Jvc HX-Z1 Service Manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

HX-Z1

Contents

Safety precautions Preventing static electricity Important for laser products Importance administering point on the safety Disassembly method

1-2 1-3 1-4

1-5 1-6

COMPACT

DIGITAL AUDIO

Area Suffix

J ------------------------- U.S.A. C ----------------------- Canada

Adjustment method

1-24 Flow of functional operation until TOC read (CD) Maintenance of laser pickup Replacement of laser pickup Description of major ICs

1-29

1-30

1-31~41

No.21088

Jun. 2002

1-1

HX-Z1

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

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

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

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

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

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

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

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

0.15 F AC TYPE

1500 10W

Good earth ground

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

Place this probe on each exposed metal part.

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

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

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

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

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

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

In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety.

(This regulation does not correspond to J and C version.)

1-2

HX-Z1

Preventing static electricity

1. Grounding to prevent damage by static electricity

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

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

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

2-1 Ground the workbench

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

2-2 Ground yourself

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

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

3. Handling the optical pickup

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

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

4. Handling the traverse unit (optical pickup)

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

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

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

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

Attention when traverse unit is decomposed

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

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

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

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

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

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

CD changer mechanism

assembly

CD traverse

unit

Flexible cable

Fig.1

Soldering

Fig.2

1-3

HX-Z1

Important for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

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

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

VARNING : Osynlig laserstrålning är denna del är öppnad

och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet

alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen.

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

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

CAUTION

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

ADVARSEL : Usynlig laserstråling ved åbning , når

sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når

sikkerhetsbryteren er avslott. unngå utsettelse for stråling.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

CLASS 1 LASER PRODUCT

1-4

Importance administering point on the safety

HX-Z1

Caution: For continued protection against risk of fire, replace only with same type 2.5A/125V for F103, 5A/125V for F001 and 6A/125V for F101, F102. This symbolspecifies type of fast operating fuse.

Precaution: Pour evitisques de fer reux, remplacez le fusible de surete de F103 comme le meme type que 2.5A/125V, et 5A/125V pour F001 et 6A/125V pour F101, F102. Ce sont des fusibles suretes qui functionnes rapide.

1-5

HX-Z1

Disassembly method

Removing the metal cover

(See Fig.1 ~ 3)

Remove the six screws A on the back of the body.

Remove the screw B on each side of the body.

Remove the metal cover from the body by lifting the rear part of the cover.

CAUTION:

Removing the CD changer mechanism assembly (See Fig.4, 5)

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

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

Metal cover

Fig.1

Disconnect the card wire from connector CN651 on the CD servo control board on the right bottom of the CD changer mechanism assembly.

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

Remove the CD changer mechanism assembly while lifting the rear part.

CAUTION:

Front panel assembly

Do not damage the CD fitting when removing the CD changer mechanism assembly.

CD changer mechanism assembly

Rear part

Fig.2

Metal cover

Fig.3

CD servo control board

CN651

1-6

CD changer mechanism assembly

Fig.5Fig.4

HX-Z1

Removing the front panel assembly

(See Fig.6 ~ 9)

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

Disconnect the card wire from connector CN44 and CN870 on the main board on the right side of the body. Remove the screw D attaching the wire from extending from the underside of the front panel assembly.

Disconnect the wire from connector CN701 on the bridge board.

Cut the tie band.

Disconnect the wire from connector CN231 and CN232 on the primary board on the left side of the body and remove the band fixing the wire.

Remove the plastic rivet attaching the inner bar in the center of the front panel assembly.

Front panel assembly

Joint a

Bridge board

CN701

Fig.6

Primary board

CN231, CN232

Main board

CN870

Front panel assembly

REFERENCE:

Remove the three screws E attaching the front

Keep the plastic rivet for reuse.

panel assembly at the bottom of the body.

Release the two joints a on the lower left and right sides of the front panel assembly using a screwdriver, and remove the front panel assembly toward the front.

REFERENCE:

Front panel need to be tilt a little bit as release from bottom chassis.

Inner bar

Bridge board

CN701

Bottom chassis

Plastic rivet

Joint a

Fig.7

Front panel assembly

Band

Primary board

CN231, CN232

Fig.8

Front panel assembly

Fig.9

1-7

HX-Z1

Removing the antenna board

(See Fig.10, 11)

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

Antenna board

CN1

Rear panel

REFERENCE:

Disconnect the card wire from connector CN1 on the antenna board on the right side of the body.

