JVC RV-NB10BJ User manual

SERVICE MANUAL
COPYRIGHT © 2006 Victor Company of Japan, Limited No.MB519
2006/3
POWERED WOOFER CD SYSTEM
MB51920063
RV-NB10BJ,RV-NB10BC,RV-NB10BB,
RV-NB10BE,RV-NB10BEN,RV-NB10BEV,
RV-NB10WJ,RV-NB10WC,RV-NB10WB,
RV-NB10WE,RV-NB10WEN
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
TABLE OF CONTENTS
1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
5 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

1-2 (No.MB519)
SPECIFICATION
Design and specifications are subject to change without notice.
Amplifier Output Power United States and Canada 6 W per channel, min. RMS, at 4Ωfrom 150 Hz to 15kHz with no more
than 10% total harmonic distortion.
20 W per channel woofer, min. RMS into 4Ωat 60 Hz with no more
than 10% total harmonic distortion.
Other countries [Max.]
20 W (10 W + 10 W) at 4Ω(full range), 40 W (20 W + 20 W) at 4Ω,
60 Hz (woofer)
[10% THD]
10 W (5 W + 5 W) at 4Ω(full range), 30 W (15 W + 15 W) at 4Ω, 60
Hz (woofer)
Input Sensitivity/Impedance (1 kHz) AUX IN : 300 mV/47 kΩ
MIC/GUITAR INPUT:
Switchable
MIC 200Ω- 2 kΩ(6.3 mm dia. plug)
GUITAR 100 kΩ- 1 MΩ(6.3 mm dia. plug)
Output Sensitivity/Impedance (1 kHz) Phones : 16Ω- 1 kΩ
0 - 12 mW/ch output into 32Ω
Cassette Deck Frequency Response : Type II (High position) 60 Hz - 14 kHz
Wow and Flutter 0.15% (WRMS)
Disc Player Dynamic range 90 dB
Signal-to-noise ratio 95 dB
Wow and Flutter Unmeasurable
Tuner WIRELESS (Only the United States and Canada) 87.50 MHz - 108.00 MHz
FM Tuner 87.50 MHz - 108.00 MHz
AM Tuner United States and Canada 530 kHz - 1 710 kHz
Other countries (MW) 522 - 1 629 kHz
(LW) 144 - 288 kHz
Antenna United States and Canada FM telescopic antenna
Ferrite core antenna for AM
Other countries FM telescopic antenna
Ferrite core antenna for AM (MW/LW)
Speakers Full range 8 cm (3-3/16")×2, 4Ω
Super woofer 16 cm (6-5/16")×2, 4Ω
Wireless Transmitter
(VFT-001)
(Only the United States and
Canada)
Power Requirements DC 3 V ("R6/AA(15F)" batteries [2])
Transmitting Frequencies 88.10 MHz, 88.30 MHz, 88.50 MHz, 88.70 MHz, 107.10 MHz, 107.30
MHz, 107.50 MHz, 107.70 MHz
Input terminal Stereo mini plug
Frequency response 50 Hz to 12 000 Hz
Battery life (at normal temperature) Approx. 50 hours (with Alkaline batteries)
Approx. 20 hours (with Manganese batteries)
Dimensions 78 mm×55 mm×35 mm (W/H/D) (3-1/8"×2-3/16"×1-7/16")
Mass Approx. 50 g (0.12 lbs) (without batteries)
General Dimensions 690 mm×239 mm×296 mm (W/H/D) (27-3/16"×9-7/16"×11-11/16”)
Mass 9.5 kg (21 lbs) (without batteries)
10.6 kg (23.4 lbs) (with batteries)
Power Specifications Power Requirements United States and Canada AC 120 V , 60 Hz
DC 15 V ("R20/D(13F)" batteries [10])
External DC 12 V (car battery via optional CA-R120 car adapter)
Other countries AC 230 V , 50 Hz
DC 15 V ("R20/D(13F)" batteries [10])
External DC 12 V (car battery via optional car adapter)
Power Consumption United States and Canada 50 W (power on mode)
1.6 W (in standby mode)
Other countries 43 W (power on mode)
1.6 W (in standby mode)

(No.MB519)1-3
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purpos-
es. 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 per-
formed 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 characteris-
tics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by us-
ing replacement components rated for higher voltage, watt-
age, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Ser-
vice 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 charac-
teristics 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 reassem-
bling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isola-
tion check on the exposed metal parts of the product (an-
tenna 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, particular-
ly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage cur-
rent 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, 1,000Ωper volt or more sensitivity
in the following manner. Connect a 1,500Ω10W 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.).
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 pre-
forming 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)
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE

1-4 (No.MB519)
1.5 Safety Precautions (U.K only)
(1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con-
tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace-
ment parts must be identical to those used in the original circuits.
(2) Any unauthorised design alterations or additions will void the manufacturer's guarantee; furthermore the manufacturer cannot
accept responsibility for personal injury or property damage resulting therefrom.
(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never
be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in
the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts
other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts
shown in the Parts List of the Service Manual and 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.
1.5.1 Warning
(1) Service should be performed by qualified personnel only.
(2) This equipment has been designed and manufactured to meet international safety standards.
(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
(4) Repairs must be made in accordance with the relevant safety standards.
(5) It is essential that safety critical components are replaced by approved parts.
(6) 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.

