JVC UXP-5 Service manual

SERVICE MANUAL

MICRO COMPONENT SYSTEM

UX-P5

COMPACT

DIGITAL AUDIO

CD-R/RW PLAYBACK

STANDBY/ON

DISPLAYDIMMER

AUTO

SOUND

FM MODE

PRESET

MODE

CD

CANCEL MULTI KEY SET

AHB

VOLUME

PRO

RM-SUXP5U REMOTE CONTROL

MICRO COMPONENT SYSTEM UX·P5

STANDBY / ON

AHB PRO

CD TAPE FM/AM

STANDBY/ON

SLEEP

MD/AUX

REPEATRANDOMPROG

FM/AM

TAPE

/

DIRECT OPERATING

SOUND

REC

PHONES

AUTO REVERSE

CLOCK

MD/AUX

VOLUMEFUNCTION

TIMER

REV.MODE

REC

UX-P5

SP-UXP5 CA-UXP5 SP-UXP5

Contents

Safety precautions Preventing static electricity Important for laser products Disassembly method Main adjustment Flow of functional operation until TOC read (CD)

1-2 1-4 1-6 1-7 1-15

1-19

Area Suffix

A UJ UP US UW UY

Maintenance of laser pickup Replacement of laser pickup Description of major ICs Internal connection of display

Australia

U.S. Militaly

Korea

Singapore

South Africa

Argentina

1-20 1-20 1-21 1-40

No.21000

1-1

Jun. 2001

UX-P5

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 circuitr y 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.).

0.15 F AC TYPE

1500 10W

Good earth ground

AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity)

Place this probe on each exposed metal part.

!

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 m ust 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 v oltage.

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 pr inted 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)

1-2

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(U.K only)

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 ; further more the manufacturer cannot accept responsibility f or 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 or iginal lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.

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.

1-3

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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.

(caption) Anti-static wrist strap

Conductive material (conductive sheet) or iron plate

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

1-4

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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

B618

D831

B617

C832

51

CN606

LMCLSW GND OPSW LM+

M.GND SW10 SW10 CLOSE OPEN OPSW CLSE CD+B CD+B CDL A.GND A.GND CDR

MUTE FLAG SCD SCD CDDG CDDG BLKCK /REST MLD MDATA MCLK CDDG SUBQ SQCK /RST STAT

R831

13

L831

CN652

C658

116

B602

CN651

1

R654

R802

R813

C801

C823

W605 31

C833

C831

C824

Q801

BE

R821

13

R801

C811

C816

C814

B607

B606

B605

1

B601

R691

R701

R705

IC802

R692

R666

C677

C673

R665

R695

R696

C656

61

1

C655

21

C657

R653

C672 C671 C670

R806

12

R655

R656

R658

C653

B611

R657

R659

B612

R805

C813

R807

R808

R809

R822

R824

R823

C812

1

IC801

24

R803

R804

R812

C802

B608

C815

R636

115

CN601

F-T-T+F+GNDVRLDMDT2KF1NCT1SRF2

C654

C821

R651

R652

R601

R602

C652

X651

C651

R667

R681

41

C676

R682

C822

CN601

R670

C669

D601

C667

C668

C680

C681

B613

C612

C610

R683

C607

C643

R642

C641

C642

C605

C606

R641

R643

R603

R604

B609

C679

R664

R669

R685

R607

B619

B610

C665

R684

R663

C664

C663

R648

C616

C614

C617

IC601

171632

R620

C601

CD SERVO board

R708

R710

R706

R703

C691

B603

C695

C699

R709

C693

IC652

B604

B614

C694

C696

R707

R702

R704

C692

R661

R668

C661

A.GND

R662

ARF

B615

C621

R647

C613

C620

C622

R617

C615

C611

C619

R612

R613

C631

1

C624

C623

BE

B616

C632

Q631

C

D602

R632

R631

R634

R635

1

CN801

C633

FMD.GND SM+

C602

C603

C604

R621

R605

R606

R610

R611

SMREST

6

FM+

R618

R619

T02

Soldering part

CN601

1-5

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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 laserradiation and is equipped with safety switches whichprevent 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.

