MIX

ST

LEVEL

DET

AMIF FMIF

1/8

BUFF

SW

IF

AM

VCC

GND

AGC

QUAD
R OUT
L OUT

IF

REQ

AM

DETFMDET

I/O

Ground terminal for RF

­Input of FMRF signal

I

AM low frequency cut

I

Output of FM/AM RF mix

O

Power supply terminal

­Input of AMIF signal

I

Input of FMIF signal

I

Ground terminal

­AGC voltage input terminal

I

OSC terminal for FM DET.

I

Output R-channel

O

Output L-channel

O

DET

MIX

AF

IN

LPF1 LPF2

DIVIDE

ST/MO
FM/AM

OUT

AF

BUFF

AGC

Function

VCD

DECODE

MUTE

PIN

Symbol I/O Function

No.

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

FMRF OUT

LPF2
LPF1

MPX IN

DET OUT

IF REQ
ST LED

OSC OUT

AM OSC
FM OSC
AMRF IN

RF VCC

FM/AM switch

I

Stereo/monoral switch

I

Multiplex signal input

I

AM/FM detection output

O

IF out/REQ out

O

Stereo indicator output

O

PLL data bus for FM or AM

O

AM local oscillation circuit

­FM local oscillation circuit

­Input of AMRF signal

I

Power supply terminal for RF

­Output of FMRF signal

O

21 43 65 87 109 1211

RF
GNDFMRF IN

AM MIX

OUT

VCC AM

IF INFMIF IN

GND AGC R-OUT L-OUTQUAD

TC9257F (IC102) : PLL frequency synthesizer

1. Terminal layout

XT
XT

PRD

CLK

DATA

N.C

TUNER

CD

AUX

ST MONO

3. Block diagram

FM OSC

AM OSC

1-26

DATA

CLK

PRD

1
2
3
4
5
6
7
8
9

10

14

13

XT

2

XT

1

5

4

3

AMP

20
19
18
17
16
15
14
13
12
11

FM

L

1/2

FMHHF

OSC

CIRCUIT

FM VT
AM VT
B1
B0
IF
GND
FM OSC
AM OSC
VDD
EE

2 MODULUS
PRESCALER

FM MODE LF

OSC

1ms

ADDRESS
DECODER

OUTPUT PORT

N.C

TUNER

2. Pin function

PIN
No.

10

PSC

4bit SWALLOW

COUNTER

12bit PROGRAMMABLE COUNTER

4

REFERENCE COUNTER

24bit REGISTER

24bit SHIFT REGISTER

4

TEST

24bit REGISTER

4 4

CD

AUX

20bit BINARY COUNTER

UNIVERSAL COUNTER CONTROL

OT-4

9876

Symbol

1
2
3
4
5
6
7

TUNER
8
9

ST MONO

24 22

XT

XT
XT

PRD

CLK

DATA

N.C

CD

AUX

12

15

10

1ms

VDD

POWER ON

RESET

MAX

5

I/O

Crystal oscillator pins

I

Crystal oscillator pins

O

Period signal input

I

Clock signal input

I

Serial data input/output

I/O

General-purpose output port

O

General-purpose output port

O

General-purpose output port

O

General-purpose output port

O

General-purpose I/O port

I/O

12

RESET

PHASE

4

UNLOCK

Function Function

GND

15

TRI-STATE

BUFFER

TRI-STATE

BUFFER

COMPARATOR

OT4

5

I/O PORT

AMP

AMP

GATE

19

20

10

11

16

17

18

AM VT

FM VT

ST MONO

EE

IF

B0

B1

PIN

No.

11
12
13
14
15
16
17
18
19
20

Symbol I/O

EE

I/O

VDD
AM OSC
FM OSC

GND

IF

I/O

B0

I/O

B1

I/O

AM VT
FM VT

O
O

General-purpose I/O port
Power supply pin

-

Programmable counter input

I

Programmable counter input

I

Ground pin

-

General-purpose I/O port
General-purpose I/O port
General-purpose I/O port
Phase comparator output
Phase comparator output

