JVC MXGT-85-V, MXGT-88-V, MXGT-95-V, MXGT-98-V, MXG-75-V Service manual

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MX-GT98V/MX-GT95V MX-GT88V/MX-GT85V

MX-G78V/MX-G75V

Area suffix

Contents

SP-MXGT98V SP-MXGT95V

(No MIC jack and MIC LEVEL volume for UN ver.)

CA-MXGT98V CA-MXGT95V

SP-MXGT98V SP-MXGT95V

US -------- Singapore UN --------------Asean

COMPACT

DIGITAL AUDIO

COMPACT

DIGITAL VIDEO

Safety precautions Important for laser products Preventing static electricity Disassembly method Adjustment method

1-2 1-3 1-4 1-5 1-29

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

1-33 1-34 1-34 1-35~49

No.21026

Sep. 2001

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.

2. Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturer's warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.

3. Many electrical and mechanical parts in the products have special safety-related characteristics. These

characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.

4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.

5. Leakage current 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 measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.).

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 must be made in accordance with the relevant safety standards.

4. It is essential that safety critical components are replaced by approved parts.

5. If mains voltage selector is provided, check setting for local voltage.

Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.

In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (Except the J&C version)

1-2

Important for laser products

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.

4.CAUTION : The compact disc player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. 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.

Position of labels

CLASS 1 LASER PRODUCT

WARNING LABEL

DANGER : Invisibie laser radiation when open and interlock or defeated. AVOID DIRECT EXPOSURE TO BEAM (e)

ADVARSEL :Usynlig laserstråling ved åbning , når sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling. (f)

VARNING : Osynlig laserstrålning är denna del är öppnad och spårren är urkopplad. Betrakta ej strålen. (s)

VARO : Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle.Älä katso säteeseen. (d)

1-3

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

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 traverse unit is decomposed

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

1. Remove the disk stopper and T. bracket on the CD changer mechanism assembly.

2. Disconnect the harness from connector on the CD motor board.

3. CD traverse unit is put up as shown in Fig.1.

4. Solder is put up before the card wire is removed from connector CN601 on the CD servo control board as shown in Fig. 2. (When the wire is removed without putting up solder, the CD pick-up assembly might destroy.)

5. Please remove solder after connecting the card wire with CN601 when you install picking up in the substrate.

CD changer mechanism

assembly

CD traverse

unit

Flexible cable

Fig.1

Soldering

Fig.2

1-4

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Disassembly method

Removing the metal cover

(See Fig.1 to 3)

1.

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

2.

Remove the two screws B on both sides of the body.

3.

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

CAUTION:

Do not break the front panel tab fitted to the metal cover.

A

Metal cover

A

Fig.1

B

Fig.2

Metal cover

B

Fig.3

1-5

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Removing the CD changer mechanism assembly (See Fig.4 and 6)

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

1.

Disconnect the wire from connector CN705 on the amplifier board.

2.

Remove the plastic rivet attaching the main board to the front assembly on the right side of the body.

3.

Disconnect the card wire from connector CN561 on the main board.

4.

Remove the two screws C on the upper side of the body and the two screws D on the back of the rear panel.

5.

Pull both the rear panel and the front panel assembly to the outside, then remove the CD changer mechanism assembly by lifting the rear part of the assembly.

REFERENCE:

At this point, one card wire on the underside of the CD mechanism assembly is still connected.

CD changer mechanism assembly

Rear panel

Amplifier board

CN705

Fig.4

Front panel assembly

C

Main board

CN561

CN504

Fig.5

Front panel assembly

C

CD changer mechanism assembly

Rear panel

6.

Disconnect the card wire from connector CN504 on the inner side of the main board on the right side of the body. Remove the CD mechanism assembly.

CAUTION:

To prevent damage to the CD fitting, be sure to pull both the rear panel and the front panel assembly enough to remove the CD changer mechanism assembly.

Removing the fan (See Fig.7)

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

1.

Turn over the CD changer mechanism assembly and remove the two screws E attaching the fan.

CD changer mechanism assembly

Plastic rivet

Main board

CN561

CN504

Front panel assembly

Fig.6

E

Rear panel

D

Fan

E

1-6

CD changer mechanism assembly

Fig.7

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Removing the front panel assembly

(See Fig.8 to 11)

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

1.

Disconnect the card wires from connector CN870, CN871 and CN315 on the main board respectively.

2.

Remove the wire clamp and disconnect the wire from connector CN703 on the amplifier board.

3.

Disconnect the wire from connector CN220 on the transformer board.

4.

Remove the two screws F on the bottom of the body.

5.

Release the two joints a on the lower right and left sides of the body using a screwdriver, and remove the front panel assembly toward the front.

Amplifier board

CN703

Transformer board

Wire clamp

CN220

Main board

CN870

CN871

CN315

Front panel assembly

Fig.8

F

(Bottom)

Front panel assembly

Fig.9

Joint a

Fig.10

Joint a

Front panel assembly

Fig.11

1-7

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Removing the tuner board

(See Fig.12)

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

1.

Disconnect the card wire from connector CN1 on the tuner board on the right side of the body.

2.

Remove the plastic rivet fixing the tuner board.

3.

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

Plastic rivet

CN1

Tuner board

Rear panel

G

Fig.12

Removing the rear cover / rear panel

(See Fig.13 to 16)

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

1.

Remove the screw H attaching the rear cover on the back of the body.

2.

Push each tab of the four joints b in the direction of the arrow and release.

3.

Remove the fifteen screws G attaching the rear panel.

4.

Disengage the joints c on each lower side of the rear panel using a screwdriver and remove the rear panel backward.

Joint b

G

Rear cover

H

Fig.13

Rear panel

Joint b

Rear panel

G

1-8

Joint c

Rear panel

G

Fig.14

Rear panel

Fig.15Fig.16

G

Joint c

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Removing the main board

(See Fig.17 and 18)

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

1.

Disconnect the card wires from connector CN870, CN871 and CN315 on the main board.

2.

Disconnect the wires from connector CN704 and CN706 on the amplifier board.

3.

Remove the screw I attaching the main board on the right side ofthe body.

4.

Disconnect connector CN211 and CN212 on the main board from the regulator board.

CN315

Amplifier board

CN704 CN706

Front panel assembly

Main board

CN871

CN870

Fig.17

Front panel assembly

Main board

Removing the speaker board

(See Fig.19)

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

REFERENCE:

1.

Disconnect connector CN217 on the speaker board from the regulator board.

It is not necessary to remove the main board.

Regulator board

I

Fig.18

Fig.19

CN212

CN211

Speaker board

CN217

1-9

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Removing the power board (See Fig.20)

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

1.

Remove a wire clamp on the power board.

2.

Disconnect the wire from connector CN218, CN219 and CN250 on the power board.

3.

Disconnect connector CN251 on the power board from the regulator board.

Removing the amplifier board / voltage board / heat sink (See Fig.21 and 22)

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

1.

Disconnect the wires from connector CN703, CN704 and CN706 on the amplifier board respectively.

Power board

CN219

CN250

CN251

Wire clamp

Voltage board

CN218

Wire clamp

Fig.20

Amplifier board

CN704 CN706

Wire clamp

CN703

2.

Remove the two wire clamps attaching the wire to the amplifier board and the voltage board.

3.

Disconnect connector CN215 on the amplifier board and CN216 on the voltage board from the regulator board (The heat sink will be detached at once).

4.

Remove the four screws J attaching the amplifier board to the heat sink.

5.

Remove the two screws K, the board bracket and the voltage board.

REFERENCE:

It is not necessary to remove the power board.

Regulator board

Heat sink

Voltage board

K

CN216

CN215

Fig.21

Amplifier board

J

1-10

Fig.22

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Removing the power transformer assembly (See Fig.23 and 24)

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

1.

Disconnect the wires from connector CN218 and CN219 on the power board.

2.

Disconnect the wire from connector CN204 on the regulator board.

3.

Release the wire from the stopper on the regulator board.

4.

Remove the four screws L attaching the transformer assembly.

Removing the regulator board

(See Fig.25)

Prior to performing the following procedure, remove metal cover, CD changer mechanism assembly, rear panel, antenna board, main board, amplifier board, voltage board, power board and speaker board.

1.

Disconnect the wire from connector CN204 on the regulator board.

Regulator board

CN204

Stopper

CN219

Power board

CN218

Power transformer assembly

Fig.23

LL

Power transformer assembly

Fig.24

Regulator board

CN204

Stopper

2.

Release the wire from the stopper on the regulator board.

3.

Remove the two screws M attaching the regulator board.

Removing the power cord (See Fig.26)

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

1.

Disconnect the wire from connector CN250 on the power board.

2.

Remove the wire clamp from the power board.

3.

Move the power cord stopper upward and pull out it from the base chassis.

M

Power transformer assembly

Power board

CN250

Power cord stopper

Base chassis

Fig.25

Wire clamp

Fig.26

M

Regulator board

CN204

1-11

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

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

Removing the cassette mechanism assembly (See Fig.27)

1.

Disconnect the card wire from connector CN306 on the head amplifier & mechanism control board.

2.

Remove the seven screws N attaching the cassette mechanism assembly.

Removing the display system control board (See Fig.28 to 30)

1.

Remove the four screws O attaching the stay bracket.

2.

Disconnect the card wires from connector CN316 and CN880 on the display system control board.

Head amplifier & mechanismcontrol board CN306

N

Cassette mechanism assembly

N

Fig.27

O

3.

Remove the six screws P attaching the display system control board.

4.

If necessary, disconnect the wire from connector CN911 on the front side of the display system control board and unsolder FW915.

Removing the CD eject board

(See Fig.30 and 31)

1.

Remove the three screws Q attaching the CD eject board.

2.

If necessary, unsolder FW915 on the CD eject board.

CD eject board

FW915

(Solding)

Q

Display system control board

P

FW915

(Solding)

P

CN880

CN911

P

Stay bracket

Fig.28

CN316

P

Display system control board

Fig.29

CD eject board

FW915

1-12

Fig.31

Display system control board

Fig.30

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Removing the preset / tuning switch board (See Fig.32 and 33)

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

1.

Pull out the preset knob on the front panel.

2.

Remove the four screws R attaching the preset / tuning switch board.

3.

If necessary, unsolder FW901 on the preset / tuning switch board.

Removing the operation switch board

(See Fig.33 and 34)

Prior to performing the following procedure, remove the display system control board and the preset / tuning switch board.

1.

Pull out the volume knob on the front panel and remove the nut. Pull out the surround mode knob, the mic level knob and the surround woofer level knob toward the front.

R

Preset / tuning switch board

R

Fig.32

Preset knob

Surround mode knob

Surround woofer level knob

2.

Remove the thirteen screws S attaching the operation switch board. (CA-MXG75V / MXG78V, CA-MXGT85V / MXGT88V)

Remove the twelve screws S attaching the operation switch board. (CA-MXGT95V / MXGT98V)

3.

Release each tab of the seven joints g retaining the operation switch board.

Joints g

S

Joint g

S

Operation switch board

S

Joint g

S

Volume knob

Joints g

Mic level knob

Nut

Fig.33

S

Operation switch board

S

Joints g

(CA-MXGT95V / MXGT98V)

S

Fig.34

S

Joint g

S

Joints g

CA-MXG75V / MXG78V

CA-MXGT85V / MXGT88V

S

Fig.34

S

Joint g

1-13

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

<Speaker section> [for MX-GT98V/MX-GT95V]

Removing the front panel

(See Fig.1 and 2)

1.

Remove the four screws A attaching the front panel on the front of the body.

A

2.

Pull out the front panel toward the front and disconnect the wire from the two speaker terminals of the speaker (tweeter) on the back of the front panel.

Removing the speaker (tweeter)

(See Fig.3)

Prior to performing the following procedures, remove the front panel.

1.

Remove the two screws B attaching the speaker (tweeter) on the back of the front panel.

Removing the sub panel (See Fig.4)

Prior to performing the following procedures, remove the front panel.