VARNING : Osynlig laserstrålning är denna del är öppnad

och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet

alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen.

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.

CAUTION

!

Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check.

ADVARSEL : Usynlig laserstråling ved åbning , når

sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når

sikkerhetsbryteren er avslott. unngå utsettelse for stråling.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

1-6

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Disassembly method

Removing the metal cover

(See Fig.1 and 2)

1.

Remove the six screws A on the back of the body.

2.

Remove the two screws B on the side of the body.

3.

Pull both sides of the metal cover outward and lift the rear part of the cover.

Removing the rear cover (See Fig.3)

Prior to performing the following procedure, remove the metal cover.

Metal cover

A

Fig.1

Metal cover

1.

Remove the two screws C on the back of the body.

C

B

2

Fig.2

C

Rear panel

Rear cover

Fig.3

1-7

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Removing the tuner board

(See Fig.4 and 5)

Prior to performing the following procedure, remove the metal cover.

1.

Disconnect the card wire from connector CN1 on the tuner board.

2.

Remove the screw D on the right side of the body.

3.

Remove the two screws E on the rear panel.

Removing the CD mechanism assembly (See Fig.6 to 8)

Prior to performing the following procedure, remove the metal cover and the rear cover.

1.

Disconnect the card wires from connector CN903, CN904 and the wire from CN905 on the main board on the upper side of the body.

E

Rear panel

D

Fig.4

CN1

Tuner board

Rear cover

2.

Remove the screw D attaching the tuner board and the CD mechanism on the right side of the body.

3.

Remove the two screws F attaching the rear panel and the CD mechanism on the back of the body.

4.

Move the rear part of the CD mechanism assembly upwards to disengage the two joints a and release from the rear panel.

Pull the front panel toward the front and move the rear part of the CD mechanism assembly upwards. Then pull out the CD mechanism assembly from the front panel backward.

REFERENCE:

To remove the CD mechanism assembly efficiently, disconnect the card wireconnecting the tuner board with the main board in advance.

Main board

CN905

CN904

CN903

Front panel assembly

CD mechanism assembly

Fig.5

Rear panel

CD mechanism assembly

Fig.6

D

Tuner board

Card wires

1-8

Front panel assembly

Fig.7

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Remove the rear panel (See Fig.8 to 11)

Prior to performing the following procedure, remove the metal cover, rear cover and the CD mechanism assembly.

1.

Remove the seven screws G attaching the rear panel.

2.

Disconnect the card wire from CN902 on the main board.

3.

Disengage the lower two joints b on each side of the rear panel using a screwdriver and remove the rear panel backward (The tuner board and the fan will be also detached.Remove them as needed).

Removing the fan (See Fig.9 and 12)

Prior to performing the following procedure, remove the metal cover, the rear cover andthe CD mechanism assembly.

1.

Disconnect the wire from connector CN908 on the main board.

2.

Remove the two screws H on the back of the body.

3.

Move the fan upwards to disengage the four joints c and release from the rear panel.

Rear panel

Main board

CN908

G

CN902

Joint a

Fig.8

Fig.9

F

Fan

Joint a

G

Rear panel

Tuner board

Joint c

H

Rear panel

Fan

Joint c

H

Joint c

Rear panel

Joint b

Fig.10

Rear panel

Fig.11Fig.12

1-9

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Removing the power amplifier board / power amplifier sub board / main board / heat sink (See Fig.13 to 21)

Prior to performing the following procedure, remove the metal cover, the rear cover, the CD mechanism assembly and the rear panel.

1.

Disconnect the card wire from connector CN900, CN901, CN933 and CN931 on the main board respectively.

2.

Disconnect the wire from connector CN949, CN950 and CN951 on the power supply board.

3.

Remove the two screws I on the right side of the body.

4.

Move the boards and heat sink assembly upwards and disengage the joint d and the two joints e to release the power amplifier board and the main board from the chassis (Refer toFig.15 and 16).

Move the rear part of the board and heat sink assembly to the right side.

