JVC UX-Z7MD Service Manual

21158200210

UX-Z7MD

SERVICE MANUAL

MICRO COMPONENT MD SYSTEM

UX-Z7MD

TABLE OF CONTENTS

Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Disassembly Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Adjustment method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

No.21158

2002/10

UX-Z7MD

Important Safety Precautions

1.1 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 manufacturers 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 reassembling.

(5) Leakage shock hazard testing)

After reassembling 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 ohm 10W resistor
paralleled by a 0.15 µF AC-type capacitor between an
exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC

SECTION 1

voltmeter.
Move the resistor connection to each exposed metal part,
particularly any exposed metal part having a return path to
the chassis, and measure 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.).

1.2 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 lo-

cal voltage.

1.3 Caution

Burrs formed during molding may be left over on some
parts of the chassis.
Therefore, pay attention to such burrs in the case of pre­forming repair of this system.

1.4 Critical parts for safety

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.
When replacing them, be sure to use the parts of the same type
and rating as specified by the manufacturer. (Except the JC version)

2

1.5 Preventing 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.

1.5.1 Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.
Be careful to use proper grounding in the area where repairs are being performed.

(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) Ground yourself

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

(3) Handling the optical pickup

• 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.)

• 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.

1.6 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 re-

placement 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) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.

1.7 Attention when traverse unit is decomposed

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

• Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit.
(If the flexible wire is disconnected without applying solder, the CDpickup may be destroyed by static electricity.)

• In the assembly, be sure to remove solder from the short land after connecting the flexible wire.

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1.8 Important for laser products

(1) CLASS 1 LASER PRODUCT
(2) DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

(3) CAUTION : There are no serviceable parts inside the

Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.

(4) CAUTION : The compact disc player uses invisible laser

radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are de feated.
It is dangerous to defeat the safety switches.

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 anadjustment or operation check.

ADVARSEL

Usynlig laserstråling ved åbning, når sikkerhedsafbrydere er
ude af funktion. Undgå udsasttelse for stråling.

ADVARSEL

Usynlig laserstråling ved åpning, når sikkerhetsbryteren er
avslott. unngå utsettelse for stråling.

4

SECTION 2

Disassembly Method

2.1 Main body

2.1.1 Removing the metal cover

(See Fig.1 to 3.)

(1) Remove the six screws A on the rear part of the main body

that attach the metal cover.

(2) Remove the two screws B on each side of the main body

that attach the metal cover.

(3) Lift the rear part of the metal cover upward while releasing

the lower sides of the metal cover in the right and left di­rection. The metal cover will be removed.

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Fig.1

Fig.2

Fig.3

5

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

• Prior to this procedure, remove the metal cover.

(1) Remove the card wire from the connector CN302 on amp

board on the left side of the main body.

(2) Remove the three screws C on top of the body that attach

the CD mechanism assembly.

(3) Lift the CD mechanism assembly upward and move it

backward to remove.

(4) Remove the card wire from CN606 on CD servo board, on

the bottom of the CD mechanism assembly.

Fig.4

Fig.5

Fig.6

Fig.7

6

2.1.3 Removing the front panel (See Fig.8 to11.)

• Prior to this procedure, remove the metal cover and the CD

mechanism assembly.
(1) Remove the card wire from the connector CN705 on mi-

con board, in the center of the right side of the main body.

(2) Remove the plastic rivet in the right side of the main body

that attaches tuner board.

(3) Remove the card wire from the connector CN301 on amp

board in the center of the left side of the main body.
Remove the card wire from the connector CN704 on mi­con board.
Remove the wire from each connector CN703 and CN710
respectively.

(4) Remove the card wire from the connector CN452 on FL

connection board on top of the main body.

(5) Remove the two screws D on the right and left sides of the

main body that attach the front panel assembly.

(6) Remove the two screws E on the bottom of the main body

that attach the front panel assembly.

(7) Remove the joint “a” on the bottom of the main body and

the joint “b” on the right and left sides respectively by us­ing a screwdriver. Remove the front panel assembly in the
front direction.

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Fig.10

Fig.8

Fig.9

Fig.11

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2.1.4 Removing the tuner board (See Fig.12.)

• Prior to this procedure, remove the metal cover.

(1) Remove the card wire on the right side of the main body

from the connector CN1 on the tuner board.

(2) Remove the plastic rivet on the right side of the main body

that attaches the tuner board.

(3) Remove the two screws F on the rear side of the main

body that attach the tuner board.

2.1.5 Removing the rear cover (See Fig.13.)

• Prior to this procedure, remove the metal cover and the CD

mechanism assembly.
(1) Remove the two screws F on the rear side of the main

body that attach the rear cover.

Fig.12

2.1.6 Removing the fan (See Fig.14 to 16.)

• Prior to this procedure, remove the metal cover, the CD mech-

anism assembly, and the rear cover.
(1) Remove the wire from the connector CN603 on the MD

connect board in the right side of the main body.

(2) Remove the four screws G on the rear side of the main

body that attach the fan.

(3) Move the fan bracket that attaches the fan from inside the

rear panel upward to remove the two fixing points “c”. Fan
will be detached at the same time.

Notice

When attaching the fan, attach the two “e” to the two “d” re­spectively before pressing the fan with fan bracket.

Fig.13

Fig.15

Fig.14

2.1.7 Removing the rear panel (See Fig.17 to 20.)

8

Fig.16

• Prior to this procedure, remove the metal cover, the CD mech­anism assembly, and the rear cover.
(1) Remove the wire from the connector CN603 on MD con-

nect board on the right side of the main body.

(2) Remove the eight screws H and the two screws I on the

rear side of the main body that attach the rear panel.

(3) Remove the two joint “f” on the right and left bottom of the

rear panel.

Notice

The fan assembly will be kept attached to the rear panel.

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Fig.19

Fig.17

Fig.18

Fig.20

9

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2.1.8 Removing the MD mechanism assembly (See Fig.21 and 22.)

• Prior to this procedure, remove the metal cover, the CD mech-

anism assembly, and the rear cover.
(1) Remove the card wire from the connector CN601 on the

MD connect board in the rear part of the MD mechanism
assembly.

(2) Remove the four screws J on the front side and the rear

side that attach the MD mechanism assembly.
Remove the MD mechanism assembly upward.

Fig.21

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

• Prior to this procedure, remove the metal cover, the CD mech-

anism assembly, and the rear cover.
(1) Remove the wire from the connector CN101 on the amp

board on the left side of the main body.

(2) Remove the band that fixes the wire to the amp board. Re-

move the wire from the two clamps in the bottom chassis.

(3) Remove the screw K on the right side of the main body

that attaches the headphone board.

Fig.22

Fig.23

10

Fig.24

2.1.10 Removing the amp board and heat sink (See Fig.25 and 26.)

• Prior to this procedure, remove the metal cover, the CD mech-

anism assembly, the front panel assembly, and the rear cover.
(1) Remove the wire from the connector CN101 and CN102

on the amp board on the left side of the main body. Re­move the band that fixes the wire. Remove the card wire

from the connector CN303.
(2) Remove the two screws L that attach the amp board.
(3) Pull out and remove the connector CN304 and CN305 on

the amp board outward. Remove the two joint “g” that fix

the bottom chassis.

Notice

The heat sink will be kept attached to the amp board.
The heat sink can be removed without removing the
amp board.

(4) Remove the three screws M that attach the heat sink.

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Fig.25

2.1.11 Removing the MD connect board (See Fig.27.)

• Prior to this procedure, remove the metal cover, the CD mech-

anism assembly, and the rear cover.
(1) Remove the card wire from the connector CN601 on the

MD connect board.

(2) Remove the two screws N on the rear side of the main

body that attach the MD connect board.

