JVC MX-G500R Service Manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MX-G500R

STANDBY/ON

SLEEP

AUX

DISPLAY M

FM/AM

O

DE

CD

RMÐSMXG500R R EMOT

12

456

78

10

PTY/EON

T

APE

VOL

MX-G500R

Area suffix

B ------------------------ U.K. E ---- Continental Europe EN ----- Northern Europe EV ------- Eastern Europe

STANDB

Y

ECO

STANDBY/ON

3

CD

MX-G

500R

3

SUBWOOFER

L

EVE

L

O

UND

S

O

DE

M

9

FM MODE

+10

Ð SELECT +

FADE T

APE A/B

MUTIN

G

DISC SKIP

+

UME

Ð

E CONTROL

SP-MXG500 SP-MXG500

EXTENDED SUP ER BASS

FM

CD

AUX

/ AM

PROGRAMRANDO

M

EPEAT

R

PHONES

REC STAR

T

C

D REC

DUBBING

/STO

P

START

FULL - LOGIC CONTROL

CA-MXG500R

DISPLAY

T

APE

TAPE BTAPE

A

Ð

DISPLA

Y MOD

E

SELECT +

PTY/EO

N

CD SYNCHRO RECORDIN

DISC CHANGE

2

3

1

D

C

CD-R/RW PLAYBACK

SOUND

M

ODE

CLOCK /TIMER

SUBWOOFER

LEVEL

G

Contents

Safety Precautions Important for laser produbts Preventing static electricity Disassembly method Wiring connection Adjustment method

1-2 1-4 1-5 1-6 1-19 1-20

Flow of functional operation until TOC read Maintenance of laser pickup Replacement of laser pickup Trouble shooting Description of major ICs

1-24 1-25 1-25 1-26 1-29~42

No.21098

Apr. 2002

MX-G500R

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 each exposed 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.

(This regulation does not correspond to J and C version.)

1-2

MX-G500R

(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

MX-G500R

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.

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 LABELS

CAUTION

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

CLASS 1 LASER PRODUCT

WARNING LABEL

1-4

MX-G500R

Preventing static electricity

1. Grounding to prevent damage by 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.

2. About the earth processing for the destruction prevention by static electricity

In the equipment which uses optical pick-up (laser diode), optical pick-up is destroyed by the static electricity of the work environment. Be careful to use proper grounding in the area where repairs are being performed.

2-1 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.

2-2 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 plate

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.

4. 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

Attention when CD mechanism assembly is decomposed

*Please refer to "Disassembly method" in the text for pick-up and how to detach the CD mechanism assembly.

1. Remove the CD changer unit.

2. Remove the CD changer mechanism.

3. Solder is put up before the card wire is removed from the pickup unit connector on the CD mechanism assembly. (When the card wire is removed without putting up solder, the CD pick-up assembly might destroy.)

4. Please remove solder after connecting the card wire with the pickup unit connector when you install picking up in the substrate.

Card wire

Picup unit connector

Soldering

Fig.2

CD changer unit

Fig.1

Card wire

Picup unit connector

CD changer mechanism

1-5

MX-G500R

Disassembly method

Removing the metal cover (See Fig.1)

1.

Remove the three screws A attaching the metal cover on the back of the body.

2.

Remove the six screws B attaching the metal cover on the both sides of the body.

3.

Remove the metal cover from the body by lifting the rear part of the cover.

ONE POINT

How to eject the CD tray (see fig.2)

Although it will end if the OPEN/CLOSE button is pushed when a power supply can be taken, when that is not right, CD tray will be opened manually. Turn the loading pulley gear at the bottom of the CD changer unit as shown in Fig.2 and draw the CD tray toward the front.

Metal cover

A

B

(both sides)

Fig.1

Loading pulley gear (See <CD changer unit>fig.1)

Removing the CD Tray fitting

(See Fig. 3)

Prior to performing the following procedure, eject the CD tray.

After drawing the lower part of the tray fitting toward

1. the front, remove the five claws. Then, while moving the tray fitting upward, remove it.

Removing the CD changer unit

(See Fig.4 to 7)

Prior to performing the following procedure, remove the metal cover and CD tray fitting.

1.

Remove the card wire attached to CD changer unit on the adhesion tape.

2.

Disconnect the card wire from the connector CW105 on the CD servo board.

3.

Disconnect the harness from the connector RCW6 on the main board and CW107 on the CD servo board.

4.

Remove the two screws C attaching the CD changer unit to the rear panel.

Fig.2

Joint

CD tray fitting

Claw

Fig.3

Card wire

CD changer unit

5.

Remove the two screws D attaching the CD changer unit to the both sides of front panel assembly.

6.

Draw the CD changer unit upward from behind while pulling the rear panel outward.

1-6

Adhesion tape

Fig.4

MX-G500R

CW105 CW107

Fig.5

CD servo board

CD changer unit

Main board

RCW6

Front panel

assembly

D

(both sides)

C

Rear panel

Fig.6

CD changer unit

Rear panel

Fig.7

Removing the front panel assembly

(See Fig.8 to 10)

Prior to performing the following procedure, remove the metal cover and CD changer unit.

1.

Disconnect the card wire from the connector FCW3 on the main board.

2.

Disconnect the harness from the connector JCW1, JCW2 and HCW3 on the main board.

3.

Remove the screw E attaching the earth terminal extending from the cassette mechanism assembly.

4.

Remove the two screws F attaching the front panel assembly to both sides of the body.

5.

Remove the screw G attaching the main board to the front panel assembly.

6.

Remove the screw H attaching the front panel assembly to the bottom of the body.

7.

Release the two joints1 and two joints2, and detach the front panel assembly toward the front.

Front panel

assembly

Joint1 (both sides)

(both sides)

F

FCW3

JCW2

Fig.8

Main board

JCW1

HCW3

E

(fixing the earth wire)

Main board

ACW1

ACW2

Amp. board

Front panel assembly

G

Fig.9

Joint1 (both sides)

F

(both sides)

1-7

MX-G500R

Removing the heat sink & amp. board

(See Fig.8, 11 and 12)

Prior to performing the following procedure, remove the metal cover and the CD changer unit.

1.

Disconnect the card wire from the connector ACW1 and the harness from the connector ACW2 on the amp. board.

2.

Remove the four screws I attaching the heat sink cover to the rear panel. Remove the heat sink cover.

3.

Remove the four screws J attaching the heat sink and two screws K attaching the speaker terminal to the rear panel.

4.

After moving the heat sink upward, remove the claws. Then pull out the heat sink & amp. board inward.

H

Heat sink

cover

Joint2

Fig.10

(Bottom side)

Rear panel

I

Removing the tuner board (See Fig.12 and 13)

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

1.

Disconnect the card wire from the connector CON01 on the tuner board.

2.

Remove the two screws L attaching the tuner board to the rear panel.

Removing the eco board (See Fig.12 and 13)

Prior to performing the following procedure, remove the metal cover, CD changer unit and heat sink & amp. board.