CN931

Front panel assembly

Power supply board

Main board

CN900

CN933

CN901

CN931

CN901

Fig.13

CN900

CN933

CN949 / CN950 / CN951

Main board

Power supply board

CN949

CN950 CN951

CAUTION:

The wire extending from the lower side of the main board is still connected with the body (Refer to Fig.17).

5.

Disconnect the wire from connector CN906 and W950 on the lower side of the main

board (Refer to

Fig.18).

Main board

I

Front panel assembly

Fig.14

Front panel assembly

I

Joints e

Fig.15

Heat sink

1-10

Power amplifier board

Heat sink

Power amplifier board

Chassis

Fig.16Fig.17

Joint d

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Removing the power amplifier board

(See Fig.19 and 21)

6.

Disconnect the power amplifier board from connector CN941 on the power amplifier sub board.

Removing the power amplifier sub board (See Fig.19 to 21)

7.

Disconnect the two wires from connector CN944, CN945, CN946 and CN947 on the power amplifier sub board.

8.

Remove the two screws J attaching the power amplifier sub board and the heat sink.

Removing the main board

(See Fig.19 to 21)

9.

Disconnect the wires from connector CN944, CN945, CN946 and CN947 on the power amplifier sub board.

Main board

W950

Fig.18

CN906

Heat sink

10.

Remove the two screws K attaching the main board and the heat sink.

REFERENCE:

The power amplifier board, the power amplifier sub board, the main board and the heat sink can be remove drespectively.

J

Heat sink

K

Power amplifier sub boar

Power amplifier board

Fig.19

Main board

Heat sink

Main board

Power amplifier sub boar

Power amplifier board

CN944

CN945

CN947

Power amplifier board

CN946

Power amplifier sub board

CN941

Fig.20Fig.21

1-11

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Removing the power transformer assembly (See Fig.22 and 23)

Prior to performing the following procedure, remove the metal cover, the rear cover, the CD mechanism assembly and the rear panel.

Remove the assembly consisting of the power amplifier board, the power amplifier sub board and the main board fromthe chassis incompletely (Refer to Fig.17).

1.

Remove the cord stopper upwards on the back of the body.

2.

Disconnect the power cord from connector J1000 on the board of the power transformer assembly.

3.

Remove the four screws L attaching the power transformer assembly.

Removing the front panel assembly

(See Fig.24 and 25)

Prior to performing the following procedure, remove the metal cover, the rear cover, the CD mechanism assembly and the rear panel.

Power transformer assembly

Power cord

Cord stopper

L

J1000

Cord stopper

Fig.22

Power cord

J1000

L

Remove the assembly consisting of the power amplifier board, the power amplifier sub board and the main board (Refer to Fig.17 and 18).

1.

Remove the two screws M on each lower side of the body.

2.

Disengage the two joints f on each lower side of the body using a screwdriver andpull out the front panel assembly toward the front.

Front panel assembly

Power transformer assembly

Fig.23

Front panel assembly

1-12

Joint f

M

Joint f

Fig.24Fig.25

M

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Removing the display board / switch board (See Fig.26 to 28)

Prior to performing the following procedure, remove the front panel assembly.

1.

Pull out the VOLUME knob on the front panel.

2.

Remove the fifteen screws N on the back of the front panel and remove the display board with the switch board.

3.

Remove the screw O attaching the switch board to the LCD holder.

4.

If necessary, unsolder the wire connected to connector FW931 on the display board and FW931 on the switch board.

5.

If necessary, remove the band bundling the wire extending from the headphone board and display board.

N

Front panel assembly

Fig.26

N

Switch board

VOLUME knob

N

Display board

N

Display board

FW931

N

Band

Fig.27

Switch board

O

Fig.28

1-13

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Removing the headphone board

(See Fig.29)

Prior to performing the following procedure, remove the front panel assembly.

1.

Remove the screw P on the back of the front panel.

2.

If necessary, remove the band bundling the wire extending from the headphone board and the display board.

Removing the cassette mechanism assembly (See Fig.29 and 30)

Prior to performing the following procedure, remove the front panel assembly.

1.

Press the EJCT button on the front panel to open the cassette door.

