JVC NXMD-1, NXMD-1-R Service manual

NX-MD1R/NX-MD1

SERVICE MANUAL

COMPACT COMPONENT MD SYSTEM

NX-MD1R / NX-MD1

SP-NXMD1 CA-NXMD1R/CA-NXMD1 SP-NXMD1

Area suffix [NX-MD1R]

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

	Area suffix [NX-MD1]
A ------------------------	Australia
US --------------------	Singapore
UB -------------------	Hong Kong
UP --------------------------	Korea

Contents

Safety precautions	1-2
Preventing static electricity	1-3
Important for laser products	1-5
Disassembly method	1-6
Adjustment method
(CD/MD section)	1-32
Flow of functional operation until
TOC read (CD)	1-37

Flow of functional operation until
			TOC read (MD)	1-38
Maintenance of laser pickup (CD)				1-39
Replacement of laser pickup (CD)				1-39
Maintenance of laser pickup(MD)				1-40
Replacement of laser pickup(MD)				1-40
Description of major ICs				1-41~68

No.21041

COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.

Oct. 2001

NX-MD1R/NX-MD1

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.

AC VOLTMETER

Measure the AC voltage across the resistor with

the AC

(Having 1000

voltmeter.

ohms/volts,

Move the resistor connection to each exposed metal part,

or more sensitivity)

particularly any exposed metal part having a return

path to

0.15 F AC TYPE

the chassis, and meausre the AC voltage across the resistor.

Now, reverse the plug in the AC outlet and repeat each

Place this

measurement. Voltage measured any must not exceed 0.75 V

probe on

each exposed

AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).

1500

10W

metal part.

Good earth ground

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.

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

1-2

NX-MD1R/NX-MD1

Preventing static electricity

1. Grounding to prevent damage by static electricity

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

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

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

2-1 Ground the workbench

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

2-2 Ground yourself

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

(caption)

Anti-static wrist strap

Conductive material

(conductive sheet) or iron plate

3. Handling the optical pickup

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.Remove solder of the shorting round on the flexible wire after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector.

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

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

1-3

NX-MD1R/NX-MD1

5. Attention when MD traverse unit is decomposed

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

1.Short the shorting round before the flexible wire is removed from connector CN321 on the MD servo board as shown in Figure.

(When the wire is removed without putting up solder, the MD pick-up assembly might destroy.) 2.Please remove solder after connecting the flexible wire with when you install picking up in the substrate.

MD servo control board

CN321

Pickup

Shorting round

6. Attention when CD traverse unit is decomposed

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

1.Short the shorting round before the flexible wire is removed from connector CN601 on the CD servo board as shown in Figure.

(When the wire is removed without putting up solder, the CD pick-up assembly might destroy.) 2.Please remove solder after connecting the flexible wire with when you install picking up in the substrate.

CD servo board

Shorting round

CN601

1-4

NX-MD1R/NX-MD1

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.

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.

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.

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

CLASS 1

LASER PRODUCT

1-5

NX-MD1R/NX-MD1

Disassembly method

<Main body section>

Removing the top cover

(See Fig.1 and 2)

1.Remove the four screws A attaching the top cover from the back side of the main body.

2.Remove the two screws B attaching the top cover from the both sides of the main body.

3.Remove the top cover from the main body while lifting up the back side of the top cover.

A

Top cover

Removing the rear cover (See Fig.3)

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

1.Remove the nine screws C attaching the rear cover from the back side of the main body.

2.Set the speaker and antenna terminals to the locked condition.

3.Disengage the claws a of the rear cover from the chassis and remove the cover toward the rear.

A

Fig.1

Top cover

B Fig.2

Antenna terminal

Rear cover

C C

Claw a	Claw a
	Speaker terminal
	Fig.3

1-6

Removing the system control board (See Fig.4)

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

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

1.Remove the screw D attaching the card wire support board, then remove the card wire support board.

2.Disconnect the card wires from connectors CN602 and CN605 on the system control board.

3.Remove the two screws E and screw F attaching the system control board.

4.Disconnect connectors CN603 and CN604 on the system control board from the connector CN693 on the regulator board and the CN694 on the repeater board respectively.

5.Disconnect the wire from connector CN601 on the system control board.

Removing the main amplifier board (See Fig.5 and 6)

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

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

1.Disconnect the card wires from connectors CN661, CN695 and CN511 on the main amplifier board.

2.Remove the protector, then remove the screws G attaching the main amplifier board.

3.Remove the screw H and screw I attaching the main amplifier board.

4.Remove the screw J attaching the heat sink from the back side.

5.Disengage claw b on the heat sink and disconnect the connectors CN901 and CN904 on the main amplifier board, from connector CN991 on the repeater board and connector CN994 on the regulator board respectively.

6.Disconnect the wire from connector CN301 on the main amplifier board.

	NX-MD1R/NX-MD1
Card wire support board	CN605
CN602
CN603

F

CN601

CN604

	System control board
			E		D			E
				Fig.4
	CN695		CN511		CN661			Protector
								CN904

Main amplifier board

CN901 I CN301 H	G
Fig.5
Regulator board

Claw b

J

Fig.6

1-7

NX-MD1R/NX-MD1

Removing the regulator board

(See Fig.7)

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

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

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

Prior to performing the following procedure, remove the main amplifier board.

