B ------------------------------ U.K.
E ---------- Continental Europe
EN ----------- Northern Europe
Area suffix [NX-MD1]
A ------------------------ Australia
US -------------------- Singapore
UB ------------------- Hong Kong
UP -------------------------- Korea
CA-NXMD1R/CA-NXMD1 SP-NXMD1SP-NXMD1
Safety precautions
Preventing static electricity
Important for laser products
Disassembly method
Adjustment method
(CD/MD section)
Flow of functional operation until
TOC read (CD)
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
1-2
1-3
1-5
1-6
1-32
1-37
Flow of functional operation until
TOC read (MD)
Maintenance of laser pickup (CD)
Replacement of laser pickup (CD)
Maintenance of laser pickup(MD)
Replacement of laser pickup(MD)
Description of major ICs
1-38
1-39
1-39
1-40
1-40
1-41~68
No.21041
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.
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.
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.
*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. *Please refer to "Disassembly method" in the text for pick-up and how to detach the substrate.
1.Short the s
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.
horting round
before the flexible wire is removed from connector CN601 on the CD servo board
CD servo board
1-4
Shorting round
CN601
Important for laser products
NX-MD1R/NX-MD1
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
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.
Removing the rear cover (See Fig.3)
Prior to performing the following procedure, remove
the top cover.
Fig.1
A
Top cover
A
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.
C
B
Fig.2
Antenna terminal
Rear cover
C
1-6
Claw a
Claw a
Speaker terminal
Fig.3
NX-MD1R/NX-MD1
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.
Card wire support board
CN603
System control board
CN695
E
Fig.4
CN511
CN602
D
CN661
CN605
F
CN601
CN604
E
Protector
CN904
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.
CN901
CN301
Regulator board
HI
Fig.5
Main
amplifier
board
G
Claw b
6.
Disconnect the wire from connector CN301 on the
main amplifier board.
J
Fig.6
1-7
NX-MD1R/NX-MD1
k
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.
CN903
Regulator
board
K
CN995
L
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.
CN921
Voltage
Selector
LF901
Fig.7
M
AC jac
board
F9001
1-8
Fig.8
NX-MD1R/NX-MD1
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.
CN512
P
Fan motor
assembly
N
Q
Fig.9
Q
Q
Earth wire
Point c
MD mechanism
assembly
Hook d
Q
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.
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.
T
S
S
Power board
Repeater
board
Clow e
CN691
Sub chassis
Claw e
CN921
Fig.12
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.
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.
CN691
U
CN606
Sub chassis
U
NX-MD1R/NX-MD1
Fun motor assembly
Regulator
board
V
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.
Fig.13
WW
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
X
Claw f
Fig.15
Bottom chassis
1-12
<Front panel assembly section>
NX-MD1R/NX-MD1
Prior to performing the following procedure, remove
the front panel assembly.
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.
MD bracket
Location hole g
Y
Location hole h
Z
Z
Z
Location hole g
Front board
Location hole h
Wire holder i
Wire holder i
AA
Head phone & USB board
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.
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.
Card wire
CN522
Earth plate board
ACACAB
Card wire
MD bracket
Fig.17
5.
Remove the MD bracket to the bottom side.
1-14
NX-MD1R/NX-MD1
<Speaker section>
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
disconnect the yellow and black wires from the two
tweeter speaker terminals.
Joints a
Saran net
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
Woofer speaker
A
Fig.4
Removing the tweeter speaker
(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.
B
Tweeter speaker
1-16
Front cover
Fig.5
NX-MD1R/NX-MD1
<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.
CL. base assembly
A
TRAMECHA
assembly
Hook a
Fig. 1
A
Hook a
Idle gear
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
Tray
Fig. 2
TRAMECHA assembly
Idle gear
Tray
Fig. 3
Hook d
Hook e
Tray
Tray gear
Part c
Part b
Fig. 4Fig. 5
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.)
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
B
Part g
L. base assembly
B
Fig. 6
Fig. 7
B
Idle gear
Tray gear
Tray gear
Part f
1-18
Spring
Part g
Fig. 8
Spring
Groove of CH. base assembly
Fig. 9
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.