2.

Remove the four screws Q on the back of the front panel.

Q

Cassette mechanism assembly

Fig.29

Display board

Band

P

Headphone board

Q

Front panel assembly

Removing the LED board

(See Fig.30 to 32)

Prior to performing the following procedure, remove the front panel assembly.

1.

Press the EJCT button on the front panel to open the cassette door.

2.

Remove the cassette holder in the direction of the arrow.

3.

Release the two joint hooks g engaging the LED board with the cassette door.

LED board

Cassette door

EJCT button

Fig.30

1-14

Hooks g

Cassette door holder

Cassette door

Fig.31Fig.32

Main adjustment

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Measurement Instruments Required for

Adjustment

1. Low frequency oscillator This oscillator should have a capacity to output 0dBs to 600 50Hz-20kHz.

2. Attenuator impedance : 600

3. Electronic voltmeter

4. Distortion meter

5. Frequency counter

6. Wow & flutter meter

7. Test tape VTT703L : Head azimuth VT712 : Tape speed and running unevenness (3kHz) VT724 : Reference level (1kHz)

8. Blank tape TYPE TYPE

9. Torque gauge : For play and back tension FWD(TW2111A), REV(TW2121a) and FF/REW(TW2231A)

10. Test disc: CTS-1000

Measurement conditions

Power supply voltage : AC230V (50Hz)----B/E/EE/EN : AC110/127V/230V(50/60Hz) : UB/UF/US/UX/U Reference output : Speaker : 0.775V/4 : Headphone : 0.077V/32 Reference frequency and input level ------------------------------ 1kHz, AUX : -8dBs MIX MIC: -54dBs (UB/UF/US/UX/U) Input for confirming recording and playback characteristics ------------------------- AUX : -28dBs Measurement output terminal ------- at Speaker J3002

Load resistance --------------------------- 4

Radio Input signal

AM frequency --------------------------------------- 400Hz AM modulation ---------------------------------------- 30% FM frequency --------------------------------------- 400Hz FM frequency deviation ------------------------ 22.5kHz

at an oscillation frequency of

: AC-225 : AC-514

Tuner section

B/E/EN version FM Band cover: 87.5 MW Band cover: 522 LW Band cover: 144 EE version FM Band cover: 65 MW Band cover: 522 LW Band cover: 144 UB/UF/US/UX/U version FM Band cover: 87.5 MW Band cover: 531 SW Band cover: SW1 2.3 : SW2 7 Voltage applied to tuner +B : DC5.7V VT : DC 12V Reference measurement output 26.1mV(0.28V)/3 Input positions AM : Standard loop antenna FM : TP1 (hot) and TP2 (GND)

Standard measurement position of volume

Function switch to Tape Beat cut switch to Cut Super Bass/Active hyper Bass to OFF Bass Treble to Center Adjustment of main volume to reference output VOL : 28

Precautions for measurement

1. Apply 30pF and 33k side and 0.082 sweeper input side.

2. The IF sweeper output level should be made as low as possible within the adjustable range.

3. Since the IF sweeper is a fixed device, there is no need to adjust this sweeper.

4. Since a ceramic oscillator is used, there is no need to perform any MIX adjustment.

5. Since a fixed coil is used, there is no need to adjust the FM tracking.

6. The input and output earth systems are separated. In case of simultaneously measuring the voltage in both of the input and output systems with an electronic voltmeter for two channels, therefore, the earth should be connected particularly carefully.

7. In the case of BTL connection amp., the minus terminal of speaker is not for earthing. Therefore, be sure not to connect any other earth terminal to this terminal. This system is of an BTL system.