(No.MB519)1-5
1.6 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.
1.6.1 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.
(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.
1.7 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.
1.8 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 flexible wire is disconnected from the connecto on the servo board. (If the flexible
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 flexible wire.
1M
Conductive material
(conductive sheet) or iron palate
(caption)
Anti-static wrist strap
Connector
CD pickup Short land
section
Card wire

1-6 (No.MB519)
1.9 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 CD,MD and DVD player uses invisible
laser radiation and is equipped with safety switches which
prevent emission of radiation when the drawer is open and
the safety interlocks have failed or are 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.
REPRODUCTION AND POSITION OF LABELS
CAUTION : Visible and Invisible
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
CLASS 1
LASER PRODUCT
CAUTION : Visible and Invisible
laser radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE TO
BEAM. (e)
VARNING : Synlig och
osynling laserstrålning när
den öppnas och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO : Avattaessa ja suojalukitus
ohitettuna tai viallisena olet alttiina
näkyvälle ja näkymättömälle
lasersäteilylle. Vältä säteen
kohdistumista suoraan itseesi. (f)
ADVARSEL : Synlig og usynlig
laserstråling når maskinen er
åben eller interlocken fejeler.
Undgå direkte eksponering til
stråling. (d)
WARNING LABEL

(No.MB519)1-7
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-8 (No.MB519)
SECTION 3
DISASSEMBLY
3.1 Main body
3.1.1 Removing the rear cabinet
(See Fig.1 to 3)
(1) Remove the six screws A(both side) attaching the side
protector by 6 angle wrench. (See Fig.1)
(2) Remove the eight screws B(both side) attaching the woof-
er, and then disconnect the speaker wires. (See Fig.2)
(3) Remove the ten screws Cattaching the rear cabinet, and
then disconnect the grand wire from tuner board. (See
Fig.3)
Fig.1
Fig.2
Fig.3
AA
BB
C
E
CK

(No.MB519)1-9
3.1.2 Removing the cassette mechanism assembly
(See Fig.4 and 5)
(1) Remove the four screws Dattaching the cassette mecha-
nism. (See Fig.4)
(2) Disconnect the card wires connected to CN33 and CN34
from display control board. (See Fig.5)
Fig.4
Fig.5
D
CN33 CN34

1-10 (No.MB519)
3.1.3 Removing the CD mechanism assembly
(See Fig.3 and 6)
(1) Remove the two screws Eattaching the CD mechanism
assembly. (See Fig.3)
(2) Disconnect the card wire connected to CN403 from tuner
board. (See Fig.6)
(3) Disconnect the card wires connected to CN407 and CN408
from equalizer amp board. (See Fig.6)
Fig.6
3.1.4 Removing the equalizer amp board
(See Fig.7)
(1) Remove the four screws Fattaching the equalizer amp
board. (See Fig.7)
Fig.7
Tuner boaard
Equalizer amp board
CN403
CN407CN408
FF

(No.MB519)1-11
3.1.5 Removing the power supply board
(See Fig.8 and 9)
(1) Disconnect the connector wires connected to CN194 and
CN195 from power transformer. (See Fig.8)
(2) Disconnect the connector wires connected to CN191 and
CN193 from power amplifier board. (See Fig.8)
(3) Remove the two screws Gattaching the power supply
board. (See Fig.9)
Fig.8
Fig.9
CN194 CN195
CN191
CN193
G

1-12 (No.MB519)
3.1.6 Removing the power transformer
(See Fig.10)
(1) Remove the four screws Hattaching the power transform-
er.
3.1.7 Removing the power amplifier board
(See Fig.3, 10 and 11)
(1) Remove the two screws Jattaching the cover. (See Fig.10)
(2) Remove the four screws Kattaching the heat sink cover.
(See Fig.3)
(3) Remove the four screws Lattaching the power amplifier
board. (See Fig.11)
Fig.10
Fig.11
H
J
cover power transformer
LL

(No.MB519)1-13
3.1.8 Removing the display control board
(See Fig.12 to 14)
(1) Disconnect the connector wire connected to CN751 from
guitar and mic. jack board. (See Fig.12)
(2) Remove the four screws Mattaching the display control
board. (See Fig.13)
(3) Disconnect the card wire connected to CN404 from CD
servo board. (See Fig.14)
Fig.12
Fig.13
Fig.14
CN751
M
CN404

1-14 (No.MB519)
3.1.9 Removing the CD servo board
(See Fig.15 and 16)
(1) Remove the four screws Nattaching the CD servo board.
(See Fig.15)
(2) Disconnect the connector wire connected to CN603 from
door switch board. (See Fig.15)
(3) Disconnect the connector wire connected to feed motor
board.
(4) Solder the short land section on the card wire of CD pickup.
(See Fig.16)
CAUTION:
• Solder the short land section on the card wire of CD
pickup before disconnecting the card wire from the
connector on the CD pickup. If the card wire is discon-
nected without attaching the solders, the pickup may
be destroyed by static electricity.
• When attaching the CD pickup, be sure to remove sol-
ders from the short land section after connecting the
card wire to the connector on the CD pickup.
(5) Disconnect the card wire connected to CN601 from CD
pickup.
Fig.15
Fig.16
CN603
N
short land section