1.

Remove the six screws C attaching the sub panel on the back of the front panel.

A

Front panel

A

Fig.1

Speaker (tweeter)

2.

Pull out the sub panel toward the front.

C

Front panel

Fig.4

C

Speaker (tweeter)

C

Speaker terminals

Front panel

Fig.2

Sub panel

B

Speaker (tweeter)

Fig.3

1-14

Removing the speaker (squawker)

(See Fig.5)

Prior to performing the following procedures, remove the front panel.

1.

Remove the four screws E attaching the speaker (squawker) on the front of the body.

2.

Disconnect the wire from the two speaker terminals of the speaker (squawker).

Removing the speaker (woofer)

(See Fig.6 and 7)

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Speaker (squawker)

E

Prior to performing the following procedures, remove the front panel.

1.

Remove the eight screws D attaching the punch panel on the front of the body.

2.

Remove the six screws F attaching the speaker (woofer) on the front of the body.

3.

Remove the speaker (woofer) toward the front and disconnect the wire from the two speaker terminals.

Removing the duct (See Fig.8)

1.

Remove the four screws G attaching the duct on the upper side of the body.

2.

Move the duct upwards and pull out backward.

D

Fig.5

Speaker (squawker)

D

Punch panel

Fig.6

Speaker (woofer)

Front panel

Duct

G

F

Fig.7Fig.8

1-15

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

[for MX-GT88V/MX-GT85V]

Removing the front panel (See Fig.1)

1.

Remove the four screws A attaching the front panel on the front of the body.

2.

Pull out the front panel toward the front.

Removing the supeaker (tweete)

(See Fig.2)

Prior to performing the following procedures, remove the front panel.

1.

Remove the two screws B attaching the speaker (tweeter) on the front of the body.

2.

Disconnect the wire from two speaker terminals of the speaker (tweeter).

AA

Front panel

AA

Fig.1

B

Removing the speaker (squawker)

(See Fig.3)

Prior to performing the following procedures, remove the front panel.

1.

Remove the four screws C attaching the speaker (squawker) on the front of the body.

2.

Disconnect the wire from the two speaker terminals of the speaker (squawker).

Speaker (squawker)

Spealer (tweeter)

Fig.2

Speaker (squawker)

C

1-16

Fig.3

Removing the speaker (woofer)

(See Fig.4 and 5)

Prior to performing the following procedures, remove the front paenel.

1.

Remove the six screws D attaching the punch panel on the front of the body.

2.

Remove the four screws E attaching the speaker (woofer) on the front of the body.

3.

Pull out the speaker (woofer) toward the front and disconnect the wire from the two speaker terminals.

Removing the sub panel (See Fig.6 )

D

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Punch panel

D

Prior to performing the following procedures, remove the front panel.

1.

Remove the six screws F attaching the sub panel on the back of the front panel

2.

Remove the sub panel toward the front.

.

Removing the duct (See Fig.7)

1.

Remove the four screws G attaching the duct on the upper side of the body.

2.

Move the duct upwards and pull out backward.

Fig.4

Speaker (woofer)

EE

Fig.5

Sub panel

Front paenl

Duct

G

F

Front paenl

F

Fig.6Fig.7

1-17

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

[for MX-G78V/MX-G75V]

Removing the side cover (See Fig.1)

1.

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

Removing the squawker speaker

(See Fig.2)

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

1.

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

2.

Disconnect the red and black wires from the speaker terminals on the squawker speaker.

A

Side cover

A

Fig.1

B

Removing the front cover (See Fig.3 to 5)

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

1.

Pull out the saran net toward the front while disengaging the four joints a.

2.

Remove the two screws C and D respectively.

3.

Remove the front cover toward the front and disconnect the yellow and black wires from the two tweeter speaker terminals.

CC

Front cover

Squawker speaker

B

Fig.2

1-18

Fig.4

Joints a

DD

Saran net

Fig.3

Removing the woofer speaker (See Fig.6)

Prior to performing the following procedure, remove the side cover and the front cover.

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Tweeter speaker

Fig.5

1.

Remove the four screws E on the front of the body.

2.

Pull out the woofer speaker toward the front and disconnect the wire (yellow and black,blue and black) from the two speaker terminals.

Removing the tweeter speaker

(See Fig.7)

Prior to performing the following procedure, remove the side cover and the front cover.

1.

Remove the two screws F attaching the tweeter speaker on the back of the front cover.

E

Woofer speaker

Fig.6

F

Tweeter speaker

Front cover

Fig.7

1-19

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Removing the CD Servo control board (See Fig.1)

1.Remove the metal cover.

2.Remove the CD changer mechanism assembly.

3.From bottom side the CD changer mechanism assembly, remove the four screws A retaining the CD servo control board.

4.Absorb the four soldered positions "a" of the right and left motors with a soldering absorber.

5.Pull out the earth wire on the CD changer mechanism assembly.

6.Disconnect the connector CN854 on the CD servo control board.

7.Disconnect the card wire CN601 and the connector CN801 on the CD servo control board.

A

a

CN854

A

CN651

CD servo control board

CN652

CN801

CN601

CN151

Removing the CD tray assembly (See Fig.2~4)

Remove the front panel assembly.

1. Remove the CD changer mechanism assembly.

2. Remove the CD Servo control board.

3. Remove the screw B' retaining the lod stopper.

4. From the T.bracket section "b" and clamper base

5. section "c" , remove both of the edges fixing the rod(See Fig.2 and 3). Remove the screw B retaining the disc stopper

6. (See Fig.3). Remove the three screws C retaining the T.bracket

7. (See Fig.3). Remove the screw D retaining the clamper assembly

8. (See Fig.3). From the left side face of the chassis assembly, remove

9. the one screw E retaining both of the return spring and lock lever(See Fig. 4).

10.

By removing the pawl at the section "d" fixing the return spring, dismount the return spring(See Fig.4).

11.

Remove the three lock levers(See Fig.4).

T.Braket

Disc stopper

B

Earth

wire

Fig.1

A

Clamper base

A

b

Rod

c

T.Braket

Fig.2

d

CC

B'

a

Lod stopper (C/J version only)

C

D

b

Lock lever

Clamper ass'y

1-20

Fig.3

Return spring

E

Fig.4

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

11.

Check whether the lifter unit stopper has been caught into the hole at the section "e" of CD tray assembly as shown in Fig.5. Make sure that the driver unit elevator is positioned as

12. shown in Fig.6 from to the second or fifth hole on the left side face of the CD changer mechanism assembly.

[Caution]

13.

14.

15.

Chassis assembly

In case the driver unit elevator is not at above position, set the elevator to the position as shown in Fig.7 by manually turning the pulley gear as shown in Fig.8.

Manually turn the motor pulley in the clockwise direction until the lifter unit stopper is lowered from the section "e" of CD tray assembly(See Fig.8). Pull out all of the three stages of CD tray assembly in the arrow direction "f" until these stages stop (See Fig.6). At the position where the CD tray assembly has stopped, pull out the CD tray assembly while pressing the two pawls "g and g' " on the back side of CD tray assembly(See Fig.9). In this case, it is easy to pull out the assembly when it is pulled out first from the stage CD tray assembly.

Stopper

e

CD tray assembly

Fig.5

Refer to Fig.7

Pulley gear

Pawl

Fig.6

CD tray assembly

g

CD

f

Drive unit of elevator

Fig.7

3

2

1

CD tray assembly

Motor pulley

Fig.8

Pawl ,

g

Fig.9

g'

1-21

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Removing the CD loading mechanism assembly(See Fig.10)

1.2.While turning the cams R1 and R2 assembly in the arrow direction "h" ,align the shaft "i" of the CD loading mechanism assembly to the position shown in Fig.10. Remove the four screws F retaining the CD loading mechanism assembly.

Removing the CD traverse mechanism (See Fig.11 and 12 )

For dismounting only the CD traverse mechanism

1.

without removing the CD loading mechanism assembly, align the shaft "j" of the CD loading mechanism assembly to the position shown Fig.11 while turning the cam R1 and R2 assembly in the arrow direction "k" . By raising the CD loading mechanism assembly in the

2.

arrow direction "l", remove the assembly from the lifter unit

Cam R1, R2 assembly

Cams R1, R2 assembly

Arrow

h

i

F

CD loading mechanism assembly

Fig.10

F

CD traverse mechanism

Arrow

j

Fig.11

Removing the CD pick unit (See Fig.13 )

1.

Move the cam gear in the arrow direction "m" . Then, the CD pickup unit will be moved in the arrow direction "n" . According to the above step, shift the CD pickup unit to

2. the center position. While pressing the stopper retaining the shaft in the

3. arrow direction "o" , pull out the shaft in the arrow direction "p". After dismounting the shaft from the CD pickup unit,

4. remove the CD pickup unit

1-22

k

Lifter unit

o

Stopper

Shaft

Fig.12

CD Pickup unit

n

m

Shaft

p

Stopper

Fig.13

Arrow

CD loading mechanism

Shaft

Cam gear

l

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Removing the try select switch board (See Fig.14)

1.2.Remove the two screws G retaining the tray select switch board. Disconnect the tray select switch board from connector CN804 on the CD servo control board.

Removing the cam unit (See Fig.15 ~17 )

1.

Remove the CD loading mechanism assembly.

2.

While turning the cam gear "q", align the Paul "r" position of the drive unit to the notch position(Fig.16) on the cam gear "q". Pull out the drive unit and cylinder gear(See Fig.17).

3. While turning the cam gear "q", align the Paul "s"

4. position of the select lever to the notch position(Fig.18) on the cam gear "q". Remove the four screws H retaining the cam unit(cam

5. gear "q" and cams R1/R2 assembly)(See Fig.18).

Chassis assembly

Drive unit

CN851

CN854

Fig.14

Cam gear

Tray select switch board

CN804

q

G

Drive unit

Cylinder gear

r

Cam gear

H

s

Fig.15

H

q

Cams R1, R2 assembly

Cam unit

J

Fig.16

Select lever

Fig.17

1-23

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Removing the actuator motor and belt (See Fig.18~21)

1.

Remove the two screws I retaining the gear bracket (See Fig.18).

2.

While pressing the pawl "t" fixing the gear bracket in the arrow direction, remove the gear bracket (See Fig.18). From the notch "u section" on the chassis assembly

3. fixing the edge of gear bracket, remove and take out the gear bracket(See Fig. 19). Remove the belts respectively from the right and left

4. actuator motor pulleys and pulley gears(See Fig. 18). After turning over the chassis assembly, remove the

5. actuator motor while spreading the four pawls "v" fixing the right and left actuator motors in the arrow direction(See Fig. 20).

[Note]

When the chassis assembly is turned over under the conditions wherein the gear bracket and belt have been removed, then the pulley gear as well as the gear, etc. constituting the gear unit can possibly be separated to pieces. In such a case, assemble these parts by referring to the assembly and configuration diagram in Fig. 21.

Chassis assembly

Pulley gear

Gear bracket

Belt

Motor pulley

I

Fig.18

Actuator motor

Pulley gear

Belt

Motor pulley

I

Pawl

t

u

Gear bracket

Fig.19

Assembly and Configuration Diagram

Pulley gear

Gear B

v

Fig.20

Pulley gear

Gear B

Cylinder gear

1-24

Gear C

Select gear

Gross gear L

Fig.21

Gross gear U

Gear C

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Removing the cams R1/R2 assembly and cam gear q(See Fig.22)

Remove the slit washer fixing the cams R1 and R2

1. assembly. By removing the two pawls "w" fixing the cam R1,

2. separate R2 from R1. Remove the slit washer fixing the cam gear "q".

3. Pull out the cam gear "q" from the C.G. base assembly.

4.

Removing the C.G. base assembly (See Fig.22 and 23)

Remove the three screws J retaining the C.G. base assembly.

