JVC UX-Z7MDR Service Manual

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Page 1

22042200302

UX-Z7MDR

SERVICE MANUAL

MICRO COMPONENT MD SYSTEM

UX-Z7MDR

Area Suffix

E -------- Continental Europe

TABLE OF CONTENTS

1 Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

2 Disassembly Method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

3 Adjustment method. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37

4 Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-44

No.22042

2003/02

Page 2

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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

SECTION 1

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 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 local

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)

1-2 (No.22042)

Page 3

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.

UX-Z7MDR

(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 replace-

ment 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.

Main board

Flexible wire

Shorting round

Pickup Solder part b

CN601 on mechanism P.C. board

(No.22042)1-3

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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.

REPRODUCTION AND POSITION OF LABELS

(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.

WARNING LABEL

CLASS 1 LASER PRODUCT

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

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

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

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

1-4 (No.22042)

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SECTION 2

Disassembly Method

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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.

Matal cover

Fig.1

Matal cove

Fig.2

Matal cover

Fig.3

(No.22042)1-5

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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.

Amp board

CN302

CD mechanism ass'y

Fig.4

CD mechanism ass'y

Amp board

CN302

Fig.5

Fig.6

CD servo board

CN606

1-6 (No.22042)

Fig.7

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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 micon

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.

Plastic rivet

Front panel ass'y

Tuner board

FL connect board

CN710

CN452

CN703

Fig.10

Front panel ass'

Micon board

CN704

Front panel ass'

Micon board

CN705

Amp board

CN301

CN710

joint b

Fig.8

Front panel ass'y

joint b

Fig.9

oint a

Fig.11

Micon board

CN704

CN703

(No.22042)1-7

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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 G on the rear side of the main

body that attach the rear cover.

CN1

Plastic rivet

Tuner doard

Fig.12

Rear panel

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 H 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.

Fan

Rear panel

oint c

hook d

Rear cover

Fan blacket

Fan

Fig.13

Rear panel

Fig.15

Fan

joint

hole e

MD connect board

1-8 (No.22042)

CN603

Fig.14

hook d

hole e

Fig.16

Page 9

2.1.7 Removing the rear panel

(See Fig.17 to 20.)

• 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 MD con-

nect board on the right side of the main body.

(2) Remove the eight screws F 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.

Rear panel

UX-Z7MDR

Rear panel

joint f

Fig.19

MD connect doard

CN603

Rear panel

Fig.17

Fig.18

Rear panel

Fig.20

joint f

(No.22042)1-9

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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 H on the front side and the rear

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

MD connect board

MD mechanism ass'y

CN601

MD mechanism ass'

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 I on the right side of the main body that

attaches the headphone board.

Fig.22

Band

Headphone board

mp board

CN101

clamp

Fig.23

1-10 (No.22042)

Headphone board

Fig.24

Page 11

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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 J 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 K that attach the heat sink.

mp board

Heat sink

joint g

CN303

Fig.25

CN304

joint g

CN305

Band

CN102

CN101

Amp board

Fig.26

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 L 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.

MD connect board

CN601

Fig.27

CN604

(No.22042)1-11

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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 M 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 N that attach the micon board. Re-

move the two joint "h" that fix the MD base chassis.

MD mechanism ass'y

Micon board

CN707

MD mechanism ass'y

MD base chassis

CN708

Fig.28

MD base chassi

Fig.29

joint h

Fig.30

Micon board

1-12 (No.22042)

Page 13

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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 O on top of the main body that at-

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

Power trans assembly

Bottom chassis

clamp

Power trans

assembly

Fig.32

Power trans board

CN901

Power cord

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 P that attach the cassette mecha-

nism assembly.

Cassette mechanism assembl

cord stopper

Fig.31

Cassette door

Spring

Fig.34

Spring

Fig.33

(No.22042)1-13

Page 14

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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 Q that attach the bracket (1) from

inside the front panel.

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

Front panel assembly

Bracket(1)

Volume knob

Fig.35

Front panel

Fig.36

Key boad

1-14 (No.22042)

Fig.37

Page 15

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2.2.3 Removing the FM connection board

(See Fig.38 to 40.)

(1) Remove the three screws S and the screw T 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 S and the screw T that attach the

bracket (2) from inside the front panel.

(2) Remove the screw U 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.

FL connect board

CN451

Front panel

CN451

joint i

FL connect board

joint i

Fig.40

Drive motor

Bracket(2)

Drive motor

joint j

Fig.41

Fig.38

Front panel

Fig.39

(No.22042)1-15

Page 16

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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 V 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 motor

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 W that attaches the switch board. Re-

move the tab on the joint "m" that fixes the front panel.

Drive motor

oint l

Belt

FL connect board

Fig.42

CN451

Switch board

Shift gear

Fig.43

joint m

Fig.44

joint k

Switch board

1-16 (No.22042)

Page 17

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2.2.7 Removing the FL display

(See Fig.45 to 50.)

(1) Remove the four screws X on the front side of the front pan-

el 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 Y that attach the FL display cover.