1.Remove the two screws K and two screws L attaching the regulator board.

2.Disconnect the wires from connectors CN903 and CN995 on the regulator board.

Removing the AC jack board

(See Fig.8)

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

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

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

Prior to performing the following procedure, remove the main amplifier board.

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

1.Remove the screw M attaching the AC jack board.

2.Disconnect the wire from connector CN921 on the AC jack board.

K

CN903	CN995

Regulator board

L

Fig.7

		M
	AC jack
CN921	board

Voltage LF901 F9001

Selector

Fig.8

1-8

Removing the MD mechanism assembly (See Fig.9)

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

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

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

Prior to performing the following procedure, remove the main amplifier board.

1.Remove the two screws N and two screws P attaching the MD mechanism assembly.

(Caution) When assembling, attach the screws N at the point c so that it also fixes the earth wire.

2.Disconnect the card wire from connector CN512 on the repeater board.

3.Disengage the hook d from the MD mechanism assembly and lift the rear of the assembly to remove it.

Removing the fan motor assembly and fan motor (See Fig.10 and 11)

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

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

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

Prior to performing the following procedure, remove the main amplifier board.

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

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

1.Remove the four screws Q attaching the fan motor assembly from the both sides of the sub chassis.

2.Remove the fan motor assembly to the top side.

3.Remove the two screws R attaching the fan motor, then remove the fan motor.

(Caution)When assembling, attach the screws R so that they also fix the shield together with the fan motor assembly.

NX-MD1R/NX-MD1

N

	Earth wire
CN512	Point c
P	MD mechanism
	assembly
	Hook d

			Fig.9
Fan motor	Q		QQ			Q
assembly

Sub chassis

Shieid

Fig.10

R

Fan motor

Fig.11

1-9

NX-MD1R/NX-MD1

Removing the power board

(See Fig.12)

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

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

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

Prior to performing the following procedure, remove the main amplifier board.

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

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

Prior to performing the following procedure, remove the fan motor assembly.

1.Remove the four screws S attaching the power board from the left and right side of the sub chassis.

2.Disconnect the wire from connector CN921 on the AC jack board.

3.Remove the power board in an upward direction.

Removing the repeater board

(See Fig.12)

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

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

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

Prior to performing the following procedure, remove the main amplifier board.

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

1.Remove the two screws T attaching the repeater board.

2.Disconnect the card wire from connector CN691 on the repeater board.

(Caution) When assembling, fit the two claws of the sub chassis into the two rectangular holes e of the repeater board, before attaching it.

T

S

S

Power board

Repeater board

Clow e

CN691

Sub chassis

Claw e

CN921

Fig.12

1-10

Removing the CD mechanism assembly (See Fig.13 and 14)

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

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

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

Prior to performing the following procedure, remove the main amplifier board.

Prior to performing the following procedure, remove the AC jack board.

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

1.Remove the four screws U attaching the sub chassis from the left and right side of the bottom chassis.

Remove the screw V attaching the sub chassis.

2.Disconnect the card wire from connector CN691 on the repeater board.

3.Remove sub chassis cover with regulator board and fan motor assembly in the direction of the arrow.

4.Remove the three screws W attaching the CD mechanism assembly.

5.Disconnect the card wire from connector CN606 on the CD servo board.

6.Remove the CD mechanism assembly while lifting the rear part of it.

NX-MD1R/NX-MD1

Fun motor assembly

Regulator board

	CN691
	U CN606	Sub chassis	V
	U

Fig.13

W W

CD mechanism assembly

W

Fig.14

1-11

NX-MD1R/NX-MD1

Removing the front panel assembly (See Fig.15)

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

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

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

Prior to performing the following procedure, remove the main amplifier board.

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

1.Remove the two screws X attaching the front panel assembly from bottom side of the bottom chassis.

2.Release the three claws f on the bottom side of the main body using screwdriver, and detach the front panel assembly toward the front.

Front panel assembly

Claw f

Bottom chassis

X

Fig.15

1-12

<Front panel assembly section>

Prior to performing the following procedure, remove
the front panel assembly.	MD bracket

Removing the front board (See Fig.16)

1.Remove the two screws Y attaching the MD bracket.

2.Remove the MD bracket.

(Caution) When assembling, fit the rib of the front panel into the location hole g on the MD bracket before attaching it.

3.Remove the eight screws Z attaching the front board.

4.Remove the front board.

(Caution) When assembling, fit the rib of the front panel into the location hole h on the front board before attaching it.

Location hole g

Y

Location hole h

Z

Z

Removing head phone & USB board (See Fig.16)

1.Remove the wire from two wire holders i.

2.Remove the two screws AA attaching the head phone & USB board.

3.Remove the head phone & USB board.

NX-MD1R/NX-MD1

Z

Location hole g

Front board

Location hole h

Wire holder i

Wire holder i

AA

Head phone & USB board

Fig.16

1-13

NX-MD1R/NX-MD1

<MD mechanism assembly section>

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

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

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

Removing the MD mechanism assembly (See Fig.17)

1.Remove the screw AB attaching the earth plate board.