Remove the band attaching the antenna board.

Remove the two screws F on the rear panel on the back of the body.

There is no need to remove the CD changer mechanism assembly.

Band

Fig.10

Rear panel

1-8

Fig.11

HX-Z1

Removing the rear panel

(See Fig.12 ~ 17)

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

Remove holding board by remove two plastic rivets and then slide out the holding board as shown in fig.

12.

Disconnect fan wire from connector CN206.

Cut off the tie band that tied fan wire on inner bar.

Remove eight screws F from rear panel.

Detach joint b to release rear panel from inner bar.

Release joints c which on right bottom and left bottom of rear panel. The joint can be release by pull outward the side of rear panel.

REFERENCE:

Fan assembly will come off with rear panel.

Joint b

Fan assembly

Holding board

Tie band

Holding board

Fig.12

Fig.13

Inner bar

Plastic Rivets

CN206

Rear panel

CN206

Rear panel

Fig.14

Rear panel

Joint c

Fig.16

Fig.17

Joint c

Fig.15

1-9

HX-Z1

Removing the fan assembly

(See Fig.18, 19)

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

Remove two screws G on the rear panel.

Rotate fan assembly in clockwise direction to release fan assembly from rear panel (joint d).

Rear panel

Fig.18

Joint d

Removing the main board (See Fig.20)

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

Disconnect the card wire from connector CN44 and CN870 on the main board.

Remove the screw D attaching the board.

Disconnect connector CN217 and CN311 on the main board outward and release from the base chassis (joint e) upward.

Fan assembly

Main board

CN870

CN44

Joint d

Fig.19

CN311

Fig.20

CN217

Joint e

1-10

HX-Z1

Removing the bridge board / regulator board / heat sink (See Fig.21 ~ 27)

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

Remove the plastic rivet attaching the stay inner bar and remove the screw H on the bridge board.

Move the inner bar forward and upward to release from the front section (joint f) and from the bridge board (two joints h) respectively.

Remove the two plastic rivets setting the holding board fixing the bridge board and the primary board. Move the bracket board in the direction of the arrow.

Disconnect the wire from connector CN212, CN213 and CN214 on the primary board respectively and remove the band attaching the wires.

Disconnect the wire from connector CN701 on the bridge board.

Inner bar

Bridge board

Fig.21

Plastic rivet

Joint f

Plastic rivet

Bridge board

CN701

Band

Joint g

CN212, CN213

Bridge board

Fig.22

Primary board

CN214

Plastic rivets

Holding board

Fig.23

Bridge board

Primary board

CN214

CN212, CN213

Regulator board

Fig.25Fig.24

Heat sink

Heat sink bracket

1-11

HX-Z1

Remove the two screws I attaching the heat sink bracket and move the heat sink in the direction of the arrow to release from the base chassis (two joints i). The bridge board and the regulator board come off with the heat sink.

Remove the two screws J attaching the heat sink bracket.

Remove the two screws M, detach bridge board from regulator board by disconnect connector CN205.

Remove the screws K and L to detach regulator board from heat sink.

Bridge board

Heat sink

CAUTION:

As assembly back the regulator board and bridge board to heat sink. Regulator board MUST be assembly to heat sink first and screw K and L MUST be screwed before bridge board attach to regulator board.

Regulator board

Heat sink

Heat sink bracket

Fig.26

Heat sink bracket

Regulator board

CN205

Fig.27

Bridge board

CN215

1-12

Removing the power transformer assembly (See Fig.28, 29)

HX-Z1

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

Remove the screw N attaching the primary board.

Disconnect the wire from connector CN231 and CN232 on the primary board.

Remove the four screws O attaching the power transformer assembly.

Cut the tie band and detach power cord from primary board.

REFERENCE:

When disconnecting the power cord from connector CN250 on the primary board, remove the fixing band.

Power transformer assembly

Primary board

CN231, CN232

Primary board

Fig.28

Power transformer assembly

CN250

Band

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

Removing the cassette mechanism assembly (See Fig.30)

Disconnect the card wire from connector CN33 on the head amplifier & mechanism control board.

Remove the two screws P, and the screw Q attaching the cassette mechanism assembly.

Removing the headphone board

(See Fig.30)

Remove the screw Q attaching the wire extending from the headphone board.

Remove the screw R and pull out the headphone board backward.