(3) Pull out the connector CN604 on the MD connect board in

the rear direction.

Fig.26

Fig.27

11

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2.1.12 Removing the MD base chassis/the micon board (See Fig.28 to 30.)

• Prior to this procedure, remove the metal cover, the CD mech-

anism assembly, the front panel assembly,
the rear cover, the amp board, and the MD connect board.

Notice

The MD base chassis/the micon board can be removed with­out removing the MD mechanism assembly.
(1) Remove the wire from the micon board connector CN707

in the center of the right side of the main
body. Remove the card wire from the connector CN708.

(2) Remove the screw O on top of the main body that attaches

the MD base chassis.

Notice

The MD mechanism assembly will be kept attached to
the MD base chassis.

(3) Remove the two screws P that attach the micon board.

Remove the two joint “h” that fix the MD base chassis.

Fig.28

Fig.29

Fig.30

12

2.1.13 Removing the power trans assembly (See Fig.31 and 32.)

• Prior to this procedure, remove the metal cover, the CD mech-

anism assembly, the front panel assembly, the rear cover, the
amp board, and the MD base chassis.
(1) Move the power cord stopper upward from the rear part of

the main body to remove. Remove the power supply cord
from the connector CN901 on the power trans board.

Notice

The power cord can be removed without removing the
power trans assembly.

(2) Remove the four screws Q on top of the main body that at-

tach the power trans assembly. Remove the wire from the
two clamps on the bottom chassis.

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Fig.32

Fig.31

2.2 Front panel assembly

• Prior to this procedure, remove the metal cover, the CD mech-

anism assembly, and the front panel assembly.

2.2.1 Removing the cassette mechanism assembly (See Fig.33 and 34.)

(1) Remove the spring that is attached to the cassette door

from inside the front panel.

(2) Remove the four screws R that attach the cassette mech-

anism assembly.

Fig.34

Fig.33

13

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2.2.2 Removing the key board (See Fig.35 to 37.)

• Prior to this procedure, remove the cassette mechanism as-

sembly.
(1) Pull out the volume knob in the front side of the front panel

to remove.

(2) Remove the five screws S that attach the bracket (1) from

inside the front panel.

(3) Remove the ten screws T that attach the key board.

Fig.35

14

Fig.36

Fig.37

2.2.3 Removing the FM connection board (See Fig.38 to 40.)

(1) Remove the three screws U and the screw V that attach

the bracket (2) from inside the front panel.

(2) Remove the card wire from the connector CN451 on the

FL connection board.

(3) Press the tab in the front panel and the one in joint “i”

downward to remove. Pull out the FL connection board to
remove.

2.2.4 Removing the drive motor assembly (See Fig.38, 39, and 41.)

(1) Remove the three screws U and the screw V that attach

the bracket (2) from inside the front panel.

(2) Remove the screw W that attaches the drive motor assem-

bly. Remove the tab in joint “j” that fixes the front panel.
Pull out the drive motor assembly to remove.

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Fig.40

Fig.38

Fig.39

Fig.41

15

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2.2.5 Removing the belt/drive motor (See Fig.42.)

• Prior to this procedure, remove the drive motor assembly.

(1) Remove the belt from the pulley.
(2) Remove the two screws X that attach the drive motor.

2.2.6 Removing the switch board (See Fig.43 and 44.)

• Prior to this procedure, remove the bracket (2) / the drive mo-

tor assembly.
(1) Remove the card wire from the connector CN451 on FL

connection board.

(2) Remove the joint “k” by releasing it outward. And then, re-

move the joint “l” in the same way.

(3) Remove the screw Y that attaches the switch board. Re-

move the tab on the joint “m” that fixes the front panel.

Fig.42

Fig.43

Fig.44

16

2.2.7 Removing the FL display (See Fig.45 to 50.)

(1) Remove the four screws Z on the front side of the front

panel that attach the case cover.

(2) Pull out the FL panel from the bosses of the four joint “n”

on the FL display cover.

(3) Remove the four screws A’ that attach the FL display cov-

er. Remove the card wire from the connector CN671 and
CN 672 on the FL connect board inside the FL display cov­er.

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Fig.48

Fig.45

Fig.46

Fig.47

17

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(4) Remove the two screws B’ on the front side of the FL dis-

play cover that attach the FL display.

(5) FL board and lens will be detached from the FL display.

Fig.49

2.2.8 Removing the FL connect board (See Fig.51.)

• Prior to this procedure, remove the FL display cover.

(1) Remove the card wire from the connector CN673 on the

FL connect board.

(2) Remove the two screws C’ that attach the FL connect

board.

Fig.50

Fig.51

18

SECTION 3

Mechanism

3.1 CD Mechanism Assembly

3.1.1 Removing the CL. Base Assembly and Tray (Refer to Figs. 1 to 5.)

(1) Remove the two screws A fastening the CL. base assembly

from the top of the CD mechanism assembly.

(2) Move the CL. base assembly diagonally upwards as

indicated by the arrow to release it from the two hooks a.

(3) Turn the idle gear in the arrow-marked direction from the

upper side of the CD mechanism assembly. Accordingly,
the TRAMECHA assembly moves downwards.

Note:

When drawing out the tray, shift down the TRAMECHA
assembly to the position where the tray does not con­tact the T-T assembly of the TRAMECHA assembly.

(4) Draw out the tray frontwards for removing it.

Note:

When reinstalling the tray:

• Turn the idle gear so that the part b of the tray gear is
positioned in the part c shown in Fig. 4. (Eject posi­tion)

• Engage the right and left hooks d and e of the tray
with the right and left grooves of the TRAMECHA as­sembly respectively for retaining the tray.

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Fig.3

Fig.1

Fig.2

Fig.4

Fig.5

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3.1.2 Removing the TRAMECHA Assembly (Refer to Figs. 6 to 9.)

• Remove the CL. base assembly and tray.

Reference:

The TRAMECHA assembly can be removed without removal
of the mechanism P.C. board.
(1) If the TRAMECHA assembly is lowered and it is located

out of the PLAY position, turn the idle gear in the arrow­marked direction so that the hole in the part f of the tray
gear meets the hole on the CL. base assembly. (Set the
TRAMECHA assembly at the PLAY position.)

(2) Remove the three screws B fastening the

TRAMECHA assembly and then remove the
TRAMECHA assembly upwards from the front side.

(3) At the same time, remove the spring from the groove of

the CH. base assembly in the part g of the TRAMECHA
assembly.

Note:

When reinstalling the TRAMECHA assembly:

• Check to see if the spring is properly engaged with
groove of the CH. base assembly in the part g of the
TRAMECHA assembly.

• After making sure that the three insulators of the
TRAMECHA assembly are properly set on the
bosses of the L. base assembly's guide, fasten
them with the screws.

Fig.6

Fig.7

Fig.8

Fig.9

20

3.1.3 Removing the Mechanism P.C. Board (Refer to Fig 10.)

Reference:

The mechanism P.C. board can be removed without removal
of the TRAMECHA assembly.

Note:

Before disconnecting the flexible wire coming from the pickup
from the connector, be sure to solder its shorting round.
If the flexible wire is connected without soldering, it may cause
breakdown of the pickup.
(1) Solder the shorting round of the flexible wire connected

with the mechanism P.C. board from the back of the
mechanism assembly.

(2) Disconnect the flexible wire from the connector CN601 on

the mechanism P.C. board.

(3) Remove the three screws C fastening the mechanism

P.C. board.

(4) Unsolder the two points of the part h and one point of the

part i of the mechanism P.C. board. Then, remove the
mechanism P.C. board upwards.

Note:

When reinstalling the mechanism P.C. board, connect the flex­ible wire coming from the pickup to the connector first and then
remove the solder from the shorting round of the flexible cable.