1.

Disconnect the power cord from the connector PJ2 on the eco board.

2.

Disconnect the harness from the connector PJ3 and RCW5 on the eco baord.

3.

Remove the two screws M attaching the eco board to the rear panel.

J

Heat sink

J

O

Rear panel

Tuner board

Fig.11

Rear panel

L N

K

Speaker terminal

M

Fig.12

Eco board

Removing the rear panel (See Fig.12)

Prior to performing the following procedure, remove the metal cover, CD changer unit, heat sink & amp. board and tuner board.

1.

Remove the two screws N and three screws O attaching the rear panel.

1-8

RCW5 PJ2

PJ3

Main board

CON01

Fig.13

MX-G500R

Removing the main board (See Fig. 14)

Prior to performing the following procedure, remove the metal cover, CD changer unit and rear panel.

1.

Disconnect the card wire from the connector FCW3 and the harness from the connector JCW1, JCW2 and HCW3 on the main board.

2.

Disconnect the harness from the connector PCW1 on the fuse board.

3.

Remove the screw G attaching the main board holder to the front panel assembly. (See Fig.9)

4.

Remove the two screws P attaching the heat sink to the bottom chassis.

Removing the power cord (See Fig. 14)

Prior to performing the following procedure, remove the metal cover, CD changer unit and rear panel.

1.

Disconnect the power cord from the connector PJ2 on the eco board (see fig.13) and pull up the power cord stopper upward.

Fuse board

PCW1

Power supply

board

RCW1

Power cord Power cord

stopper

Bottom chassis

Fig.14

Q

FCW3

JCW2

JCW1 Main board

HCW3

Heat sink

P

Heat sink

Removing the power ICs

(See Fig.15 and 16)

Prior to performing the following procedure, remove the metal cover, CD changer unit and heat sink & amp. board.

1.

Remove the four screws Q attaching the power ICs to the heat sink.

2.

Unsolder the power ICs solder point.

Removing the power transformer

(See Fig .17)

Prior to performing the following procedure, remove the metal cover, CD changer unit and heat sink & amp. board.

1.

Disconnect the harness from the connector RCW1 on the power supply board.

2.

Disconnect the harness from the connector PCW1 on the fuse board.

Power ICs solder point

Bottom chassis

R

Amp. board

Fig.15

Heat sink

Amp. board (reverse side)

Fig.16

Power transformer

PCW1

Fuse board

Power supply

board

RCW1

3.

Remove the four screws R attaching the power transformer to the bottom chassis.

Fig.17

1-9

MX-G500R

)

Prior to performing the following procedure, remove the metal cover, the CD changer unit and the front panel assembly.

Removing the power / CD switch board (See Fig.1)

1.

Disconnect the card wire from the connector UCW1 on the power / CD switch board.

2.

Remove the five screws A attaching the power / CD switch board.

Removing the FL display & system control board (See Fig.1)

1.

Disconnect the card wire from the connector UCW3, UCW4, UCW5 and UCW6 on the FL display & system control board.

2.

Remove the six screws B attaching the FL display & system control board.

3.

Disconnect the card wire from the connector UCW2 on the FL display & system control board.

B

UCW2 UCW3

B

UCW4

Front panel assembly (inner side

A

Power / CD switch board

Fig.1

Sound mode knob

Volume knob

FL diplay & system control board

UCW1

UCW5 UCW6

Removing the headphone jack board (See Fig.3)

Prior to performing the following procedure remove the FL display & system control board.

1.

You can pull out the headphone jack board.

Removing the front key switch board (See Fig.2 and 3)

Prior to performing the following procedure, remove the FL display & system control board.

1.

Pull out the sound mode knob, volume knob and subwoofer level knob from front side.

2.

Remove the twelve screws C attaching the front key switch board.

3.

Remove the front board releasing the two tabs.

4.

Disconnect the card wire from the connector UCW7 on the front key switch baord, if needed.

Removing the cassette mechanism assembly (See Fig.3)

UCW7

Tab

Mecha.

board

C

C D

Subwoofer level knob

Fig.2

Front panel assembly (inner side

Front key switch board

Headphone

jack board

D

1.

Disconnect the card wire from the connector on the mecha. board.

2.

Remove the six screws D attaching the cassette mechanism assembly.

1-10

D

(fixing the earth wire)

Connector

Cassette mechanism

assembly

Fig.3

MX-G500R

Prior to performing the following procedure, remove the CD changer unit.

Removing the CD tray (See Fig.1 to 3)

1.

Turn the black loading pulley gear on the under side of the CD changer unit in the direction of the arrow and draw the CD tray toward the front until it stops.

2.

Disconnect the card wire from connector CW103 on the CD servo board.

3.

Push down the two tray stoppers marked a and pull out the CD tray.

CD servo board

Loading pulley gear

CD tray

CD changer uint (reverse side)

CW103

CD tray

Fig.1

Reinstall the CD tray (See Fig.4 to 5)

1.

Align the gear-cam with the gear-tray as shown fig.4, then mount the CD tray.

2.

When assembling the CD tray, take extreme care not engage with gear - synchro.

Gear-cam

Gear-tray

CD tray

(Tray stopper)

Fig.2

a (Tray stopper)

a

CD servo board CW103

Fig.3

Gear-convert

Gear-tray

Gear-cam

timing point

Gear-tray

CD tray

Fig.4 Fig.5

Gear-synchro

1-11

MX-G500R

Removing the sensor board / the turn table motor assembly (See Fig.6 to 8)

Prior to performing the following procedure, remove the CD tray.

A

1.

Remove the screw A attaching the sensor board and release the two tabs b attaching the sensor board on the under side of the CD tray.

2.

Disconnect the harness from connector CW1 on the sensor board and release the harness from the two hooks c. Remove the sensor board.

3.

Remove the screw B attaching the turn table. Detach the turn table from the tray.

4.

Pull outward the tab marked d attaching the turn table motor assembly on the upper side of the tray and detach the turn table motor assembly from the tray.

Tray

b

CW1

c

b

Sensor board

Fig.6

Turn table

B

Turn table motor assembly

Fig.7

d

Fig.8

1-12

Removing the belt, the CD servo board and the switch board (See Fig.9 and 10)

Prior to performing the following procedure, remove the CD tray.

1.

Detach the belt from the pulley on the upper side of the CD changer unit (Do not stain the belt with grease).

2.

Disconnect the card wire from the pickup unit connector on the under side of the CD changer unit.

Attention : Solder is put up before the card wire is removed from the pick-up unit connector on the CD mechanism assembly. (When the card wire is removed without putting up solder, the CD pick-up unit assembly might destroy.)

3.

Disconnect the motor wire harness from connector on the CD servo board.

4.

Remove the screw C attaching the switch board and release the two tabs e attaching the switch board outward and detach the switch board.

5.

Remove the two screws D attaching the CD servo board and . First release the two tabs f and two tabs g attaching the CD servo board motor to raise the CD servo board slightly, then release the CD servo board.