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

Case cove

FL connect board

CN671

CN672

FL cover

Fig.48

Fig.45

oint n

FL panel

joint n

Fig.46

FL cover

Fig.47

(No.22042)1-17

Page 18

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(4) Remove the two screws Z 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.

FL cover

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 Z’ that attach the FL connect

board.

FL board

CN673

Fig.50

Lens

FL connect board

Z'Z'

Fig.51

1-18 (No.22042)

Page 19

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2.3 CD Mechanism Assembly

2.3.1 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 in-

dicated 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.

CL. base assembly

Hook a

Tray gear

TRAMECHA assembly

Idle gear

Tray

Fig.3

Part c

Part b

Fig.4

TRAMECHA assembly

Tray

Fig.1

Fig.2

Idle gea

Tray gear

Hook d

Idle gea

Fig.5

Hook d

Tray

(No.22042)1-19

Page 20

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2.3.2 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 arrow-marked 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.

TRAMECHA assembly

Part g

Idle gear

Tray gea

Fig.6

Tray gea

Part f

L. base assembly

Fig.7

Spring

Part g

Fig.8

Spring

Groove of CH. base assembly

Fig.9

1-20 (No.22042)

Page 21

2.3.3 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.

Flexible wire

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Soldered part h

Shorting round

CN601 on mechanism P.C. board

Soldered part i

Fig.10

(No.22042)1-21

Page 22

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2.3.4 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:

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.

Part j of rack plate

Idle gear

Flexible wire

CH. base assembly

Pickup assembly

Shorting round

CN601 on mechanism P.C. board

Fig.11

T-T assembly

Pickup assembly

Fig.12

Part k

Shaft

jPart j

Rack plateE

CH. base assembly

Fig.13

Pickup

P.S. spring

Fig.14

1-22 (No.22042)

Page 23

UX-Z7MDR

2.3.5 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.

Part k

Part j

2.3.6 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.

Feed motor assembly

Fig.17

Part I

Part m

Pickup assembly

CH. base assembly

Fig.15

Middle gear

Fig.16

Rack plate

Part n

(No.22042)1-23

Page 24

UX-Z7MDR

2.4 MD mechanism assembly

2.4.1 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.

(Bottom)

Main board

CN408

CN407

2.4.2 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.

Joint c

Fook

Joint c

Mechanism cove

Fig.3

Joint b Joint b

Fig.1

CN451

Pickup Solder part

Fig.2

Main board

CN321

1-24 (No.22042)

Page 25

2.4.3 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.

Head lifter

Spring

Head lifter

Fig.5

UX-Z7MDR

Fig.4

2.4.4 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.

Head lifter

Spring

Fig.6

Fig.4,5,6

Head assembly

Fig.7

(No.22042)1-25

Page 26

UX-Z7MDR

2.4.5 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 single

flame.

Loading assembly

Joint d

Fig.8

Loading assembly

Traverse mechanism

assembly

1-26 (No.22042)

Fig.9

Single flame

Page 27

UX-Z7MDR

)

2.4.6 Loading assembly

2.4.6.1 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.

2.4.6.2 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.

Slide base (R)

Slide base (L

Fig.10

Part e

2.4.7 Loading mechanism assembly

2.4.7.1 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.

2.4.7.2 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.

Loading mechanism

assembly

Loading motor assembly

Joint f CN612

Loading mechanism base

Fig.11

Wire holder

Cam switch board

Slit washer

Cam gear

Fig.12

Loading motor

Fig.13

Belt

(No.22042)1-27

Page 28

UX-Z7MDR

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

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

Slide bar

Cartridge holder assembly

Eject bar

2.4.7.4 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.

Eject bar

Part g

Fig.14

Slide bar

Eject bar

1-28 (No.22042)

UD base

Cartridge holder assembl

Fig.15

Page 29

UX-Z7MDR

2.4.8 Traverse mechanism assembly

2.4.8.1 Removing the Insulators (See Fig.16)

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

traverse mechanism chassis.

2.4.8.2 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 release

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

Pickup unit

Insulators

Traverse machanism chassis

Fig.16

Joint h

Pickup guide

Pickup unit

2.4.8.3 Removing the pickup (See Fig.18)

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

Shaft holder (F)

Rack spring

Shaft holder (R)

Fig.17

Pickup

Shaft

Fig.18

(No.22042)1-29

Page 30

UX-Z7MDR

2.4.8.4 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 assem-

bly.

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

et.

2.4.8.5 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.

Traberse mechanism board Soldering j

Soldering i

Feed motor assembly

Fig.19

Feed motor

Feed motor bracket

Fig.20

1-30 (No.22042)

Page 31

UX-Z7MDR

2.4.9 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)

Slide bar

Eject bar

UD base (Bottom)

Cam switch board

Point marked

Cam switch boss

Ditch

UD base

Fig.21

Ditch m

Cartridge holder assembly

Loading slider

Eject lever

Fig.22

(No.22042)1-31

Page 32

UX-Z7MDR

(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)

Loading motor assembly

Eject lever

Slide bar CN612

Fig.23

Cam gear

Point marked

Boss

Cam switch

Cam switch board

Cam gear (Triangle mark)

Eject lever

1-32 (No.22042)

Page 33

UX-Z7MDR

(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)

Hook e'

Hook e

Hook e'

Loading mechanism base

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)

Slide base (R)

Part v

Slide base (R)

Cam gear

Part v

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)

Slide base (L)Slide base (R)

Part w

Slide base (L)

Part w

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.