NX-MD1R/NX-MD1
Flexible wire
C
Shorting round
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.
Soldered
part h
C
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.
CH. base
assembly
Part j of
rack plate
Flexible wire
Shorting round
CN601 on
mechanism
P.C. board
Fig. 11
T-T assembly
Pickup assembly
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.
D
Idle gear
Shaft
Fig. 12
Pickup assembly
Part k
CH. base
assembly
D
Fig. 13
Pickup
1-20
Part j
Rack plate
P.S. spring
F
E
Fig. 14
NX-MD1R/NX-MD1
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.
Part I
Part j
Part m
Part k
Pickup
assembly
CH. base
assembly
Fig. 15
Middle gear
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.
Rack plate
Part n
Fig. 16
G
Feed motor assembly
Fig. 17
1-21
NX-MD1R/NX-MD1
<MD mechanism section>
Removing the MD servo board
(See Fig.1 and 2)
1.
Turn over the body and disconnect the card wires
from connectors CN408, CN521 and the flexible wire
from CN407 on the MD servo board.
2.
Remove the two screws A attaching the main board.
Slide the MD servo board in the direction of the
arrow to release the two joints a with the single
flame.
3.
Shorting round b on the pickup in the body.
Disconnect the flexible harness from connector
CN321 and CN451 on the underside of the MD servo
board. Then remove the MD servo board.
CN521
(Bottom side)
Joint a Joint a
Fig.1
CN451
AA
MD servo board
CN408
CN407
MD servo board
CN321
Removing the mechanism cover
(See Fig.3)
1.
Remove the four screws B on both sides of the
mechanism cover.
2.
Remove the screw B' on the earth wire of the
mechanism cover.
3.
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.
1-22
Joint c
Hook
Joint c
B
Pickup
Fig.2
Fig.3
Shorting round b
B'
Earth wire
Mechanism cover
B
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
Fig.5
NX-MD1R/NX-MD1
Head lifter
Fig.4
Spring
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
Head assembly
Fig.7
C
1-23
NX-MD1R/NX-MD1
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 MD servo board, the mechanism cover, the head
lifter and the head assembly.
1.
Remove the two screws D and screw 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.
D
D
Loading assembly
3.
Remove the traverse mechanism assembly from the
single flame.
Joint d
Earth wire
D'
Fig.8
Loading assembly
Traverse mechanism
assembly
1-24
Single flame
Fig.9
NX-MD1R/NX-MD1
<Loading assembly section>
Removing the slide base (L) / (R)
(See Fig.10)
1.
Remove the two screws E on the top 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.
Removing the loading mechanism
assembly (See Fig.11)
1.
Detach the loading mechanism assembly upward to
release the four pins on both sides from the loading
motor, paying attention to the part e of the loading
mechanism base.
Slide base (R)
Boss e'
E
Slide base (L)
E
Boss e'
Fig.10
Part e
Loading motor assembly
<Loading mechanism assembly section>
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 release the joint f.
3.
Remove the belt from the loading motor assembly.
4.
Remove the slit washer to the cam gear.
5.
Remove the two screws G attaching the loading
motor.
Removing the cam gear and the cam
switch board (See Fig.12)
F
Loading mechanism
assembly
Joint f
CN612
Loading mechanism base
Fig.11
Wire holder
H
Cam switch board
Slit washer
H
Cam gear
Fig.12
Loading motor
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 connector CN612 on the cam switch board.
3.
Remove the two screws H and the clamp. Remove
the cam switch board.
G
Belt
Fig.13
1-25
NX-MD1R/NX-MD1
Removing the cartridge holder assembly
(See Fig.14 and 15)
1.
Remove the two screws J on the top side of the
loading assembly.
J
J
Removing the slide bar and the eject bar
(See Fig.14 and 15)
Prior to performing the following procedure, remove
the cartridge holder assembly.
Slide bar
Cartridge holder assembly
Eject bar
Eject bar
Part g
Fig.14
J
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.
