JVC NX-PB10B, NX-PB10E, NX-PB10EY Service Manual

Preliminary

SERVICE MANUAL

CD PORTABLE SYSTEM

MB730<Rev.001>201010SERVICE MANUAL

NX-PB10B, NX-PB10E, NX-PB10EY

COPYRIGHT © 2010 Victor Company of Japan, Limited

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

COPYRIGHT © 2010 Victor Company of Japan, Limited

TABLE OF CONTENTS

No.MB730<Rev.001>

2010/10

SPECIFICATION

Amplifier section

Output Power 4 W (2 W + 2 W) at 16 Ω (10% THD)

Audio Input AUDIO IN: Stereo mini (

250 mV/47 kΩ

Digital input USB terminal

Tuner

FM tuning range 87.50 MHz - 108.00 MHz

Disc player

Dynamic range 80 dB

Wow and flutter Immeasurable

USB

USB specification Compatible with USB 2.0 Full Speed

Compatible device Mass storage class

Compatible system FAT16, FAT32

Output power DC 5 V 500 mA

SD

Compatible device SD, SDHC

Compatible system FAT16, FAT32

iPod

Output power DC 5 V 500 mA

General

Speaker type Bass-Reflex type

Speaker unit 8 cm x 2

Speaker impedance 16 Ω

Power requirements AC 230 V / 50 Hz

Power consumption 25 W (at operation)

1.00 W or less (on standby)

Dimensions (approx.) 400 mm × 215 mm × 91 mm (W × H × D)

Mass (approx.) 2.3 kg

ø 3.5 mm)

Design and specifications are subject to change without notice.

1-2 (No.MB730<Rev.001>)

SECTION 1

PRECAUTION

1.1 Safety Precautions

(1) This design of this product contains special hardware and

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

(2) Alterations of the design or circuitry of the product should

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

(3) Many electrical and mechanical parts in the products have

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

(4) The leads in the products are routed and dressed with ties,

clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the original lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassem­bling.

(5) Leakage shock hazard testing

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

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

• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an

AC voltmeter having, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.15µF AC-type capacitor between an ex-

posed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC

voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).

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

0.15 F AC TYPE

Place this
probe on

1500 10W

Good earth ground

1.2 Warning

(1) This equipment has been designed and manufactured to

meet international safety standards.

(2) It is the legal responsibility of the repairer to ensure that

these safety standards are maintained.

(3) Repairs must be made in accordance with the relevant

safety standards.

(4) It is essential that safety critical components are replaced

by approved parts.

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

voltage.

1.3 Caution

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

1.4 Critical parts for safety

In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)

each exposed
metal part.

(No.MB730<Rev.001>)1-3

1.5 Preventing static electricity

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

1.5.1 Grounding to prevent damage by static electricity

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

(1) Ground the workbench

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

(2) Ground yourself

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

(caption)
Anti-static wrist strap

1M

Conductive material
(conductive sheet) or iron palate

(3) Handling the optical pickup

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

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

1.6 Handling the traverse unit (optical pickup)

(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit.
(2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the

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

1.7 Attention when traverse unit is decomposed

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

• Apply solder to the short land sections before the card wire is disconnected from the connector on the servo board. (If the card wire
is disconnected without applying solder, the pickup may be destroyed by static electricity.)

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

1-4 (No.MB730<Rev.001>)

solder short

1.8 Important for laser products

1.CLASS 1 LASER PRODUCT

2.CAUTION :

(For U.S.A.) Visible and/or invisible class II laser radiation
when open. Do not stare into beam.
(Others) Visible and/or invisible class 1M laser radiation
when open. Do not view directly with optical instruments.

3.CAUTION : Visible and/or invisible laser radiation when
open and inter lock failed or defeated. Avoid direct
exposure to beam.

4.CAUTION : This laser product uses visible and/or invisible
laser radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are defeated. 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 here in may result in
hazardous radiation exposure.

!

Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

REPRODUCTION AND POSITION OF LABELS and PRINT

WARNING LABEL and PRINT

(No.MB730<Rev.001>)1-5

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

SECTION 3

DISASSEMBLY

3.1 Main body (Used model: NX-PB10E)

3.1.1 Removing the Rear cover (See Fig.1, 2, 3)

(1) Remove the three screws A, three screws B and two

screws C attaching the Rear cabinet. (See Fig.1)

BC CA

AABB

Fig.1

(2) Disconnect the antenna wire from post pin FM1

board. (See Fig.2)

FM1

of the Main

3.1.2 Removing the Main board (See Fig.4)

(1) Disconnect the card wire from iPod board connected to

connector CN103 of the Main board.

(2) Disconnect the card wire from Key board connected to con-

nector CN701

(3) Disconnect the connector wire from Left speaker connect-

ed to connector J2

(4) Disconnect the connector wire from Right speaker con-

nected to connector J3 of the Main board.

(5) Disconnect the connector wire from Door switch board con-

nected to connector CN405 of the Main board.

(6) Disconnect the connector wires from USB board connect-

ed to connectors J13
board.

(7) Disconnect the card wire from USB board connected to

connector CN607

(8) Disconnect the connector wire from Door motor connected

to connector CN404 of the Main board.

(9) Disconnect the connector wire from CD mechanism con-

nected to connector CN902 of the Main board.

(10) Disconnect the flexible wire from CD pickup connected to

connector CN901

(11) Remove the six screws D attaching the Main board.

CN405 J2 J3

of the Main board.

of the Main board.

, CN603 and CN306 off the Main

of the Main board.

of the Main board.

CN306 CN902 CN103

DD

CN404

D

Fig.2

(3) Disconnect the connector wire from Trans board connect-

ed to connector CN402

1-6 (No.MB730<Rev.001>)

of the Main board. (See Fig.3)

CN402

Fig.3

J13 CN607

CN701CN603 CN901

DD D

Fig.4

3.1.3 Removing the Key board (See Fig.5)

(1) Remove the nine screws E attaching the Key board.

E

Fig.5

3.1.4 Removing the USB board (See Fig.6)

(1) Remove the three screws F attaching the USB board.
(2) Remove the two screws G and one screw H attaching the

Door switches.

G

3.1.6 Removing the Door motor (See Fig.8)

(1) Remove the three screws K attaching the Door motor.

K

Fig.8

3.1.7 Removing the CD mechanism (See Fig.9)

(1) Remove the three screws L attaching the CD mechanism.

F

H

Fig.6

3.1.5 Removing the iPod boar (See Fig.7)

(1) Remove the two screws J attaching the holder.
(2) Disengage the shaft of iPod bracket from Front cabinet.

J

Fig.7

shaft

L

Fig.9

3.1.8 Removing the Trans board (See Fig.10)

(1) Disconnect the power cord from connector CN1103

Trans board.

(2) Disconnect the connector wires from Power transformer

connected to connector CN1101
board.

(3) Remove the three screws M attaching the Trans board.

and CN1104 of the Trans

M

of the

CN1103 CN1104 CN1101

Fig.10

(No.MB730<Rev.001>)1-7

M

SECTION 4

ADJUSTMENT

This service manual does not describe ADJUSTMENT.

SECTION 5

TROUBLESHOOTING

This service manual does not describe TROUBLESHOOTING.

1-8 (No.MB730<Rev.001>)

<MEMO>

1-9 (No.MB730<Rev.001>)

Victor Company of Japan, Limited

Personal AV Operation 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.MB730<Rev.001>)

Printed in Japan

VSE

SCHEMATIC DIAGRAMS

CD PORTABLE SYSTEM

NX-PB10B, NX-PB10E,

NX-PB10EY

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

Contents

Block diagrams
Standard schematic diagrams
Printed circuit boards

COPYRIGHT 2010 Victor Company of Japan, Limited.

2-1
2-2
2-10 to 12

No.MB730SCH<Rev.001>

2010/12

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.