Tabs e

C

Switch board

CW3

CD changer unit

Fig.9

CD servo board

D

Tabs g

Soldered parts

CD mechanism board

motor connecter

Pickup unit connector

MX-G500R

Belt

Motor

Tabs f

If the tabs f and g are hard to release, it is recommendable to unsolder the two soldered parts on the motor terminal of the CD servo board.

Soldering

Card wire

Picup unit connector

Fig.10

1-13

MX-G500R

Removing the CD mechanism holder assembly (mechanism included)

(See Fig.11 to 14)

1.

Disconnect the harness from connector on the CD mechanism board in the CD mechanism assembly on the under side of the CD changer unit. Disconnect the card wire from the pickup unit connector.

Attention : Solder is put up before the card wire is removed from the pick-up unit connector on the CD mechanism assembly. (Refer to Fig.10) (When the card wire is removed without putting up solder, the CD pick-up unit assembly might destroy.)

Motor connecter

CD changer unit

CD mechanism holder assembly

Pickup unit connector

2.

Remove the screw E attaching the shaft on the right side of the CD mechanism holder assembly. Pull outward the stopper fixing the shaft on the left side and remove the CD mechanism holder assembly from behind in the direction of the arrow y.

3.

Turn the CD mechanism holder assembly half around the lift up slide shaft h of the CD mechanism holder assembly until the turn table is reversed, and pull out the CD mechanism holder assembly.

Lift up slide shaft

Fig.11

E

Stopper

CD mechanism holder assembly

Fig.12

Lift up slide shaft n

1-14

CD mechanism holder assembly

Fig.14

y

CD mechanism holder assembly

Fig.13

MX-G500R

•

Removing the CD mechanism holder from the CD chager unit. (Refer to "Removing the CD mechanism holder assembly" )

Removing the pickup unit (

1. Removing the cut washer on the feed gear sleeve and pull out the feed gear.

2. Remove the two screws A fixing the pickup shaft.

3. Removing the pickup unit.

Removing the motor board

1. Unsolder the motor terminal on the motor board.

2. Remove the moter board.

Removing the feed motor (

Remove the two motor fixing screws at B and removing the feed motor.

See Fig.1)

(See Fig.2)

See Fig.1)

A

Motor board

Shutter

Cut washer

B

Fig.1

Unsolder

Pickup unit

Feed Gear

Feed motor

Shaft

A

Removing the spindle motor

The spindle motor cannot be removed as a single unit. When removing the spindle motor, change the chasis and turntable together as aunit.

Spindle motor

Unsolder

Fig.2

1-15

MX-G500R

Removing the record/playback mechanism.

Removing the R/P head.

1. Remove the screw A on the right side of the R/P head.(Fig.1, Fig.2)

2. Remove the screw B on the left side of the R/P head.(Fig.1, Fig.2)

Remove the erase head.

Remove the screw C fixing the erase head.(Fig.1)

Removing the pinch roller.

1. Pull out the pinch roller by opening the pinch roller stopper outward to unlock .(Fig.3)

2. When reassembling the pinch roller, refer to fig. 4 to hook up the spring.

R/P Head

E. Head

Stoppsr

A

B

C

Fig.1

B

Pinch roller assembly

A

Spring

Pinch roller

Return spring

R/P Head

Fig.2

Pinch roller

Fig.3

Pinch roller

stopper

Pinch roller

spring

1-16

Return spring

Fig.4

MX-G500R

Removing the motor.

1. Remove the two screws D fixing the motor. Be careful to grease's splash when the

drive belt comes off.(Fig.5, Fig.6)

2. Unsolder the motor terminal.(Fig.5)

Removing the mechanism board.

1.

coil terminal.(Fig.5)

2. Remove the two screws E fixing the board.(Fig.5)

Removing the flywheel.

capstan shaft, then remove the flywheel. When reassembling the flywheel, be sure to use new washers as they cannot be reused.(Fig.8, Fig.9)

Unsolder the four parts a on the solenoid

3. Unhook the three parts b from the board.(Fig.5)

4. Remove the mechanism board.(Fig.5)

Remove the cut-washers at c and d from the

Mecha.

a

Drive belt (Flat)

board

E

terminal

b

Motor

D

Fig.5

Fig.6

E

Drive belt

Motor

Drive belt

b

a

Sleeve

Flywheel

c

Washer

Sleeve

d

FR belt

Capstan

washer

Flywheel

Fig.7

FR belt

Fig.8Fig.9

Capstan

washer

Flywheel

1-17

MX-G500R

< Speaker section >

It is exchange in a unit. Please do not decompose as much as possible.

Removing the side panel (See Fig. 1)

1.

Remove the five screws A attaching the side panel and remove the side panel.

NOTES : It will be good to use the tool with a flat tip, since a boss's portion is pasted with adhesives. Please take care not to damage the cabinet at this time.

Removing the side speaker

(See Fig. 2 and 3)

A(long wood screw)

A(short wood screw)

Side panel

Fig.1

Side speaker

Boss and adhesion

A(long screw)

Boss and

adhesion

Front panel

Prior to performing the following procedure, remove the side panel.

1.

Remove the four screws B attaching the side speaker.

2.

Pull out the side speaker and remove the speaker cord from the speaker terminal.

B

Fig.2

1-18

Side speaker

Speaker terminal

Fig.3

MX-G500R

Wiring connection

Amp. board

0

ACW2

ACW1

3809-001224

Power /CD switch board

UCW1

3809-001228

UCW7

9

0

3809-001315

Front key switch board

2

PJ2

AH39-00045A

9 0

AH39-00244A

AH39-00245A

UCW2

FL dispaly & system control board

UCW3

P/T

SUB

PJ3

PCW1

RCW5

RCW1

RFS5

UCW4

RFS2

RFS6

RFS7

UCW5

ECO board

RFS8

UCW6

ECW1

9

0

Power transformer

AH39-20561P

3809-001121

CD mechanism

CW2

CW1

CW3

0

3809-001185

9

Color codes are shown below. 1 Brown 2 Red 3 Orange 4 Yellow 5 Green 6 Blue 7 Violet

9

8 Gray 9 White 0 Black

AAN1

0

2

AH38-12001A

CW102

CW103

9

CW101

CW104

CW3

0

CW105

CW107

CW106

0

9

0

AH39-00249B

2

3809-001034

2

0

9

0

AH39-00060A

AH39-00096D

CD servo board

0

9

8

2

3809-001184

3809-001223

Tuner board

JW1

0

FCW1

OCW

9

0

RCW6

FCW2

Main board

HCW3

JCW1

FCW3

JCW2

FCW3

0

9

RW2

0

9

0

9

RW1

2

0

2

9

0

HCW2

AH39-00247A

9

Headphone J.board

AH39-00022A

2

9

0 9

0

2

0

88

9

0

AH39-20002D

8

9

2

9

1-19

MX-G500R

Adjustment method

1. Tuner

ITEAM

Received FREQ. Adjustment

point

Output

* Adjustment Location of Tuner PCB

AM(MW) OSC Adjustment

522~1629 KHz

MO

1~7.0V

MAIN PCB

AM(MW) RF Adjustment

594 KHz

MA

Maximum Output(Fig.1)

VT

GND

LW OSC Adjustment

144~288 KHz

LO

2~7.0V

TESTER

LW RF Adjustment

150 KHz

LA

Maximum Output(Fig.1)

1-20

Fig.1 OSC Voltage

FM THD Adjustment

MX-G500R

SSG FREQ.