Slide bar
Boss k
Eject bar
UD base
1-26
Cartridge holder assembly
Fig.15
<Traverse mechanism assembly section>
NX-MD1R/NX-MD1
Removing the Insulators (See Fig.16)
1.
Disengage the four insulators from the notches of the
traverse mechanism chassis.
Removing the pickup unit (See Fig.17)
1.
Turn over the traverse mechanism assembly and
remove the screw K attaching the shaft holder (F).
2.
Move the shaft inward and remove it from the shaft
holder (R).
Pickup unit
Insulators
Insulators
Traverse machanism chassis
Fig.16
Joint h
Pickup guide
Pickup unit
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.
Removing the pickup (See Fig.18)
1.
Draw out the shaft from the pickup.
2.
Remove the two screws L attaching the rack spring.
Shaft holder (F)
Rack spring
Shaft holder (R)
K
Fig.17
L
Pickup
Fig.18
Shaft
1-27
NX-MD1R/NX-MD1
Removing the feed motor assembly
(See Fig.19, 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.
Traberse mechanism board Soldering j
N
2.
Remove the two screws M attaching the feed motor
assembly.
3.
Remove the two screws P attaching the feed motor
bracket.
Removing the traverse mechanism
board (See Fig.19)
Prior to performing procedure, remove the feed
motor assembly.
1.
For the red and black harnesses extending from the
spindle motor, unsolder the soldering j on the
traverse mechanism board.
Soldering i
Feed motor assembly
M
Fig.19
Feed motor
Feed motor bracket
P
2.
Remove the screw N attaching the traverse
mechanism board.
Fig.20
1-28
<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 ditch k'. (Fig.21)
3.
Slide the slide bar and the eject bar in the direction
of the arrow in Fig.21 and reattach the cartridge
holder assembly using the two screws J.
(Fig.21 and 22)
NX-MD1R/NX-MD1
ATTENTION:
Make sure the pin of the eject lever
marked m is fitted to the slot of the
eject bar marked n 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
J
J
Ditch k'
Eject bar
Cam switch board
q
r
Cam switch boss
Boss k
UD base
Fig.21
H
Point marked
H
Ditch n
UD base (Bottom)
Cartridge holder assembly
Loading slider
Eject lever
m
Fig.22
1-29
NX-MD1R/NX-MD1
4.
Reattach the wire holder to the UD base while
engaging the UD base hook marked r to the wire
holder slot marked q (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(part p) of the eject lever 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)
Slide barCN612
Loading motor assembly
Point marked
Wire holder
Boss
Cam switch
Cam switch board
1-30
F
Eject lever
Fig.23
Cam gear
p
Cam gear
(Triangle mark)
Eject lever
NX-MD1R/NX-MD1
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)
9.
Reattach the slide base (R) while fitting the two pins
on another side of the UD base to the slots of the
slide base (R). (Fig.25)
ATTENTION:
Fit the part s of the slide base (R) to
the part t on the inward side of the
cam gear rib. (Fig.26)
10.
Reattach the slide base (L) on the slide base (R)
while fitting 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)
Ref:
To expedite the work, bring up the UD base
slightly when fitting each pin to the appropriate
notch.
Hook e
Hook e"
Hook e"
Pin
Loading mechanism base
Fig.24
Slide base (R)
Part s
E
Pin
Boss e'
Pin
Slide base (L)
Pin
Part t
Fig.25
Slide base (L)Slide base (R)
Slide base (R)
Cam gear
E
Part s
Part t
Boss e'
Fig.26Fig.27
1-31
NX-MD1R/NX-MD1
Adjustment Method (CD/MD section)
1. Jigs and test instruments
Laser power meter
Laser power meter sensor (or disk sensor)
Premastered disk (MRG-1018 or TGYS1)
Recordable disk (MDW-74/AU1)
2. CD check method
Remove the four screws retaining the top cover from the rear panel and the two screws retaining it from
1.
the left and right side panels.