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Fig.10

21

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3.1.4 Removing the Pickup(Refer to Figs. 11 to 14.)

• Remove the CL. base assembly and tray.

• Remove the TRAMECHA assembly.

Reference:

The pickup can be removed without removal of the mecha­nism P.C. board.

Note:

Before disconnecting the flexible wire coming from the pickup
from the connector, be sure to solder its shorting round.
If the flexible wire is connected without soldering, it may
cause breakdown of the pickup.
(1) Solder the shorting round of the flexible wire connected

with the mechanism P.C. board from the back of the
TRAMECHA assembly.

(2) Disconnect the flexible wire from the connector CN601 on

the mechanism P.C. board.

(3) Turn the idle gear in the arrow-marked direction from the top

of the TRAMECHA assembly so that the pickup assembly
is shifted to the reverse side of the T-T assembly.
Move the pickup assembly until the part j of the rack plate
in the lower part of the pickup assembly comes out of the
CH. base assembly.

(4) Remove the two screws D retaining the shaft of the pickup

assembly. Next, disengage the hook k from the CH. base
assembly and then remove the pickup assembly together

with the shaft.
(5) Pull the shaft out of the pickup.
(6) Remove the two screws E fastening the rack plate from

the pickup.
(7) Remove the screw F retaining the P.S. spring from the

pickup.

Fig.11

Fig.12

22

Fig.13

Fig.14

3.1.5 Reinstalling the Pickup Assembly (Refer to Figs. 15 and 16.)

Reference:

Refer to the explanation of "Removing the Pickup" on the
preceding page.
(1) Fit the P.S. spring and rack plate to the pickup.
(2) Insert the shaft into the pickup.
(3) Engage the hook k of the pickup assembly with the CH.

base assembly first, and set the part j of the rack plate in
the opening I next. Then, reinstall the pickup assembly
while shifting it to the T-T side (inward) so that the part m
of the rack plate is positioned as shown in Fig. 16.

(4) Move the pickup assembly to the center position and fasten

the shaft with the two screws D. (Make sure that the part n
of the rack plate is correctly engaged with the middle gear.)

(5) After passing the flexible wire coming from the pickup

through the opening of the CH. base assembly, connect it
to the connector CN601.

Note:

When reinstalling the pickup assembly, remove the sol­der from the shorting round after connecting the flexible
wire coming from the pick to the connector CN601.

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3.1.6 Removing the Feed Motor Assembly (Refer to Fig. 17.)

• Remove the CL. base assembly and tray.

• Remove the mechanism P.C. board.

Remove the two screws E fastening the feed motor assembly
from the top of the mechanism assembly.

Fig.17

Fig.15

Fig.16

23

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3.2 MD mechanism assembly

3.2.1 Removing the main board (See Fig.1 and 2)

(1) Turn over the body and disconnect the card wire from con-

nector CN408 and the flexible wire from CN407 on the
main board.

(2) Remove the two screws A attaching the main board. Slide

the main board in the direction of the arrow to release the
two joints a with the single flame.

(3) Solder part b on the pickup in the body. Disconnect the

flexible harness from connector CN321 and CN451 on the
underside of the main board. Then remove the main
board.

3.2.2 Removing the mechanism cover (See Fig.3)

(1) Remove the four screws B on both sides of the body.
(2) Move the mechanism cover toward the front to disengage

the front hook of the mechanism cover from the internal
loading assembly (Joint c). Then remove the mechanism
cover upward.

Fig.3

Fig.1

Fig.2

24

3.2.3 Removing the head lifter (See Fig.4 to 6)

(1) Move the head lifter on top of the body in the direction of the arrow and turn around.
(2) Detach the spring from the hook of the body. Remove the head lifter with the spring.
(3) If necessary, remove the spring from the head lifter.

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3.2.4 Removing the head assembly (See Fig.7)

(1) Remove the screw C on the upper side of the body.

Remove the head assembly while pulling the flexible har­ness from the body.

Fig.4,5,6

Fig.7

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3.2.5 Removing the Loading assembly (See Fig.8 and 9)

Ref:

The loading assembly, the traverse mechanism assembly
and the single flame will be removable after removing the
loading assembly from the body.

• Prior to performing the following procedure, remove the main

board, the mechanism cover, the head lifter and the head as­sembly.
(1) Remove the three screws D on the upper side of the body.
(2) Move the loading assembly forward to disengage it from

the traverse mechanism assembly (Joint d). Then remove
it upward.

(3) Remove the traverse mechanism assembly from the sin-

gle flame.

Fig.8

26

Fig.9

3.2.6 Loading assembly

3.2.6.1 Removing the slide base (L) / (R) (See Fig.10)

(1) Remove the two screws E on the upper side of the loading

assembly.

(2) Remove the slide base (L) outward. (Release it from the

joint bosses E.)

(3) Remove the slide base (R) outward.

3.2.6.2 Removing the loading mechanism assembly (See Fig.11)

(1) Detach the loading mechanism assembly upward to re-

lease the four pins on both sides from the loading motor,
paying attention to the part e of the loading mechanism
base.

UX-Z7MD

Fig.10

3.2.7 Loading mechanism assembly

3.2.7.1 Removing the loading motor (See Fig.12 and 13)

(1) Disconnect the harnesses from the wire holder and from

connector CN612 on the cam switch board.

(2) Remove the screw F attaching the loading motor and re-

lease the joint f.
(3) Remove the belt from the loading motor assembly.
(4) Remove the two screws G attaching the loading motor.

3.2.7.2 Removing the cam gear and the cam switch board (See Fig.12)

(1) Remove the slit washer attaching the cam gear and pull

out the cam gear.

(2) Disconnect the harness from the wire holder and from con-

nector CN612 on the cam switch board.

(3) Remove the two screws H and the clamp. Remove the

cam switch board.

Fig.11

Fig.12

Fig.13

27

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3.2.7.3 Removing the cartridge holder assembly (See Fig.14 and 15)

(1) Remove the two screws I on the upper side of the loading assembly.

3.2.7.4 Removing the slide bar and the eject bar (See Fig.14 and 15)

• Prior to performing the following procedure, remove the car-

tridge holder assembly.
(1) Remove the slide bar upward.
(2) Move the eject bar outward until it stops as shown in

Fig.14. Push the convex part g on the bottom of the body
and remove the eject bar from the chassis.

Fig.14

28

Fig.15

3.2.8 Traverse mechanism assembly

3.2.8.1 Removing the Insulators (See Fig.16)

(1) Disengage the four insulators from the notches of the

traverse mechanism chassis.

3.2.8.2 Removing the pickup unit (See Fig.17)

(1) Turn over the traverse mechanism assembly and remove

the screw J attaching the shaft holder (F).

(2) Move the shaft inward and remove it from the shaft holder

(R).

(3) Detach the shaft side of the pickup unit upward and re-

lease the joint h with the pickup guide. Then remove the
pickup unit with the shaft.

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Fig.16

3.2.8.3 Removing the pickup (See Fig.18)

(1) Draw out the shaft from the pickup.
(2) Remove the two screws K attaching the rack spring.

Fig.17

Fig.18

29

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3.2.8.4 Removing the feed motor assembly (See Fig.15, 20)

• It is not necessary to remove the pickup unit.

(1) For the white and black harnesses extending from the

feed motor assembly, unsolder the soldering i on the
traverse mechanism board.

(2) Remove the two screws L attaching the feed motor as-

sembly.

(3) Remove the two screws N attaching the feed motor brack-

et.

3.2.8.5 Removing the traverse mechanism board (See Fig.19)

• Prior to performing procedure, remove the feed motor assem-

bly.
(1) For the red and black harnesses extending from the spin-

dle motor, unsolder the soldering j on the traverse mecha­nism board.