98 MHz

Adjustment point

FM DETECTOR COIL

(FM DET)

Output

60 dB

Minumum Distortion (0.4% below) (Fig.2)

FM Search Level Adjustment

SSG FREQ. Adjustment

point

(SVR1)

BEACON SENSITIVITY SEMI-VR(20K

98 MHz

Output GND

FM S.S.G

FM Antenna Terminal

SET

Oscilloscope

Input

Speaker Terminal

output

Input

Distortion Meter

Fig.2 IF CENTER and THD Adjustment

28 dB

)

FM Antenna

SET

Output

28 dB(

2dB)

Adjust SVR1 so that "TUNED" of FLT is lighted (Fig.3)

*Adjust FM S.S.G level to 28dB

AM(MW) I.F Adjustment

SSG FREQ. Frequency

450 kHz 522 kHz

Adjustment point

AM IF

Maximum output (Fig.4)

FM S.S.G

GND

FM IN

Fig.3 FM Auto Search Level Adjustment

60cm

OUTPUT

AM SSG 450KHZ

AM ANT IN

20 k

AM IF

Speaker Terminal

INPUT

VTVM Oscilloscope

OUTPUT

Fig.4 AM I.F Adjustment

1-21

MX-G500R

2. Cassette Deck

To adjust tape speed

Notes

1) Measuring tape: i) VT-712/MTT-111(or equivalent) (Tapes recorded with 3kHz) ii) AC-225/MTT-5512(or equivalent)

2) Connect the cassette deck to the frequency counter as in fig.1.

Cassette Deck

SPK OUT

Frequency Counter

output

Fig.1

Pre-Setup Condition

NOR

1 3KHz

SPEED Control

OUT (connected to the frequencycounter)

1) Deck 1:VT-712

2) Press PLAY SW button

To Adjust

Turn VSR1 to left and right (FRONT PCB)

3) Deck 2:Same as above

To adjust plabyback level/REC

Notes

1) Before the actual adjustment, clean the play/recording head.

2) Measuring tape : i) VT-703/MTT-114N(or equivalent 10kHz AZIMUTH control)

ii) AC-225/MTT-5512(or equivalent)

3) The cassette deck is connections as shown in fig.2.

Cassette Deck

SPK OUT

(GND)

Fig.2

VTVM

In Out

RemarkStandardPre-SetupItemStep

1%

range

Oscilloscope

1. Adjust Deck 1 Play Level

Pre-Setup Condition

AZIMUTH1 SPK OUT

(VTVM is connected to the scope)

1-22

After putting VT-703 into Deck 1

- Press FWD PLAY button.

To Adjust

Turn the control screw to as shownin Fig.3.

Max output and same phase (both channels)

RemarkStandardPre-SetupItemStep

After adjustment secure it with REGION LOCK.

2. Adjust Deck 2 Play Level/REC BIAS

MX-G500R

2

AZIMUTH1

Recording Bias Voltage

Pre-Setup Condition

SPK OUT (VTVM is connected to the scope)

Fig.4

Recording /Play head

After putting VT-703 into Deck 2

1)Press FWD PLAY button.

After putting AC-225 into Deck 2

1)Press REC PLAY button.

2)MAIN PCB JCW3, connectted to VTVM

To Adjust

Turn the control screw to as shown in Fig.3.

Turn JSR2L, JSR2R to the right and left

Max output and same phase (both channels)

7mV(

0.5mV)

RemarkStandardPre-SetupItemStep

After adjustment secure it with REGION LOCK.

AZIMUTH control screw

Audio OSC.

Fig.3

AUX IN

SET (MAIN PCB)

LINE OUT

IN

TP

JCW3

Fig.4

VTVM

IN OUT

Oscilloscope

1-23

MX-G500R

Flow of functional operation until TOC read

Power ON

Play Key

RESET a CD LSI

Check Point

Confirm that the voltage at the pin17 of KB9226(IC101) is "L" "H".

LIMIT SW ON

SET Default value of TE gain, TE balance

Automatic adjusting of

focus bias

Automatic adjusting of

FE offset

Automatic adjusting of

TE offset

LASER power ON

Detection of disk

Confirm that the voltage at the pin33 of KB9226(IC101) is "H" "L" "H".

Confirm that the voltage at the pin37 of KB9226(IC101) is 3.5V.

Tracking error waveform at TOC reading

Pin 34 of KB9226 (IC101)

2.50V

Approx

0.4V

Disc states to rotate

Approx.3.7sec

Disc is rotated

Automatic adjusting of

TE balance

Automatic adjusting of

TE gain

TOC reading

Play a disc

Confirm that the signal from pin24 of KB9226(IC101) is 3.5V as a accelerated pulse during approx.1.96s.

Confirm the waveform of the Tracking error signal at the pin 34 of KB9226(IC101).

Confirm the eye-pattern at the pin2 of KB9226(IC101).

1-24

Maintenance of laser pickup

MX-G500R

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

(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.

(2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear.

1. The level of RF output (EFM output : amplitude of eye pattern) will below.

Is the level of

RF OUT under

1.1V 0.2Vp-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.

Check the eye-pattern at TP1.

Finish.

1-25

MX-G500R

Troubleshooting

1. Amplifier

Power malfunction

No output

1-26

2.Tuner malfunction (FM/AM)

MX-G500R

3.Tape

HA12235F

JIC1(HA12235F) PIN5,26

3,4,27,28

16

JC63L,JC63R,JR65L,JR65R

1-27

MX-G500R

4.CD

1-28

Description of major ICs

KA3082 (IC401, IC402) : DC motor driver

1.Pin layout

DRIVER OUT

PRE DRIVER

MX-G500R

BIAS

1234

GND

O1

V

Z1

V

CTL

2.Pin function

Pin No.