(No.22042)1-33

Page 34

UX-Z7MDR

2.5 Cassette mechanism section

2.5.1 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 playback

/ 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.

2.5.2 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.

Cassette mechanism

Fig.1

Playback / Recording & eraser head

Flexible board

CN31

Head amplifier & mechanism control P.C. board

Fig.2

Playback / Recording & eraser head

Flywheel R

Trigger armHead mount

Spring 1

Trigger arm

Flywheel R

Reversing azimuth scre

Spring 1

Head mount

Flexible board

Head amplifier & mechanism control P.C. board

Fig.3

1-34 (No.22042)

Page 35

UX-Z7MDR

2.5.3 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.

CN32

Belt

Main motor assembly

CN31

Head amplifier & mechanism control board

4pin parallel wire

2.5.4 Removing the main motor assembly

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

bly (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.

Main motor assembly

Capstan belt

Motor pulle

Fig.5

Flexible board

Fig.4

Mechanism moto

Main motor assembly

Capstan belt

Main motor assembly

Flywheel

Fig.6

Fig.7

assembly

Motor pulley

Motor pulleyCapstan belt

(No.22042)1-35

Page 36

UX-Z7MDR

2.5.5 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.

Flywheel R Flywheel L

Capstan shaft R

Slit washer 1

Fig.8

Slit washer 1

Capstan shaft L

Flywheel R Flywheel L

Fig.9

2.5.6 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.

Reel pulse board

a b c d e

Solenoid

Fig.10

1-36 (No.22042)

Page 37

3.1 MD adjustment(Auto adjust)

(1) Setting of MD adjustment (2) Initialize of EEPROM

UX-Z7MDR

SECTION 3

Adjustment method

Press MD REC button and POWER button together, then connect AC cord.

INDICATION "TEST MODE1"

Power to ON by MD PLAY button by main body,then MD to stop by STOP button on meinbody.

INDICATION "TEST MODE1"

Complete setting

(3) Adjust the laser power

Set to MD adjustment mode

set to MD adjustment mode

INDICATION "TEST MODE1"

Press PLAY MODE button of remote controller

INDICATION "TEST MODE1"

Comolete the Initialize of EEPROM

Press 4 button of remote controller

Insert the sensor of laser power meter

Press 2 button of remote controller

Setting the PLAYBACK LASER POWER

Laser power to up by F.SKIP button of remote controller

Adjust to morthsn 0.68mW or same as 0.68mW

Press STOP button of remote controller

Laser power to down by B.SKIP button of remote controller

Setting the RECORDING LASER POWER

Laser power to up by F.SKIP button of remote controller

Adjust to less than 6.23mW or same as 6.23mW

Press STOP button of remote controller

Eject the sensor to laser power meter by EJECT button of main body

Complete the RECORDING LASER POWER adjustment

Laser power to down by B.SKIP button of remote controller

Complete the PLAYBACK LASER POWER adjustment

(No.22042)1-37

Page 38

UX-Z7MDR

(4) Disc adjustment(Auto adjust)

Set to MD adjustment mode

Insert Pre-Mastard disc

Press PLAY / button of remote controller

INDICATION "ON TUNING"

START the AUTO ADJUSTMENT

Adjustment OK?

Yes

INDICATION "ON TUNING"

Press STOP button of remote controller

Press EJECT button of main body,then took out Recordable disc

INDICATION "NG ERR;**

Adjustment OK?

Yes

INDICATION "ON TUNING"

Press STOP button of remote controller

Press EJECT button of main body,then took out Pre-Masterd disc

Insert Recordable disc

Press MD PLAY / button of remote controller

INDICATION "ON TUNING"

Start the AUTO ADJUSTMENT

INDICATION "NG ERR ; **

Complete the AUTO ADJUSTMENT

Press STANDBY/ON button of main body or remote controller

Release the TEST MODE then power OFF

RESET by disconnect the AC cord

CODE

Adjustment NG part

Not complete the AUTO ADJUSTMENT

Rest swith detection

Focus ON

Pit area EF barance,Tr offset adj

Pit area ABCD level adj

Pit area Focus servo AGC

Pit area Tracking servo AGC

Pit area Focus bias adj

GRV area EF baranee,TR offset adj

GRV area ABCD level adj

GRV area Focus servo AGC

GRV area Tracking servo AGC

GRV area Focus bias adj

Temp

EEPROM write

AUTO ADJUST complte

1-38 (No.22042)

Page 39

3.2 Cassette adjustment

3.2.1 Cassette mechanism section 3.2.2 Cassette mechanism section (Back side)

UX-Z7MDR

Head azimuth adjusting screw (Forward side)

3.2.3 Cassette AMP board

MOTOR SPEED

VR37

BIAS ADJ

VR31

Head azimuth adjusting screw (Reverse side)

VR37

C308

C310

R315

R314

L301

R327

B155

VR31

C221

Q302

C319

R313

C314

RECRAGRECL

C313

C317

C121

B112

SW8V

L303

C316

Head azimuth adjusting screw (Forward side)