(2) Remove the screw M attaching the traverse mechanism

board.

Fig.19

Fig.20

30

3.2.9 Reattaching the loading assembly

(1) Reattach the eject bar to the UD base. (Fig.15 and 21)
(2) Reattach the slide bar to the loading mechanism chassis while fitting the boss marked k to the eject bar slot. (Fig.21)
(3) Slide the slide bar and the eject bar in the direction of the arrow in Fig.20 and reattach the cartridge holder assembly using the

two screws I. (Fig.21 and 22)

ATTENTION:

Make sure the pin of the eject lever marked l is fitted to the slot of the eject bar marked m at the bottom of the loading mech­anism chassis after moving the eject lever and the loading slider of the cartridge holder assembly in the direction of the arrow.
(Refer to Fig.22)

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Fig.21

Fig.22

31

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(4) Reattach the wire holder to the UD base while engaging the UD base hook marked u to the wire holder slot marked t (At the

same time, the boss on the reverse side of the wire holder is fitted to the UD base round hole).
(5) Reattach the cam switch board using the two screws H. (Fig.23)
(6) Turn the cam switch to bring the boss to the point marked on the cam switch board. Reattach the cam gear using a slit washer

while fitting the cam gear slot to the cam switch boss. (Fig.23)

ATTENTION:

When reattaching the cam gear, the cam switch boss should be fitted to the cam gear slot, and the triangle mark of the cam
gear should be aligned to the hole of the eject bar as shown in Fig.23.

(7) Reattach the loading motor assembly, using the screw F. Connect the harness extending from the loading motor to connector

CN612 on the switch board and fix it with the wire holder. (Fig.23)

Fig.23

32

(8) Reattach the UD base while engaging the four pins on

both sides of the UD base to the notches of the loading
mechanism base and placing the edge (marked e’) of the
cartridge holder assembly under the hook e of the loading
mechanism base. (Fig.24)

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Fig.26

(10) Reattach the slide base (L) on the slide base (R) while fit-

ting the two pins on another side of the UD base to the
slots of the slide base (L) (Fig.26). Make sure the two slots
of the slide base (L) are fitted to the two bosses marked E’
and tighten the two screws E. (Fig.27)

Fig.24

(9) Reattach the slide base (R) while fitting the two pins on an-

other side of the UD base to the slots of the slide base (R).
(Fig.25)

Fig.25

ATTENTION:

Fit the part v of the slide base (R) to the part w on the
inward side of the cam gear rib. (Fig.26)

Fig.27

Ref:

To expedite the work, bring up the UD base slightly
when fitting each pin to the appropriate notch.

33

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3.3 Cassette mechanism section

3.3.1 Removing the playback / recording & eraser head (See Fig. 1 to 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 direc-

tion, the playback / recording & eraser 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 (outgo-

ing from the playback / recording & eraser head) from the
connector CN31 on the head amplifier & mechanism con-

trol P.C. board.
(4) Remove the flexible P.C. board from the chassis base.
(5) Remove the spring 1 from behind the playback / recording

& eraser head.
(6) Loosen the reversing azimuth screw retaining the play-

back / recording & eraser head.
(7) Take out the playback / recording & eraser head from the

front of the head mount.
(8) The playback / recoring & eraser head should also be re-

moved similarly according to steps 1 to 7 above.

3.3.2 Reassembling the playback / recording & eraser head (See Fig.3)

(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 1 from behind the playback / recording &

eraser head.Attach the flexible P.C. board to the chassis

base, as shown in Fig. 3.
(4) Attach the flexible P.C. board to the chassis base, as

shown in Fig. 3.
(5) The playback / recording & eraser head should also be re-

assembled similarly to step 1 to 4 above.

Fig.1

Fig.2

34

Fig.3

3.3.3 Removing the head amplifier & mechanism control board (See Fig. 4)

(1) Remove the cassette mechanism assembly.
(2) After turning over th cassette mechanism assembly, re-

move the three screws A retaining the head amplifier &
mechanism control board.

(3) Disconnect the connector CN32 on the board including the

connector CN 1 on the reel pulse P.C. board.

(4) When necessary, remove the 4 pin parallel wire soldered

to the main motor.

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3.3.4 Removing the main motor assembly

(1) Remove the two screws B retaining the main motor as-

sembly (See Fig. 4 and 5).

(2) While raising the main motor, remove the capstan belt

from the motor pulley (See Fig. 5).

CAUTION:

Be sure to handle the capstan belt so carefully that this
belt will not be stained by grease and other foreign mat­ter. Moreover, this belt should be hanged while referring
to the capstan belt hanging method in Fig. 5 and 6.

Fig.4

Fig.5

Fig.6

Fig.7

35

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3.3.5 Removing the flywheel (See Fig. 8 and 9)

(1) Remove the head amplifier & mechanism control P.C.

board.
(2) Remove the main motor assembly.
(3) After turning over the cassette mechanism, remove the

two slit washers 1 and fixing the capstan shafts R and L,

and pull out the flywheel R and L respectively from behind

the cassette mechanism.

Fig.8

Fig.9

3.3.6 Removing the reel pulse P.C. board and solenoid (See Fig. 10)

(1) Remove the five pawls a to e reattaining the reel pulse board.
(2) From the surface of the reel pulse board parts, remove the two pawls f and g retaining the solenoid.

Fig.10

36

4.1 MD adjustment(Auto adjust)

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SECTION 4

Adjustment method

37

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38

4.2 Cassette adjustment

4.2.1 Cassette mechanism section 4.2.2 Cassette mechanism section (Back side)

4.2.3 Cassette AMP board

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39

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4.2.4 Tape Recorder Section

Items

Confirmation of
head angle

Confirmation of
tape speed

4.2.5 Reference Values for Confirmation Items

Items

Difference
between the
forward and
reverse speed

Wow & flutter Test tape

Measurement

conditions

Test tape
: VT703L (8kHz)
Measurement output
terminal
: Speaker terminal

Speaker R
(Load resistance: 4 )

: Headphone terminal

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

Measurement

conditions

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

Speaker R

(Load resistance: 4 )
Measurement output
terminal
: Headphone

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

Measurement method Standard Values Adjusting positions

1 Playback the test tape VT703L (8kHz)
2 With the 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 turn.

3 In either case this adjustment should be per-

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

Adjust VR37 so that the frequency counter read­ing becomes 2,940~3,090Hz when playing
back the test tape VT712 (3kHz) with playback
and recording mechanism after ending forward
winding of the tape.

Measurement method Standard Values Adjusting positions

When the test tape VT712 (3kHz) has been
played back with the recording and playback
mechanism at the beginning of forward winding,
the frequency counter reading of the difference
between both of the mechanism should be

6.0Hz or less.

When the test tape VT712 (3kHz) has been
played back with the recording and playback
mechanism at the beginning of forward winding,
the frequency counter reading of wow & flutter
should be 0.25% or less (WRMS).

Maximum output Adjust the head

azimuth screw only
when the head has
been changed.

Tape speed
of deck
: 2,940 ~ 3,090Hz

6.0Hz or less Head azimuth screw

0.25% or less
(WRMS)

VR37

40

4.2.6 Electrical Performance

Items

Adjustment of
recording bias
current
(Reference
Value)

Adjustment of
recording and
playback
frequency
characteristics

4.2.7 Reference Values for Electrical Function Confirmation Items

Items

Recording
bias frequency

Eraser current
(Reference
value)

Measurement

conditions

Mode
: Forward or reverse

mode

• Recording mode

• Test tape
: AC-514 to TYPE and

AC-225 to TYPE
Measurement output
terminal
: Both recording and

headphone terminals

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

Measurement

conditions

Forward or reverse

• Test tape
: TYPE (AC-514)
Measurement terminal
: BIAS TP on P.C. board

Forward or reverse

• Recording mode

• Test tape
: AC-514 to TYPE

and AC-225 to TYPE
Measurement terminal
: Both of the eraser

head terminals

Measurement method Standard Values Adjusting positions

1 With the recording and playback mechanism

load the test tapes(AC-514 to TYPE and
AC-225 to TYPE ), and set the mechanism to
the recording and pausing condition in ad­vance.

