JVC UXP55/EU - Service Manual Immediate Download

SERVICE MANUAL

No.22036

2003/4

MICRO COMPONENT SYSTEM

22036

2003

UX-P55

TABLE OF CONTENTS

Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

CA-UXP55

SP-UXP55

COMPACT

DIGITAL AUDIO

TAPE

FM/AM

MICRO

COMPONENT

SYSTEM

UX·P55

CD-R/RW PLAYBACK

MD/AUX

TIMER

CLOCK

STANDBY / ON

VOLUME

FUNCTION

SOUND

DIRECT OPERATING

AHB PRO

REV.MODE

PHONES

AUTO REVERSE

REC

SLEEP

STANDBY/ON

MD/AUX

FM/AM

TAPE

DISPLAY

DIMMER

REPEAT

RANDOM

PROG

FM MODE

AUTO

PRESET

SOUND

MODE

CANCEL

MULTI KEY

SET

PTY

/EON

DISPLAY

MODE

RM-SUXP5R REMOTE CONTROL

VOLUME

AHB

PRO

SP-UXP55

B ----------------------------- U.K.

E --------- Continental Europe

EN ------------ Norther Europe

Area Suffix

1-2 (No.22036)

SECTION 1

Important Safety Precautions

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, 1,000

per volt or more sensitivity

in the following manner. Connect a 1,500

10W resistor

paralleled by a 0.15

µF 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

(No.22036)1-3

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.

1-4 (No.22036)

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 CD players.

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 CD pickup unit.

· Apply solder to the short land sections before the flexible wire is disconnected from the connector CN101 on the CD servo board.

(If the flexible wire is disconnected without applying solder, the CD 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.

Conductive material

(conductive sheet) or iron palate

(caption)

Anti-static wrist strap

CN601 on

mechanism

board

Shorting round

Flexible wire

(No.22036)1-5

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 compact disc 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 de

feated. 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 herein may result in

hazardous radiation exposure.

REPRODUCTION AND POSITION OF LABEL and PRINT

WARNING LABEL and PRINT

Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

Caution

Label