2.Remove the card wire on the MD mechanism assembly.

3.Disconnect the card wire from connector CN522 on the MD servo board, then remove it.

4.Remove the four screws AC attaching the MD bracket from left and right side of the MD mechanism assembly.

5.Remove the MD bracket to the bottom side.

			Earth plate board
AB AC				AC
					Card wire

Card wire

CN522

MD bracket

Fig.17

1-14

NX-MD1R/NX-MD1

<Speaker section>

Joints a

Note : Avoid replacing individual parts.

Removing the front cover (See Fig.1 to 3)

1.Pull out the saran net toward the front while disengaging the four joints a.

2.Insert the tip of a flat-bladed screwdriver or a similar tool into the joints b between the main body and the front cover from the bottom of the main body.

3.Lift the front cover little by little to remove.

4. Remove the front cover toward the front and	Saran net
disconnect the yellow and black wires from the two
tweeter speaker terminals.

Joints a

Fig.1

Joints b

Front cover

Tweeter speaker

Front cover

Fig.3

Fig.2

1-15

NX-MD1R/NX-MD1

Removing the woofer speaker (See Fig.4)

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

1.Remove the four screws A on the front of the body.

2.Pull out the woofer speaker toward the front and disconnect the wire (yellow and black,blue and black) from the two speaker terminals.

A							A

Woofer speaker

Fig.4

	Removing the tweeter speaker	B
	(See Fig.5)
	Prior to performing the following procedure, remove
	the front cover.
1. Remove the two screws B attaching the tweeter
	speaker on the back of the front cover.

Tweeter speaker

Front cover

Fig.5

1-16

<CD Mechanism Assembly>

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

1.Remove the two screws A fastening the CL. base assembly from the top of the CD mechanism assembly.

2.Move the CL. base assembly diagonally upwards as indicated by the arrow to release it from the two hooks a.

3.Turn the idle gear in the arrow-marked direction from the upper side of the CD mechanism assembly. Accordingly, the TRAMECHA assembly moves downwards.

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

4. Draw out the tray frontwards for removing it.

Note: When reinstalling the tray:

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

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

Idle gear

Tray gear

Hook d

Hook e

Tray

Fig. 5

NX-MD1R/NX-MD1

A	CL. base assembly
	Hook a
	A	Hook a

Fig. 1

Idle gear

TRAMECHA assembly

Tray

Fig. 2

TRAMECHA assembly

Idle gear

Tray

Fig. 3

Part c

Tray gear

Part b

Fig. 4

1-17

NX-MD1R/NX-MD1

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.)

B B

Idle gear

TRAMECHA assembly

Tray gear

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.

Part g B

Fig. 6

Tray gear

Part f

L. base assembly

Fig. 7

Spring

Part g

Fig. 8

Spring

Groove of CH. base assembly

Fig. 9

1-18

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		Soldered
from the pickup from the connector, be sure to
		part h
solder its shorting round.
If the flexible wire is connected without		C
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.

NX-MD1R/NX-MD1

Flexible wire

C

Shorting round

CN601 on mechanism P.C. board

C

Soldered part i

Fig. 10

1-19

NX-MD1R/NX-MD1

Removing the Pickup

(Refer to Figs. 11 to 14.)

Remove the CL. base assembly and tray.

Remove the TRAMECHA assembly.

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

Note: Before disconnecting the flexible wire coming from the pickup from the connector, be sure to solder its shorting round.

If the flexible wire is connected without soldering, it may cause breakdown of the pickup.

1.Solder the shorting round of the flexible wire connected with the mechanism P.C. board from the back of the TRAMECHA assembly.

2.Disconnect the flexible wire from the connector CN601 on the mechanism P.C. board.

3.Turn the idle gear in the arrow-marked direction from the top of the TRAMECHA assembly so that the pickup assembly is shifted to the reverse side of the T-T assembly.

Move the pickup assembly until the part j of the rack plate in the lower part of the pickup assembly comes out of the CH. base assembly.

4.Remove the two screws D retaining the shaft of the pickup assembly. Next, disengage the hook k from the CH. base assembly and then remove the pickup assembly together with the shaft.

5.Pull the shaft out of the pickup.

6.Remove the two screws E fastening the rack plate from the pickup.

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

Flexible wire

Shorting round

CN601 on mechanism P.C. board

Fig. 11

CH. base

assembly T-T assembly

Part j of

Pickup assembly

rack plate

Idle gear

Fig. 12

D	Pickup assembly

Part k

CH. base assembly

D

Fig. 13

Shaft	Pickup

Part j

P.S. spring

Rack plate

F

E

Fig. 14

1-20

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	Part I
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.

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 G fastening the feed motor assembly from the top of the mechanism assembly.

NX-MD1R/NX-MD1

Part k

Part j

Pickup assembly

CH. base assembly

Fig. 15

Part m	Middle gear

Part n

Rack plate

Fig. 16

G

Feed motor assembly

Fig. 17

1-21