[Caution]

To reassemble the cylinder gear, etc.with the cam unit (cam gear and cans R1/R2 assembly), gear unit and drive unit, align the position of the pawl "x" on the drive unit to that of the notch on the cam gear "q". Then, make sure that the gear unit is engaged by turning the cam gear "q" (See Fig. 24).

Slit washer

Cam gear q

J

Slit washer

Cam R2

Pawl

w

Cam R1

Cam switch board

C.G. base assembly

Pawl

w

Notch

Pawl

x

Cylinder gear

Drive unit

Fig.22

Cam gear q

Cam R1, R2 assembly

Gear unit

Gear bracket

Fig.23

1-25

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

< Cassette mechanism section >

Removing the playback,recording and eraser heads (See Fig.1~3)

1. While shifting the trigger arms seen on the right side of the head mount in the arrow direction,turn the flywheel R in counterclockwise direction until the head mount has gone out with a click (See Fig. 1).

2. When the flywheel R is rotated in counterclockwise direction, the playback / recording & eraser head will be turned in counterclockwise direction from the position in Fig.2 to that in Fig.3.

3. At this position, disconnect the flexible P.C.board (outgoing from the playback head) from the connector CN301 on the head amp. and mechanism control P.C. board.

4. Remove the flexible P.C.board from the chassis base.

5. Remove the spring "a" from behind the playback / recording head.

6. Loosen the reversing azimuth screw retaining the playback head.

7. Take out the playback head from the front of the head mount.

8. The recording and eraser heads should also be removed similarly according to Steps 1~7 above.

Flexible P.C.board

Cassette mechanism

Trigger armHead mount

Fig.1

Playback/Recording & eraser head

(Mechanism A side)

Flywheel R

Spring "a"

Trigger arm

Reassembling the playback, recording

and eraser heads (See Fig.3)

1. Reassemble the playback head from the front of the head mount to the position as shown in Fig.3.

2. Fix the reversing azimuth screw.

3. Set the spring a from behind the playback head.

4. Attach the flexible P.C.board to the chassis base as shown in Fig.3.

5. The recording and eraser heads should also be reassembled similarly according to Steps 1~4 above.

CN301

Head amplifier & mechanism control P.C. board

Fig.2

Playback head

Spring "a"

CN302

FPC holder

Fig.3

Flywheel R

(Mechanism A side)

Reversing azimuth screw

Head mount

Flexible P.C.board

Head amplifier & mechanism control P.C. board

(Mechanism B side)

1-26

Removing the head amp. and mechanism control board (See Fig. 4)

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

1.Remove the cassette mechanism assembly.

2.After turning over the cassette mechanism assembly,remove the five screws "A" retaining the head amplifier & mechanism control board.

3.Disconnect the connectors CN303 on the board and the connectors CN301 and on CN302 both the right and left side reel pulse boards.

4.When necessary, remove the 4pin parallel wire soldered to the main motor

Removing the capstan motor assembly

(See Fig.5 to 7)

1.Remove the six screws "B" retaining capstan motor assembly (See Fig. 5).

2.While raising the capstan motor, remove the capstan belts A and B respectively from the motor pulley (See Fig. 6).

Caution 1: Be sure to handle the capstan belts so carefully that these belts will not be stained by grease and other foreign matter. Moreover, these belts should be hand while referring to the capstan belt hanging method.(See Fig.6 and 7)

A

Flexible board

Head amplifier & mechanism control board

AA

CN303

CN302 CN301

Flexible board

Fig.4

BB

Capstan motor assembly

AA

Capstan belt A

Fig.5

Capstan motor

Capstan belt A

Capstan belt B

Motor pulley

Fig.7 Fig.6

BBBB

Capstan belt B

1-27

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Removing the capstan motor (See Fig. 8)

From the joint bracket, remove the two screws "C" retaining the capstan motor.

Removing the flywheel (See Fig. 9,10)

1.Remove the head amp. and mechanism control P.C.Board.

2.Remove the capstan motor assembly.

3.After turning over the cassette mechanism, remove the two slit washers "b" fixing the capstan shafts R and L, and pull out the flywheels R and L respectively from behind the cassette mechanism.

C

Capstan motor

Joint bracket

C

Fig.8

Flywheel R Flywheel L

Fig.10

Removing the reel pulse board and solenoid (See Fig. 11)

1.Remove the five pawls (c,d,e,f,g) retaining the reel pulse P.C.Board.

2.From the surface of the reel pulse P.C.Board parts, remove the two pawls "h" and "i" retaining the solenoid.

hi

Solenoid

c

a

d

Slit washer "a"

Fig.9

e

f

b

Slit washer "b"

Reel pulse board

g

1-28

Solenoid

Fig.11

Adjustment method

Measurement instruments required for adjustment

1. Low frequency oscillator, This oscillator should have a capacity to output 0dBs to 600ohm at an oscillation frequency of 50Hz-20kHz.

2. Attenuator impedance : 600ohm

3. Electronic voltmeter

4. Frequency counter

5. Wow flutter meter

6. Test tape VT703L : Head azimuth VT712 : For Tape speed and wow flutter ( 3kHz) VT724 : For Reference level (1kHz) VT703L : For Head angle(10kHz)

7. Blank tape TAPE : AC-225,

8. Torque gauge : For play and back tension Forward ; TW2111A, Reverse ; TW2121A Fast Forward and Rewind ; TW2231A

9. Test disc : CTS-1000(12cm),GRG-1211(8cm)

10. Jitter meter

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Radio input signal

AM modulation frequency : 400Hz Modulation factor : 30% FM modulation frequency : 400Hz Frequency displacement : 22.5kHz

Frequency Range

AM 531kHz~1710kHz : US,UN model

FM 87.5MHz~108MHz

Standard measurement positions of volume and switch

Power : Standby (Light STANDBY Indicator) Sub woofer VOL. : Minimum Sound mode : OFF Main VOL. : 0 Minimum Traverse mecha set position : Disc 1 Mic MIX VOL : MAX (Only US,UN ver.) ECHO : OFF

Measurement conditions

Power supply voltage AC110/127/230-240V(50/60Hz): US,UN model

Measurement output terminal : Speaker out : TP101(Mesuring for TUNER/DECK/CD) : Dummy load 6ohm

Precautions for measurement

1. Apply 30pF and 33kohm to the IF sweeper output side and 0.082 F and 100kohm in series to the 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 MPX 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.

7. In the case of BTL connection amplifier, 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 OTL system.

1-29

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Arrangement of adjusting positions

Cassette mechanism section (Mechanism A section)

Head azimuth

adjusting screw

(Forward side)

Playback

head

Head azimuth

adjusting screw

(Reverse side)

Cassette mechanism section (Back side)

Head azimuth

adjusting screw

(Forward side)

Playback, recording and eraser

heads or playback head

Head azimuth

adjusting screw

(Reverse side)

Cassette Mechanism Unit Section

Tape speed ADJ

Bias ADJ L

Bias ADJ R

1-30

Tape recorder section

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Items Measurement

Confirmation of head angle

Confirmation of tape speed

conditions

Test tape :VT7036L Measurement output terminal :Speaker terminal Speaker R (Load resistor:6 ) :Headphone terminal

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

1.Playback the test tape VT703L.

2.With the playback mechanism or 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 a turn.

3.In either case,this adjustment should be performed in both the forward and reverse directions with the head azimuth screw.

<Constant speed> Adjust VR301 so that the frequency counter reading becomes 3,000Hz 60Hz when playing back the test tape VT712(3kHz)with the playback mechanism or playback and recording mechanism after ending forward winding of the tape.

Reference values for confirmation items

Items Measurement

Double tape speed

conditions

Test tape :VT712(3kHz) Measurement output terminal :Speaker terminal Speaker R (Load resistance:6 ) measurement output terminal :Headphone terminal

After setting to the double speed motor, confirm that the frequency counter reading becomes 4,800+400/-300Hz when the test tape VT712 (3kHz) has been play back with the playback mechanism.

Measurement method

Standard

values

Maximum output

Tape speed of decks (A and B) :3,000Hz 60Hz

Standard

values

4,800+400/

-300Hz

Adjusting positions

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

VR301

Adjusting positions

Playback mechanism side

Difference between the forward and reverse speed. P.mecha and R/P mecha speed

Wow & flutter

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

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

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

60Hz or less

with in

0.25% JIS(WTD)

Both the playback and recording & playback mechanism

1-31

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Electrical performance

Items Measurement

Adjustment of recording bias current (Reference value)

conditions *Mode : Forward or reverse mode *Recording mode *Test tape : AC-225 Measurement output terminal :Both recording and headphone terminals

1.With the recording and playback mechanism, load the test tapes(AC-225 to TYP ),and set the mechanism to the recording and pausing conditions 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 VR101 for LcH and VR201 for RcH so that the recording bias current values become 4.0 A (TYP ).

Measurement method

Standard

values AC-225 :4.20 A

Adjusting

positions

LcH :VR101 RcH :VR201

Adjustment of recording and playback frequency characteristics

Reference frequency :1kHz and 10kHz (REF:-20dB) Test tape :TYP AC-225 Measurement input terminal :OSC IN

1.With the recording and playback mechanism,load the test tape(AC-225 to TYP ),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 test tape.

3.While recording and playing back the test tape in TYP ,adjust VR101 for LcH and VR201 for RcH so that the output deviation between 1kHz and 10kHz becomes -1dB 2dB.

Reference values for electrical function confirmation items

Items Measurement

Recording bias frequency

conditions

*Recording and playback side forward or reverse *Test tape :TYP AC-225 *Measurement terminal BIAS TP on P.C.board

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-225 to TYP ),and set the mechanism to the recording and pausing conditions in advance.

3.Confirm that the BIAS TP frequency on the P.C.board is 100kHz 6kHz.

Measurement method

Output deviation between 1kHz and 10kH :-1dB 2dB

Standard

values 100kHz +9kHz

-7kHz

LcH :VR101 RcH :VR201

Adjusting

positions

Eraser current (Reference value)

1-32

*Recording and playback side forward or reverse *Recording mode *Test tape :AC-225 Measurement terminal Both of the eraser head

1.With the recording and playback mechanism, load the test tapes(AC-225 to TYP ),and set the mechanism to the recording and pausing condition in advance.

2.After setting to the recording conditions,connect 1M in series to the eraser head on the recording and playback mechanism side,and measure the eraser current from both of the eraser terminal.

TYP :75mA

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Flow of functional operation until TOC read

Power ON

Play Key

Slider turns REST SW ON.

Automatic tuning of TE offset

Confirm that the voltage at the pin5 of CN801 is "H"\"L"\"H".

Check Point

Tracking error waveform at TOC reading

Approx.3sec

Tracking servo off states

Automatic measurement of TE amplitude and automatic tuning of TE balance

VREF

pin 25 of IC601(TE)

Approx

1.8V

Disc states to rotate

Tracking servo on states

Disc to be braked to stop

TOC reading finishes

500mv/div 2ms/div

Fig.1

Laser ON

Detection of disc

Automatic tuning of Focus offset

Automatic measurement of Focus S-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 pin40 of IC651 is + 5V?

Confirm that the Focus error S-cuve signal at the pin28 of IC651 is approx.2Vp-p

Confirm that the signal from pin24 IC651 is 0V as a accelerated pulse during approx.400ms.

Confirm the waveform of the Tracking error signal. at the pin 25 of IC601 (R604) (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

1-33

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Maintenance of laser pickup

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

(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 : ampli tude of eye pattern) will below.

Is the level of

RFOUT under

1.25V 0.22Vp-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.

(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.

1-34

Description of major ICs

AN7345K (IC302) : PB/REC amp.

1. Block diagram

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

2. Pin Function

Symbol

No.

1

R1

2

R2

L1

L2

NF1

24

1

R1

I/O

I

Playback amplifier input

I

23

2

R2

22

3

NF2

AMP

Pre

OUT1

4

OUT2

Function

EQ1

2021

EQ

CTRL

5

EQ2

CTL1

Pre

Source

CTRL

6

CTL2

RIN1

RNF1

1819

17

78

RIN2

RNF2

Pin No.