8. For connecting a dummy resistor when measuring the output, use the wire with a greater code size.

9. Whenever any mixed tape is used, use the band pass filter (DV-12).

F and 100k in series to the

108MHz

1,629kHz

288kHz

74MHz, 87.5 108MHz

1,629kHz

288kHz

108MHz

1,602kHz, 530 1,710kHz

6.995MHz

21.85MHz

to the IF sweeper output

1-15

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<<

Arrangement of Adjusting Position

>>

Cassette mechanism section

Head azimuth adjusting screw (Forward side)

Cassette AMP board

VR37

C308

R314

MOTOR SPEED

VR37

L301

B155

VR31

BIAS ADJ

VR31

Head azimuth adjusting screw (Reverse side)

MB

PBRAGPBL

RECRAGRECL

MS

SW8V

MG

1

CN34

C307

R313

R315

C310

C314

Q302

R327

C317

C319

C221

B112

C313

C316

C121

L303

R310

R335

B198

R353

Q305

C106

Q103

R305

Q321

R303

R122

Q101

C103

B163

R221

10

B156

C303

R115

R101

B157

R108

C113 R110 R109

R102

C110

C104

R301

R121

1

C108

C107

9

B151

R112

R111

C102

R107

B152

C302

R103 1

C301

C111

C306

B164

Cassette mechanism section (Back side)

Head azimuth adjusting screw (Forward side)

Playback/Recording & eraser head

R304

C109

B158

8

B106

C101

6

B166

R116

R212 R211 C211

R216

9

IC32

9

C201

B101

B109B108

C209

CN33

R342

C213 R210 R209

C207

B159

16

B102

R341

C208

R207

1 CN31

B200

B110

1

R340

R205

R208

B160

R105 C105

NC

R343

C305

C206

R345

R201

1IC31

TAP

B113

C304

RRE

C202 C210

Q331

C375

C205

C203

B161

R215

R339 C334

R106

R206

5VMGSOL

R204

R203

R222

C204

B168

PHO

B153

R104

R202

C333

C332

R375

Q201

PLA

Q203

C331

Q372

FRE

R331

B167

R371

C376

10

70u

Q375

CN32

R376

R372 R373

B162

C371

16

1

C374

R338

B

E

D375

Q376

B

Q371

E

R337

R336

9

IC33

8

Head azimuth adjusting screw (Reverse side)

1-16

Tape Recorder Section

UX-P5

Items

Confirmation of head angle

Measurement conditions

Test tape : VTT703L (8kHz) Measurement output terminal : Speaker terminal Speaker R (Load resistance: 4 ) : Headphone terminal

Measurement method

1 Playback the test tape VTT703L (8kHz) 2 With the recording & playback mechanism, adjust the head azimuth screw so that the forward and reverse output levels become maximum. After adjustment, lock the head azimuth at least by half turn. 3 In either case, this adjustment should be performed in both the forward and reverse directions with the head azimuth screw.

Confirmation of tape speed

Test tape : VT712 (3kHz) Measurement output terminal : Headphone terminal

Adjust VR37 so that the frequency counter reading becomes 2,940~3,090Hz when playing back the test tape VT712 (3kHz) with playback and recording mechanism after ending forward winding of the tape.

Reference Values for Confirmation Items

Standard Values

Maximum output

Tape speed of deck : 2,940 ~ 3,090Hz

Adjusting positions

Adjust the head azimuth screw only when the head has been changed.

VR37

Items

Difference between the forward and reverse speed

Measurement conditions

Test tape : VT712 (3kHz) Measurement output terminal : Speaker terminal Speaker R (Load resistance: 4 ) Measurement output terminal : Headphone

Wow & flutter Test tape

: VT712 (3kHz) Measurement output terminal : Headphone terminal

Measurement method

Standard Values

When the test tape VT712 (3kHz) has been played back with the recording and playback mechanism at the beginning of forward winding, the frequency counter reading of the difference between both of the mechanism should be 6.0Hz or less.

When the test tape VT712 (3kHz) has been played back with the recording and playback mechanism at the beginning of forward winding, the frequency counter reading of wow & flutter should be 0.25% or less (WRMS).