2 After connecting 100 in series to the record-

er head measure the bias current with a valve
voltmeter at both of the terminals.

3 After resetting the [PAUSE] mode start record-

ing. At this time adjust VR31 for Lch and VR32
for Rch so that the recording bias current val­ues become 4.0µA (TYPE ) and 4.20µA
(TYPE ).

1 With the recording and playback mechanism

load the test tapes (AC-514 to TYPE ), and
set the mechanism to the recording and paus­ing condition in advance.

2 While repetitively inputting the reference fre-

quency signal of 1kHz and 10kHz from OSC
IN record and playback the rape.

3 While recording and playback the test tape in

TYPE ,adjust VR31 for Lch and VR32 for
Rch so that the output deviation between
1kHz and 10kHz becomes -1dB 2dB.

Measurement method Standard Values Adjusting positions

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

3 Confirm that the BIAS TP frequency on the

P.C. board is 100kHz 6kHz.

1 While recording and playback mechanism,

load the test tapes (AC-514 to TYPE and
AC-225 to TYPE ), and set the mechanism to
the recording and pausing conditions in ad­vance.

2 After setting to the recording conditions, con-

nect 1W in series to the eraser head on con­nect 1W in series to the eraser head on the
recording and playback mechanism side and
measure the eraser current from both of the
eraser terminals.

AC-225
: 4.20µA
AC-514
: 4.0µA

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

100 kHz

6 kHz

TYPE
: 120 mA
TYPE
: 75 mA

UX-Z7MD

VR31

VR31

41

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4.3 Flow of functional operation until TOC read

42

4.4 Maintenance of laser pickup

(1) Cleaning the pick up lens

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

(2) Life of the laser diode

When the life of the laser diode has expired, the following
symptoms will appear.

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

(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.

UX-Z7MD

4.5 Replacement of laser pickup

43

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44

Description of major ICs

5.1 AK4519VF-X (IC480) : A / D D / A converter

• Pin layout

• Block diagram

UX-Z7MD

SECTION 5

• Pin Function

Pin No. Symbol I/O Function

1 VRDA I Voltage Reference Input Pin for DAC, VA
2 VRAD I Voltage Reference Input Pin for ADC, VA
3 AINR I RCH Analog Input Pin
4 VCMR O Rch Common Voltage Output Pin, 0.45xVA
5 VCML O Lch Common Voltage Output Pin, 0.45xVA
6 AINL I Lch Analog Input Pin
7 PWAD I ADC Power-Down Mode Pin "L":Power Down
8 PWDA I DAC Power-Down Mode Pin "L":Power Down

9 MCLK I Master Clock Input Pin
10 LRCK I Input/Output Channel Clock Pin
11 SCLK I Audio Serial Data Clock Pin
12 SDTO O Audio Serial Data Output Pin
13 DGND - Digital Ground Pin
14 VD - Digital Power Supply Pin
15 SDTI I Audio Serial Data Input Pin
16 CMODE I Master Clock Select Pin
17 DEM1 I De-emphasis Frequency Select Pin
18 DEM0 I De-emphasis Frequency Select Pin
19 AOUTL O Lch Analog Output Pin
20 AOUTR O Rch Analog Output Pin
21 VCOM O Common Voltage Output Pin, 0.45xVA
22 AGND - Analog Ground Pin
23 VB - Substrate Pin
24 VA - Analog Power Supply Pin

45

UX-Z7MD

5.2 AN22000A-W (IC601) : RF head amp.

• Pin layout

• Block diagram

• Pin function
Pin

No.

1 APC amp input terminal.
2 APC amp output terminal.
3 Power supply.
4 RF amp negative input terminal.
5 RF amp output terminal.
6 AGC input terminal.
7 AGC loop filter capacitor connection terminal.
8 AGC output terminal.

9 Capacitor connection terminal for HPF-amp.
10 3TENV output terminal.
11 Capacitor connection terminal for RF enberope detection.
12 BDO output terminal.
13 Capacitor connection terminal for RF enverope detection.
14 OFTR output terminal.
15 NRDET output terminal.
16 Ground terminal.

Function

Pin
No.

17 VREF output terminal.
18 VDET output terminal.
19 VDET input terminal.
20 TE amp. output terminal.
21 TE amp. negative input terminal.
22 FE amp. negative input terminal.
23 FE amp. output terminal.
24 GCTL & APC terminal.
25 FBAL control terminal.
26 TBAL control terminal.
27 Tracking signal input terminal 1.
28 Tracking signal input terminal 2.
29 Focus signal input terminal 4.
30 Focus signal input terminal 3.
31 Focus signal input terminal 2.
32 Focus signal input terminal 1.

Function

46

5.3 AN7317 (IC32) : R / P amp.

• Pin layout & block diagram

• Pin functions

Pin No. Function

1 Channel 1 playback amplifier input
2 Channel 1 playback amplifier negative feedback
3 Channel 1 playback amplifier output
4 Channel 1 record amplifier input
5 Channel 1 record amplifier output
6ALC low-cut
7 ALC time
8 Ground

9Vcc
10 Ripple filter
11 Record-Amplifier mute
12 Channel 2 record amplifier output
13 Channel 2 record amplifier input
14 Channel 2 playback amplifier output
15 Channel 2 playback amplifier negative feedback
16 Channel 2 playback amplifier input

UX-Z7MD

5.4 BU4094BCF-X (IC33) : Shift / store registor

• Pin layout • Block diagram

47

UX-Z7MD

5.5 MN662790RSC(IC651):Digital servo & processor

• Pin layout

• Pin function

Pin No. Symbol I/O Description

1 BCLK O Bit clock output for SRDATA
2 LRCK O Identifying signal output of L,R
3 SRDATA O Serial data output
4 DVDD1 - Power supply for digital circuit
5 DVSS1 - Connect to ground for digital circuit
6 TX O Digital audio interface output signal
7 MCLK I Micom command clock signal input
8 MDATA I Micom command data signal input

9 MLD I Micom command load signal input L:load
10 SENSE - Non connect
11 FLOCK - Non connect
12 TLOCK - Non connect
13 BLKCK O Sub code block clock signal (Command execution : CD-TEXT data readout enabling signal

(DQSY) output)
14 SQCK I Export clock signal input for sub code Q resister
15 SUBQ O Sub code Q data output
16 DMUTE I Muting input H:muting
17 STAT O Status signal output
18 LSI_RST I Reset signal input L:reset
19 SMCK O Clock signal output MSEL is H : 8.4672 MHz MSEL is L : 4.2336 MHz
20 CSEL I Oscillation frequency specification terminal H:33.8688 MHz L:16.9344 MHz
21 TEST2 - TEST2 terminal usually : open
22 TVD O Traverse drive output
23 PC - Non connect
24 ECM O Spindle motor drive signal output (Compulsion mode output)
25 ECS O Spindle motor drive signal output (Servo error signal output)
26 VDETMON - Non connect
27 TRD O Tracking drive signal output
28 FOD O Focus drive signal output
29 VREF - Reference voltage for DA output section
30 FBAL O Focus balance adjust signal output
31 TBAL O Tracking balance adjust signal output
32 FE I Focus error signal input (analog input)
33 TE I Tracking error signal input (analog input)
34 RFENV I RF Envelope signal input (analog input)
35 TEST3 I TEST3 Terminal usually : Fixation L
36 OFT I Off track signal input H : off track
37 TRCRS I Track cross signal input (analog input)
38 RFDET I RF detection signal input L : detection
39 BDO I Dropout signal input H : dropout