Remove the two screws retaining the front cover from the rear side and the two screws retaining it from
2.
the bottom panel.
Remove the eight screws retaining the rear cover.
3.
Remove the four screws retaining the sub chassis from the left and right sides.
4.
(Caution)
3.
USB input check method
Connect the PC to the USB port and ensure that audio is output from the speakers.
(Compatible with Windows 98, Windows 2000 and Windows Me)
For details of the removal, see the previous
section "Disassembly method".
CD mechanism assembly
System control board
1-32
Connect to the USB port
of the PC.
USB audio terminal
4. Adjustment and check items
1) CD section
(1) Indication of the C1 error
(2) Cancel of the C1 error indication
2) MD section
(1) Setup of the TEST MODE 1
(2) Initialization of the EEPROM
(3) Adjustment of the laser power
(4) Adjustment of the disk
(5) Setup of the TEST MODE 2
(6) Indication of variation in the pickup adjustment value
(7) Indication of the C1 error
(8) Cancel of the TEST MODE
5. Adjustment and check method
1) CD section
(1) Indication of the C1 error
While pressing both the STOP key
and CD PLAY key on the main
unit,turn on the primary power supply.
NX-MD1R/NX-MD1
Press the STANDBY/ON key
on the main unit
FL indication
CD TEST
Press the CD OPEN/CLOSE key
and insert the test disk.
Press key 1, 2 or 4 of the remote control
unit to start measurement. The number of
error corrections will be displayed every 10
seconds.
To cancel the C1 error indication, cut off the power supply.
1-33
NX-MD1R/NX-MD1
2) MD section
(1) Setup of the TEST MODE 1
While pressing both the STOP key
and MD PLAY key, turn on the
primary power supply.
Press the STANDBY/ON key on
the main unit
FL indication
MD TEST MODE 1
Setup is complete.
(3) Adjustment of the playback laser power
Insert the laser power
meter sensor.
(2) Initialization of the EEPROM
(The EEPROM can be initialized on the precondition that the
setup of the TEST MODE 1 is complete. After setup of the
TEST MODE 1, proceed to the following operations with the
remote controller*.)
* For EJECT operation, use the EJECT key on the main unit.
Initialization of the EEPROM
Press the REC SPEED key
on the remote controller.
FL indication
DATA INITI.
Setup is complete.
Press the "2" key on
the remote controller.
FL indication
L.POW PLAY
Set up the playback
laser power.
Increase the laser
power with the
F.SKIP key on the
remote controller.
Adjust the power to be 0.68 mW or
more. If the value exceeds 0.68 mW,
approximate it to 0.68 mW as
accurately as possible.
Press the STOP key on
the remote controller.
Decrease the laser
power with the
B.SKIP key on the
remote controller.
Press the "4" key on
the remote controller.
FL indication
L.POW REC
Set up the recording
laser power.
Increase the laser
power with the
F.SKIP key on the
remote controller.
Adjust the power to be 6.23 mW or
more. If the value exceeds 6.23 mW,
approximate it to 0.68 mW as
accurately as possible.
Press the STOP key on
the remote controller.
Decrease the laser
power with the
B.SKIP key on the
remote controller.
Press the STANDBY/ON key on the
main unit or remote controller.
Cut off the power supply after
cancelling the TEST MODE.
1-35
NX-MD1R/NX-MD1
For investigating the mode in which an error
occurred during the disk adjustment, freeze the
set in the mode by pressing the proper key
(refer to the table on the right) on the remote
controller before cancelling the TEST MODE 1.
(5) Setup of the TEST MODE 2
While pressing both the STOP key and
MD PLAY key on the main unit,turn
on the primary power supply.
FL indication
MD TEST MODE 1
Press the STANDBY/ON key
on the main unit
While pressing the STOP key on the main
unit, press the MD EJECT key on the
main unit double.
The TEST MODE 2 is set up.
(6) Indication of variation in the pickup adjustment value
Set up the TEST MODE 2.
Press the "6" key on the
remote controller.