6.0Hz or less

0.25% or less (WRMS)

Adjusting positions

Head azimuth screw

1-17

UX-P5

Electrical Performance

Items

Adjustment of recording bias current (Reference Value)

Adjustment of recording and playback frequency characteristics

Measurement conditions

Mode: Forward or

reverse mode

Recording mode

Test tape : AC-514 to TYPE and AC-225 to TYPE Measurement output terminal : Both recording and headphone terminals

Reference frequency : 1kHz and 10kHz (REF.: -20dB) Test tape : AC-514 to TYPE Measurement input terminal : OSC IN

Measurement method

Standard Values

1 With the recording and playback mechanism, load the test tapes (AC-514 to TYPE

and AC-225 to TYPE ), and set the mechanism to the recording and pausing condition in advance. 2 After connecting 100

in series to the recorder head, measure the bias current with a valve voltmeter at both of the terminals. 3 After resetting the [PAUSE] mode, start recording. At this time, adjust VR31 for Lch and VR32 for Rch so that the recording bias current values become 4.0

) and 4.20 A (TYPE ).

A (TYPE

1 With the recording and playback mechanism, load the test tapes (AC-514 to TYPE

), and set the mechanism to the recording and pausing condition in advance. 2 While repetitively inputting the reference frequency signal of 1kHz and 10kHz from OSC IN, record and playback the rape. 3 While recording and playback the test tape in TYPE

, adjust VR31 for Lch and VR32 for Rch so that the output deviation between 1kHz and 10kHz becomes

-1dB

2dB.

AC-225 : 4.20 AC-514 : 4.0

Output deviation between 1kHz and 10kHz : -1dB

Adjusting positions

VR31

A

VR31

2dB

Reference Values for Electrical Function Confirmation Items

Items

Recording bias frequency

Measurement conditions

Forward or reverse

Test tape

: TYPE

(AC-514)

Measurement terminal : BIAS TP on P.C. board

Measurement method

1 While changing over to and from BIAS 1 and 2, confirm that the frequency is changed. 2 With the recording and playback mechanism, load the test tape. (AC-514 to TYPE

), and set the mechanism to the recording and pausing condition in advance. 3 Confirm that the BIAS TP frequency on the P.C. board is 100kHz

Eraser current (Reference value)

Forward or reverse

Recording mode

Test tape : AC-514 to TYPE and AC-225 to TYPE Measurement terminal : Both of the eraser head terminals

1 While recording and playback mechanism, load the test tapes (AC-514 to TYPE and AC-225 to TYPE ), and set the mechanism to the recording and pausing conditions in advance. 2 After setting to the recording conditions, connect 1W in series to the eraser head on the recording and playback mechanism side, and measure the eraser current from both of the eraser terminals.

6kHz.

Standard Values

100 kHz

6 kHz

TYPE : 120 mA TYPE : 75 mA

Adjusting positions

1-18

Flow of functional operation until TOC read (CD)

Power ON

Power Key

Slider turns REST SW ON.

Automatic tuning of TE offset

Check that the voltage at the pin4 of CN601 is 0V (a moment)?

UX-P5

Check Point

VREF

Tracking error waveform at TOC reading

pin 20 of IC601(TE)

Approx

1.8V

Tracking servo

Disc statas to rotate

off statas

Automatic measurement of TE amplitude and automatic tuning of TE balance

Approx.3sec

Tracking servo on statas

Disc to be braked to stop

TOC reading finishes

500mv/div 2ms/div

Fig.1

Laser ON

Detection of disc

Automatic tuning of Foucus offset

Automatic measurement of Focus A-curve amplitude

Disc is rotated

Focus servo ON (Tracking servo ON)

Automatic measurement of Tracking error amplitude

Automatic tuning of Tracking error balance

Check that the voltage at the pin2 of IC601 is 0V?

Confirm that the Focus error S-cuve siganl at the pin23 of IC601 is approx.2Vp-p

Confirm that the siganl from pin22 IC603 is 0V as a accelerated pulse during approx.400ms.

Confirm the waveform of the Tracking error signal at the pin20 of IC601 (See fig-1)

Automatic tuning of Focus error balance

Automatic tuning of Focus error gain

Automatic tuning of Tracking error gain

TOC reading

Play a disc

Confirm the eys-pattern at the lead of TP1

1-19

UX-P5

Maintenance of laser pickup

(1) Cleaning the pick up lens Befor you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab.