Head azimuth adjusting screw (Reverse side)

Playback/Recording & eraser head

B102

B152

C302

R103 1

C301

C111

B164

C306

R304

C109

B158 8

B106

C101

B166

R116

R212 R211 C211

R216

IC32

B101

C201

B109B108

C209

PBRAGPBL

CN34

Q305

R310

R335

C106

Q103

R305

B198

R353

C307

R303

R122

Q101

C103 B163

Q321

R221

B156

C303

R115

R101

B157

R108

C113 R110 R109

R102

C110

C104

R301

R121

C108

C107

B151

R112

R111

C102

R107

CN33

R342

C213 R210 R209

C207

B159

R341

C208

R207

B200

B110

CN31

R205

R208

B160

R340

R105 C105

R343

C206

R345

C305

R201

1IC31

TAP

C304

B113

C202

C210

Q331

RRE

C375

C205

B161

R215

R339

C203

C334

R106

R206

5VMGSOL

R203

R204

C204

B168

PHO

B153

R104

R222

R202

C333

C332

R375

Q201

PLA

C331

Q372

Q203

R331

FRE

B167

70u

CN32

B162

R372 R373

C371

Q375

R371

R376

C374

R338

C376

D375

Q376

Q371

R337

R336

IC33

(No.22042)1-39

Page 40

UX-Z7MDR

3.2.4 Tape Recorder Section

Items

Confirmation of head angle

Confirmation of tape speed

3.2.5 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 ohm)

: Headphone terminal

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

Measurement

conditions

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

er R

(Load resistance: 4 ohm) 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

1-40 (No.22042)

Page 41

3.2.6 Electrical Performance

Items

Adjustment of recording bias current (Reference Value)

Adjustment of recording and playback frequency characteristics

Measurement

conditions

Mode : Forward or reverse mode

• Recording mode

• Test tape : AC-514 to TYPE ll and

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

headphone terminals

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

Measurement method Standard Values Adjusting positions

1 With the recording and playback mechanism

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

2 After connecting 100 ohm in series to the re-

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

3 After resetting the [PAUSE] mode start re-

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

4.20µA (TYPE ll ).

1 With the recording and playback mechanism

load the test tapes (AC-514 to TYPE ll ), 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 ll ,adjust VR31 for Lch and VR32 for Rch so that the output deviation between 1kHz and 10kHz becomes -1dB 2dB.

AC-225 : 4.20µA AC-514 : 4.0µA

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

UX-Z7MDR

VR31

3.2.7 Reference Values for Electrical Function Confirmation Items

Items

Recording bias frequency

Eraser current (Reference value)

Measurement

conditions

Forward or reverse

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

Forward or reverse

• Recording mode

• Test tape : AC-514 to TYPE ll and

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

terminals

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 ll ), 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 ll and AC-225 to TYPE l), 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.

100 kHz

6 kHz

TYPE ll : 120 mA TYPE l : 75 mA

(No.22042)1-41

Page 42

UX-Z7MDR

3.3 Flow of functional operation until TOC read

Power ON

Play Key

Slider turns REST SW ON.

Automatic tuning of TE offset

Check Point

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

Tracking error waveform at TOC reading

Approx.3sec

Tracking servo off states

Automatic measurement of TE amplitude and automatic tuning of TE balance

VREF

pin 25 of IC601(TE)

Approx

1.8V

Disc states to rotate

Tracking servo on states

Disc to be braked to stop

TOC reading finishes

500mv/div 2ms/div

Fig.1

Laser ON

Detection of disc

Automatic tuning of Focus offset

Automatic measurement of Focus S-curve amplitude

Disc is rotated

Focus servo ON (Tracking servo ON)

Automatic measurement of Tracking error amplitude

Automatic tuning of Tracking error balance

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

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

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

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

1-42 (No.22042)

Automatic tuning of Focus error balance

Automatic tuning of Focus error gain

Automatic tuning of Tracking error gain

TOC reading

Play a disc

Confirm the eys-pattern at the lead of TP1

Page 43

UX-Z7MDR

3.4 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.

Is the level of

RFOUT under

1.25V 0.22Vp-p?

Replace it.

YES

O.K

(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.

3.5 Replacement of laser pickup

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

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

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

Play a disc.

Check the eye-pattern at TP1.

Finish.

(No.22042)1-43

Page 44

UX-Z7MDR

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

• Pin layout

SECTION 4

Description of major ICs

• Block diagram

1 2 3 4 5 6 7 8

9 10 11 12

AINL

VCML

AINR

VCMR

VRAD ARDV

VCOM

AOUTL

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

VA AGND VB VD DGND

Modulator

Common Voltage

LPF

Modulator

Decimation Filter

8x Interpolator

Clock Divider

Serial I/O Interface

MCLK CMODE

LRCK SCLK

SDTO SDTI

OUTR

LPF

Modulator

PWAD PWDA

• Pin Function

Symbol I/O Function

No.

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

8x Interpolator

Symbol I/O Function

No.