13

14

9

Symbol

EQ

CTL

ALC

10 11

LC

LPF GND

I/O

I

VCC

RF

141516

13

REPPLE

REJ

12

Repple filter

ROUT1

ALC AMP

ROUT2

Vcc Power supply

RF

Function

3

NF2

4

OUT2 Playback amplifier output

EQ2 I

5

CTL2 I Pre Amplifier input swithing time

6

RIN2 I

7

RNF2 I Recording amplifier negative feedback

8

ROUT2

9

LC I

10

11

LPF

GND I

12

I

Playback amplifier negative feedback

O

Equlaizer

constant

Recording amplifier input

Recording amplifier output

O

ALC low cut

I ALC low pass filter

EQCTL EQ control

15

16

ROUT1

17

RNF1 Recording amplifier negative feedback

RIN1

18

CTL1

19

20

EQ1 Equlayzer

21

OUT1

NF1

22

L2 I

23

24

L1

I

O

Recording amplifier output

I

I Recording amplifier input

Pre amplifier input swithing control

I

Playback amplifier output

O

Playback amplifier negative feedback

I

Playback amplifier input

I

1-35

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

MN101C35DEA (IC810) : System controller

Pin function (1/2)

Pin No.

1 2 3 4 5 6 7 8

9,10

11

12,13

14 15

16~19

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 49 50

Symbol

KCMND

M STAT

KCLK

DATA OU T

DATAIN

CK

BEAT

VDD

OSC2,1

VSS

XI,XO

MMOD

VREF-

KEY1~4 SLCKEY1 SLCKEY2 SLCKEY3

SPI

VREF+

MRDY

RESET

P OPEN

P CLOSE

VOLLED

MSI ECHO2 ECHO1

REMIN PHOTOA PHOTOB

INH

RDSCLK

PRT

EXTCE

BASSVOL+/-

RDS-DATA

SPIA SPIB

VOL+/-

MPX FVOLDA VOLCLK

BASSLED

I/O

O

O O

I/O

O

O O O

Function

SVC3 Serial data output I I

I

-

I I I I I I I I I I

I

-

I I I I I I

I I

-

I I

SVC3 status input input

SVC3 Serial clock input

SLC/TUNER data output

TUNER data input

SLC/TUNER clock

Beat cut signal output of TUNER

Power supply +5V

Oscillation terminal (8MHz)

Connect to GND

Sub clock (32.768kHz)

Connect to GND

Key matrix input 1~4

Tape B playback/recording detect switch

Tape B playback detect switch

Tape A playback detect switch

SPI IN

AD port voltage reference

VC3 Ready

Reset signal input

Rolling panel open detection signal input

Rolling panel close detection signal input

LED Control signal output (VOL)

MS detector signal input

Echo ON/OFF(Not used)

Remote control signal input

Tape A mechanism running detection signal input

Tape B mechanism running detection signal input

Inhibit signal input

Clock signal input from IC3 (B/E/EN model)

Protector input

EXT IC Chip enable

Bass volume rotary encoder input(+/-)

RDS data input from IC3(B/E/EN model)

SPI Control A

SPI Control B

Volume rotary encoder input (+/-)

Stereo detect

Front volume data output

Clock signal output to IC436 LED Control signal output (BASS)

1-36

Pin function (2/2)

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Pin No.

51~63 64~87

88 89 90 91 92 93 94 95 96 97 98 99

100

Symbol

G13~G1

P1~P24

SLCCE

AUX LED

DOORCL

DOOR OPEN

CDLED

TAPE LED

TU LED SMUTE

BTU+ POUT TUCE

VC3RESET

VPP

I/O

O O O O O O O O O O O O O O

-

Function

FL grid control signal output FL segment control signal output SLC Chip enable signal output to IC303,IC304 LED Control signal output (AUX) Rolling panel motor control signal output Rolling panel motor control signal output LED Control signal output (CD) LED Control signal output (TAPE) LED Control signal output (TUNER) System mute control signal output Tuner supply control Power ON/OFF TUNER Chip enable signal output VC3 reset output Power supply

BU4094BCF (IC303) : Serial to parallel port extension

1.Pin layout

STROBE

DATA

CLOCK

Q1 Q2 Q3 Q4

Vss

1 2 3 4 5 6 7 8

16

Vdd

15

OUTPUT ENABLE

14

Q5

13

Q6

12

Q7

11

Q8

10

Q's

9

Qs

2.Block diagram

DATA

CLOCK

STROBE

OUTPUT

ENABLE

2

3

1

15

Q1

PARALLEL OUTPUT

8-STAGE

SHIFT REGISTER

8-BIT

LATHES

3-STATE

OUTPUTS

Q8

10

9

Q's

Qs

SERIAL OUTPUT

1-37

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

AN22000A-W (IC601) : Digital servo head amp.

1.Block diagram

A + C

-

+

B + D

-

+

F

-

+

CBDO

BDO

SUBT

COFTR

CAGC

RFN

4 5 6 7 8 11 12 13 14

RFOUT

RF_EQ

A

32

C

31

B

30

D

29

E

27

AMP

RFIN

NRFDET

GCA

ARF

AGC BDO OFTR

BCA

OFTR

3TENV

-

+

-

+

9

10

15

22

23

21

20

CEA

3TOUT

NRFDET

FEN

FEOUT

TEN

TEOUT

E

-

+

2. Pin function

Pin No.

Function

1

APC amp. input terminal

2

APC amp. output terminal

3

Power terminal

4

Inversion input terminal for RF addition amplifier

5

RF add amp. output terminal

6

AGC input terminal

7

Capacity connecting terminal for AGC loop filer

8

AGC output terminal

9

Capacity connecting terminal for HPF amplifier

10

3TENV output terminal

VREF

TEBPF

F

28

17

+

-

Pin No.

GCAAMP

GCTL

Function

11

For envelope detection at the dark side of RF

12

BDO output terminal

13

For envelope detection at the blight side of RF

14

OFTR output terminal

15

NRFDET output terminal

16

Ground

17

VRER output terminal

18

VDET output terminal

19

VDET input terminal

20

TE amp. output terminal

21

TE amp. reverse input terminal

BCA

TBAL

VDET

-

+

FBAL

Pin No.

22 23 24 25 26 27 28 29 30 31 32

19

VDET

18

2

LD

PD

1

316252624

VCCGND

Function FE amp. reverse input terminal FE amp. output terminal GCTL & APC terminal FBAL control terminal TBALcontrlo terminal Tracking signal input terminal 1 Tracking signal input terminal 2 Focus signal input terminal 4 Focus signal input terminal 2 Focus signal input terminal 3 Focus signal input terminal 1

1-38

BA3837 (IC466) : Mic mixer

1.Block diagram

C

16

15

B

A

14

ROUT

13

LP

12

LP

11

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

LP

10

RIN

9

1

VCC

2.Pin function

Pin No.

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

LOGIC

+

-

2

MIC

Symbol

VCC

MIC IN

LOUT

FK TK

LIN

BIAS

GND

RIN LPF1 LPF2 LPF3

ROUT CONTA CONTB

CONTC

-

+

3

LOUT

+

-

SW2 SW1

4

FK

I/O

Power supply

Microphone mixing input

I

O

O O O O

Channel L output Non connect

Non connect

Channel L input

I

Signal bias

I

Connect to GND

Channel R input

I

Connects to LPF time constant element Connects to LPF time constant element LPF outpout Channel R output Mode select input A

I

Mode select input B

I

Mode select input C

I

TK

-

+

-

R

L-R

L+R

-

+

L

+

-

5

6

LIN

7

BIAS

8

GND

Description

BA15218 (IC481, IC501, IC502, IC526, IC571) : Op. amp.

EE

1OUT1

2-IN1

1

3+IN1

+

4

-

2

+

8

7

6

5V

V

CC

OUT2

-IN2

+IN2

1-39

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

BU9253AS (IC902) : LPF & Echo mix.

1.Pin layout & block diagram

1

GND

ECHO VR

BIAS

DAINT IN

2

3

4

5

OSC

COUNTER

18

17

16

15

14

CR

MUTE

VCC

ADINT IN

DAINT OUT

DALPF IN

DALPF OUT

MIX OUT

2.Pin function

Pin No. Symbol

1 2

ECHO VR 3 4 5 6 7 8 9

DAINT IN

DAINT OUT

DALPF IN

DALPF OUT

MIX OUT 10 11 12 13 14

ADLPF IN

ADLPF OUT

ADINT OUT

ADINT IN 15 16 17 18

6

7

- +

8

9

GND

BIAS

MIX IN

VCC NC2

MUTE

CR

D/A

MIX

SRAM

I/O

I

-

I

O

I O O

I

I O O

I

-

I

-

A/D

13

ADINT OUT

12

ADLPF OUT

- + 11

ADLPF IN

10

MIX IN

Descriptions

Connect GND Echo level control Non connect Analog part DC bias DA side integrator input DA side integrator output DA side LPF input DAside LPF output Mix AMP output for original tone& echo tone Mix AMP input pin for original tone AD side LPF input AD side LPF output AD side integrator output AD side integrator input Power supply Non connect Mute control signal input CR pin for oscillator

1-40

LA1838 (IC1) : FM AM IF amp. & detector, FM MPX decoder

1. Block Diagram

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

30

ALC

BUFF

FM S-METER

FM IF

1

2. Pin Function

Symbol

No.

FM IN

1

AM MIX

2

3

FM IF

AM IF

4

GND

5

6

TUNED

STEREO

7

8

VCC

9

FM DET

10

AM SD

FM VSM

11

AM VSM

12

13

MUTE

14

FM/AM

MONO/ST O

15

29

28

REG

AM

MIX

OSC

SD COMP

S-CLRVE

PM DET

2

I/O

I

This is an input terminal of FM IF

AM

AM/FM IF-BUFF

3

27

FM

RF.AMP

AM IF

4

26

AGC

AM S-METER

Function

DET

GND

5

signal.

This is an out put terminal for AM

O

mixer.

I

Bypass of FM IF

Input of AM IF Signal.

I

This is the device ground terminal.

When the set is tuning, this terminal

O

becomes "L".

O

Stereo indicator output. Stereo "L", Mono: "H"

III

This is the power supply terminal.

I

FM detect transformer.

I

This is a terminal of AM ceramic filter.

O

Adjust FM SD sensitivity.

O

Adjust AM SD sensitivity.

I/O

When the signal of IF REQ of IC121( LC72131) appear, the signal of FM/AM IF output. //Muting control input.

Change over the FM/AM input.

I

"H" :FM, "L" : AM

Stereo : "H", Mono: "L"

25

TUNING DRIVE

6

24

STEREO DRIVE

7

22

23

P-DET

VCC

89

Symbol

No.

16

L OUT

17

R OUT

18

19

20

21

22

23

24

25

26

27

28

29

30

L IN

R IN

RO

LO

IF IN

FM OUT

AM DET

AM AGC

AFC

AM RF

REG

AM OSC

OSC BUFFER

21

DECODER ANIT-BIRDIE

VCO 384KHz

10

20

STEREO 5N SW

FF 38k

11

I/O

O

Left channel signal output.

O

Right channel signal output.

Input terminal of the left channel post

I

18

19

MUTE

FF

/

19k

2

12 13

FF 19k

/

LS

Function

17 16

PILOT DET

14

AMP.

Input terminal of the right channel

I

post AMP.

Mpx Right channel signal output.

O

Mpx Left channel signal output.

I

Mpx input terminal

FM detection output.

O

AM detection output.

O

This is an AGC voltage input terminal

I

for AM

I

This is an output terminal of voltage for FM-AFC.

AM RF signal input.

I

Register value between pin 26 and pin28

O

desides the frequency width of the input signal.

I

This is a terminal of AM Local oscillation circuit.

AM Local oscillation Signal output.

