Jvc RV-NB50-B Service Manual

SERVICE MANUAL

POWERED WOOFER CD SYSTEM

MB723<Rev.003>20104SERVICE MANUAL

RV-NB50B, RV-NB50E, RV-NB50EN,

RV-NB50EV, RV-NB51WE, RV-NB51WEN,

RV-NB51WEV, RV-NB52BB, RV-NB52BE,

RV-NB52BEN, RV-NB52BEV, RV-NB50J,

RV-NB50C, RV-NB50US, RV-NB50A,

RV-NB52BJ

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

No.MB723<Rev.003>

2010/4

SPECIFICATION

Disc player

CD capacity 1CD

Signal-to-noise ratio 85 dB

Dynamic range 90 dB

Tuner

FM tuning range 87.50 MHz - 108.00 MHz

Antenna FM telescopic antenna

General

Speakers Full range 8 cm (3 3/16”) cone × 2

Speaker impedance 16 Ω

Super woofer 13 cm (5 1/8”) cone × 2

Speaker impedance 7 Ω

Output power 40 W

Input terminal USB Playable files MP3, WMA

Compatible device Mass storage class

Output power DC 5 V 500 mA

Dock for iPod DC 5 V 500 mA

DC IN DC 12 V

Output terminal PHONES (Ø3.5) × 1

Power supply AC 230 V , 50 Hz (Europe)

AC 120 V , 60 Hz (Northern America)

AC 240 V , 50 Hz (Australia)

AC 110 V - 240V , 50 Hz/60 Hz (Other area)

DC 15 V (R20 (SUM-1)/D (13D)-size batteries × 10)

External DC 12 V (Car battery via the optional car adapter)

Power consumption When using an AC outlet 28 W (at operation)

1 W (on standby)

External DC 12 V 2 A (power on mode)

Dimensions 666 mm (26 1/4”) × 231 mm (9 1/8”) × 240 mm (9 1/2”) (W/H/D)

Mass Approx. 6.8 kg (15.0 lds) (without batteries stored in the battery compartment)

Designs & specifications are subject to change without notice.

1-2 (No.MB723<Rev.003>)

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.MB723<Rev.003>)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

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.

1-4 (No.MB723<Rev.003>)

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

SECTION 3

DISASSEMBLY

3.1 Main body (Used figure were RV-NB50E)

3.1.1 Removing the Punching panel (See Fig.1)

(1) Remove the twelve screws A attaching the both side of the

Punching panel.

Fig.1

3.1.2 Removing the Rear cabinet (See Fig.2, 3, 4, 5)

(1) Remove the four screws B attaching the both side of the

Subwoofer. (See Fig.2)

(2) Remove the ten screws C attaching the Rear cabinet. (See

Fig.3)

(3) Remove the two screws D attaching the CD mechanism.

(See Fig.3)

CCD

Fig.3

(4) Disconnect the connector wire from Power supply board

connected to connector CN101 Fig.4)

of the Main board. (See

Fig.2

CN101

Fig.4

(No.MB723<Rev.003>)1-5

(5) Disconnect the connector wire from Power supply board

connected to connector CN301 of the Main board. (See

Fig.5)

3.1.4 Removing the Power supply board (See Fig.8)

(1) Remove the two screws F and two screws G attaching the

Power supply board.

CN301

Fig.5

3.1.3 Removing the SMPS board (See Fig.6, 7)

(1) Remove the two screws E attaching the SMPS board. (See

Fig.6)

Fig.6

(2) Disconnect the connector wires from Power supply board

connected to connectors of SMPS board. (See Fig.7)

Fig.8

3.1.5 Removing the CD mechanism (See Fig.9, 10, 11, 12)

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

ed to connector CN102

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

nected to connector CN103

of the Main board. (See Fig.9)

CN102

Fig.9

of the Main board. (See Fig.10)

1-6 (No.MB723<Rev.003>)

CN103

Fig.10

connector

Fig.7

(3) Disconnect the card wire from Main board connected to

connector CN450

(4) Disconnect the connector wire from Right key board con-

nected to connector CN303 of the Main board. (See Fig.11)

(5) Disconnect the connector wire from USB board connected

to connector CN201

(6) Disconnect the connector wire from Left key board con-

nected to connector CN301

(7) Disconnect the connector wire from LCD board connected

to connector CN304

of the iPod board. (See Fig.11)

of the Main board. (See Fig.11)

CN450CN301

CN303

CN201

Fig.11

of the Main board. (See Fig.12)

(2) Disconnect the connector wire from Main board connected

to connector of the Mechanism board. (See Fig.14)

connector

Fig.14

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

nected to connector CN305

of the Main board. (See Fig.15)

CN304

Fig.12

3.1.6 Removing the Main board (See Fig.13, 14, 15, 16)

(1) Disconnect the card wire from pickup connected to connec-

tor CN701

of the Main board. (See Fig.13)

CN305

Fig.15

(4) Remove the four screws H attaching the Main board. (See

Fig.16)

Fig.16

CN701

Fig.13

(No.MB723<Rev.003>)1-7

3.1.7 Removing the iPod board (See Fig.17)

(1) Remove the two screws J attaching the iPod board.

3.1.10 Removing the Key board (See Fig.20)

(1) Remove the twelve screws M attaching the Key boards.

Fig.17

3.1.8 Removing the LCD board (See Fig.18)

(1) Remove the three screws K attaching the LCD board.

Fig.18

3.1.9 Removing the Front panel (See Fig.19)

(1) Disconnect the connector wire from Right key board con-

nected to connector CN407 (2) Disconnect the connector wire from Left key board con-

nected to connector CN408 of the Volume board. (3) Remove the four screws L attaching the Front panel. (4) Disengage four hooks a engaged Front panel.

of the Volume board.

3.1.11 Removing the Right speakers (See Fig.21, 22, 23)

(1) Remove the two screws N attaching the Woofer, (See

Fig.21)

Fig.20

CN407 CN408

hook

(2) Remove the four screws P attaching the Speaker cover.

(See Fig.22)

Fig.21

hook

Fig.19

Fig.22

1-8 (No.MB723<Rev.003>)

(3) Remove the four screws Q attaching the Main speaker.

(See Fig.23)

3.1.12 Removing the Left speaker

(1) Left speaker removing method as follow the 3.1.11 Re-

moving the Right speakers.

Fig.23

SECTION 4

ADJUSTMENT

This service manual does not describe ADJUSTMENT.

SECTION 5

TROUBLESHOOTING

This service manual does not describe TROUBLESHOOTING.

(No.MB723<Rev.003>)1-9

Victor Company of Japan, Limited

Home Entertainment Business Division Personal AV Operation 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.MB723<Rev.003>)

Printed in Japan

VSE

SCHEMATIC DIAGRAMS

POWERED WOOFER CD SYSTEM

RV-NB50B, RV-NB50E, RV-NB50EN,

RV-NB50EV, RV-NB51WE, RV-NB51WEN,

RV-NB51WEV, RV-NB52BB, RV-NB52BE,

RV-NB52BEN, RV-NB52BEV, RV-NB50J,

RV-NB50C, RV-NB50US, RV-NB50A,

RV-NB52BJ

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

Contents

Block diagrams Standard schematic diagrams Printed circuit boards

2-1 2-2 2-7 to 11

No.MB723SCH<Rev.003>

2010/4

+ 26 hidden pages