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

1-44 (No.22042)

Page 45

4.2 AN22000A-W (IC601) : RF & SERVO AMP

• Terminal layout

ACBDPDF

323130292827262524232221201918

123456789

VCC

RFN

PDE

RFIN

RFOUT

TBAL

FBAL

ARF

CAGC

GCTRL

CEA

FEOUT

FEN

TEN

TEOUT

TEBPF

10111213141516

BDO

OFTR

CBDO

3TOUT

COFTR

• Block diagram

RFOUT

RF_EQ

AMP

AMP17GCA BCA

624754 8

RFIN

AGC

NRFDET

GCA BCA

GCTL26TBAL

11 12

BDO

SUBT

FBAL

25 16 3

VDET

VREF

GND

RFDET

13 14

OFTR

3TENV

VDET

UX-Z7MDR

• Pin function

Symbol I/O Function

No.

1 PD I APC Amp. input terminal 2 LD O APC Amp. output terminal 3 VCC - Power supply terminal 4 RFN I RF adder Amp. inverting input terminal 5 RFOUT O RF adder Amp. output terminal 6 RFIN I AGC input terminal 7 CAGC I Input terminal for AGC loop filter capacitor 8 ARF O AGC output terminal 9 CEA I Capacitor connecting terminal

for HPF-Amp.

10 3TOUT O 3 TENV output terminal 11 CBDO I Capacitor connecting terminal for envelope

detection on the darkness side

12 BDO O BDO output terminal

13 COFTR I Capacitor connecting terminal for envelope

detection on the light side

14 OFTR O OFTR output terminal

15 NRFDET O NRFDET output terminal 16 GND - Ground

17 VREF O VREF output terminal 18 VDET O VDET output terminal 19 TEBPF I VDET output terminal 20 TEOUT O TE Amp. output terminal 21 TEN I TE Amp. inverting input terminal

22 FEN I FE Amp. inverting input terminal 23 FEOUT O FE Amp. output terminal

24 GCTL O GCTL & APC terminal 25 FBAL O FBAL control terminal 26 TBAL O TBAL control terminal

27 E I Tracking signal input terminal 1 28 F I Tracking signal input terminal 2 29 D I Focus signal input terminal 4

30 B I Focus signal input terminal 3 31 C I Focus signal input terminal 2 32 A I Focus signal input terminal 1

(No.22042)1-45

Page 46

UX-Z7MDR

4.3 AN7317 (IC32) : R / P amp.

• Pin layout & block diagram

60k

112k

Pre

112k

• 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 6 ALC low-cut 7ALC 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

13 12 11 10 9

30k

Pre

45678

Mute R.R

ALC

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

• Pin layout • Block diagram

16 15 14 13 12 11 10 9

VDD

ENABLE

STROVE DATA CLOCK Q1 Q2 Q3 Q4 Vss

Q5 Q6 Q7 Q8 Q'S Q'SOUTPUT

1 2 3 4 5 6 7 8

1-46 (No.22042)

DATA

CLOCK

STROBE

UTPUT

ENABLE

8-STAGE

SHIFT REGISTER

8-BIT

LATCHES

3-STATE

OUTPUTS

PARALLEL OUTPUT

Q'S

SERIAL OUTPU

Page 47

4.5 XC62HR3502P-X (IC291) : Regulator

• Pin layout • Block diagram

VIN

UX-Z7MDR

VOUT

Current

Limit

123

• 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

4.6 GM71VS17400CLT5 (IC390,IC790) : DRAM

•Pin layout •Pin function

Vcc 1 I/O1 2 I/O2 3

WE 4

RAS 5

A11 6

A10 8

A0 9

A1 10

A2 11

A3 12

Vcc 13

26 Vss 25 I/O4 24 I/O3 23 CA 22 OE 21 A9

19 A8 18 A7 17 A6 16 A5 15 A4 14 Vss

Pin No. Symbol Function

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

9~12 A0~A3 Address input

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

15~19 A4~A8 Addres input

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

Output

Control

Voltage

Reference

VSS

(No.22042)1-47

Page 48

UX-Z7MDR

4.7 MN662790RSC(IC651):Digital servo & processor

• Pin layout

60 41

1 20

• 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) out-

put) 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)

1-48 (No.22042)

Page 49

Pin No. Symbol I/O Description

38 RFDET I RF detection signal input L : detection 39 BDO I Dropout signal input H : dropout 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-Z7MDR

(No.22042)1-49

Page 50

UX-Z7MDR

4.8 GP1UM261XK (IC602) : Receiver

• Pin layout

Vout

• Block diagram

GND

Vcc

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

• Pin layout

CH3IN

OUT3

REG+

REGB

• Block diagram

Vm1

VBS2

CH1

CH2

VBS1

VREF

VBS1

IN1+

IN1-

OUT1

VM1(+)

VM1(-)

VM2(+)

VM2(-)