O

15

1-41

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

LA6541-X (IC801) : Servo driver

1. Pin Layout & block diagram

Vcc Vref Vin4 Vg4 Vo8 Vo7

24 23

11k ohm

22

21

20

19

Vcc

Gnd

Vo6 Vo5 Vg3 Vin3 Cd Res

18

17 16

- +

Level shift

11k ohm

1

2

3456

Vcc Mute Vin1 Vg1 Vo1 Vo2 Vo3 Vo4 Vg2 Vin2 Reg

B T L driver

Gnd

B T L driver

7 8 9101112

Level shift

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

11k ohm

14

13

RESET

Regulator

11k ohm

out

Reg In

1-42

LC72136N (IC2) : PLL frequency synthesizer

1. Pin layout

FM/AM

CLOCK

FM/ST/VCO

AM/FM

2. Block diagram

XT

CE

DI

DO

SDIN

1 2 3 4 5 6 7 8 9 10 11

22 21 20 19 18 17 16 15 14 13 12

XT GND LPFOUT LPFIN PD VCC FMIN AMIN

IFCONT IFIN

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

1

22

16

15

3

4

5

6

17

21

3. Pin function

Symbol

No.

1

2

3

4

5

6

7

8

9

10

11

XT

FM/AM

CE

DI

CLOCK

DO

FM/ST/VCO

AM/FM

LW

MW

SDIN

Reference

Driver

Swallow Counter

1/2

C

2

B

I/F

Powe r

on

Reset

Function

I/O

X'tal oscillator connect (75kHz)

I

LOW:FM mode

O

When data output/input for 4pin(input) and

I

Swallow Counter

1/16,1/17 4bit

12bit

Programmable

DriverS

Data Shift Register & Latch

7821113

6pin(output): H

Input for receive the serial data from

I

controller

Sync signal input use

I

Data output for Controller

O

Output port

"Low": MW mode

O

Open state after the power on reset

O

Input/output port

I/O

Input/output port

I/O

Data input/output

I/O

Phase

Detector

Charge Pump

Unlock

Detector

Universal

Counter

Symbol

No.

12

IFCONT

13

14

15

16

17

18

19

LPFOUT

20

21

22

IFIN

AMIN

FMIN

VCC

PD

LPFIN

GND

XT

18

19

20

12

I/O

Function IF counter signal input

I

IF signal output

O

Not use

-

AM Local OSC signal output

I

FM Local OSC signal input

I

Power suplly(VDD=4.5-5.5V)

When power ON:Reset circuit move

PLL charge pump output(H: Local OSC

O

frequency Height than Reference frequency.

L: Low Agreement: Height impedance)

Input for active lowpassfilter of PLL

I

Output for active lowpassfilter of PLL

O

Connected to GND

X'tal oscillator(75KHz)

I

1-43

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

STK402-050[MX-GT98/95V], STK402-030[MX-GT88/85V, MX-G78/75V] (IC601) : Power amp.

1.Pin layout

115

2.Block diagram

4

R1

TR7

TR9

8

R13

TR4

R6

C1

1

TR1

2

TR3

R2

TR2

R3

R4

D1

SUB

R5

13

TR5

TR6

TR8

R7

1256710

TR10

11

R8

TR12

TR13

R9

TR11

R10

C2

R11

R12

TR14 TR15

TR16

R14

9

14

15

1-44

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

STK412-010[MX-GT98V/GT95V], STK412-000[MX-GT88V/GT85V], STK412-090[MX-G78V/G75V] (IC701) : Power amp.

2

7

SUB

5

4

1

3

6

1813 17

R41

TR41

Comparator

TR11

TR12

D12

R13

D42

R16

D43

D41

C12

R11

C11

TR18

TR13

TR14

R14

D51

R15

D53

R16

TR17

D52

Comparator

R31

TR32

R12

TR15

R17

D6

R3

TR1 TR2

TR6

R19

TR9

C2

C1

R1

14

TR8

TR20

TR10

R4

TR4

TR3

15

R5

16

TR7

R6

TR5

12 9 8 11 10

R7

D1

R2

1-45

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

TDA7439 (IC436) : Control volume

1.Pin layout

1

SDA

2

CRE

3

Vs

4

AGND

5

ROUT

6

LOUT

7

R-IN4

8

R-IN3

9

R-IN2

10

R-IN1

11

L-IN1

12

L-IN2

13

L-IN3

14

L-IN4

MUXOUTL

15

2.Block diagram

TDA7439

30 29 28 27 26 25 24 23 22 21 20 19 18 17 16

CSL DIG GND TREBLE(R) TREBLE(L) MIN(L) MOUT(L) BOUT(L) BIN(L) BOUT(R) BIN(R) MOUT(R) MIN(R) INR MUXOUTR INL

L-IN1

L-IN2

L-IN3

L-IN4

R-IN1

R-IN2

R-IN3

R-IN4

11

12

13

14

10

MIN(L)

26

MIDLE

25

MOT(L)

23

G

0/30dB 2dB STEP

INL

MUXOUT

15 16 27

VOLUME

2

I C BUS DECODER LATCHES

TREBLE

TREBLE(L)

9

G

VOLUME

TREBLE

MIDLE

8

7

INPUT MULTIPLEXER GAIN

17

18

201928

BIN(L)

24

BASS

2221

BOUT(L)

SPEAKER AT T LEFT

SPEAKER AT T RIGHT

SUPPLY

2

6

30

SCL

1

SDA

29

DIG-GND

5

ROUT

3

Vs

4

AGND

LOUT

INR

CREF

MUXOUT

MIN(R)

TREBLE(R)

BIN(R)

MOUT(R)

BOUT(R)

1-46

BA3835S[MX-GT98/95V] (IC812) : SPI B.P.F.

1.Block Diagrams

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

BIASC

VREFC

RREF

DIFOUT

N.C.

CIN

AIN

VCC

1

2

3

4

5

6

7

8

9

2.Pin Function

No. Symbol

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16 17 18

BIASC

VREFC

RPEF

NC NC

NC CIN AIN

VCC SPI-A SPI-B

SPI-C

SPICSB

NC NC

TEST

AOUT

GND

A-C

DIF

105Hz BPF

340Hz BPF

1kHz BPF

3.4kHz BPF

10.5kHz BPF

REFERENCE CURRENT

PEAK HOLD

I/O

-

I

-

O O O O

-

O

-

BIAS

VREF

RES

MPX

RES

DEC

18

17

16

15

14

13

12

11

10

GND

AOUT

TEST

N.C.

SEL

C

B

A

Function Decoupling condenser connection terminal. Decoupling condenser connection terminal. Reference resistance connection terminal. Non connect. Non connect. Non connect. Connected to GND of audio system through a condenser. Inputs the audio signal through a condenser. Power supply terminal. Output selection control terminal. Output selection control terminal. Output selection control terminal. Output selection control terminal. Non connect. Non connect. Connected to GND upon normal use. Multi-plexor output terminal. Connect to GND.

1-47

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

BU2092/F (IC811) : Port expander

1.Terminal Layout

1

Vss

DATA

CLOCK

LCK

Q0

Q1

Q2

Q3

Q4

2

3

4

5

6

7

8

9

2.Pin Function

CONTROL

CIRCUIT

12BIT SHIFT RESISTER

12BIT STRAGE RESISTER

OUTPUT BUFFER(OPEN DRAIN)

13

10

18

17

16

15

14

12

11

V

DD

OE

Q11

Q10

Q9

Q8

Q7

Q6

Q5

Pin No.

1

2

3

4

5~16

17

18

Symbol

Vss

DATA

CLOCK

LCK

Q0~Q11

OE

V

DD

I/O

-

I

O

I

-

BA3126N (IC301) : R/P switch

Function

GND

Serial Data input

Shift Clock of Data (Rise Edge Trigger)

Latch Clock of Data (Rise Edge Trigger)

Parallel Data Output (Nch Open Drain FET)

Latch Data L H OUTPUT ON OFF

Output Enable (Output FET "H" Level is OFF)

Power Supply

1-48

S W

R E C

G

123456789

S W

P / B

C O N T .

G N D

V c c

P / B

G

R E C

S W

LB1641 (IC851, IC852) : DC motor driver

1. Pin layout

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

1 2 3 4 5 6 7 8 9

GND OUT1 P1

VZ IN1 IN2

VCC1

VCC2 P2

10

OUT2

2. Pin function

Input Output

IN1 IN2 OUT1 OUT2

0 0 0 0 1 0 1 0 0 1 0 1 1 1 0 0

COUNTER-CLOCKWISE

Mode

Brake

CLOCKWISE

Brake

NJM4580L[US ver. only] (IC901) : Mic amp.

1. A OUTPUT

2. A-INPUT

3. A+INPUT

-

4. V

5. B+INPUT

6. B-INPUT

1

2

34

5

6

7

8

7. B OUTPUT

8. V+

1-49

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

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.21026)

200109(V)

Block diagram

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

FMA-006

5

FM

AM

FM FRONTEND TU1

MW RF/OSC COIL

4

M

L CAM

R CAM

CN805

3

FOCUS

M

CN804

P001

P011

SW1 6

PICKUP

TRACKING

FEED

2

SPINDLE

CAM0 3

CAM4 7

CN855

1SSW 3SSW 1MSW 3MSW

CN854

A+C B+D E F

CN601

F T

FM SM

CN801

FM/DET

IF

AM/DET IC 1

PLL Synthesizer IC2

L MOTOR DRIVER

IC 851

R MOTOR DRIVER

IC 852

RF & SERVO AMP

IC601

FOCUS/SPINDLE/ FEED/TRACKING BTL DRIVER IC801

FMN-011A

UNIT MICOM CD CHANGER CONTROL IC 251

CN1

VIDEO

DIGITAL OUT

ARF

FMC-027-1

TUNER

CN11

OUT

AUX

IN

TX

CN661 CN504

TX

CD

CN651 CN151

DIGITAL SERVO

&

PROCESSOR

IC 651

SOURCE SELECTOR

CD

MPX

& E.VOL IC436

AUX

CN102

FMV-010AM

VCD CONPANION CHIP

VCD PROCESSOR

IC104

IC101

CN101

IC102

EPROM

IC103

DRAM

TAPE

CN315

MAIN

MIC

KCMND MSTAT KCLK MRDY

SLCKEY 1~2

MAIN HPF MUTE SYSTEM IC481

INPUT AMP IC 501

VOLDA,VOLCK

CN870/CN871

CN860/CN861

MPX

HARMONICS GENERATOR IC 502

KARAOKE

IC446

MICOM

IC 810

FL DISPLAY

FL 801

FMB-028-1

LPF

IC 526

KEY1,11 CD1LED

MIC

CN706

FW714

CD2LED CD3LED

SEARCH R,F KEY21,22

LPF& ECHO MIX

IC902

FMH-031-2

MAIN

POWER AMP IC602

SUB WOOFER

POWER AMP IC 701

FW915

CN911

FW901

VOL KEY2,3,21,32,41,42

CN215

FMB-028-3

KEY

LED

FMH-031-3

SEARCH KNOB

LED

FMH031-1

CN205

CN880

CN207

CN870

FMB-028-4

RELAY RY2

CN217

RELAY RY1

FMB-028-2

MAIN VOL WOOFER VOL SOUND MODE

KEY

LED

MIC JACK 1,2 (Only US)

J81

SPEAKER TERMINAL

CN316

CN305

PB MECHA HEAD

R

L

RP MECHA HEAD

R

CN301CN302

FMP-007-1

PB/REC AMP

IC302

SERIAL TO P ARALLEL

PORT EXTENSION

IC303

1

L

HEAD SW

IC301

ABCD E F G

CN306

SOLENOID DRIVE FOR RP MECHA

Q3314 Q3315

SOLENOID DRIVE FOR PB MECHA

Q3312 Q3313

SLCKEY1 2PHOTO A,B

DRIVER

FW301CN303

M

FMP-007-2

SLCKEY2 PHB

SLCK

CN333

PHA

PB MECHA

PP MECHA

IC332

SW302 SW306

IC331

SOLENOID SW303

SW304 SW305 SW316

SOLENOID

2-1

Standard schematic diagrams

Power supply section

5

0.33( 1/2W) R1002

SHEET 1/9

4

SHEET 2/9

CN220 QGD2504C1-03Z

CN214

QJK015-071214

F102

T4AL

F101

T4AL

T001

CN218

QGA3901C1-03

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

CN219

CN209

QGA7901C1-04

WJK0070-002A

CN208

WJK0114-001A

F001

T4AL

F003

T2AL

CN250

QGA7901C1-02

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

3

2

Parts are safety assurance parts.