1 2 3 4 5 6 7 8 9

10

Symbol

GND

VO1

VZ1

VCTL

VIN1

VIN2 SVCC PVCC

VZ2

VO2

I/O

-

O

I I I

-

O

LOGIC SWITCH

5

V

IN1

678910

V

IN2

Function Ground Output 1 Phase compensation Motor speed control Input 1 Input 2 Supply voltage (Signal) Supply voltage (Power) Phase compensation Output 2

SV

CC

TS

D

PV

CC

Z2

V

O2

V

74HCU04 (OIC1) : Optical

1.Pin layout

1A 1 14 Vcc

1Y 2 13 6A 2A 3 12 6Y

2Y 4 11 5A 3A 5 10 5Y

3Y 6 9 4A

GND 7 8 4Y

04U

1-29

MX-G500R

5L9290 (IC201) : Digital signal processor for CDP

1. Pin layout

RCHOUT

VSSA_DAC

VREF

VHALF

VDDA_DAC

LRHOUT

VDDA_PLL

48 47 46 45 44 43 42 41 40 39 38 37

VSSD_DAC

VDDD_DAC

SADTI

LRCKI

BCKI

2. Block diagram

VSSA_PLL

VCO1LF

VSSD_PLL

VDDD_PLL

VDDD1_5V

XIN

XOUT

VSSD1_5V

EFMI

LOCK

SMEF

SMON

1

2

3

4

5

6

7

8

9

10

11

12

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

SMDS

WDCK

S5L9290X

DSP+DAC

48-LQFP-0707

LKFS

TESTV

LKFS

RESETB

MLT

MDAT

SOS1 SQCK SBCK

SQDT SBDT

MCK

ISTAT

C2PO

S0S1

SQCK

36

35

34

33

32

31

30

29

28

27

26

25

DATX

BCKO

LRCKO

SADTO

DATX

C2PO

JITB

SBCK

VDDD3-5V

VSSD2-3V

VDDD2-3V

MUTE

SQDT

VCO1LF

EFMI

LOCK

SMEF SMDP SMDS

WDCK

WFCK

RFCK

C4M

XIN

ISTAT

MLT

MDAT

MCK

MUTE

DPLL

CLV

Servo

Timing

Generator

Micom

Interface

Subcode

Out

EFM

Demodulator

ECC

16K

SRAM

Address

Generator

JITB

Interpolator

Interface

SADTO LRCKO

BCKO

I/O

Digital

Out

SADTI LRCKI

BCKI

Digital

Filter

1-bit

DAC

PWM

LPF

LCHOUT

RCHOUT

VHALF

VREF

1-30

3. Pin function

MX-G500R

NO.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 28 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

Symbol VSSA_PLL VCO1LF VSSD_PLL VDDD_PLL VDDD1-5V XIN XOUT VSSD1 EFMI LOCK SMEF SMDP SMDS WDCK TESTV LKFS C4M RESETB MLT MDAT MCK ISTAT S0S1 SQCK SQDT MUTE VDDD2-3V VSSD2 VDDD3-5V SBCK JITB C2PO DATX SADTO LRCKO BCKO BCKI LRCKI SADTI VSSD_DAC VDDD_DAC RCHOUT VSSA_DAC VREF VHALF VDDA_DAC LCHOUT VDDA_PLL

I/O

-

O

-

I

O

I

O O O O O

I

O O

I I I I

O O

I

O

I

-

I

O O O O O O

I I I

-

O

-

O O

-

O

-

Function Analog Ground for DPLL Pump out for VCO1 Digital Ground Separated Bulk Bias for DPLL Digital Power Separated Bulk Bias for DPLL (3V Power) Digital Power (5V Power, I/O PAD) X'tal oscillator input (16.9344MHz) X'tal oscillator output Digital Ground (I/O PAD) EFM signal input CLV Servo locking status output LPF time constant control of the spindle servo error signal Phase control output for Spindle Motor drive Speed control output for Spindle Motor drive Word clock output (Normal Speed : 88.2KHz, Double Speed : 176.4KHz) Various Data/Clock Input The Lock status output of frame sync

4.2336MHz clock output System Reset at 'L' Latch signal input from Micom Serial data input from Micom Serial data receiving clock input from Micom The internal status output to Micom Subcode sync signal(S0+S1) output Subcode-Q data transfering bit clock input Subcode-Q data serial output System mute at 'H' Digital Power (3V Power, Internal Logic) Digital Ground (Internal Logic) Digital Power (5V Power, I/O PAD) Subcode data transfering bit clock Internal SRAM jitter margin status output C2 pointer output Digital audio data output Serial audio data output (48 slot, MSB first) Channel clock output Bit clock output Bit clock input Channel clock input Serial audio data input (48 slot, MSB first) Digital Ground for DAC Digital Power for DAC (3V Power) Right-Channel audio output through DAC Analog Ground for DAC Referance Voltage output for bypass Referance Voltage output for bypass Analog Power for DAC (3V Power) Left-Channel audio output through DAC Analog Power for PLL (3V Power)

1-31

MX-G500R

KB9226 (IC101) : RF amp. & servo signal processor

1. Pin layout

36 35 34 33 32 31 30 29 28 27 26 25

LD

37

PD

38 39

PDAC

40

PDBD

41

PDF

42

PDE

43

DCB

44

MCP

45

DCCI

46

DCCO

47

VREF

48

EQC

TEIO

LPFT

ATSC

EQI

RFO

RFM

1 2 3 4 5 6 7 8 9 10 11 12

FEO

FEM

GND

TZC/SSTOP

S1L9226X

EFMI

VCC

EQO

FRSH

TEO

FSET

TEM

FLB

SLP

FGD

FSI

SLO

SLM

SPO SPM

ASY

EFM

LOCK

WDCK

CLVI

RESET

MLT

MDATA

MCK

ISTAT

TGU

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

2. Block diagram

4

EQO

EFMI

5

45

DCCI

DCC0

46

MCP

44

DCB

43

VCC/

6

VDD

7

FRSH

8

FSET

FLB

9

FGD

10

11

FSI

EQI

RFO

RFM

RF AGC & EQ

Control

Focus OK Detect

Defect Detect Mirror

Gen

Focus Servo Loop

- Gain & Phase Compensation

- Focus Search

- Offset Adjust

- FZC Gen.

EQC

VREF

Center

Voltage

APC. Laser

Control &

LPC

Tracking Servo Loop

- Gain & Phase Compensation

- Track Jump

- Offset Adjust

- TZC Gen.

Hardware Logic

- Auto-Sequencer

- Fast Search

- Febias, Focus Servo, Tracking Offset ADJ.