OUT2

IN2-I IN2+

VREFO

VREF

REGB

REG+

3 6 7

15 16

VREG

IN3-

VBS2

IN1+

VBS1

SS,GND

Vm2

IN3+

N.C

IN1-

Vm1

OUT1

Vrefm1

1.25V

19 17

MUTE1 MUTE2

BIAS

VM3-

VM1-

VBS1

Low,Open MUTE ON

VM3+

VM1+

1~4 CH

GND

Vm1

VBS1

B.P.F.LimiterAmp

VM4+

VM2+

VBS2

Demodulator

VM4-

VM5+

VM5-

IN2-

VM2-

OUT2

Vm2

VREFO

HI :Sleep

SLEEP

5CH

TSD

10 113233

GND (4PIN)

OUT5

IN5-

IN2+

MUTE1

Vrefm2

IN5+

IN4+

MUTE2

SS,GND

Integrator

Comparator

GND Vdd Vout

IN4-

OUT4

VREF

VREFO

VBS2

CH3

VBS2

CH4

VBS2

CH5

VBS2

Vm2

40 37 41 42

23 24 22

26 25 27

IN3IN3+ OUT3 CH3 IN

VM3(+)

VM3(-)

VM4(+)

VM4(-)

IN4IN4+ OUT4

VM5(+)

vm5(-)

IN5IN5+ OUT5

1-50 (No.22042)

Page 51

4.10 LB1641 (IC402) : DC Motor driver

•Pin layout

GND

OUT1

IN1

IN2

VCC1

VCC2

OUT2

4.11 BD7910FV-X (IC450) : Pre driver

• Block diagram

20 19 18 17 16 15 14 13 12 11

UX-Z7MDR

• Truth table

Input Output Mode

IN1 IN2 OUT1 OUT2

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

- +

Vregin

1 2 3 4 5 6 7 8 9 10

- + VG

SVcc

Pre driver

Mute

EFM

• 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

(No.22042)1-51

Page 52

UX-Z7MDR

4.12 BA3126N(IC31) : R/P Switch

S W

R E C

P / B

S W

C O N T .

G N D

V c c

123456789

4.13 BR93LC66F-X (IC403):EEPROM

• Terminal layout • Pin Functions

Symbol I/O Function

VCC

1 2 3 4

GND

VCC - Power supply

GND - Connect to GND

CS I Chip select input SK I Serial clock input

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

DO O

4.14 CXA2523AR (IC300) : MD servo

• Block diagram

BOTM

ABCD34FE33AUX32ADFG31ADAGC30ADIN29ADFM28SE27CSLED26TE25WBLADJ

36 35

P / B

S W

R E C

Serial data output Internal state display output of READY/BUSY

PEAK

MORFO

39RFAGC

40AGCI

41COMPO

42COMPP

43ADDC

44OPO

45OPN

46RFO

47MORFI

AGC, EQ

Peak, Bottom Detector

Comp

USER

OP Amp

RF Amp

1 2

3VC4A5B6C7D8E9F10PD11

ADIP Amp TE/SE Amp

MUX FE Amp

ABCD Amp

3T Detector

I-V Amp APC

CPU

Command I/F

TEMP Amp

APC

PCREF

Vcc

3TADJ

22 EQADJ

21 VREF

20 F0CNT

19 XSTBY

18 XLAT

17 SCLK

16 SWDT

15 TEMP R

14 TEMP I

13 GND

1-52 (No.22042)

Page 53

• 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-Z7MDR

(No.22042)1-53

Page 54

UX-Z7MDR

4.15 CXD2662R (IC350) : DSP

• Pin layout

• Block diagram

PCO

FILI

FILO

CLTV

100

EFM

RFI

ASYI

BIAS

ASYO

ADFG

FGIN

SPFD

SPRD

F0CNT

75 ~ 51

100

1 ~ 25

PLL

EFM / ACIRC ENCODER / DECODER

COMP

ADIP DECODER

SPINDLE SERVO

OSCI

OSCO

XTSL

16 17 18 29

CLOCK GENERATOR

each block

SAMPLING RATE CONVERTER

FS256

LRCK

XBCK

FS4

MDDT1

90 52

27 28

SHOCK RESISTANT MEMORY CONTROLLER

ATRAC/ATRAC3 ENCODER/DECODER

DIGITAL AUDIO I/F

XRAS

XCAS

XWE

XOE

A00~A11

D0~D3

XINT

DADT

ADDT

XBCKI

LRCKI

DATA I

DIN~DIN1

DOUT

APC

FE TE

PEAK BOTM ABCD

AUX1

DCHG

ADIO

ADRT ADRB

DTRF

CKRF

XLRF

84 88 89 86 85 92 91 83

DQSY

SQSY

LDDR FFDR FRDR TFDR TRDR SFDR SRDR APCREF

77 66 75 74 63 64 65 67 76 68 69 71

ANALOG MUX

AUTO SEQUENCER

A/D CONVERTER

SERVO DSP

each block each block

SENS

MONITOR CONTROL

MNT0

MNT1

MNT2

CPU I/F

5689 12 34 13

10 7

WDT

XLAT

XRST

SCLK

SRDT

MNT3

SUBCODE PROCESSOR

PWM

GENERATOR

RECP

1-54 (No.22042)

Page 55

• 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. 49 D0 I/O External DRAM data bus. 50 D2 I/O External DRAM data bus.