48

Pin No. Symbol I/O Description

40 LDON I Non connect
41 PLLF2 I/O Terminal for loop filter characteristic switch for PLL
42 DSLBDA - Non connect
43 WVEL - Non connect
44 ARF I RF Signal output
45 IREF I Standard electric current input terminal
46 DRF I Bias terminal for DSL
47 DSLF I/O Loop filter terminal for DSL
48 PLLF I/O Loop filter terminal for PLL
49 VCOF I/O Loop filter terminal for VCO
50 AVDD2 - Power supply terminal for analog circuit
51 AVSS2 - Connect to ground terminal for analog circuit
52 EFM - Non connect
53 DSLB O PLL extraction clock output
54 VCOF2 I/O Loop filter terminal for VCO
55 SUBC O Sub code serial output
56 SBCK I Clock signal input for sub code serial output
57 VSS - Connect to ground terminal for oscillation circuit
58 X1 I Oscillation circuit input terminal f=16.9344 MHz,33.8688 MHz
59 X2 O Oscillation circuit output terminal f=16.9344 MHz,33.8688 MHz
60 VDD - Power supply terminal for oscillation circuit
61 BYTCK - Non connect
62 LDON O Laser ON signal output H : ON
63 GCTRL O General I/O port
64 IPFLA - Non connect
65 FLAG O Flag signal output
66 CLVS - Non connect
67 CRC - Non connect
68 DEMPH O De-emphasis detection signal output
69 RESY - Non connect
70 IOSEL I Mode switch terminal
71 TEST I TEST terminal usually : H
72 AVDD1 - Power supply terminal for analog circuit (for audio output section)
73 OUTL O Lch audio output
74 AVSS1 - Connect to ground terminal for analog circuit (for audio output section)
75 OUTR O Rch audio output
76 DQSY I RF signal polarity specification terminal
77 VCC5V - Power supply terminal (5V)
78 PSEL O IOSEL=H TEST terminal IOSEL=L SRDATA input
79 MSEL O IOSEL=H SMCK terminal output (frequency switch terminal) IOSEL=L LRCK input
80 SSEL O IOSEL=H SUBQ terminal output mode switch terminal IOSEL=L BCLK input

UX-Z7MD

49

UX-Z7MD

5.6 XC62HR3502P-X (IC291) : Regulator

• Pin layout • Block diagram

• Pin function

Pin No. Symbol Function

1 VSS Ground
2 VIN Supply voltage input
3 CE Chip enable
4 NC Non connect
5 VOUT Regulated output voltage

5.7 GM71VS17400CLT5 (IC390,IC790) : DRAM

• Pin layout • Pin function

Pin No. Symbol Function

9~12 A0~A3 Address input

15~19 A4~A8 Addres input

1 Vcc Power supply (+3.3V)
2 I/O1 Date input/output
3 I/O2 Date input/output
4 WE Read/write enable
5 RAS Addres stroke
6 A11 Addres input
7-Not use
8 A10 Address input

13 Vcc Power supply (+3.3V)
14 Vss GND

20 - Not use
21 A9 Address input
22 OE Output enable
23 CAS Calum address stroke
24 I/O3 Date input/output
25 I/O4 Date input/output
26 Vss GND

50

5.8 GP1UM261XK (IC602) : Receiver

• Pin layout

• Block diagram

UX-Z7MD

5.9 M63008FP-X (IC604) : 5ch Actuator driver

• Pin layout

• Block diagram

51

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5.10 BA3126N(IC31) : R/P Switch

5.11 BR93LC66F-X (IC403):EEPROM

• Terminal layout • Pin Functions

Symbol I/O Function

VCC - Power supply

GND - Connect to GND

CS I Chip select input
SK I Serial clock input

DO O

DI I Start bit, OP-code,address, serial data input

Serial data output
Internal state display output of READY/BUSY

5.12 CXA2523AR (IC300) : MD servo

• Block diagram

52

• Pin function
Pin No. Symbol I/O Function

1 I I I-V converted RF signal I input.
2 J I I-V converted RF signal J input.
3 VC O Vcc/2 voltage output.
4 A I A current input for main beam servo signal.
5 B I B current input for main beam servo signal.
6 C I C current input for main beam servo signal.
7 D I D current input for main beam servo signal.
8 E I E current input for side beam servo signal.

9 F I F current input for side beam servo signal.
10 PD I Reflection light quantity monitor signal input.
11 APC O Laser APC output.
12 APCREF I Reference voltage input for the laser power intensity setting.
13 GND - Connect to GND.
14 TEMPI I Connects the temperature sensor.
15 TEMP R I Connects the temperature sensor. outputs the reference voltage.
16 SWDT I Data input for microcomputer serial interface.
17 SCLK I Shift clock input for microcomputer serial interface.
18 XLAT I Latch signal input for microcomputer serial interface.Latched when low.
19 XSTBY I Standby setting pin. Normal operation when high Standby when low.
20 F0CNT I Internal current source setting pin.
21 VREF O Reference voltage output.
22 EQADJ I/O Equalizer center frequency setting pin.
23 3TADJ I/O BPF3T center frequency setting pin.
24 Vcc - Power supply.
25 WBLADJ I/O BPF22 center frequency setting pin.
26 TE O Tracking error signal output.
27 CSLED - Connects the sled error signal LPF capacitor.
28 SE O Sled error signal output.
29 ADFM O ADIP FM signal output.
30 ADIN I ADIP signal comparator input.
31 ADAGC - Connects the ADIPAGC capacitor.
32 ADFG O ADIP2 binary value signal output.
33 AUX O 13 output / temperature signal output. Switched with serial commands.
34 FE O Focus error signal output.
35 ABCD O Reflection light quantity signal output for the main beam servo detector.
36 BOTM O RF/ABCD bottom hold signal output.
37 PEAK O Peak hold signal output for the RF/ABCD signals.
38 RF O RF equalizer output.
39 RFAGC - Connects the RFAGC capacitor.
40 AGCI I RFAGC input.
41 COMPO O User comparator output.
42 COMPP I User comparator non-inverted input.
43 ADDC I/O Connects the capacitor for ADIP amplifier feedback circuit.
44 OPO O User operational amplifier output.
45 OPN I User operational amplifier inverted input.
46 RFO O RF amplifier output. Eye pattern checkpoint.
47 MORFI I Input of the groove RF signal with AC coupling.
48 MORFO O Groove RF signal output.