- Tracking Balance & Gain Adjust

- Interruption Detect

- EFM Muting System

PDE

41 40424748123

Tracking Error

(RW)

I/V AMP

PDF

PDBD

39

RF & Focus

Error (CD-RW)

I/V AMP

Sled Servo &

Kick Gen

PDAC

38 37

35 34

33 36

29 28

27 26 25

29

30

PD LD

LPFT TEIO

TZC& SSTOP

ATSC

TEO TEM

SLP SLO SLM

FEO

FEM

1-32

TGU

12

Micom Data Interface Logic Decoder

1413 15 16 17 19 18 20 22 21

ISTAT

MCK

MDATA

MLT

RESET

WDCK

CLVI

LOCK

EFM

Comparator

ASY

EFM

Spindle

Servo LPF

23

24

SPDLO

SPDLM

3. Pin function Pin No.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33

34 35 36 37 38 39 40 41 42 43 44 45 46 47

48

Symbol RFM RFO EQI EQO EFMI VCC FRSH FSET FLB FGD FSI TGU ISTAT MCK MDATA MLT RESET CLVI WDCK LOCK EFM ASY SPM SPO SLM SLO SLP TEM TEO FEM FEO GND TZC/ SSTOP TEIO LPFT ATSC LD PD PDAC PDBD PDF PDE DCB MCP DCCI DCCO VREF EQC

Function

I/O

RF summing amp. inverting input

I

RF summing amp. output

O

RFO DC eliminating input(use by MIRROR, FOK ,AGC & EQ terminal)

I

RF equalizer output

O

EFM slice input. (input impedance 47K)

I

Main power supply

P

Capcitor connection to focus search

I

Filter bias for focus,tracking,spindle

I

Capacitor connection to make focus loop rising band

I

Terminal to change the hign frequency gain of focus loop

I

Focus servo input

I

Connect the component to change the high frequency of tracking Loop

I

Internal status output

O

Micom clock

I

Data input

I

Data latch input

I

Reset input

I

Input the spindle control output from DSP

I

88.2KHz input terminal from DSP

I

Sled run away inhibit pin (L: sled off & tracking gain up)

I

EFM output for RFO slice(to DSP)

O

Auto asymmetry control input

I

Spindle amp. inverting input

I

Spindle amp. output

O

Sled servo inverting input

I

Sled servo output

O

Sled servo noninverting input

I

Tracking servo amp.inverting input

I

Tracking servo amp. output

O

Focus servo amp. inverting input

I

Focus servo amp. output pin

O

Main ground

P

Tracking zero crossing input & Check the position of pick-up wherther inside or not

I

Tracking error output & Tracking servo input

B

Tracking error integration input (to automatic control)

I

Anti-shock input

I

APC amp. output

O

APC amp. input

I

Photo diode A & C RF I/V amp. inverting input

I

Photo diode B & D RF I/V amp. inverting input

I

Photo diode F & tracking(F) I/V amp. inverting input

I

Photo diode E & tracking(E) I/V amp. inverting input

I

Capacitor connection to limit the defect detection

I

Capacitor connection to mirror hold

I

Output pin to connect the component for defect detect

O

Input pin to connect the component for defect detect

I

(VCC+GND)/2 Voltage reference output

O

AGC_equalize level control terminal & capacitor terminal to input in to VCA

I

MX-G500R

1-33

MX-G500R

LC72131(IC02) : PLL frequency synthesizer for electron alignment

1. Pin layout

1

XIN

2

CE

3

DI

4

CL

5

DO

6

BO1

7

BO2

8

BO3

9

BO4

10

I01

20 19 18 17 16 15 14 13 12 11

XOUT VSS AOUT AIN PD VDD FMIN AMIN I02 IFIN

2. Block diagram

1

20

14

13

2

3 4

5

15 19

CCB I/F

Power on Reset

Reference Driver

1 2

Swallow Counter 1/16,1/17 4bits

12bits Programmable Divider

Data Shift Register & Latch

Phase Detector Charge Pump

Unlock Detector

Universal Counter

16 17 18

11

3.Pin function

Symbol

XIN XOUT

FMIN

AMIN

Pin No.

1

20

14

13

Type

Xtal OSC

Local oscillator signal input

6

7

9

8

Functions

Crystal resonator connection (4.5MHz/7.2MHz)

Serial data input : FMIN is selected when DVS is set to 1. The input frequency range is from 10 to 160MHz. The signal is passed through a built-in divide-by-two prescaler and then supplied to the swallow counter. A1 though the range of divisor setting is from 272 to 65, 535, the actual divisor is twice the setting since there is also a built-in divide-by-two prescaler.

Serial data input : AMIN is selected when DVS is set to 0. Serial data input : When SNS is set to 1 : The input frequency range is form 2 to 40MHz The signal is supplied directly to the swallow counter. The range of divisor setting is from 272 to 65, 535 and the actual divisor will be the value set. Serial data input : When SNS is set to 0 : The input frequency ranges is from 0.5 to 10MHz. The signal is supplied directly to a 12-bit programmable divider. The range of divisor setting is from 4 to 4,095 and the actual divisor will be the value set.

1210

(1/2)

Circuit configuration

1-34

CE

2

Chip enable

Most be set high when serial data is input to the LC72131M (DI ), or when serial data is output (DO).

S

MX-G500R

3.Pin function

Symbol

CL

DI

DO

VDD

VSS

BO1

BO2

BO3

BO4

Pin No.

4

3

5

15

19

6

7 8

9

Type

Clock

Input data

Output data

Power supply

Ground

Output port

Functions

Used as the synchronization clock when serial data is input to the LC72131 (DI ), or when serial data is output (DO).

Inputs serial data sent from the controller to the LC72131M.

Output serial data sent from the LC72131M to the controller. The content of the output data is determined by the serial data DOCO to DOC2.

The LC72131M power supply (VDD=4.5 to 5/5V) The power on reset circuit operates when power is first applied.

The LC72131M ground.

Dedicated output pins The output states are determined by BO1 to BO4 in the serial data. 'Data"=0:Open =1:Low The pins go to the open state after the power-on reset. An 8Hz time base signal can be output from BO1 when TBC in the serial data is set to 1. Note that the ON impedance of the BO1 pin is higher than that of the other pins (BO2 to BO4)

(2/2)

Circut confguration

S

IO1

IO2

PD

AIN AOUT

10

12

16

17 18

I/O Port

Charge pump output

L.P.F amplifier Tr

Pins used for both input and output The input or output state is determined by bits IOC1 and IOC2 in the serial state. 'Data"=0:Input port =1:Output port When specified for use as an input port : The input state is transmitted to the controller through the DO pin. 'Input state"=Low:data value 0 =High:data value 1 When specified for use as an output port : The output state is determined by bits IO1 and IO2 in the serial sate. 'Data"=0:Open =1:Low These pins go to the input port state after the power-on reset.

PLL Charge pump output When the frequency generated by dividing the Local oscillator frequency by N is higher than the reference frequency, a high level will be output from the PD in. similarly, when that frequency is lower, a low level will be output. The PD pin goes to the high impedance state when the frequencies agree.

The MOS transistor used for the PLL active Low-pass filter.

S

IFIN

11

IF counter

The input frequency range is from 0.4 to 12MHz. The signal is supplied directly to the IF counter. The result from the IF counter MBS is output through the DO pin. There are four measurement periods: 4, 8, 32 or 64ms.

