JVC CAUXP7R - Service Manual Immediate Download

1-1

UX-P7

SERVICE MANUAL

MICRO COMPONENT SYSTEM

No.21009

Jul. 2001

2001 VICTOR COMPANY OF JAPAN, LTD.

UX-P7

Contents

Safety precautions

Preventing static electricity

Important for laser products

Disassembly method

Main adjustment

Flow of functional operation

until TOC read (CD)

Maintenance of laser pickup

Replacement of laser pickup

Description of major ICs

Internal connection of display

1-2

1-4

1-6

1-7

1-15

1-19

1-20

1-21

1-40

This service manual is printed on 100% recycled paper.

Area Suffix

Australia

China

Korea

Singapore

South Africa

Argentina

SP-UXP7

CA-UXP7

SP-UXP7

COMPACT

DIGITAL AUDIO

TAPE

FM/AM

MICRO

COMPONENT

SYSTEM

UX·P7

CD-R/R W PLA YBACK

MD/AUX

TIMER

CLOCK

STANDBY / ON

STANDBY

/ ON

VOLUME

AHB PRO

SOUND

AUTO REVERSE

REC

REV.MODE

PHONES

SLEEP

STANDBY/ON

MD/AUX

FM/AM

TAPE

DISPLAY

DIMMER

REPEAT

RANDOM

PROG

FM MODE

AUTO

PRESET

SOUND

MODE

CANCEL

MULTI KEY

SET

RM-SUXP7U REMOTE CONTROL

VOLUME

AHB PRO

LEVEL

MC-Service

1-2

UX-P7

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 eachexposed 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.).

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.

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

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)

1-3

UX-P7

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.

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.

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.

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.

(U.K only)

1-4

UX-P7

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.

1.1. Grounding to prevent damage by static electricity

Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.

Be careful to use proper grounding in the area where repairs are being performed.

1.1.1. Ground the workbench

1. 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.

1.1.2. Ground yourself

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

1.1.3. 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.

1.2. 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. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it

Conductive material

(conductive sheet) or iron plate

(caption)

Anti-static wrist strap

1-5

UX-P7

1.3. Cautions on removing the CD traverse unit

* For removing the CD traverse unit in detail, refer to the "Adjustment Method" section of this manual.

1. Before disconnecting the flexible wire from the connector CN601 on the CD SERVO board, solder the part shown in

the figure below.

(Note:If the flexible wire is disconnected from the CN601 without presoldering, it may cause breakdown of the CD

pickup assembly.)

2. When reassembling the CD traverse unit, be sure to remove the solder from the soldered part after reconnecting the

flexible wire to the CN601.

CD SERVO board

Soldering part

CN601

C601

C602

C603

C604

C605

C606

C607

C610

C611

C612

C613

C614

C615

C616

C617

C619

C620

C621

C622

C623

C624

C631

C632

C633

C641

C642

C643

B619

C651

C652

C653

C654

C655

C656

C657

C658

C661

C663

C664

C665

C667

C668

C669

C670

C671

C672

C673

C676

C677

C679

C680

C691

C692

C693

C694

C695

C696

C699

C801

C802

C811

C812

C813

C814

C815

C821

C822

C823

C824

C831

C832

C833

CN601

CN651

CN652

CN801

D831

R648

IC652

IC801

IC802

L831

Q631

Q801

R601

R602

R603

R604

R605

R606

R610

R611

R612

R613

R617

R618

R619

R620

R621

R631

R632

R634

R635

R636

R641

R642

R643

R647

R651

R652

R653

R654

R655

R656

R657

R658

R659

R661

R662

R663

R664

R665

R666

R667

R668

R669

R670

R682

R683

R685

R691

R692

R695

R696

R701

R702

R703

R704

R705

R706

R707

R708

R709

R710

R801

R802

R803

R804

R805

R806

R807

R808

R809

R812

R821

R822

R823

R824

R831

W605

CN606

X651

B604

B616

B614

R813

C816

B613

B615

B610

B612

B617

B618

IC601

R607

B601

B603

B602

B611

B609

B608

B607

B606

B605

D601

D602

R681

C681

R684

MUTE

FLAG

CDDG

BLKCK

/REST

MLD

MDATA

MCLK

CDDG

SUBQ

SQCK

/RST

STAT

FM+

REST

SM-

SM+

D.GND

FM-

ARF

A.GND

F-

T-

T+

F+

GND

115

T02

SCD

CDDG

LM+

OPSW

GND

CLSW

LM-

M.GND

SW10

OPEN

OPSW

CLSE

CD+B

CDL

A.GND

CDR

MC-Service