1

When replacing those parts make sure to use the specified.

2-2

SHEET 1/9

HABC DEFG

DC regulation & Audio output section

QGA2501C1-02

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

CN705

IC701

2SA965/OY/-T

C706

5

Q737

KRA111M-T

R736

4.7K

R734

4.7K

R733

10/25

C726

4.7K

R735

4.7K

R730

10K

R727

100K

Q727

KTA1268/GL/-T

QGD2504C1-03Z

CN703

SHEET 5/9

4

CN704

QGD2504C1-03Z

MAINL

SHEET 3/9

MAINR

CN706

QGD2504C1-03Z

CN201

QGB2510J1-11

82K

R725

2SC2389S/SE/-T

Q726

R728 10K

R729

100K

R639 820

R640

820

R740

Q736

2SC3576-JVC-T

Q734

2SC3576-JVC-T

Q733

2SC3576-JVC-T

Q735 2SC3576-JVC-T

R726

KTC3199/GL/-T Q728

C729

47/16

820

R739

820

100K

D703 D704

MTZJ15C-T2

10

R774

0.22

R753

D723

R723

R742

R724

R741

6.8k

MTZJ36A-T2

C707

47/63

820

R705

D728

1SS133

D724

C709

4.7p

R707

56K

MTZJ36A-T2

R715

C713

0.047

C715

0.047

R754

10

R713

10

C705

220P

0.22

C731

R717

0.022

R761

1K

L701

0.45

Q701

D719

10K

R721

KTA1268/GL/-T

R719

5.6K

R766

1K

R718

KTA1268/GL/-T

D720

1SS133

R720

QGB2510K2-14

QGB2510J1-14

33k

1K

0.022

Q702

2SC2235/OY/-T

C730

R762 1K

1SS133

5.6K

CN215

CN205

Q713

R704

R703

0.45

L702

R714

10K

R722

R778 10K

10K

R777

C722

56k

C703 C704

C721

C710

4.7p R708

56K

10

C708

R716

10

C714

0.0470.047

R706

C716

PRT

3

SHEET 3/9

PRT SWFB

SURR.CTRL

C281

R281

47/63

L201

QQR0779-001Z

R786

Q710

10K

R787

R776

C711

C712

0.1

1k

470p

R775

1k

47/63

C739

820

1/50

KTC3200/GL/-T Q711

D726

1SS133

100K

R768

R769

Q712

KTA1268/GL/-T

0.1

47

R701

R702

2.2K

C723

100/10

Q790

KTC3199/GL/-T

R792

1K

10k

R790

1SS133

47/25

C790

CN207

QGB2510J1-10

100K

R793

MAINL

SWL

D790

R220

47

R798

10

10k

R796

6.8K

R795

R797 20K

Q792

Q791

KTC3199/GL/-T

10k

R794

0.1

C639

CN217 QGB2510K2-10

KTC3203/OY/-T

R675

1k

R676

1k

47/63

C607

R605

1.2K

RY1

QSK0109-001

C609

10P

R607

56K

C613C615

RY2

IC602

C621

10/35V

C603

220p

C604

220p

10/35V

R615

10

0.047

D725 1SS133

D650

1SS133

C605 220P

56k

R603R604

56k

C622

C612

220

R617

C601 C602

10

R613

0.022

L601

0.45 Q601

KTA1268/GL/-T

D619

1SS133

10K

2.2K

R621

R619

C683

0.082

R682

4.7M

R681

R680

1M

Q680

3.9K

2SK301/PQ/-T

0.22

R653

D622

MTZJ9.1B

R602

100

47/50

R666

33k

C623

C608

R606

0.22

C606 220P

R655

R674

0.45

KTA1268/GL/-T

R623

Q612

KTA1267/YG/-T

R668

10k

10

0.022

R667

220

R618

Q602

D620

1SS133

10K

2.2K

R620

KRC102M-T

Q613

C624

10/50

C611

100

47/50

0.047

R616

10

J81

QNB0107-001

R601

10

R614

L602

10/50

C610

10P R608 56K

47/63

C614C616

1.2K

SHEET 3/9

CN202

QGB2510J1-10

DZ2.4BSB-T2

D280

R284 47K

15K

R283

C280

0.22/50

R242

10K

Q240

KTC3199/GL/-T

2

1N4003S-T5

D227

R202

C221

D220

47/50

DZ9.1BSB-T2

100K

R205

C222

CN204

QGA3901C1-07

R248

1

D233

SHEET 1/9

1

Q373

KRA104M-T

Q374

R389

KRC104M-T

10K

R246

1

2A02M

R247

1

R249

1

C372

5.6K

R385

R384

2.7K

D370

22/50

D369

MTZ10JC

MTZJ11C

C373

0.01

Q372

KTA1023

47/50

C253

3300/25

D234

C374

22/50

2A02M

R217

C216

100/35

2.2

D217

27K

C214

C212

0.082

ABCD E F G

1N4003S-T5

D218

1N4003S-T5

C217

0.082

Q201

2SA934/QR/-T

STBY

KIA7808API

C307

IC303

C308

D313

10/50

D316

STBY

MTZJ8.2B

R360

2.2 R361

4.7

KTC3199/GL

R365

R366 200

200

D361

R203

7.5K

C219

C220

22K

R204

47/50

0.01

C218

D219

22/50

MTZJ33C

CN206

QNZ0136-001Z

5.6V

EP201

QGB2510J1-12

9V 8V

CN216

R218

27K

C211

0.082

C213

C204

47K

0.1

C202

R215

C215

C203

47K

R216

0.1

C205

0.1

C201

QGB2510K2-12

R306

0.33

R302

2.2

R364

MTZJ9.1B

IC305

KIA7809API

KTC3199/GL

C360

C312

Q360 2SD2395

Q362

47/16

D315

10/50

R362

R368

330

C361

0.01

C311

STBY

Q361

330

R363

1.2K R367

1.2K

D360

MTZJ5.1B

MTZJ9.1B

330

0.33( 1/2W)

D362

STBY

C309

R309

C362

MTZJ6.8C

IC304

KIA7812API

C301

22/50

IC301

KIA78R05PI

STBY

R311

10K

C310

D314

10/50

DZ13BSB-T2

MAIN signal

D308

C302

MTZJ5.6C-T2

10/50

Parts are safety assurance parts. When replacing those parts make sure to use the specified.

SHEET 2/9SHEET 2/9

2-3

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Main section

R572

R541

100

30k

C1228

47k

QGF1205C1-17

Q999

KRA102M-T

100/10

D434

DZ5.1BSB-T2

22k

SPISIG

CN871

R995

33K

R571

270

C534

47/16

CN870

R582

R523

8.2k

C514

100

Q571

2SC2785/FE/-T

R581

220k

0.027

B172

C578

C889

R470

5.6k

QGF1205C1-17

R580

1/50

IC502

BA15218

4.7/50

C466

0.068

10/25

C472

C469

R468

20k

D592

R473 15K

SPISIG

100p

R530

5.6k

22k

NC

RDSDA/KARAOKE

C532

47/16

C526

100/10

B242

RECL

IC526

R431

30k

RDS_CLK

BA15218

R526

B312

RECR

ECO

B313

R432

KCMND

MSTAT

TUCE

MCS

/CDMRST

C576

47/16

100k

C577

47/16

Q573

100/10

C527

R475

C476

200

BA3837

0.0068

CK

IC571

BA15218

R575

47k

C575

R532

R536

1.8K

R528

0.1

C530

22k

R529

C531

100

51K

R474

MPX

MSI2

1SS133-T2

D571

1SS133-T2

R576

D572

1SS133-T2

R579

100k

R577

2SC2785/FE/-T

C528

0.1

R534

R510

20k

R467

R469

5.6k

10/25

C471

0.27

C470

C535

100

R537

10/25

22/25

2.2/50 R466

C468

C467

C473

IC466

1k

10/25

R472

C475

C474

1/50

22k

R471

R996 10K

KARAOKE

J426

GP1FA550TZ

D426

C426

DZ5.1BSB-T2

C416

C1207

C419

0.0022

220P

C402

D411

D412

C415

D413

C501

4.7/50

B108

B151

R443 100k

R444

100k

C433

0.01

C886

0.022

C888

C403

0.01

2.7k

R407

R403

4.7k

R404

4.7k

C404

47/16

R411

10k

C411

220p

R412

220p

10k

C412

R415

2SC3576-JVC-T

200

C413

Q411

R416

C414

200 2SC3576-JVC-T

C1229

100/10

L566

3.3k

R502

R501

PBL

CDL

AUXL

10/16

10/25

10/35

2.2/50

C447

C439

C441

C443

B150

2.2/50

10/16

2.2/50

0.018

C449

C460

C450

C448

2.7k

B154

R438

C401 220P

5

R993

QRJ146J-4R7X

SHEET 7/9

CN315

QGF1205C1-10

1SS133-T2

D414

1SS133-T2

4

J411

QNN0420-001

CN661

QGF1016F3-19

C1201 220/10

C1202

R1208

R1205

R1206

R1209

0.082

1K 1k

1k

3

SHEET 6/9

2

C1205

C1206

1

C432

R401

R402

R413

R414

Q412

QQR0779-001Z

30k

R503

C502

TUL

TUR

10/25

C446

C445

0.022

0.1

C458

C454

5.6k

R439

68k

PBR

2.2/50

C444

0.1

C456

R426

56

C427

10/25

1K

Q401

2SC3576-JVC-T

R405

Q402

68k

2.2k

R417

10k

R419

R420

10k

R418

R519

100k

C510

R518

100k

4.7/50

C504

C509

0.0082

30k

R508

270k

R507

C1227

0.27

C505

4.7/50 C999

C998

CDR

AUXR

10/35

10/25

100/10

C437

C436

C442

C440

0.0056

0.1

0.0056

0.1

0.022

0.018

C457

C459

C453

C455

C461

C462

2.7k

5.6k

R440

R441

PBMUTE

AUXL

RECL

RECR

100/10

100P

10/25

R437

IC501

R442

RECL

RECR

AUXR

MSI

PBL

PBR

R406

2.2k

C507

BA15218

R1233

10k

R436

1k

10k

R511

100

VOLDA

C438

IC436

VOLCK

AUXMUTE

0.015

1SS133-T2

R505

100k

TDA7439

TX

R994

10K

C887

100

R583

Q572

2SC2785/FE/-T

Q413

KRA102M-T

R421

R410

22k

D502

1SS133-T2

R506

22K

C503

0.22

C508

56K

1.8K

R524

R517

D501

22K

R513

220k

R512

R504

220k

100k

0.01

SHEET 4/9SHEET 4/9

R998

10K

R997

D585

D587

R485

R585 47K

1SS133-T2

L568

L567

100K

R587

D431

C486

10/35

-30V

C588

22k

R563

DZ3.9BSB-T2

C485

10/35

10K

C586

0.0018

680P

R557

Q556

2SC3576-JVC-T

BASS1

IC481

R588

BA15218

12K

R495

C487

R586

2.2M C587

33P

Q586 KTC3199/GL/-T

22

R564

100

100/10

C589

Q557

22k

D432

BASS2

QRJ146J-4.7X

0.015

4.7K

R558

2SC3576-JVC-T

DZ3.9BSB-T2

R491

4.7k

R492

4.7k

1k

R496

SMUTE

QQR0779-001Z

1/50

C488

C994

470P

R886

33K

D593

SWFB

1SS133-T2

CK

MPX

TUL

TUR

CN11

QGF1205F1-09

CN504

QGF1016F3-15

R1203

1K

R1202

1K

QNN0017-002

C556

10/25

CN211

QGB2510K2-09/11

PRT

SWFB SURR.CTRL R992

POUT

-30V

RELAY

FW714

QUM156-18DGZ4

JA566

10K

CN212

QGB2510K2-10

SHEET 8/9

SHEET 9/9

SHEET 2/9

MAIN signal CD signal TAPE P.B. signal TUNER signal VIDEO signal

Parts are safety assurance parts. When replacing those parts make

R434

C995

100/10

C980

0.022

L571

C596

0.01

C981

2SC3576-JVC-T

30K

R560

C997

6.8K

R489

Q483

KRA102M-T

10P 10P

6.8K

C996

R490

L546

QQR0779-001Z

MSI

MSI2

1.5 C599

1000/6.3

Q562

R562

10k

R493

Q481

2SC3576-JVC-T

R494

10k

Q482

2SC3576-JVC-T

C993

sure to use the specified.