(2) Life of the laser diode (Fig.1) When the life of the laser diode has expired, the following symptoms wil appear. (1) The level of RF output (EFM output:ampli tude of eye pattern) will below.

Is RF output

1.1 0.15Vp-p?

YES

O.K

NO

Replace it.

Replacement of laser pickup

Turn off the power switch and,disconnect the power cord from the ac outlet.

Replace the pickup with a normal one.(Refer to "Pickup Removal" on the previous page)

Plug the power cord in,and turn the power on. At this time,check that the laser emits for about 3seconds and the objective lens moves up and down. Note: Do not observe the laser beam directly.

Play a disc.

(Fig.1)

(3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power.Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor. If the laser power is lower than the specified value,the laser diode is almost worn out, and the laser pickup should be replaced. If the semi-fixed resistor is adjusted while the pickup is functioning normally,the laser pickup may be damaged due to excessive current.

Check the eye-pattern at TP1.

Finish.

1-20

Description of major ICs

UPD780058 (IC931 ) : Main micon

1. Pin layout

80 ~ 65

UX-P5

2. Pin function Pin

No.

1

P15/AN15

2

P16/AN16

3

P17/AN17

4

AVss

5

P130/ANO0

6

P131/ANO1

7

AVREF1

8

P70/SI2/RxD0

9

P71/SO2/TxD0

10

P72/SCK2/ASCK

11

P20/SI1

12

P21/SO1

13

P22/SCK1

14

P23/STB/TxD1

15

P24/BUSY/RxD1

16

P25/SI0/SB0

17

P26/SO0/SB1

18

P27/SCK0

19

P40/AD0

20

P41/AD1

21

P42/AD2

22

P43/AD3

23

P44/AD4

24

P45/AD5

25

P46/AD6

26

P47/AD7

27

P50/A8

28

P51/A9

29

P52/A10

30

P53/A11

31

P54/A12

32

P55/A13

33

Vss1

34

P56/A14

35

P57/A15

36

P60

37

P61

38

P62

Port

1

~

24

25 ~ 40

Name

SAFETY0 DOOR_RST CDSAFETY

EQSW GCTRL

QRIN

SQCK STAT MDATA MCLK _XRST MLD MUTE SDATA SCK

CLOSE OPEN F_CD

_AHB1 VOLCE

_F_AUX _PBMUTE _SMUTE SPKMUTE _AHB P_OUT

PROTR MODEL1 MODEL2

64

~

41

I/O

I

Irregular voltage detection 0

I

REST/CLOSE switch detect port

I

CD safety voltage detect port

O

CD speed control

O

CD Gain Control

I

Q-code data input port

O

Q-code serial clock

I

CD status input port

O

CD data input port

O

CD data clock

O

CD reset

O

CD command ready signal

O

BTL mute control port

O

Serial Date (Tuner PLL/Tape IC)

O

Serial Clock (Tuner PLL/Tape IC)

I

Door close switch input port

I

Door poen switch input port

O

CD Function ("H"=CD)

O

Subwooder Amp AHB control

O

Volumn Chip Enable

O

Tape play mute ("L"=mute)

O

System mute

O

Speaker mute

O

Active Hyper Bass On/off ("L"=ON)

O

Power On/off ("H"=Power On)

O

Protector

I

MODEL 0: P3/P5; 1: P7

I

MODEL2 0: P3; 1: P5

Function

Safety Door Safety

CD CD

CD

CD CD CD CD CD CD CD Tuner/Tape Tuner/Tape

Door Door CD

Sound (P7only) Sound

AUX Tape Sound Sound Sound AMP

Safety

1-21

UX-P5

Pin No.