1-35

MX-G500R

LC86P6548 (UIC1) : Microcontroller

1.Pin layout

S47/PF7

S46/PF6

S45/PF5

S44/PF4

S43/PF3

S42/PF2

S41/PF1

S40/PF0

VDD4

S39/PE7

S38/PE6

S37/PE5

S36/PE4

S35/PE3

S34/PE2

S33/PE1

S32/PE0

S31/PD7

S30/PD6

S29/PD5

S28/PD4

S27/PD3

S26/PD2

S25/PD1

S24/PD0

S23/PC7

S22/PC6

S21/PC5

S20/PC4

VP

2.Block diagram

S48/PG0 S49/PG1 S50/PG2 S51/PG3

P00 P01 P02

P03 VSS2 VDD2

P04

P05

P06

P07

P10/SO0

P11/SI0/SB0

P12/SCK0

P13/SO1

P14/SI1/SB1

P15/SCK1

81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100

Interrupt Control

Standby Control

CF

RC

X’ta

l

8079787776757473727170696867666564636261605958575655545352

1234567891011121314151617181920212223242526272829

P30

P31

P32

P33

P34

P35

P36

P16/BUZ

P17/PWM0

Clock

Generator

P37

P70/INT0

RES

XT1/P74

CF1

VSS1

XT2/P75

CF2

VDD1

P80/AN0

IR

PLA

PROM Control

PROM(48KB)

P81/AN1

P82/AN2

P83/AN3

PC

P84/AN4

P85/AN5

P86/AN6

A15-A0 D7-D0 TA CE OE DAS

EC

P87/AN7

P71/INT1

P72/INT2/T0I

51

50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31

30

S0/T0

P72/INT3/T0I

S19/PC3 S18/PC2 S17/PC1 S16/PC0 VDD3 S15/T15 S14/T14 S13/T13 S12/T12 S11/T11 S10/T10 S9/T9 S8/T8 S7/T7 S6/T6 S5/T5 S4/T4 S3/T3 S2/T2 S1/T1

Base Time

SI

O0

O1

SI

Timer 0

er 1

Tim

ADC

INT0-3

Noise Filter

SIO Auto

transmissio

RAM

128 by

VFD

Controller

High voltage O

r

matic

s

te

utput

Bus Interface

n

Port 1

Port 3

Port 7

Port 8

ACC

B Register

C Register

A

PSW

RAR

RAM

Stack Poi nter

Port 0

Watchdog Timer

1-36

3. Pin function Pin No.

1 2 3

to

10 11 12 13 14 15 16 17 18 19

to

22 23

to

26 27 28 29 30

to

36 37

to

45 46 47

to

50 51 52

to

63 64

to

71 72 73

to

80 81

to

84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99

100

P16/BUZ

P17/PWM0

P70/INT0

XT1/P74 XT2/P75

P80/AN0 P83/AN3

P84/AN4 P87/AN7

P71/INT1 P72/INT2/T0I P72/INT3/T0I

S15/T15

S16/PC0 P19/PC3

S20/PC4 S31/PD7

S32/PE0 S39/PE7

S40/PF0 S47/PF7

S48/PG0 S51/PG3

P10/SO0

P11/SI0/SB0

P12/SCK0

P13/SO1

P14/SI1/SB1

P15/SCK1

Symbol

P30

to

P37

RES

VSS1

CF1 CF2

VDD1

to

S0/T0

to

S6/T6 S7/T7

to

VDD3

to

VP

to

VDD4

to

P00 P01 P02

P03 VSS2 VDD2

P04

P05

P06

P07

I/O

Function

I/O

Buzzer output

I/O

Timer 1 output (PWM0 output)

I/O

8bit input/output port Input/output in bit unit 15V withstand at N-channel open drain output

I/O

INT0 input /HOLD release/N-channel Tr. ouptput forwatchdog timer

I

Reset pin

I

32.768kHz crystal oscillation terminal XT1

I

32.768kHz crystal oscillation terminal XT2

-

Power pin (-)

I

Input pin for the ceramic resonator oscillation

O

Output pin for the ceramic resonator oscillation

-

Power pin (+)

I

4-bit input port Input /output in bit unit

O

I

INT1 input/HOLD release input

I

INT2 input/timer 0 event input

O

Output for VFD display controller segment/timing incommon

O

Output for VFD dis;lay controller segment/timing withinternal pull-down resistor in common Internal pull-down resistor output

-

Power pin (+)

I/O

Output for VFD display controller High voltage input port PC0 to PC3

-

Power pin (+) for the VFD output pull-down resist

I/O

Output for VFD display controller High voltage input port PC4 to PC7, PD0 to PD7

I/O

Output for VFD displaya controller segment High voltage input port PE0 to PE7

-

Power pin (+)

I/O

Output for VFD displaya controller segment High voltage input port PF0 to PF7

I/O

Output for VFD displaya controller segment High voltage I/O port PG0 to PG3

I/O

8-bit input/output port. Input for port0 interrupt. Input/output in nibble unit Input for HOLD release 15V withstand at N-channel open drain output

-

Power pin (-)

-

Power pin (+)

I/O

8-bit input/output port. Input for port0 interrupt. Input/output in nibble unit Input for HOLD release 15V withstand at N-channel open drain output

I/O

SIO0 data output SIO0 data input/bus input/output SIO0 clock input/output SIO1 data output SIO1 data input/bus input/output SIO1 clock input/output

8-bit input/output port Input/output can be specified in a bit unit

MX-G500R

1-37

MX-G500R

HA12235 (JIC1) : Audio signal processor

1. Block diagram

TEST

(Open for normal use)

IREF

GND

20

19

18

ALCDET 17

Vcc

16

A

MUTE ON/OFF

REC MUTE OFF/ON

15

14

(REC RETURN ON/OFF)

A/B 13

ALC ON/OFF

High/Normal

11

12

REC OUT(L)

NC

ALC(L)

REC IN(L)

NC

PB OUT(L)

TAI(L)

EQOUT(L)

PB-EQ(L)

PB-NF2(L)

21

22

23

24

2526

27

28

29

30

EQ

120/60

(Norm/High)

+

31

MUTE

AB

32

33

34

Return SW

35

ALC

Return SW

36

37

38

MUTE

AB

39

EQ

120/60

(Norm/High)

+

40

REC OUT(R)

10

9

NC

8

ALC(R)

7

REC IN(R)

6

NC

5

PB OUT(R)

4

TAI(R)

3

EQOUT(R)

2

PB-EQ(R)

1

PB-NF2(R)

2. Pin function

Pin No.

1 2 3 4 5 6 7 8

9 10 11 12 13 14

1-38

Symbol PB-NF2(R) PB-EQ(R) EQOUT(R) TAI(R) PBOUT(R) NC RECIN(R)

NC RECOUT(R) ALC ON/OFF High/Norm A/B MUTE ON/OFF

PB-NF1(L)

Function PB EQ feed back NAB output EQ output Tape input PB output NC pin REC-EQ input

NC pin REC output Mode control input Mode control input Mode control input Mode control input

AIN(L)

Pin No.

RIP

15

16 17 18 19

20 21 22 23 24 25 26

REC

IN(L)

Symbol REC MUTE OFF/ON Vcc

GND IREF

Test mode RECOUT(L) NC

RECIN(L) NC PBOUT(L)

GND

Return

Function Mode control input

Vcc pin

GND pin Equalizer reference current input Test mode pin REC output NC pin

REC-EQ input NC pin PB output

IN(R)

NC

AIN(R)

Pin No.