UX-Z7MD

53

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5.13 LB1641 (IC402) : DC motor driver

• Pin layout • Pin function

IN1 IN2 OUT1 OUT2

5.14 BD7910FV-X (IC450) : Pre driver

• Block diagram

Input Output Mode

0000 Brake
1010 CLOCKWISE
0 1 0 1 COUNTER-CLOCKWISE
1100 Brake

• Pin function

Pin No. Symbol I/O Function

1 Vreg IN I Regulator input and regulator power supply
2 Reg GN - Regulator GND
3 NC - Non connect
4 VG I Voltage input for power MOS drive
5 SVCC O EFM high level output voltage
6 PDGND - Pre-driver GND
7 EFM I EFM signal input
8 MUTE I Mute control (Low active)

9 NC O Non conncet
10 NC O Non connect
11 NC - Non connect
12 VOD2 O Sync.output (Lower power MOS,drain)
13 VSS - Hbridge GND (Lower power MOS,source)
14 VOD1 O Sync.output (Lower power MOS,drain)
15 VOS1 O Source output (Upper power MOS,source)
16 VDD - H bridge power supply terminal(Upper power MOSsource)
17 VOS2 O Source output (Upper power MOSsource)
18 Reg DRV O External PNP drive output for regulator
19 Reg OUT O Reglator output (Emitter follower output)
20 Reg NF - Regulator feedbaack terminal

54

5.15 CXD2662R (IC350) : DSP

• Pin layout

• Block diagram

UX-Z7MD

55

UX-Z7MD

• Pin function (CXD2662R)
Pin No. Symbol I/O Function

1 MNT0 I/O Monitor output.
2 MNT1 O Monitor output.
3 MNT2 O Monitor output.
4 MNT3 O Monitor output.
5 SWDT I Data input for microcomputer serial interface.
6 SCLK I Shift clook input for microcomputer serial interface.
7 XLAT I Latch input for microcomputer serial interface.Latched at the falling edge.
8 SRDT O Data output for microcomputer serial interface.

9 SENS O Outputs the internal status corresponding to the microcomputer serial interface address.
10 XRST I Reset input. Low : reset
11 SQSY O Disc subcode Q sync / ADIP sync output.
12 DQSY O Subcode Q sync output in U-bit CD or MD format when the Digital In source is CD or MD.
13 RECP I Laser power switching input.

High : recording power ; low ; playback power
14 XINT O Interruption request output. Low when the interruption status occurs.
15 TX I Enable signal input for recoding data output. High : enabled
16 OSCI I Crystal oscillation circuit input.
17 OSCO O Crystal oscillation circuit output. (inverted output of the OSCI pin)
18 OSCO I OSCI input frequency switching.

XTSL1(command) = low and XTSL = high : 512Fs (22.5792MHz)

XTSL1(command) = low and XTSL = low : 1024Fs (45.1584MHz)

XTSL1(command) = high : 2048Fs (90.3168MHz)
19 DIN0 I Digital audio interface signal input 1.
20 DIN1 I Digital audio interface signal input 2.
21 DOUT O Digital audio interface signal output.
22 DATAI I Test pin. Connect to GND.
23 LRCKI I Test pin. Connect to GND.
24 XBCKI I Test pin. Connect to GND.
25 ADDT I Data input from A / D converter.
26 DADT O REC monitor output / decoded audio data output.
27 LRCK O LA clock (44.1kHz) output to the external audio block.
28 XBCK O Bit clock (2.8224kHz) output to the external audio block.
29 FS256 O 256Fs output.
30 DVDD - Digital power supply.
31 A03 O External DRAM address output.
32 A02 O External DRAM address output.
33 A01 O External DRAM address output.
34 A00 O External DRAM address output.
35 A10 O External DRAM address output.
36 A04 O External DRAM address output.
37 A05 O External DRAM address output.
38 A06 O External DRAM address output.
39 A07 O External DRAM address output.
40 A08 O External DRAM address output.
41 A11 O External DRAM address output.
42 DVSS - Digital ground.
43 XOE O External DRAM output enable.
44 XCAS O External DRAM CAS output.
45 A09 O External DRAM address output.
46 XRAS O External DRAM RAS output.
47 XWE O External DRAM write enable.
48 D1 I/O External DRAM data bus.

56

Pin No. Symbol I/O Function

49 D0 I/O External DRAM data bus.
50 D2 I/O External DRAM data bus.
51 D3 I/O External DRAM data bus.
52 MDDTI I MD-DATA mode 1 switching input. (Low : normal mode ; high : MD-DATA mode 1)
53 ASYO O Playback EFM full-swing input. (Low : vss ; high : Vdd)
54 ASYI I Playback EFM comparator slice voltage input.
55 AVDD - Analog power supply.
56 BIAS I Playback EFM comparator bias current input.
57 RFI I Playback EFM RE signal input.
58 AVSS - Analog ground.
59 PCO O Phase comparison output for master PLL of playback digital PLL and recording EFM PLL.
60 FILI I Filter input for master PLL of playback digital PLL and recording EFM PLL.
61 FILO O Filter output for master PLL of playback digital PLL and recording EFM PLL.
62 CLTV I Internal VCO control voltage input for master PLL of playback digital EFM PLL and recording EFM PLL.
63 PEAK I Peak hold signal input for quantity of light.
64 BOTM I Bottom hold signal input for quantity of light.
65 ABCD I Signal input for quantity of light.
66 FE I Focus error signal input. Auxillary input 1.
67 AUXI I Auxillary input 1.
68 VC I Center voltage input.
69 ADIO I Monitor output for A / D converter input signal.
70 AVDD - Analog power supply.
71 ADRT I Voltage input for the upper limit of the A / D converter operating range.
72 ADRB I Voltage input for the lower limit of the A / D converter operating range.
73 AVSS - Analog ground.
74 SE I Sled error signal input.
75 TE I Tracking error signal input.
76 DCHG I Connect to he low-inpedance power supply.
77 APC I Error signal input for laser digital APC.
78 ADFG I ADIP binary FM signal (22.05 1kHz) input.
79 F0CNT O CXA2523 current source setting output.
80 XLRF O CXA2523 control latch output. Latched at the falling edge.
81 CKRF O CXA2523 control shift clock output.
82 DTRF O CXA2523 control data output.
83 APCREF O Reference PWM output for laser APC.
84 LDDR O PWM output for laser digital APC.
85 TRDR O Tracking servo drive PWM output. ( )
86 TFDR O Tracking servo drive PWM output. (+)
87 DVDD - Digital power supply.
88 FFDR O Focus servo drive PWM output. (+)
89 FRDR O Focus servo drive PWM output. ( )
90 FS4 O 4Fs output. (176.4kHz)
91 SRDR O Sled servo drive PWM output. ( )
92 SFDR O Sled servo drive PWM output. (+)
93 SPRD O Spindle servo drive output. (PWM ( ) or polarity)
94 SPFD O Spindle servo drive output. (PWM (+) or PWM absolute value)
95 FGIN I Spindle CAV servo FG input.
96 TEST1 I Test pin. Connect to GND.
97 TEST2 I Test pin. Connect to GND.
98 TEST3 I Test pin. Connect to GND.
99 DVSS - Digital ground.

100 EFMO O Low when playback ; EFM (encoded data) output when recording.

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5.16 L4909 (IC910) : Regulator

• Pin layout

• Block diagram

• Pin functions

Pin No. Symbol Function

1 FB1 REG1 feedback voltage input
2 VO1 REG1 output voltage
3 VINA Input DC supply voltage
4 TRIG Trigger for external SCR (crowbar protection)
5 OC Over current warning output
6 EN1 REG1 enable input
7 EN2 REG2 enable input
8 GND Analog ground

9 EN3 REG3 enable input
10 FB3 REG3 feedback voltage input
11 VO3 REG3 output voltage
12 N.C. Not connected
13 VINB Input DC supply voltage
14 VO2 REG2 output voltage
15 FB2 REG2 feedback voltage input

58

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

• Block Diagram

UX-Z7MD

• Pin Function

Pin No. Symbol I/O Function

1 FM IN I This is an input terminal of FM IF signal.
2 AM MIX O This is an out put terminal for AM mixer.
3 FM IF I Bypass of FM IF
4 AM IF I Input of AM IF Signal.
5 GND - This is the device ground terminal.
6
7
8 VCC - This is the power supply terminal.

