JVC MX-KC45J, MX-KC45C Diagram

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SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MB51020063

MX-KC45J,MX-KC45C

CA-MXKC45SP-MXKC45 SP-MXKC45

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

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

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

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

No.MB510

2006/3

SPECIFICATION

Amplifier Output Power 200 W per channel, min. RMS, driven into 6 Ω at 1kHz, with no more than

10% total harmonic distortion

Input Sensitivity/Impedance (1 kHz)

Cassette Deck Section Frequency Response Type I (NORMAL) : 63 Hz - 12 500 Hz

CD Player CD Capacity 3 CDs

Tuner (Tuning Range) FM Tuner 87.5 MHz - 108.0 MHz

Unit Dimensions (W/H/D) 270 mm × 307 mm × 492mm (10-11/16" × 12-1/8" × 19-3/8")

Speaker Specifications SP-MXKC45 (each unit)

Power Specifications Power Requirements AC 120 V , 60 Hz

AUX IN 400 mV/50 kΩ Speaker terminals 6 - 16 Ω Phones 32 Ω - 1 kΩ

17 mW/ch output into 32 Ω

Wow And Flutter : 0.15% (WRMS)

Dynamic Range 85 dB

Signal-To-Noise Ratio 85 dB

Wow And Flutter Unmeasurable

AM Tuner 530 kHz - 1 710 kHz

Mass Approx. 9.3 kg (20.5 lbs)

Type 3-way bass-reflex type

Speaker Unit Woofer : 16 cm (6-5/16") cone × 1

Mid : 5cm (2") cone × 1 Tweeter : 2 cm (13/16") dome × 1

Power Handling Capacity 200 W

Impedance 6 Ω

Frequency Range 45 Hz - 22 000 Hz

Sound pressure level 87 dB/W·m

Dimensions (W/H/D) 220 mm × 324 mm × 238 mm (8-11/16" × 12-13/16" × 9-3/8")

Mass Approx. 3.6 kg (8 lbs)

Power Consumption 180 W (power on mode)

23 W (in Standby mode) 1 W (in ECO mode)

Design and specifications are subject to change without notice.

1-2 (No.MB510)

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.MB510)1-3

1.5 Importance administering point on the safety

Full Fuse Replacement Marking

Marquage Pour Le Remplacement Complet De Fusible

Graphic symbol mark (This symbol means fast blow type fuse.)

should be read as follows ;

FUSE CAUTION

FOR CONTINUED PROTECTION AGAINST RISK OF FIRE, REPLACE ONLY WITH SAME TYPE AND RATING OF FUSES ;

F901 : 3.5A 125V

Le symbole graphique (Ce symbole signifie

fusible de type a fusion rapide.)

doit etre interprete comme suit ;

PRECAUTIONS SUR LES FUSIBLES

POUR UNE PROTECTION CONTINUE CONTRE DES RISQUES D'INCENDIE, REMPLACER SEULEMENT PAR UN FUSIBLE DU MEME TYPE ;

F901 : 3.5A 125V

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

1-4 (No.MB510)

SECTION 3

DISASSEMBLY

3.1 Main body

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

(1) Remove the two screws A and four screws B attaching the

metal cover from both side of main body. (See Fig,1)

(2) Remove the six screws C attaching the metal cover from

back side of main body. (See Fig.2)

Fig.1

Fig.2

(No.MB510)1-5

3.1.2 Removing the CD changer mechanism (See Fig.2 to 7)

(1) Disconnect the connector wire from fan connected to con-

nector CN603 of amp board. (See Fig.3)

(2) Remove the four screws D attaching the heat sink cover.

(See Fig.2)

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

connector CN601

(4) Disconnect the card wire from tuner pack connected to

connector CN306

(5) Open the CD tray and remove the CD door.

Caution:

If CD door can not open at power to ON condition, rotate the gear and open the CD tray. (See Fig.5)

(6) Disconnect the card wire connected to connector CN201

and CN303 of the main board. (See Fig.6)

(7) Disconnect the connector wire connected to connector

and CN302 of the main board. (See Fig.6)

CN301

(8) Remove the two screws E attaching the CD changer mech-

anism of back side of main body. (See Fig.7)

(9) Remove the four screws F attaching the CD changer

mechanism from both side of main body. (See Fig.3, 4)

of the main board. (See Fig.3)

of the main board. (See Fig.4)

CN601

CN303

GEAR (top view)

Fig.5

CN201

CN306

Fig.3

Fig.4

CN603

CN302

CN301

Fig.6

Fig.7

1-6 (No.MB510)

3.1.3 Removing the main board

(See Fig.6, 8)

(1) Remove the six screws G attaching the main board. (See

Fig.6)

(2) Disconnect the connector wire connected to connector

of the motor board.

CW3

(3) Disconnect the connector wire connected to connector of

traverse mechanism.

(4) Solder the short land section of the CD pickup and then dis-

connect the card wire from main board connected to CD pickup. (See Fig.8)

Caution:

• Solder the short land section of the CD pickup before disconnecting the card wire from the connector on the CD pickup. If the card wire is disconnected without attaching the solders, the pickup may be destroyed by static electricity.

• When attaching the CD pickup, be sure to remove solders from the short land section after connecting the card wire to the connector on the CD pickup.

3.1.4 Removing the amp board/rear panel (See Fig.9, 10)

(1) Disconnect the connector wire from switch board connect-

ed to connector CN202

(2) Disconnect the connector wires from transformer connect-

ed to connector CN902 and CN903 of amp board. (See Fig.9)

(3) Remove the four screws H attaching the rear panel. (See

Fig.10)

(4) Remove the four screws J and three screws K attaching

the amp board from rear panel. (See Fig.10)

of amp board. (See Fig.9)

short land section

Pickup

Fig.8

CN202 CN903CN902

Fig.9

JJ J

Fig.10

K K

(No.MB510)1-7

3.1.5 Removing the front panel assembly (See Fig.3, 4, 11 and 12)

(1) Disconnect the two earth wires from bottom plate. (See

Fig.11)

(2) Remove the one screw L attaching the front panel assem-

bly from bottom side. (See Fig.12)

(3) Remove the two screws M attaching the front panel assem-

bly. (See Fig.3, 4)

(4) Disengage hook a on the both side of the front panel as-

sembly. (See Fig.3, 4)

earth wire

Fig.11

3.1.6 Removing the cassette mechanism assembly (See Fig.13)

(1) Remove the six screws N attaching the cassette mecha-

nism assembly.

3.1.7 Removing the front board assembly (See Fig.13)

(1) Remove the seven screws P attaching the front board as-

sembly.

3.1.8 Removing the switch board assembly (See Fig.13)

(1) Remove the main volume knob. (2) Remove the eighteen screws Q attaching the switch board

assembly.

Fig.12

NQQ

Fig.13

1-8 (No.MB510)

SECTION 4

ADJUSTMENT

This service manual does not describe ADJUSTMENT.

SECTION 5

TROUBLESHOOTING

This service manual does not describe TROUBLESHOOTING.

(No.MB510)1-9

Victor Company of Japan, Limited Audio/Video Systems Category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.MB510)

Printed in Japan

VPT