TC9422F (IC301) : System electronic volume

1.Terminal Layout 2.Block Diagram

INPUT SELECTOR

2

GND
L-IN1
L-IN2
L-IN3
L-IN4

L SW-OUT

L VR-IN

L-B1
L-B2
L-B3

L TONE-OUT

L-T1

Vref

CK

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

1
2
3
4
5
6
7
8

9
10
11
12
13
14

VDD

28

R-IN1

27

R-IN2

26

R-IN3

25

R-IN4

24

R SW-OUT

23

R VR-IN

22

R-B1

21

R-B2

20

R-B3

19

R TONE-OUT

18

R-T1

17

STB

16

DATA

15

Symbol I/O Function

GND
L-IN1
L-IN2
L-IN3
L-IN4

L SW-OUT

L VR-IN

L-B1
L-B2
L-B3

L TONE-OUT

L-T1

Vref

CK

DATA

STB

R-T1

R TONE-OUT

R-B3

R-B2

R-B1

R VR-IN

R SW-OUT

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

VDD

­I
I
I
I

O

I
I
I
I

O

I
I
I
I
I
I

O

I
I
I
I

O

I
I
I
I

-

L-IN1

3

L-IN2

L-IN3

4

L-IN4

5

L VR-IN

L-B1

L-B2

L-B3

L-T1

6

7

8

9

1k

10

CAPACITOR FOR

OSCILLATION

11

500

12

750

MAIN VR
50k /64STEP

13k

L SW-OUT

L TONE-OUT

Ground pin
Audio signal input pin (L-ch)
Audio signal input pin (L-ch)
Audio signal input pin (L-ch)
Audio signal input pin (L-ch)
Audio signal output pin (L-ch)
Main volume input pin (L-ch)
Tone control tap pin 1 for bus
Tone control tap pin 2 for bus
Tone control tap pin 3 for bus
Tone control output pin (L-ch)
Tone control tap pin for treble (L-ch)
Reference voltage input pin
Clock input pin
Data input pin
Strobe input pin
Tone control tap pin for treble (R-ch)
Tone control output pin (R-ch)
Tone control tap pin 3 for bus
Tone control tap pin 2 for bus
Tone control tap pin 1 for bus
Main volume input pin (R-ch)
Audio signal output pin (R-ch)
Audio signal input pin (R-ch)
Audio signal input pin (R-ch)
Audio signal input pin (R-ch)
Audio signal input pin (R-ch)
Power supply voltage pin

GND VDD

100k

GAIN CONTROL

0,6,12,18dB

LATCH

DECODER

CIRCUIT

50k

13k

BASS VR
50k /16STEP

TREBLE VR
50k /16STEP

32BIT SR

50k

50k

Vref CK DATA STB

281

GAIN CONTROL

0,6,12,18dB

BASS VR
50k /16STEP

TREBLE VR
50k /16STEP

1613 14 15

INPUT SELECTOR

100k

MAIN VR
50k /64STEP

50k

CAPACITOR FOR

OSCILLATION

13k

13k

500

750

27

26

25

24

23

22

21

20

1k

19

18

17

UX-M3R

R-IN1

R-IN2

R-IN3

R-IN4

R SW-OUT

R VR-IN

R-B1

R-B2

R-B3

R Tone-OUT

R-T1

1-27

UX-M3R

TA2092N (IC703) : Power driver IC

1.Terminal Layout & Block Diagram

PW GND1

OUT(-)1

PW VCC1

OUT(+)1

VIN1

VRI

VCI

VIN2

OUT(+)2

PW VCC2

OUT(-)2

PW GND2

1

2

3

4

5

6

7

8

9

10

11

12

24

23

22

21

20

19

18

17

16

15

14

13

PW GND4

OUT(-)4

PW VCC4

OUT(+)4

VIN4

SVCC1

SGND

VIN3

OUT(+)3

PW VCC3

OUT(-)3

PW GND3

2.Pin Function

Pin No. Symbol I/O Function

1

PW GND1

2

OUT(-)1

3

PW VCC1

4

OUT(+)1

5

VIN1

6

VRI

7

VCI

8

VIN2

9

OUT(+)2

10

PW VCC2

11

OUT(-)2

12

PW GND2

13

PW GND3

14

OUT(-)3

15

PW VCC3

16

OUT(+)3
17
18
19
20
21
22
23
24

VIN3

SGND

SVCC1

VIN4

OUT(+)4

PW VCC4

OUT(-)4

PW GND4

Power GND

­Inverted output for CH1

O

Supply terminal of output stage for CH1

­Non-inverted output for CH1

O

Input for CH1

I

Input reference voltage

­Output reference voltage

­Input for CH2

I

Non-inverted output for CH2

O

Supply terminal of output stage for CH2

­Inverted output for CH2

O

Power GND

­Power GND

­Inverted output for CH3

O

Supply terminal of output stage for CH3

­Non-inverted output for CH3

O

Input for CH3

I

Supply terminal of small signal GND

­Small signal GND

­Input for CH4

I

Non-inverted output for CH4

O

Supply terminal of output stage for CH4

­Inverted output for CH4

O

Power GND

-

TA7291S (IC702) : Bridge driver

1.Terminal Layout

123456789

IN2 VCC OUT2 NC GND VS OUT1 VREF IN1

2.Truth table

INPUT OUTPUT

IN1

0

1

0

1

UPC1330(IC201): REC/PB audio head switch

1. Terminal layout

19

3. Pin function

Pin No.

1
2
3
4
5
6
7
8
9

Symbol

SW

R1

GND

P1

SW
CONT
GND
Vcc

P2

SW
GND

R2

SW

I/O

Record SW (Left channel)

-

-

GND
Play SW (Left channel)

­Record/play control pin

-

-

GND

-

Power supply

-

Play SW (Right channel)

-

GND

-

Record SW (Right channel)

2. Block diagram

123456 789

Function

IN2

L

CW/CCW

CCW/CW

L

INVERTER

MODE

STOP

BRAKE

OUT1

OUT2

0

0

1

1

H

L

L

H

COMPARATOR

1-28

Wiring connections

UX-M3R

CN402

CN201

Main board

Ear phone board

Motor board

JP401

JP803

CN607

88

CD & MCU board

Back LED board

Key board

CN902

Transformer

Power board

CN901

1-29

UX-M3R

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.21059

200201(SV)