9 FM DET - FM detect transformer.
10 AM SD - This is a terminal of AM ceramic filter.
11 FM VSM O Adjust FM SD sensitivity.
12 AM VSM O Adjust AM SD sensitivity.
13 MUTE I/O When the signal of IF REQ of IC121(LC72131) appear, the signal of FM/AM IF output. //Muting control

14
15
16 L OUT O Left channel signal output.
17 R OUT O Right channel signal output.
18 L IN I Input terminal of the Left channel post AMP.
19 R IN I Input terminal of the Right channel post AMP.
20 RO O Mpx Right channel signal output.
21 LO O Mpx Left channel signal output.
22 MPX IN I Mpx input terminal
23 FM OUT O FM detection output.
24 AM DET O AM detection output.
25 AM AGC I This is an AGC voltage input terminal for AM
26 AFC - This is an output terminal of voltage for FM-AFC.
27 AM RF I AM RF signal input.
28 REG O Register value between pin 26 and pin28 besides the frequency width of the input signal.
29 AM OSC - This is a terminal of AM Local oscillation circuit.
30 OSC BUFFER O AM Local oscillation Signal output.

TUNED

STEREO

FM/AM

MONO

/ST

O When the set is tunning,this terminal becomes "L".
O Stereo indicator output. Stereo "L", Mono: "H"

input.

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

O Stereo : "H", Mono: "L"

59

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5.18 LA4628 (IC905) : Power amp.

• Pin layout

• Block diagram

5.19 TC7S08F-W (IC340) : Buffer

• Pin layout • Block diagram

60

5.20 LC72136N (IC2) : PLL frequency synthesizer

• Pin layout

• Block diagram

UX-Z7MD

• Pin function

Pin
No.

10 MW I/O Input/output port
11 SDIN I/O Data input/output
12 IFIN I IF counter signal input

Symbol I/O Function

1 XT I X'tal oscillator connect (75kHz)
2FM
3 CE I When data output/input for 4pin(input)

4 DI I Input for receive the serial data from

5 CLOCK I Sync signal input use
6 DO O Data output for Controller Output port
7 FM/ST/VCO O Low: MW mode
8AM
9 LW I/O Input/output port

/AM O LOW:FM mode

and 6pin(output): H

controller

/FM O Open state after the power on reset

Pin
No.

13 IFCONT O IF signal output
14 - Not use
15 AMIN I AM Local OSC signal output
16 FMIN I FM Local OSC signal input
17 VCC - Power suplly(VDD=4.5-5.5V)

18 PD O PLL charge pump output (H: Local

19 LPFIN I Input for active lowpassfilter of PLL
20 LPFOUT O Output for active lowpassfilter of PLL
21 GND - Connected to GND
22 XT

Symbol I/O Function

When power ON:Reset circuit move

OSC frequency Height than Refer­ence frequency.L: Low Agreement:
Height impedance)

I X'tal oscillator(75KHz)

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UX-Z7MD

5.21 LA6541-X (IC801) : Servo driver

• Pin Layout & block diagram

• Pin function

Pin No. Symbol Function

1 Vcc Power supply (Shorted to pin 24)
2 Mute All BTL amplifier outputs ON/OFF
3 Vin1 BTL AMP 1 input pin
4 Vg1 BTL AMP 1 input pin (For gain adjustment)
5 Vo1 BTL AMP 1 input pin (Non inverting side)
6 Vo2 BTL AMP 1 input pin (Inverting side)
7 Vo3 BTL AMP 2 input pin (Inverting side)
8 Vo4 BTL AMP 2 input pin (Non inverting side)

9 Vg2 BTL AMP 2 input pin (For gain adjustment)
10 Vin2 BTL AMP 2 input pin
11 Reg Out External transistor collector (PNP) connection. 5V power supply output
12 Reg In External transistor (PNP) base connection
13 Res Reset output
14 Cd Reset output delay time setting (Capacitor connected externally)
15 Vin3 BTL AMP 3 input pin
16 Vg3 BTL AMP 3 input pin (For gain adjustment)
17 Vo5 BTL AMP 3 output pin (Non inverting side)
18 Vo6 BTL AMP 3 output pin (Inverting side)
19 Vo7 BTL AMP 4 output pin (Inverting side)
20 Vo8 BTL AMP 4 output pin (Non inverting side)
21 Vg4 BTL AMP 4 output pin (For gain adjustment)
22 Vin4 BTL AMP 4 output pin
23 Vref Level shift circuit's reference voltage application
24 Vcc Power supply (Shorted to pin 1)

62

5.22 LA72723(IC3): RDS demodulation

• Pin layout

• Block Diagram

UX-Z7MD

• Pin functions

Pin No. Symbol I/O Function

1 VREF O Reference voltage output (Vdda/2)
2 MPXIN I Baseband (multiplexed) signal input
3 Vdda - Analog power supply (+5V)
4 Vssa - Analog ground
5 FLOUT O Subcarrier input (filter output)
6 CIN I Subcarrier input (comparator input)
7 TEST I Test input
8 XOUT O Crystal oscillator output (4.332MHz)

9 XIN I Crystal oscillator input (exeternal reference input)
10 Vssd - Digtal ground
11 Vddd - Digtal power supply
12 MODE I Read mode setting (0:master, 1:slave)
13 RST I RDS-ID/RAM reset (positive polarity)
14 RDDA O RDS data output
15 RDCL I/O RDS clock output (master mode)/RDS clock input (slave mode)
16 RDS-ID/READY O RDS-ID/READY output (negative polarity)

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5.23 LC75345M-X (IC901) : E.volume

• Pin layout

• Block diagram

64

• Pin function

Pin No. Symbol Function

1 DI Serial data and clock input pin for control.

2 CE Chip enable pin.

3 VSS Ground pin.

4 LOPOUT Output pin of general-purpose operation amplifier.

5 LINM Non-inverted input pin of general-purpuse operation amplifier.

6 LINP Non-inverted input pin of general-purpuse operation amplifier.

7 LOUT ATT + equalizer output pin.

8 LSB Capacitor and resistor connection pin comprising filters for bass and super-bass band.

9 LBASS2 Capacitor and resistor connection pin comprising filters for bass and super-bass band.
10 LBASS1 Capacitor and resistor connection pin comprising filters for bass and super-bass band.
11 LTRE Capacitor and resistor connection pin comprising treble band filter.
12 LVRIN Volume input pin.
13 LSELO Input selector output pin.
14 L5 Input signal pin.
15 L4 Input signal pin.
16 L3 Input signal pin.
17 L2 Input signal pin.
18 L1 Input signal pin.
19 Vref 0.5 x VDD voltage generation block for analog ground.
20 R1 Input signal pin.
21 R2 Input signal pin.
22 R3 Input signal pin.
23 R4 Input signal pin.
24 R5 Input signal pin.
25 RSELO Input selector output pin.
26 RVRIN Volume input pin.
27 RTRE Capacitor connection pin comprising treble band filter.
28 RBASS1 Capacitor and resistor connection pin comprising filter for bass and super-bass band.
29 RBASS2 Capacitor and resistor connection pin comprising filter for bass and super-bass band.
30 RSB Capacitor and resistor connection pin comprising filter for bass and super-bass band.
31 ROUT ATT + equalizer output pin.
32 RINP Non inverted input pin of general-purpose operation amplifier.
33 RINM Non inverted input pin of general purpose operation amplifier.
34 ROPOUT Output pin of general-purpose operation amplifier.
35 VDD Supply pin.
36 CL Serial data and clock input pin for control.

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5.24 XC62ER3602M-X (IC400) : Regulator

• Pin layout

• Block diagram

• Pin function

Pin No. Symbol Function

1V
2V
3V

OUT

GND

SS

Power supply input

IN

Regulator output
4 EXT Base current control terminal
5 CE Chip enable

5.25 TK11140SC-W (IC485) : Regulator

• Pin layout

• Block diagram

66

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67

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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.21158)

Printed in Japan

2002/10