UX-Z7MDR

(No.22042)1-55

Page 56

UX-Z7MDR

Pin No. Symbol I/O Function

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

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.

recording EFM PLL.

1-56 (No.22042)

Page 57

4.16 L4909 (IC910) : Regulator

•Pin layout

1 2 34 56 78 9101112131415

• Block diagram

UX-Z7MDR

EN1 EN2 EN3

TRIG

GND

THERMAL

SHUTDOWN

6 7 9

ENABLE

CONTROL

OVER

CURRENT

CHECK

REFERENCE GENERATOR

REG1 REG2 REG3

• 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

REF+20%

REF

REG1

REG2

REG3

3,13

VIN VINB

VO1

FB1

VO2

FB2

VO3

FB3

(No.22042)1-57

Page 58

UX-Z7MDR

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

• Block Diagram

ALC

BUFF

FM S-METER

FM IF

OSC

S-CLRVE

PM DET

REG

MIX

SD COMP

AM/FM IF-BUFF

RF.AMP

AM IF

AGC

AM S-METER

GND

DET

TUNING DRIVE

STEREO DRIVE

VCC

P-DET

VCO 384KHz

DECODER ANIT-BIRDIE

STEREO 5N SW

FF 38k

MUTE

19k

12 13

FF 19k

17 16

/LS

PILOT DET

• 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

TUNED

STEREO

O When the set is tunning,this terminal becomes "L".

O Stereo indicator output. Stereo "L", Mono: "H" 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 input. 14 15

FM/AM

MONO

/ST

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

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

1-58 (No.22042)

Page 59

4.18 LA4628 (IC905) : Power amp.

•Pin layout

UX-Z7MDR

• Block diagram

PRE GND

Vcc

RIPPLE

FILTER

PREDRIVER

BIAS

CIRCUIT

STANDBY

PREDRIVER

POWER

LOAD SHORT

PROTECTOR

POWER

OVER VOLTAGE/

SURGE PROTECTOR

THERMAL

SHUT DOWN

POWER

OUTPUT PPIN TO VCC

SHORT PROTECTOR

OUTPUT PIN TO GND

SHORT PROTECTOR

Vcc

OUTPUT PIN TO GND

SHORT PROTECTOR

1314-OUT1

POWER

GND

+OUT1

-OUT2

IN2

POP NOISE

PREVENTION

CIRCUIT

4.19 TC7S08F-W (IC340) : Buffer

• Pin layout • Block diagram

PREDRIVER

POWER

LOAD SHORT PROTECTOR

OUTOUT PIN TO VCC

SHORT PROTECTOR

POWER

GND2

+OUT2

Vcc

IN B

IN A

5 4VDD

Vss

OUT X

GND

(No.22042)1-59

Page 60

UX-Z7MDR

4.20 LC72136N (IC2) : PLL frequency synthesizer

• Pin layout

FM/AM

CLOCK

FM/ST/VCO

AM/FM

SDIN

2 3 4 5 6 7 8 9 10 11

22 21 20 19 18 17 16 15 14 13 12

XT GND LPFOUT LPFIN PD VCC FMIN AMIN

IFCONT IFIN

• Block diagram

I/F

Power

Reset

1/2

Data Shift Register & Latch

7821113

• Pin function

Symbol I/O Function

No.

1 XT I X'tal oscillator connect (75kHz) 2FM

/AM O LOW:FM mode

3 CE I When data output/input for 4pin(input)

and 6pin(output): H

4 DI I Input for receive the serial data from

controller 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

/FM O Open state after the power on reset

9 LW I/O Input/output port

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

Reference

Driver

Swallow Counter

1/16,1/17 4bit

12bit

Programmable

DriverS

Phase

Detector

Charge Pump

Unlock

Detector

Universal

Counter

Symbol I/O Function

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)

When power ON:Reset circuit move

18 PD O PLL charge pump output (H: Local

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

Height impedance) 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

I X'tal oscillator(75KHz)

1-60 (No.22042)

Page 61

4.21 LA6541-X (IC801) : Servo driver

• Pin layout & Block diagram

Vcc Vref Vin4 Vg4 Vo8 Vo7

24 23

11k ohm

UX-Z7MDR

Gnd

Vcc

Vo6 Vo5 Vg3 Vin3 Cd Res

17 16

11k ohm

- +

Level shift

B T L driver

11k ohm

Vcc Mute Vin1 Vg1 Vo1 Vo2 Vo3 Vo4 Vg2 Vin2 Reg

3456

Gnd

78 9101112

• Pin function

Pin No. Symbol Description

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)

B T L driver

Level shift

11k ohm

out

RESET

Regulator

Reg In

(No.22042)1-61

Page 62

UX-Z7MDR

4.22 LA72723(IC3): RDS demodulation

• Pin layout

VREF

MPXIN

Vdda

Vssa

FLOUT

CIN

TES

XOUT

• Block Diagram

+5V

Vdda

Vssa

MPXIN

TEST

RDS-ID/READY

RDCL

RDDA

RST

MODE

Vddd

Vssd

XIN

REFERENCE

VOLTAGE

ANTI ALIASING

FILTER

TEST

VREF

57kHz

(SCF)

BPF

FLOUT

SMOOTHING

FILTER

CLK(4.332MHz)