Fig.29

Head amplifier & mechanism control board

CN33

Cassette mechanism assembly

Fig.30

Cord stopper

Headphone board

1-13

HX-Z1

Removing the display system control board (See Fig.31, 32)

Remove the four screws S attaching the stay bracket (1).

Disconnect the card wire from connector CN43 and CN880 on the display system control board.

Remove the ten screws T attaching the display system control board.

Removing the bottom board

(See Fig.33 ~ 35)

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

Stay bracket (1)

CN43

Display system control board

Fig.31

CN880

Display system control board

Pull out preset knob, sound mode knob on the front panel toward the front.

Remove the nut at volume knob encoder from front panel.

Remove the four screws U attaching the stay bracket (2).

Remove the eight screws V attaching the bottom board.

Sound mode knob

CN43

Front panel

Preset knob

Fig.32

Fig.33

CN880

Volume knob

1-14

Bottom board

Stay bracket (2)

Bottom board

Fig.35Fig.34

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

1.Remove the metal cover.

2.Remove the CD changer mechanism assembly.

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

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

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

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

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

HX-Z1

CN854

CN651

CD servo control board

CN652

CN801

CN601

CN151

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

Remove the front panel assembly.

1. Remove the CD changer mechanism assembly.

2. Remove the CD Servo control board.

3. Remove the screw B' retaining the lod stopper.

4. From the T.bracket section "b" and clamper base

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

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

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

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

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

10.

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

11.

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

T.Braket

Disc stopper

Earth

wire

Fig.1

Clamper base

Rod

T.Braket

Fig.2

Lod stopper (C/J version only)

Lock lever

Clamper ass'y

Fig.3

Fig.4

Return spring

1-15

HX-Z1

11.

Check whether the lifter unit stopper has been caught into the hole at the section "e" of CD tray assembly as shown in Fig.5. Make sure that the driver unit elevator is positioned as

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

[Caution]

13.

14.

15.

Chassis assembly

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

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

Stopper

CD tray assembly

Fig.5

Refer to Fig.7

Pulley gear

Pawl

Fig.6

CD tray assembly

Drive unit of elevator

Fig.7

CD tray assembly

1-16

Motor pulley

Fig.8

Pawl ,

Fig.9

HX-Z1

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

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

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

For dismounting only the CD traverse mechanism

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

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

Cam R1, R2 assembly

Cams R1, R2 assembly

Arrow

CD loading mechanism assembly

Fig.10

CD traverse mechanism

Arrow

Fig.11

Removing the CD pick unit (See Fig.13 )

Move the cam gear in the arrow direction "m" . Then, the CD pickup unit will be moved in the arrow direction "n" .

According to the above step, shift the CD pickup unit to

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

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

4. remove the CD pickup unit

Lifter unit

Stopper

Shaft

Fig.12

CD Pickup unit

Shaft

Stopper

Fig.13

Arrow

CD loading

mechanism

Shaft

Cam gear

1-17

HX-Z1

Removing the try select switch board (See Fig.14)

1.2.Remove the two screws G retaining the tray select switch board. Disconnect the tray select switch board from connector CN804 on the CD servo control board.

Removing the cam unit (See Fig.15 ~17 )

Remove the CD loading mechanism assembly.

While turning the cam gear "q", align the Paul "r" position of the drive unit to the notch position(Fig.16) on the cam gear "q". Pull out the drive unit and cylinder gear(See Fig.17).

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

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

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

Chassis assembly

Drive unit

CN851

CN854

Fig.14

Cam gear

Tray select switch board

CN804

Drive unit

Cylinder gear

Cam gear

Fig.15

Cams R1, R2 assembly

Cam unit

1-18

Fig.16

Select lever

Fig.17

HX-Z1

Fig.18

Fig.20

Fig.19

Fig.21

[Note]

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

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

Remove the two screws I retaining the gear bracket (See Fig.18). While pressing the pawl "t" fixing the gear bracket in the arrow direction, remove the gear bracket (See Fig.18). From the notch "u section" on the chassis assembly fixing the edge of gear bracket, remove and take out the gear bracket(See Fig. 19). Remove the belts respectively from the right and left actuator motor pulleys and pulley gears(See Fig. 18). After turning over the chassis assembly, remove the actuator motor while spreading the four pawls "v" fixing the right and left actuator motors in the arrow direction(See Fig. 20).