27 28 29 30 31 32 33 34 35 36 37 38 39 40

PB-NF1(R)

Symbol TAI(L) EQOUT(L) PB-EQ(L) PB-NF2(L) PB-NF(L) AIN(L) RIP BIN(L) REC-RETURN GND BIN(R) NC AIN(R) PB-NF1(R)

Function Tape input EQ output NAB output PB EQ feed back PB EQ feed back PB A deck input Ripple filter PB B deck input REC Return GND pin PB B deck input NC pin PB A deck input PB EQ feed back

M66010 (UIC2) : I/O control

1.Pin layout

MX-G500R

D0 D1

CLK

CS

Vcc

GND

D24 D23 D22 D21 D20 D19 D18 D17

GND

1 2 3 4 5

S

6 7 8

9 10 11 12 13 14 15 16

2.Block diagram

CLOCK INPUT CLK

SET INPUT S

CHIP SELECT CS

INPUT

SERIAL DATA DI

INPUT

DO DI CLK CS

S

D24 D23 D22 D21 D20 D19 D18 D17

D1 D2 D3 D4 D5 D6 D7 D8

D9 D10 D11 D12 D13 D14 D15 D16

3

6

4

2

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

Control circuit

D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 D16

Shift register 1

D24 D23 D22 D3 D2 D1

Q24 Q23 Q22 Q3 Q2 Q1

Parallel output latch

D24 D23 D22 D3 D2 D1

Q24 Q23 Q22 Q3 Q2 Q1

Shift register 2

DI

DO

GND GND

Vcc

5

DO SERIAL DATA

1

OUTPUT

32

D1

31

D2

30

D3

PARALLEL DATA I/O

10

D22

9

D23

8

D24

7

16

STK402-040 (AIC1)

1.Pin layout

STK402-040

1

15

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

CH1

NF

IN

NC

STK402-040

+

ch.1

_

Pre

Vcc

BIAS

CH1

VE

CH1

-VE

Vcc -Vcc

CH2 +VE

CH2

-VE

ch.2

Pre

-Vco

+ _

SUB

GND

CH2

NF

CH2

IN

1-39

MX-G500R

TDA7442D (FIC1) : Audio processor

1.Pin layout

R_IN3 R_IN2 R_IN1

L_IN1 L_IN2 V L_IN3 L_IN4

MUXOUTL

IN(L)

MUXOUT(R)

IN(R)

BIN(R)

BOUT(R)

BIN(L)

1 2 3 4 5 6 7 8 9 10 11 12 13 14

2.Block diagram

MUXOUT(L)

0.47

0.47 F

0.47

F

L-IN1

L-IN2

L-IN3

L-IN4

F

R-IN1

F

R-IN2

F

R-IN3

F

R-IN4

4

50K

5

50K

6

50K

7

50K

3

50K

2

50K

1

50K

28

50K

31.5dB control

MUXOUT(R)

+

2.2

+

2.2 F

28

R_IN4

27

LOUT

26

ROUT

25

AGND

24

S

CREF23 SDA

22

SCL

21

DIG-GND

20

TREBLE(R)

19

TREBLE(L)

18

PS1

17

LP

16 15

BOUT(L)

5.6K

100nF

BIN(L)

BOUT(L)

15

14

RB

FIX

BASS

I2C BUS DECODER + LATCHES

BASS

12

BIN(R) BOUT(R)

100nF 100nF

5.6K

FIX

VAR

RB

1319

79dB CONTROL

-

VAR

+

FIX

+

-

SPKR

MUTE

SPKR

MUTE

79dB CONTROL

D98AU947A

ATT

27

LOUT

21

SCL

22

SDA

20

DIG GND

ATT

26

ROUT

AMP

5.6nF

TREBLE-L

18

OFF

SURR

TREBLE

SURR

OFF

Vref

TREBLE-R

F

5.6nF

SYMULATED

-

L-R

+

100nF

RPS1

PS1 90Hz

MUSIC

PS1

17

LPF

9KHz

24 25 23

16 LP

1.2nF

OFF

V

S

SYMULATED

EFFECT

CONTROL

MUSIC/

SUPPLY

AGND

MIXING

CREF

22

F

IN(L)

98

30K

L+R

30K

1110

IN(R)

BA4560 (AIC3, AIC4, AIC5, AIC6, AIC7, FIC4, HIC1) : Dual op amp.

1.Pin layout

V

CC

8

OUT2

7

– IN2

6

+ IN2

5

1-40

OUT1

– IN1

+ IN1

V

1

2

1ch

+

–

3

EE

4

2ch

+

–

L4959 (RIC1) : Voltage regulator

1.Pin layout

MX-G500R

TAB CONNECTED TO PIN 6

2.Block diagram

2/10

V

S

EN 8V

EN 12V(a)

EN 12V(b)

8

7

5

REF GEN

11 10

9 8 7 6 5 4 3 2 1

D97AU716A

OUT 12V(a) V

S

OUT 8.6V EN 8.6V EN 12V(a) GND EN 12V(b) N.C. OUT 5.6V V

S

OUT 12V(b)

5.6V, 250mA

3

OUT 5.6V

REGULATOR

8.6V, 600mA

REGULATOR

9

OUT 8.6V

SWITCHED

12V, 800mA

REGULATOR

11

OUT 12V(a)

SWITCHED

12V, 1.3A

REGULATOR

1

OUT 12V(b)

SWITCHED

D97AU569C

3.Pin function

Pin Pins Description

1 OUT 12V (b) 12V/1.3A SWITCHED OUTPUT VOLTAGE 2V

S

3 OUT 5.6V 5.6V/250mA OUTPUT VOLTAGE 4 N.C. not connected 5 EN 12V (b) Enable 12V/1.3A SWITCHED OUTPUT VOLTAGE 6 GND Ground 7 EN 12V (a) Enable 12V/0.8A SWITCHED OUTPUT VOLTAGE 8 EN 8.6V Enable 8.6V/0.6A SWITCHED OUTPUT VOLTAGE 9 OUT 8.6 8.6V/0.6A SWITCHED OUTPUT VOLTAGE

10 V

S

11 OUT 12V (a) 12V/0.8A SWITCHED OUTPUT VOLTAGE

Supply Voltage

GND

6

1-41

MX-G500R

KA9258D (IC301) : 4-ch Motor driver

1.Block diagram

28 27 26 25 24 23 22 21 20 19 18 17 16 15

10K

T • S • D

+-

LEVEL SHIFT

10K

VCC VCC

10K

REGULATOR

10K

1 2 3 4 5 6 7 8 9 10 11 12 13 14

GND

10K

GND

10K

50K

MUTE

LEVEL SHIFT

-+

LA1837 (IC01) : FM IF/DET AM RF/IF/DET

1.Block diagram

1-42

< MEMO >

MX-G500R

1-43

MX-G500R

VICTOR COMPANY OF JAPAN, LIMITED

AUDIO & COMMUNICATION BUSINESS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan

(No.21098)

200204(V)