OSC

VREF

CIN

PLL

(57kHz)

CLOCK

RECOVERY

(1187.5Hz)

DATA

DECODER

RAM

(128-bits)

RDS-ID

DETECT

Vddd

Vssd

RDDA

RDCL

MODE

RST

RDS-ID READY

+5V

XIN

XOUT

• 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)

1-62 (No.22042)

Page 63

4.23 XC62ER3602M-X (IC400) : Regulator

•Pin layout

UX-Z7MDR

• Block diagram

EXT

• Pin function

Pin No. Symbol Function

1V 2V 3V

OUT

GND

Power supply input

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

Current

Limit

Voltage

Reference

4.24 TK11140SC-W (IC485) : Regulator

•Pin layout

on / off control 1

GND 2

Np (Vref) 3

• Block diagram

VIN

Rin=550k

on / off Ccont.

6 Vin

4 Vout

VOUT

Thermal Sensor

Bandgap Reference

Cnp

GND

(No.22042)1-63

Page 64

UX-Z7MDR

4.25 LC75345M-X (IC901) : E.volume

• Pin layout

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

• Block diagram

VDD

ROPOUT

RINM

VSS

LOPOUT

LSELO

RINP

LINM

LVRIN

ROOUT

RSB

LINP

LOUT

LTRE

RBASS2

RBASS1

LSB

LBASS2

RTRE

RVRIN

LTRE

LBASS1

RSELOR5R4

LVRIN

LSELO

LBASS2

LSB

LOUT

Vref

181716151413121110987654321

Vref

17 18

22 23

LVref

RVref

CONTROL

CIRCUIT

LOGIC

CIRCUIT

CONTROL

CIRCUIT

CCB

INTERFACE

LINP

LINM

LOPOUT

VSS

VDD

ROPOUT

RINM

RINP

1-64 (No.22042)

RESLO

RVRIN

RTRE

RBASS1

RBASS2

RSB

ROUT

Page 65

• 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.

UX-Z7MDR

(No.22042)1-65

Page 66

UX-Z7MDR

VICTOR COMPANY OF JAPAN, LIMITED

AV & MULTIMEDIA COMPANY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.22042)

Printed in Japan

200302WPC

JVC UX-Z7MDR Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1.1 Safety Precautions

SECTION 1

1.2 Warning

1.3 Caution

1.4 Critical parts for safety

1.5 Preventing static electricity

1.5.1 Grounding to prevent damage by static electricity

1.6 Handling the traverse unit (optical pickup)

1.7 Attention when traverse unit is decomposed

1.8 Important for laser products

SECTION 2

2.1 Main body

2.2 Front panel assembly

2.3 CD Mechanism Assembly

2.4 MD mechanism assembly

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

2.4.2 Removing the mechanism cover (See Fig.3)

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

2.4.4 Removing the head assembly (See Fig.7)

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

2.4.6 Loading assembly

2.4.7 Loading mechanism assembly

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

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

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

2.4.8 Traverse mechanism assembly

2.4.8.1 Removing the Insulators (See Fig.16)

2.4.8.2 Removing the pickup unit (See Fig.17)

2.4.8.3 Removing the pickup (See Fig.18)

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

2.4.9 Reattaching the loading assembly

2.5 Cassette mechanism section

2.5.4 Removing the main motor assembly

3.1 MD adjustment(Auto adjust)

SECTION 3

3.2 Cassette adjustment

3.2.1 Cassette mechanism section 3.2.2 Cassette mechanism section (Back side)

3.2.3 Cassette AMP board

3.2.4 Tape Recorder Section

3.2.5 Reference Values for Confirmation Items

3.2.6 Electrical Performance

3.2.7 Reference Values for Electrical Function Confirmation Items

3.3 Flow of functional operation until TOC read

3.4 Maintenance of laser pickup

3.5 Replacement of laser pickup

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

SECTION 4

4.2 AN22000A-W (IC601) : RF & SERVO AMP

4.3 AN7317 (IC32) : R / P amp.

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

4.5 XC62HR3502P-X (IC291) : Regulator

4.6 GM71VS17400CLT5 (IC390,IC790) : DRAM

4.7 MN662790RSC(IC651):Digital servo & processor

4.8 GP1UM261XK (IC602) : Receiver

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

4.10 LB1641 (IC402) : DC Motor driver

4.11 BD7910FV-X (IC450) : Pre driver

4.12 BA3126N(IC31) : R/P Switch

4.13 BR93LC66F-X (IC403):EEPROM

4.14 CXA2523AR (IC300) : MD servo

4.15 CXD2662R (IC350) : DSP

4.16 L4909 (IC910) : Regulator

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

4.18 LA4628 (IC905) : Power amp.

4.19 TC7S08F-W (IC340) : Buffer

4.20 LC72136N (IC2) : PLL frequency synthesizer

4.21 LA6541-X (IC801) : Servo driver

4.22 LA72723(IC3): RDS demodulation

4.23 XC62ER3602M-X (IC400) : Regulator

4.24 TK11140SC-W (IC485) : Regulator

4.25 LC75345M-X (IC901) : E.volume