Pulley gear

Belt

Motor pulley

Belt

Pulley gear

Motor pulley

Gear bracket

Pawl

Actuator motor

Chassis assembly

Gear bracket

Pulley gear

Gear B

Cylinder gear

Gross gear U

Gear C

Gross gear L

Select gear

Gear B

Gear C

Pulley gear

Assembly and Configuration Diagram

1-19

HX-Z1

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

Remove the slit washer fixing the cams R1 and R2

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

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

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

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

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

[Caution]

To reassemble the cylinder gear, etc.with the cam unit (cam gear and cans R1/R2 assembly), gear unit and drive unit, align the position of the pawl "x" on the drive unit to that of the notch on the cam gear "q". Then, make sure that the gear unit is engaged by turning the cam gear "q" (See Fig. 24).

Slit washer

Cam gear q

Slit washer

Cam R2

Pawl

Cam R1

Cam switch board

C.G. base assembly

Pawl

Notch

Pawl

Cylinder gear

Drive unit

Fig.22

Cam gear q

Cam R1, R2 assembly

Gear unit

Gear bracket

Fig.23

1-20

HX-Z1

Removing the playback / recording & eraser head (See Fig. 1 ~ 3)

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).

When the flywheel (R) is rotated in counterclockwise direction, the playback / recording & eraser head will be turned in counterclockwise direction from the position in Fig. 2 to that in Fig. 3.

At this position, disconnect the flexible P.C. board (outgoing from the playback / recording & eraser head) from the connector CN31 on the head amplifier & mechanism control P.C. board.

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

Remove the spring a from behind the playback / recording & eraser head.

Head mount

Flexible board

Cassette mechanism

Flywheel (R)

Trigger arm

Fig. 1

Playback / recording & eraser head

Spring a

Trigger arm

Loosen the reversing azimuth screw retaining the playback / recording & eraser head.

Take out the playback / recording & eraser head from the front of the head mount.

The playback / recoring & eraser head should also be removed similarly according to steps 1 to 7 above.

Reassembling the playback / recording & eraser head (See Fig.2, 3)

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

Fix the reversing azimuth screw.

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.

The playback / recording & eraser head should also be reassembled similarly to step 1 to 4 above.

CN31

Head amplifier & mechanism control P.C. board

Fig. 2

Playback / recording & eraser head

Spring 1

Head amplifier & mechanism control P.C. board

Fig. 3

Flywheel (R)

Reversing azimuth screw

Head mount

Flexible board

1-21

HX-Z1

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

Remove the cassette mechanism assembly.

After turning over th cassette mechanism assembly, remove the three screws A retaining the head amplifier & mechanism control board.

Disconnect the connector CN32 on the board including the connector CN1 on the reel pulse P.C. board.

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

Removing the main motor assembly

(See Fig.4 ~ 6)

Remove the two screws B retaining the main motor assembly (See Fig. 4 and 4a).

While raising the main motor, remove the capstan belt from the motor pulley (See Fig. 4a).

Head amplifier & mechanism control board

Flexible board

Capstan belt

CN32

CN31

Main motor assembly

Belt

Main motor assembly

4pin parallel wire

Main motor assembly

Fig. 4

CAUTION:

Capstan belt

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.

Mechanism motor assembly

Motor pulley

Fig. 5

Main motor assembly

Flywheel

Capstan belt

Motor pulley

Fig. 4a

Motor pulley

Fig. 6

1-22

Removing the flywheel (See Fig. 7, 8)

Remove the head amplifier & mechanism control P.C. board.

Remove the main motor assembly.

After turning over the cassette mechanism, remove the two slit washers and fixing the capstan shafts R and L, and pull out the flywheel (R) and (L) respectively from behind the cassette mechanism.

HX-Z1

Flywheel (R) Flywheel (L)

Flywheel R Flywheel L

Fig. 8

Removing the reel pulse P.C. board and solenoid (See Fig. 9)

Remove the five pawls a to e reattaining the reel pulse board.