10k

R435

PBMUTE

BASS1

VOLCK

100/10

VOLDA

POUT

RELAY

BASS2

L572

QQR0779-001Z

D586

DZ6.8BSC-T2

C481

R487

R488

C585

C482

C594

470/10V

Q585

KTC3199/GL/-T

1/50

C593

47P

DZ6.8BSC-T2

R593 100K

QQR0779-001Z

R531

15k

100

R498

C484

R486

QQR0779-001Z

C483

PRT

2.2/50

C571

C489

SHEET 2/9

SHEET 3/9

2-4

HABC DEFG

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

FL & System control section

R993

1.2K S999

R997

FL801

GPIU271X

IC951

C836

5

100

SLA-362LT-T

R961

D962

R963

Q961

D964

1S133-T2

KRA102M-T

S963

R962

10K

R965

R921

10/25

G13

G14

G15

G16

G17

1000p

R964

C835

3.9K

5.6K

10K

L805

QQL29BJ-100Z

RA801

P1

QRB169J-104

P4

P5

P2

P3

P6

P78PP9

10P

P11

100K

R837

P16

P13

P15

G17

P12

P14

G11

G12

QQL231K-220Y

L802

100K

R836

R834

R835

P17

P19

P18

100K

R833

R831

R832

R874

R872

R891

R880

17G

P8

P10

P22

P21

16G

QLF0081-001

Q811

R869

100K

15G

P1P2P3P4P5P6P7P8P9

QQL29BJ-100Z

Q812

2SD1991A/RS/-T

R867

100K

14G

L806

2SD1991A/RS/-T

Q813

R865

100K

13G

Q858

2SD1991A/RS/-T

R858

100K

3G

Q816

2SD1991A/RS/-T

R856

2G

2SD1991A/RS/-T

100K

G2

Q817

R825

1G

2SD1991A/RS/-T

100K

G1

22/50

C817

C815

22/50

G1

RA802

QQR0779-001Z

L815

QRB169J-104

9G

4G

8G

G3

7G

5G

10G

12G

G13

6G

G2

G14

11G

G15

G16

G3

G4

G5

G1

G6G7G8G9G10

G2

Q890

100K

100K1K100K

100K

R868

R859

R870

R857

R866

R826

R890

13G

3G

15G

2G

1G

14G

P10

P22

2SD1991A/RS/-T

100K

Q879

R879

P19

P20CKP21

100K

P8

P18

2SD1991A/RS/-T

Q809

R873

17G

2SD1991A/RS/-T

100K

Q810

R871

16G

2SD1991A/RS/-T

100K

P10

P11

P12

P13

P14

P15

P16

P17

1.5K S996

R995

2.2K S995

R996

2.7K

S997

S998

R998 1K

C816

47/16

100

R970

QUM027-18Z4Z4

QGD2503F1-07

R897

18K

CD1LED CD2LED

CD3LED

R902

10K

FW915

SHEET 5/9

CN911

SHEET 5/9

4

SPI_A

POUT1

AUXLED SMLED CDLED BASSLED

TULED

ECHO1 ECHO2

RELAY BASS2

BASS1 PBMUTE SURROUND

POUT1

C889

4.7/50

SPI_B

SPIDTI

SPI_IN

VDD

C837

100/10

Q875

KRC102M-T

REMIN

QGF1205F1-17 CN860

MSI MPX INH SMUTE TUCE VC3RESET KCMND MSTAT KCLK DATA

CK

SPI-IN

MRDY

RDS-DATA/KARAUKE

SURROUND

CN861

QGF1205F1-17

QUM153-11DGZ4

FW230

RDS-CLK ECON

PRT

VOL-CK

VOL-DATA

RELAY

AUXMUTE

BASS2 BASS1

PBMUTE

C233

3

SHEET 3/9

2

SHEET 1/9

Q877 KRA102M-T

Q878

KRC102M-T

R234

0.1MY

R233

220

R889

220

R888 R887

220 220

R886

R885

220

1K

R911

10K

R912

RELAY

HP

KRA102M-T

R842

QQR0779-001Z

L812

Q843

10K

R844

1K

D812

1SS133-T2

10K

R876

R968

10K

RESET

INH

KIA7042AP-T

IC830

R884

68

R898

1K

R864

10K

BU2092/F

BA3835S

1SS133-T2

C862

22/50

IC811

C840

QGF1210G1-09

IC812

100/10

D860

L872

CN316

QQR0779-001Z

C857

C873

R878 C874 C875

EXTCE VOLCK

VOLDTA

VSS

C838

0.001

22/50

0.22/50

100K

0.1MY

R877 10K

C872

0.22/50

R861

R860

10K

680k

Q860 KTC3199/GL

22

R862

L801 QQL29BJ-100Z

C801

0.01MY

R151

220

KRC104M-T

Q905

R905

100K

PHOTOB

PHOTOA

SLCKEY2

SLCKEY1

DATA

SLCCE

TUCE SMUTE SEARCH-LED CD1LED

CD2LED CD3LED R_SEARCH

MSI MPX INH F_SEARCH VOLVOL+

SOUNDMODE-

10K

R828

1N4003S-T5

D807

KRC104M-T

Q906

R906 100K

R839

1K

MN101C35DEA

R854

1K

1SS133-T2

D805 R838

1K

R855

1K

R820 R819

1K

R851

1K

10K

R841

1K

C820

1.5MY

R845

R846

R847

KCLK

MSTAT

CK

KCMND

C821

10K

R817

KRA102M-T

D907

10K

R818

R801 330

Q908

1SS133-T2

Q907

C803 470/6.3

5.6K

R814

L803

QQL29BJ-100Z

D804 1SS133-T2

KRC102M-T

0.001

C804

C805

470/6.3

10K

R881

R882

R883

1N4003S-T5

1SS119-02-T2

D801

D803

R907 10k

DATA

0.1MY

C1034

C808

33P

L813 QQR0779-001Z

100/10

C1035

D1021

0.01

QAX0283-001Z

MTZ5.1B-T2

IC810

6G

5G

4G

3G

2G

1G

KEY3

KEY2

KEY1

X801

33P

C809

R1031

20K

C1036

100P

7G

KEY4

9G

8G

SLCKEY2

SLCKEY1

R1033

R1034

13G

12G

11G

10G

14G 15G 16G

17G

R843 R850

R895 R893

R824

MTZJ5.1B-T2

IC902

BU9253AS

R823

1K

INH

D831

C831

C832

0.01

R849

MRDY

SPIDTI

8.2K

C1038

4700P

10K

C1037

0.01

R1035

33K

R848

C1041

C1040

0.01

3300P

D832

DZ5.1BSB-T2

C1045

2.2/50

330

1K 1K

R1038

R1039

C1042

10K

R827

R840

220 1K

1K 1K

4.7K

10K

22/25

R1032

C823

0.01U

C1039

C1044

C1043

0.33MY

20K

R1037

0.47MY

0.01u

VC3RESET

SLLCE EXTCE VOLCK FVOLDA

ECON TAPELED PRT RDS_CLK SOUNMODE+ PHOTOB PHOTOA REMIN SPI_B SPI_A RDS_DATA

AUXMUTE BASSVOLBASSVOL+

RST

SLCKEY1

SLCKEY2

10K

R808

R807

R1036

0.0

15K

Q1021

KRA111M-T

20K

R1044

5.6K

R1040

R1041

2.7K

C1046

KRA111M-T

Q1023

1K

R1045

KEY2

KEY1

10K

R810

R811

1/50

R1043

10K

R829

KEY3

10K

R812

Q1022 KRA111M-T

20K

56K

R816

R815

R994

R894

10K

R822

R821

KEY4

10K

ECHO1

ECHO2

R813

220

R1042

2K

BASSLED CDLED

BASSVOL+ BASSVOLSMODESMODE+ TAPELED

VOL+ VOL-

R991

HP

TULED

SMLED AUXLED

QGF1210G1-24

CN880

2K

R992

SHEET 5/9

1

SHEET 7/9

Parts are safety assurance parts. When replacing those parts make sure to use the specified.