39

P63

40

P64/RD

41

P65/WR

42

P66/WAIT

43

P67/ASTB

44

P30/TO0

45

P31/TO1

46

P32/TO2

47

P33/TI1

48

P34/TI2

49

P35/PCL

50

P36/BUZ

51

P37

52

P120/RTP0

53

P121/RTP1

54

P122/RTP2

55

P123/RTP3

56

P124/RTP4

57

P125/RTP5

58

P126/RTP6

59

P127/RTP7

60

RESET

61

P00/INTP0/TI00

62

P01/INTP1/TI01

63

P02/INTP2

64

P03/INTP3

65

P04/INTP4

66

P05/INTP5

67

Vss0

68

VDD1

69

X2

70

X1

71

IC (VPP)

72

XT2

73

XT1/P07

74

VDD0

75

AVREF0

76

P10/ANI0

77

P11/ANI1

78

P12/ANI2

79

P13/ANI3

80

P14/ANI4

Port

Name

LEDRV LED_REC LEDFR STTA LCDAT LMODE LCDCK

REEL INH_ LCDCE DIMCTL VOLP LEDCTL BASM VOLM BASP PERIOD F_TU BUP

_REM RDSCK _MPX

BCTL BLKCK

SAFETY1 TAPE0 TAPE1 KEY1 KEY2

I/O

Lite LED indicate Reverse

O

Lite LED indicate REC

O

Lite LED indicate Forward

O

Tape IC Strobe

O

LCD data

O

LCD date mode control

O

LCD clock

O

Tape End Detection

I

LCD Driver inhibit ("L" at end of tran)

O

LCD driver chip enable

O

LCD DIM Control

O

Volumn Plus

I

Power Standby LED control

O

Bass Minus

I

Volumn Minus

I

Bass plus

I

Tuner PLL Strode

O

Tuner Function ("H"=TUNER)

O

Back up power detect ("H"=BACKUP)

O

Remote control input

I

RDS clock

I

FM Stereo Detection ("L"=STEREO)

I

Switched 5V controller ("H"=5Vuf off)

O

Block clock input port

I

Irregular voltage detection 1

I

Tape Switch 0

I

Tape Switch 1

I

Unit Key input 1

I

Unit Key input 0

I

Function

LED LED LED Tape LCD LCD LCD

Tape LCD LCD LED Sound LED Sound (P7 only) Sound Sound (P7 only) Tuner Tuner Backup

Remote con Tuner Tuner

AMP CD

Safety Tape Tape Key Key

1-22

LA6541 (IC801) : Foucus & Spindle & Feed & Tracking BTL driver

1. Pin Layout & block diagram

UX-P5

Vcc Vref Vin4 Vg4 Vo8 Vo7

24 23

22

21

20

19

11k

Vcc

Gnd

Vo6 Vo5 Vg3 Vin3 Cd Res

18

17 16

ohm

- +

Level shift

B T L driver

Level shift

11k ohm

1

Vcc Mute Vin1 Vg1 Vo1 Vo2 Vo3 Vo4 Vg2 Vin2 Reg

2

3456

Gnd

789101112

2. Pin function

Symbol Function

No.

1

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

2 3 4 5 6 7 8 9

Vcc

Mute

Vin1

Vg1 Vo1 Vo2 Vo3 Vo4 Vg2

Vin2

Reg Out

Reg In

Res

Cd

Vin3

Vg3 Vo5 Vo6 Vo7 Vo8 Vg4

Vin4

Vref

Vcc

Power supply (Shorted to pin 24) All BTL amplifier outputs ON/OFF BTL AMP 1 input pin BTL AMP 1 input pin (For gain adjustment) BTL AMP 1 input pin (Non inverting side) BTL AMP 1 input pin (Inverting side) BTL AMP 2 input pin (Inverting side) BTL AMP 2 input pin (Non inverting side) BTL AMP 2 input pin (For gain adjustment) BTL AMP 2 input pin External transistor collector (PNP) connection. 5V power supply output External transistor (PNP) base connection Reset output Reset output delay time setting (Capacitor connected externally) BTL AMP 3 input pin BTL AMP 3 input pin (For gain adjustment) BTL AMP 3 output pin (Non inverting side) BTL AMP 3 output pin (Inverting side) BTL AMP 4 output pin (Inverting side) BTL AMP 4 output pin (Non inverting side) BTL AMP 4 output pin (For gain adjustment) BTL AMP 4 output pin Level shift circuit's reference voltage application Power supply (Shorted to pin 1)

15

14

13

11k ohm

RESET

Regulator

11k ohm

Reg

out

In

1-23