From the surface of the reel pulse board parts, remove the two pawls f and g retaining the solenoid.

a b c d e

Solenoid

Capstan shaft (R)

Slit washer

Capstan shaft (L)

Slit washer

Fig. 7

Reel pulse board

Fig. 9

1-23

HX-Z1

Adjustment method

Measurement Instruments Required for

Adjustment

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

2. Attenuator impedance : 600

3. Electronic voltmeter

4. Distortion meter

5. Frequency counter

6. Wow & flutter meter

7. Test tape VTT703L : Head azimuth VT712 : Tape speed and running unevenness (3kHz) VT724 : Reference level (1kHz)

8. Blank tape TYPE : AC-225 TYPE : AC-514

9. Torque gauge : For play and back tension FWD(TW2111A), REV(TW2121a) and FF/REW(TW2231A)

10. Test disc: CTS-1000

Measurement conditions

Power supply voltage AC120V (60Hz) : Ver.J,C Reference output : Speaker : 0.775V/4 : Headphone : 0.077V/32 Reference frequency and input level ------------------------------ 1kHz, AUX : -8dBs Measurement output terminal ------- at Speaker J3002 Load resistance --------------------------- 4

Radio Input signal

AM frequency --------------------------------------- 400Hz AM modulation ---------------------------------------- 30% FM frequency --------------------------------------- 400Hz FM frequency deviation ------------------------ 22.5kHz

Tuner section

FM Band cover: 87.5 108MHz MW Band cover: 522 1,629kHz LW Band cover: 144 288kHz Voltage applied to tuner +B : DC5.7V VT : DC 12V Reference measurement output 26.1mV(0.28V)/3 Input positions AM : Standard loop antenna FM : TP1 (hot) and TP2 (GND)

Standard measurement position of volume

Function switch to Tape Beat cut switch to Cut Super Bass/Active hyper Bass to OFF Bass Treble to Center Adjustment of main volume to reference output VOL : 28

Precautions for measurement

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

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

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

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

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

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

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

8. For connecting a dummy resistor when measuring the output, use the wire with a greater code size.

9. Whenever any mixed tape is used, use the band pass filter (DV-12).

1-24

Arrangement of Adjusting Position

HX-Z1

Cassette mechanism section

Head azimuth adjusting screw (Forward side)

Cassette AMP board

VR37

C308

R314

MOTOR SPEED

VR37

L301

B155

VR31

BIAS ADJ

VR31

Head azimuth adjusting screw (Reverse side)

PBRAGPBL

RECRAGRECL

SW8V

CN34

C307

R313

C310

R315

C314

Q302

R327

C317

C319

C221

B112

C313

C121

L303

C316

R310

R335

B198

R353

Q305

C106

Q103

R305

R303

R122

Q101

C103

B163

Q321

R221

B156

C303

R115

B157

R108

R101

C113 R110 R109

R102

C110

C108

C104

R301

R121

C107

B151

R112 R111

C102

R107

B152

C302

R103 1

C301

C111

B164

C306

Cassette mechanism section (Back side)

Head azimuth adjusting screw (Forward side)

Playback/Recording & eraser head

R304

C109

B158

B106

C101

B166

R116

R212 R211 C211

R216

IC32

C201

B101

CN33

B109B108

C209

R342

C213 R210 R209

C207

B159

B102

R341

C208

R207

B200

B110

CN31

R208

R340

R205

R105 C105

B160

R343

C305

C206

R345

R201

1IC31

B113

TAP

C304

C202

C210

Q331

RRE

SOL

C375

C205

R215

C203

B161

R339 C334

R106

R206

R204

R203

B153

R104

R222

C204

B168

PHO5VMG

R202

C333

C332

R375

Q201

PLA

C331

Q372

Q203

R331

FRE

B167

R371

C376

70u

Q375

CN32

R376

R372 R373

B162

C371

C374

R338

D375

Q376

Q371

R337

R336

IC33

Head azimuth adjusting screw (Reverse side)

1-25

HX-Z1

Tape Recorder Section

Items

Confirmation of head angle

Measurement conditions

Test tape : VTT703L (8kHz) Measurement output terminal : Speaker terminal Speaker R (Load resistance: 4 ) : Headphone terminal

Measurement method

1 Playback the test tape VTT703L (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 performed in both the forward and reverse directions with the head azimuth screw.

Confirmation of tape speed

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

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.

Reference Values for Confirmation Items

Standard Values

Maximum output

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

Adjusting positions

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

VR37

Items

Difference between the forward and reverse speed

Measurement conditions

Test tape : VT712 (3kHz) Measurement output terminal : Speaker terminal Speaker R (Load resistance: 4 ) Measurement output terminal : Headphone

Wow & flutter Test tape

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

Measurement method

Standard Values

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).

6.0Hz or less

0.25% or less (WRMS)

Adjusting positions

Head azimuth screw

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