FL indication*
XXXXX - XXXX
Press the "8" key on the remote controller. Counting of
number of C1 errors starts and it continues until it
counts up the maximum number of C1 errors with
indication (maximum number of error indication is 432).
ASG
TRG
TRB
FOB
FGR
FEXP
FGC
FG
TGR
TEXP
TGC
TG
Each time the "6" key on the remote controller is
*
-1
-2
:
-128
127
126
:
1
0
pressed, the indication changes from ASG to TRG,
from TRG to TRB, and so on as shown in the figure.
(7) Indication of the C1 error
Set up the TEST MODE 2.
Press the MD EJECT key
and insert the MD test disk.
FL indication*
200 Hz or less
X X Y Y Z Z
(8) Cancel of the TEST MODE
(The cancel operation is common to the TEST
MODE 1 and 2.)
Press the STANDBY/ON key
Cut off the primary power supply
after cancelling the TEST MODE
1-36
Flow of functional operation until TOC read (CD)
Check Point
Power ON
Play Key
Slider turns REST
SW ON.
Automatic tuning
of TE offset
Laser ON
Detection of disc
Automatic tuning of
Focus offset
Confirm that the voltage at the pin32
of IC251 is "H"\"L"\"H".
NX-MD1R/NX-MD1
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 20 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
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
Automatic tuning of
Focus error balance
Automatic tuning of
Focus error gain
Confirm that the Focus error
S-cuve signal at the pin28 of
IC651 is approx.2Vp-p
Confirm that the signal from
pin24 IC651(R808) is 0V as
a accelerated pulse during
approx.400ms.
Confirm the waveform of
the Tracking error signal.
at the pin 20 of IC601 (R604)
(See fig-1)
Automatic tuning of
Tracking error gain
TOC reading
Play a disc
Confirm the eys-pattern
at the lead of TP1
1-37
NX-MD1R/NX-MD1
Flow of functional operation until TOC read (MD)
Power ON
MD play key
Check Point
Slider turns REST
Switch ON.
Confirm that the voltage
at the pin 9 of CN408 are 0V
Mechanism Operation ON
Laser ON
Detection of Disc
Automatic tuning of
Focus S-curve amplitude
Disc is rotated
Focus servo ON
(Tracking servo ON)
Automatic tuning of
Focus error gain
Confirm that the voltage
at the pin 79 of IC500 are 4V
Confirm that the Focus error
S-cuve signal at the pin34 of
IC310 is approx.2Vpp
It is confirmed that pin2 of CN408
become 0V from VREF as an acceleration
pulse between about 400ms.
1-38
Automatic tuning of
Tracking error gain
TOC reading
Play a disc
Confirm that the eye-pattern
at the pin38 of IC310
NX-MD1R/NX-MD1
Maintenance of laser pickup (CD)
(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?
YES
O.K
NO
Replace it.
Replacement of laser pickup (CD)
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.
(3) Semi-fixed resistor on the APC board
The semi-fixed resistor on the APC board which is attached to the pickup is used to adjust the laser power.
Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch
the semi-fixed resistor.
If the laser power is lower than the specified value,the laser diode is almost worn out, and the laser pickup should
be replaced.
If the semi-fixed resistor would be adjusted when the pickup operates normally,the laser pickup may be damaged
due to excessive current.
1-39
NX-MD1R/NX-MD1
Maintenance of laser pickup (MD)
1. Cleaning of pickup lens
Prior to changing the pickup, clean the pickup lens.
2. Confirmation of the service life of laser
diode when the service life of the laser
diode has been exhausted, the following
symptoms will appear.
(1) Recording will become impossible.
(2) The RF output (EFM output and eye pattern amplitude)
will become lower.
(3) The drive current required for light emitting of laser diode
will be increased.
Confirm the service life according to the following flow chart:
Replacement of laser pickup (MD)
Change the MD pickup by referring
to "Removing the MD pickup" in the
Disassembly Method.
Set the pickup to [TEST] mode according
to the procedures described in the
Adjustment Method.
Adjust the laser power.
Completion the disc.