(No.MB519)1-15
3.1.10 Removing the traverse mechanism
(See Fig.17)
(1) Remove the four screws Pattaching the traverse mecha-
nism.
Fig.17
3.1.11 Removing the guitar and mic. Jack board
(See Fig.18 and 19)
(1) Remove the two screws Qattaching the guitar and mic.
Jack board. (See Fig.18)
(2) Remove the one screw Rattaching the guitar and mic. Jack
board. (See Fig.19)
Fig.18
Fig.19
PP
Q
R

1-16 (No.MB519)
3.1.12 Removing the front cabinet
(See Fig.20 and 21)
(1) Remove the eights screws S(both side) attaching the
speaker cover. (See Fig.20)
(2) Remove the eight screws T(both side) attaching the
speaker. (See Fig.21)
Fig.20
Fig.21
S
S
left sideright side
T
T

(No.MB519)1-17
3.1.13 Removing the key board
(See Fig.22 and 23)
(1) Take off the volume and super woofer volume knob.
(2) Remove the two nuts Uattaching the main volume and su-
per woofer volume. (See Fig.22)
(3) Remove the eight screws Vattaching the key board. (See
Fig.23)
Fig.22
Fig.23
U
V
V

1-18 (No.MB519)
3.1.14 Removing the transmitter board
(See Fig.24 and 24)
(1) Remove the two screws Wattaching the transmitter board.
(See Fig.24)
(2) Pull up the transmitter board with cable. (See Fig.24)
Fig.24
Fig.25
Bottom case
W

(No.MB519)1-19
3.2 CD traverse mechanism section
• Remove the CD traverse mechanism assembly. (See "3.1.12 Removing the CD traverse mechanism assembly".)
3.2.1 Removing the CD pick
(See Figs.1 and 2)
(1) Remove the CD mechanism holders in the direction of the
arrow. (See Fig.1.)
(2) Remove the four screws Aattaching the pick cover. (See
Fig.1.)
(3) Remove the insulators (brown and orange) from the CD
mechanism base assembly. (See Fig.2.)
(4) Remove the CD shaft from the CD mechanism base as-
sembly in the direction of the arrow 2 while moving the
shaft stopper in the direction of the arrow 1. (See Fig.2.)
(5) Remove the CD pick from the CD mechanism base assem-
bly.
3.2.2 Installing the CD pick
(See Figs.1 and 2)
(1) While installing the section aof the CD pick to the CD
mechanism base assembly, set the CD shaft to the section
b. (See Fig.2.)
(2) Install the insulators (brown and orange) to the CD mecha-
nism base assembly. (See Fig.2.)
(3) Attach the pick cover and CD mechanism holders. (See
Fig.1.)
Fig.1
Fig.2
A
A
Pick cover
CD mechanism holder
CD mechanism holder
Shaft stopper CD shaft
2
1
b
a
Insulator (Brown) Insulator (Brown)
Insulator (Orange) Insulator (Orange)
B
Feed motor
CD mechanism base assembly
CD pick

1-20 (No.MB519)
3.2.3 Removing the spindle motor and feed motor
(See Fig.2 to 4)
(1) Remove the two screws Battaching the feed motor. (See
Fig.2.)
(2) Remove the turn table in an upward direction and remove
the two screws Cattaching the spindle motor. (See Fig.3.)
(3) From the bottom side of the CD mechanism base assem-
bly, remove the screw Dattaching the spindle/feed motor
board. (See Fig.4.)
(4) Remove the solders from the sections (c, d) on the spindle/
feed motor board. (See Fig.4.)
3.2.4 Installing the spindle motor and feed motor
(See Figs.3 to 6)
(1) Tighten the two screws Band two screws Cto the same
torque. (See Figs.2 and 3.)
(2) Fasten the spindle/feed motor board with the screw D.
(See Fig.4.)
(3) Solder the spindle and feed motors on the spindle/feed mo-
tor board as before. (See Fig.4.)
(4) Install the turn table. When installing, press straight down
at the center of the turn table until the distance from the sur-
face of the CD mechanism base assembly to the top of the
turn table is exactly 19.4±0.1mm. (See Fig.5.)
(5) After insertion is complete, bond the motor shaft and turn
table together. (See Fig.6.)
(6) Use 'LOCKTITE' #460 bonding agent, and apply as little as
possible. Take care not to allow any excess bonding agent
to get onto the turn table. Be extremely careful not to allow
bonding agent to adhere to the motor bearings. (See
Fig.6.)
Fig.3
Fig.4
Fig.5
Fig.6
Turn table
C
Spindle motor
Spindle motor Feed moto
r
c d
D
Spindle/feed motor board
CD mechanism base assembly
19.4
0.1mm
Turn table
Spindle motor
Turn table
'LOCKTITE' #460