Is the recording power
(6.23mV) output with the
laser power under
test mode?
YES
Is the drive current
of laser diode
120mA or less?
YES
NO
Change the pickup
NO
Change the pickup
OK.
3. Method of measuring the drive current of
laser diode
When the voltage measured at R337(both end) of the MD servo
board (ENX-0223) have become 120mV or over, the service life
of the laser diode is judged to have been exhausted.
Completion of changing the MD pickup.
Since this system is designed to perform magnetic
recording, the laser power ten times or over of the
conventional MD player will be output. Therefore, be
sure to perform not only adjustment and operation
of this system so carefully as not to directly look at the
laser beam or touch on the body.
4. Semi-solid state resistors on
the APC board
The semi-solid state resistor on the APC board
attached to the pickup is used for adjusting the laser
power. Since these resistor should be adjusted in
pair according to the characteristics of the optical
block, be sure not to touch on the resistors.
[Caution] When both R337 have been shorted on such an occasion,
then the laser diode will be broken.
Therefore, take utmost care in handling the MD pickup.
1-40
Since the service life of the laser diode will be
exhausted when the laser power is low, it is
necessary to change the pickup. Meanwhile, do not
pickup. Otherwise, the pickup will be damaged due
to over current.
Function
Reference voltage output.
Equalizer center frequency setting pin.
BPF3T center frequency setting pin.
Power supply.
BPF22 center frequency setting pin.
Tracking error signal output.
Connects the sled error signal LPF capacitor.
Sled error signal output.
ADIP FM signal output.
ADIP signal comparator input.
I
Connects the ADIPAGC capacitor.
ADIP2 binary value signal output.
13 output / temperature signal output. Switched with serial commands.
Focus error signal output.
Reflection light quantity signal output for the main beam servo detector.
RF/ABCD bottom hold signal output.
Peak hold signal output for the RF/ABCD signals.
RF equalizer output.
Connects the RFAGC capacitor.
RFAGC input.
I
User comparator output.
User comparator non-inverted input.
I
Connects the capacitor for ADIP amplifier feedback circuit.
User operational amplifier output.
User operational amplifier inverted input.
I
RF amplifier output. Eye pattern checkpoint.
Input of the groove RF signal with AC coupling.
KCMND
MSTAT
CD CLOCK
CD RESET
USBON/OFF
RM IN
READY
SUB CODE
CD REQUEST
RDS CLOCK IN
HARD RESET
MD RESET
RDS DATA IN
CONTRAST ADJUST1
CONTRAST ADJUST2
CONTRAST ADJUST3
FAN MOTOR ON/OFF
75
~
51
I/OFunction
I
I
I
-
-
O
I
-
O
I
O
O
I
O
I
I
-
I
O
O
O
GND for A/D
Front control switch input 1
Front control switch input 2I
Not use-
6V/5.6V safety detect input
SW+9V safety detect inputI
Not useSW+8V safety detect input
AD power supply
Power supply
Main clock output (8MHz)
Main clock input (8MHz)
Connect to GND
Sub clock output (32MHz)
Sub clock input (32MHz)
Connect to GNDBeat cut input
Not use
Serial data output
Status input for CD control
Command clock output for CD controlO
Reset output for CD control
USB ON/OFF control outputO
Remote control signal input
Not useNot use
CD request input
Not useNot use
Connect to GND
System reset input
MD reset output
Not useNot useLCD contrast control signal output1
LCD contrast control signal output2O
LCD contrast control signal output3O
FAN MOTOR ON/OFF control output
AHB ON/OFF
CHIP ENABLE
CLOCK
DATA OUT
AMP POWER
AMP TR SWITCH
SPK PRT
VOL KEY LED
AMP INH
MD REC IND
AMP BAND-0(CS)
AMP BAND-1(CS)
STANDBY IND(RED)
STANDBY IND(GREEN)
TUNER power
DAVss
BACK LIGHT
DAVdd
O
I/O
I/O
O
O
O
O
O
I/O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
CD 5V control
MD control data I/O
MD control data I/O
Not use-
LCD data output
LCD chip select output
LCD deta clock output
LCD reset signal output
LCD reset signal output
Tuner data I/O
Tuner data clock input
Tuner select signal output
I
-
-
-
-
-
Streo indicator input
Not use-
Sytem mute control output
Line out mute control output
Stand by control output
Not use
Active bass ON/OFF control
Chip enable output for IC302
Clock output for IC302
Serial data output for IC302
Amplifier power signal output
TR switch control
Not use-
Volume key LED control
Obstruction signal control
Not use
Not use
Not use
Stand by LED control output (RED)
Stand by LED control output (GREEN)
Tuner power signal control
Not useConnect to GND
Not use
Back light ON/OFF control output
Connect to power supply
NX-MD1R/NX-MD1
1-61
NX-MD1R/NX-MD1
MN662790RSC (IC651) : Digital servo & digital signal prossesor
1.Terminal layout
2. Pin function
Pin
Symbol
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
BCLK
LRCK
SRDATA
DVDD1
DVSS1
TX
MCLK
MDATA
MLD
SENSE
FLOCK
TLOCK
BLKCK
SQCK
SUBQ
DMUTE
STAT
DSP-RST
SMCK
CSEL
TEST2
TVD
PC
ECM
ECS
VDETMON
TRD
FOD
VREF
FBAL
TBAL
FE
TE
RF ENV
TEST3
OFT
TRCRS
RFDET
BDO
LDON
O
O
O
-
-
O
I
I
I
-
-
-
O
I
O
I
O
I
-
I
-
O
-
O
O
-
O
O
I
O
O
I
I
I
I
I
I
I
I
-
20 1
21
40
80
61
41 60
Function
Bit clock output for SRDATA
LR signal separation output
Serial data output
Power supply for digital circuit
GND for digital circuit
Digital audio ineterface output
Micro computer command clock signal input
Micro computer command data input
Micro computer command load signal input (L:Load)
Not use
Not use
Not use
Sub code block signal output
External clock input for sub code Q register input
Sub code Qdata output
Muting input (H:Mute)
Status signal input
Reset signal input (L:Reset)
Not use
Not use
Traverse drive output
Not use
Spindle motor drive signal (Enforced mode output)
Spindle motor drive signal (Servo error signal output)
Not use
Tracking drive output
Focus drive output
Reference voltage for D/A output block
Focus balance adjust signal output
Tracking balance adjust signal output
Focus error signal input (Analog input)
Tracking error signal input (Analog input)
RF envelope signal input (analog input)
Connect to GND
Off track signal input (H:Off track)
Track crosssignal input
RF detect signal input (L:Detect)
Drop out signal input (H:Drop out)
Not use
Pin
SymbolI/OFunction
No.
PLLF2
41
DSLBDA
42
WVEL
43
ARF
44
IREF
45
DRF
46
DSLF
47
PLLF
48
VCOF
49
AVDD2
50
AVSS2
51
EFM
52
DSLB
53
VCOF2
54
SUBC
55
SBCK
56
VSS
57
X1
58
X2
59
VDD
60
BYTCK
61
LD
62
GAIN
63
IPFLAG
64
FLAG
65
CLVS
66
CRC
67
DEMPH
68
RESY
69
IOSEL
70
TEST
71
AVDD1
72
OUTL
73
AVSS1
74
OUTR
75
DQSY
76
Vcc5V
77
PSEL
78
MSEL
79
SSEL
80
I/O
-
Not use
-
Not use
I
RF signal input
I
Referrence current input
I
Bias pin for DSL
I/O
Loop filter pin for DSL
I/O
Loop filter pin for PLL
I/O
Loop filter pin for VCO
-
Power supply for analog circuit
-
GND for analog circuit
-
Not use
O
DSL balance output
I/O
Loop filter pin for Digtal servo VCO
-
Not use
-
Not use
-
GND for crystal oscillation circuit
Input for crystal oscillation circuit (f=16.9344MHz)
I
Output for crystal oscillation circuit (f=16.9344MHz)