ABCD E F G

SHEET 4/9

2-5

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Front key section

IC901

FW915

5

SHEET 4/9

4

SHEET 4/9

QUM027-18Z4Z4

QUM027-13DGZ4

FW901

R918

S915

S916

S917

C901

0.01

QSW0911-001

D918

1K

R916

R917

1K

Q918

JS901

R904

D904

D905

C902

0.01

200

SLA-362LT-T

KRC102M-T

68

L-115XSRD-D-T

Q901

KRC102M-T2

R919

200

D919

Q919

KRC102M-T

S901

R908

5.6K

S902

SLA-362LT-T

200

R920

D920

SLA-362LT-T

Q920

KRC102M-T

VR901

QVQ0299-B54

C1068

0.22/50

C1066

R1069

1K

Q1061

2SD2144S/VW/-T

C1067

2.2/50 R1071

4.7K

560

R1070

NJM4580L

4.7/50

C1063

MTZJ2.4B-T2

R1065

1000p

C1021

D1062

TW800 QUB220-15DMHP

100

D1061

1SS133-T2

100/10

C1062

R1068

20K

150P

C1065

330P

4.7M

150P

56

R1067

C1064

R1066

R1021

4.7k

R1022

4.7k

1000p1000p

C1022

C1023

R1063

390

R1062

12K

10K

R1061

C1061

R1064

1.5k 220/10

J1021

QNS0184-001

J1022

QNS0184-001

68

JS956

QSW0912-001

JS960

D961D960 R960

QSW0911-001

R956

D957D956

JS962

QSW0862-001

3

SLA-362LT-T 68

Q960

0.01

CN870

R929

S952

R952

S943

2

SHEET 4/9

R930 10K

R955

S942

R931

S931

R932R933R935

S932

S933

S935

C956

2K

1.2K

1.5K

2.2K

2.7K3.9K5.6K

0.01

C957

2K

R951

S951

S936

S937

S938

S939

1.2K

R936

1.5K

R937

R938

2.2K

2.7K

R939

3.9K

R942

C1004

1000p

1

QUM153-33DGZ4

FW713

KTA1267/YG/-T

L1003

QQR0779-001Z

R940

D940

D945

KTA1267/YG/-T

C960

0.01

68

L-914SRD-T

Q940

C1005

1000p

R941

D941

D944

KTA1267/YG/-T

C1006

C961

0.01

R954

68

D954

D943

L-914SRD-T

Q941

KTA1267/YG/-T

L1001

1000p

C1001

68

L-914SRD-T

Q954

QQL231K-470Y

3900p

SLA-362LT-T

Q956

QNS0183-001

2200p

MTZJ2.4B-T2

S950

S949

S948

S947

S946

S945

S944

J1001

D1003

C962 C963

0.01 0.01

C1070

1k

R950

R949

1.2k

1.5k

R948

R947

2.2k

2.7K

R946

3.9k

R945

R944

5.6K

R943

10K

C935

0.01

TW801

QUB220-15DMHP

KTA1267/YG/-T

R953

68

D953

D942

L-914SRD-T

Q953

KTA1267/YG/-T

L1002

C1002

3900p

SHEET 2/9

2-6

SHEET 5/9

HABC DEFG

CD servo control section

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

CN805

5

SW1

SW2

SW3

SW4 SW5

SW6

CN804

CN855 QGB2012K2-10

MSN-5D257A

CN854 QGB2016K1-07

4

CN851 NI

C001

1

HDU-100

CN601 QGF1016F3-15

3

2KB

VR001

F+ T+ T-

HQMV7102-015

P001

F-

W601

2

1K

CAM0

R887

1K

CAM1

R886

1K

CAM2

R885

1K

CAM3

R884

1K

CAM4

R883

1K

CAM5

R882

1K

CAM6

R881

1K

CAM7

R880

L853

10

M851

M852

R861 R862 R863

R866 R865 R864

A+C

F

B+D

E

R636

10

C859

C860

1K

1SSW

1K

2SSW

1K

3SSW

1K

3MSW

1K

2MSW

1K

1MSW

F E B+D A+C

R618

15k

R634

LM-

1

LM+

L854

10

RM-

1

RM+

C602C601

R621

R620

R619

15k

C633

0.022

C632

1

R632

10

12

560K

120

R635

2SA1037AK/RS/-X

Q631

LA6541-X

0.0010.001

R624

IC601

AN22000A-W

100/6.3

C624

NI

R633

C623

R631

2.2

C631

10/16

C853

0.01

D851

DZ5.6BSB-T2

LMUP

LM+

Q842

NI

R842

4.7K

C604

0.022

C603

0.022

8.2k

0

R625

R623

R622

C612

1/50

1

C611

R611

R609

3.3k

0.027

C614

NI

0.1

C613

R610

NI

22K

T+

390P

C814

C610

R613

2.2K

C620

47p

C619

NI

R617

F+

F-

C802

C801

0.0068

390P

2.7K

R801

C811

LMDOWN

120k

NI

0.012

R855

NI

LM-

220K

R601

270K

R602

0

R607

C605

R603

150P

R614 22k

39p

C606

0.0047

0.01

NI

C615

R616

C616

C618 NI

0.027

Q632 NI

R812

1.5K

C815

2.2/50 R803

R804

R813 NI

C816 NI

R802

C642

390k

R604

C617

330P

2.2K 220K

3.9K

C821 C822 1 220/10

IC852IC851 LB1641LB1641

L851

0.01

C854

RMUP

RMDOWN

RM+

0

R608

150k R641

C641

0.022

2200p

R642

390k

1

C621

TP2

0.047

TP1

R615

NI

TRD

KICK

FOD

RM-

TBAL FBAL

LDON

FE

TE

C608

820p

VDET

/RFDET

C622

OFT

BDO

RFENV

ARF

WVEL

10

R856

0

C855

C852

0.1/25

10/16

1K 1K 1K 1K

62k

GCTRL

R606

C607

NI

TRV TVD

ECM ECS KICK TRD FOD

FBAL TBAL FE

R682

TE

1K

RFENV VDET

C676

OFT

0.1/25

/RFDET BDO

R661

LDON

39k

1M

R683

WVEL

470P C661

R667

4.7

0.1/25

100/6.3

C680

C679

22K

R871

22K

R872

22K

R873

22K

R876

22K

R875

22K

R874

22K

R811

R851 R852 R853 R854

STAT

/LSIRST

1K

R651

R652

C653

0.1/25

ARF

68K

R662

NI

R264

C663

C664

0.022

1MSW

X251 QAX0283-001Z

SUBQ

1K

R653

R685

120K

R663

0.022

1SSW

2SSW

3SSW

3MSW

2MSW

IC251

MN101C30AEE

22K

R888

22K

R889

22K

R890

22K

R891

22K

R892

22K

R893

22K

R894

22K

R895

P.ON

1K

R253

100

R254

100

R255

100

R256

1K

R257

1K

R252 SQCK SUBQ

/P.ON

100

R677

100

R679

100

R678

R261

100 100

R262

100

R263

SHEET 9/9

1K

R258

R259

MDATA

1K

R658

0.047

C668

1K

NI

33P

MCLK

1K

100

R654

R659

560k

2.7K

R672

C672

0.33U

0

R646

C252

CDBCK

CDLRCK

CDDATA

DABCK

DALRCK

DADAT

10K

R660

270

QAX0413-001Z

R665

NI

C671

C651 12P

R670

100

X651

C652

C656

C669

220/10

12P

C253

0.1/25

C655

0.1/25

NI

R687

R688

R686

C677

C673

0.1/25

220/10

0.1/25

C254 47/10

C657

220/10

XCLK

NI

R692

220

R666

/P.ON

R691

NI

C694

NI

P.ON

1K

R294

Q291

2SB1357/EF/-T

R292

10K

R291

1.2K

C659

1000P

CN151

QGF1016F3-15

C658

0.1/25

CN651

QGF1016F3-19

C693

R293

1K

C291

47/10

SHEET 3/9

CD signal VIDEO signal

R251

33P

C251

MLD

SQCK

BLKCK

SENSE

/TLOCK

/FLOCK

1K

1K1K1K

1K

R656

R657

R647

R648

R649

R650

IC651

MN662748RPMFA

68k

R684

5.6K

NI

R669

330

R664

1

C666

1.5M C667

C665

0.15

R668

QGA2001F1-06

E406784+001

ESB110-005

1

E406783-001

QGA2001C1-06

FM-

SM+

R832

SM-

10K

FM+

R831

150

CN801

P011

IC801

R808

27K

ECM ECS

R809

R807

1.2K

390P

C812

C813

SM- T-

SM+

FM+

FM-

1.2K

R805

13K

TVD

R806

TRV

24K

SHEET 6/9

ABCD E F G

2-7

Head amplifer section

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

QSW0859-001

SW316

27K

R3370

R3368

R3379

20K

47K

R3344

220K

KRC107M-T

IC303

SG-105F3-BB,C

10K

22K

Q3317

BU4094BCF

IC332

D3309

C3342

R3383

MTZJ5.1B-T2

R3355

3.3K

4.7/25

R3336

3.9K

470

R3335

2.2K

D302 1SR139-400-T2

KRA102M-T

R3369

100

VGP2401-00A

Q3324

IC331

SG-105F3-BB,C

R3362

C3336

0.01

R3353

4.7K

24K

A/B

C3327

VGP2401-00A

CN333 QGB2011L1-10

CN303 QGB2011M1-10

D3308 MTZJ5.1B-T2

R3348

47/16

SW305

SW304

SW303

R3366

MSI-5U2LWA

FW301 QUM154-10Z4Z4

VR301

QVP0008-103Z

R3345

Q3316

KTA1267/YG/-T

R3367

10K

C3341

100/10

2.2k

R3347

3.9K

390

R3213

270

C3204

R3205

5

BA3126N

IC301

A/B

C3103

820P

C3316

C3203

820P

R3378

47

R3220

47

IC302

AN7345K

R3319

47

R3105

47

C3101

10P

0.01

CN301

TP3301

QGF1205F1-06

CN302 QGF1205F1-06

R3327

470K

C3501

C3346 560P

C3601

820p 820p

C3345

330P

C3102

C3202

C3301

100/10

330P

QQR0621-001Z

L3202

R3330

10K

R3331

10K

RECH

R3301

220

R3203 18K

R3103

18K

VR101

QVPA603-503AZ

VR201

QVPA603-503AZ

C3344

4700P

VGH0424-037

4

VGH0425-544

3

2

220P

C3201

10P

220P

C3104

R3105

L3301

QQR1118-001

100/10

C3105

22

C3205

100/10

C3206

0.033

C3106

0.033

R3208

240

R3207

2.2K

R3206

3.9K

4.7/25

C3220

C3207

33P

C3120

33P

R3106

4.7/25

3.9K

C3107

R3107

2.2K

C3116

R3108 240

22

C3313 100/10

R3114

R3214

C3216

0.015

C3215

0.0082

1.2K

R3212

C3213

5.6K

R3211

4.7/25

10/16

C3214

C3212

0.1/50

C3211

4.7/25

0.1/50

4.7/25

10/16

C3111

C3304

0.0082

390

VQP0033-100Z

C3114

C3112

C3113

0.0033

0.015

C3115

1.2K

270

R3112

R3113

L3303

R3376

C3314 C3315

1.5

Q3305

2SC2001( K)

0.0033

0.039

C3305

10

Q3302

2SC2001( K)

2.2

R3374

R3311

4.7

C3555

39K

R3304

C3219

0.056

C3303

22/16

1000p

R3111

5.6K

R3217

C3502

C3119

0.056

R3117

C3306 220/6.3

270p

3.3K

R3218

0.022

1.5K

2SC3576-JVC-T

C3302 100/10

2SC3576-JVC-T

1.5K

R3118

R3314

100

Q3205

R3302

100

R3221

1.2K

C3602

R3121

1.2K

270p

Q3105

R3315

15K

C3308

0.0015

Q3323

KRC104M-T

R3220

R3219

20K

R3119

R3120

1K

C3340

0.01

20K

R3309

1.5K

RECB

RMUTE

C3339

100/10

Q3313

KTC3199/GL/-T

R3351 150

QSW0832-001

R3361

Q3312 2SB562( C)

SW302

C3335

0.01

R3350

4.7K

SW306

39K

QSW0859-001

R3359

10K

TKEY1

TKEY2

D3307

MTZJ5.1B-T2

KTC3199/GL/-T

PHA

PHB

Q3315

R3354 150

D311

1SR139-400-T2

Q3314 2SB562( C)

RECB

CN305

QGF1205F1-10

1

TAPE P.B. signal

SHEET 3/9 SHEET 4/9

TKEY1

TKEY2

PHB

QGF1205F1-09

PHA

CN306

Parts are safety assurance parts. When replacing those parts make sure to use the specified.

2-8

SHEET 7/9

HABC DEFG

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Tuner section

5

TU1

*R1

4

R8( D2)

D1

C1

C3

0.022

J1

QNB0014-001

1SS133-T2

D3

D4

1SS133-T2

10/16

*R5

CF1

VCF2L3B-105Z

R3

*R4

220K

Q1

C2

R2

C4

2SC2814/4-5/-X

*R6

0.01

330

100/10

C25

C15 12P

X1

C16

12P

3

L1

QQR0796-002

C12

C13

0.047

10K

R13

R15

3.3k

2

C11

0.1

12P

R14

100K

R16

4.7K

C14

R17

100/10

68( 1/4W) FR

C7

0.001

IC2

QAX0402-001

150P

C22

150P

C23

150P

C24

0.0039

R23

1.8k

R10

2.2K

LC72136N

C17

C18

0.47/50

22/16

3.3K

C52

C53

0.27 C51

1/50

C57

0.001

R41

LA1838

IC1

CF2

VCF2L3B-105Z

C54

0.047

C20 1000P

0.047

C19

R26

2.2K

330

4.7k

R22

1K

R18

R19

R20

R25

R21

5.6K

Q5 DTA114YKA-X

R30

1.2K

R29

10K

R24

R27

R28

10K

C6

0.001

D11

T1

QQR0793-001

1SS133-T2

C48

0.0022

C49

470P

C50

C58

0.047

22/16

C32

0.047

C31

22/16

C21

0.022

0

R60

24K

R40

C46

0.047

C33

R33

C47

0.027

47

R34C34

0.022

0.047

C35

5.6k

R35

CF3 QAX0610-001Z

330

C60

1/50

R38

C45 10/16

56K 56K

C44 10/16

R39

*C43

*C42

C41

10/16

C40

10/16

R37

10K

R36

3.3K 1/50

0.22/50

C38

C37

1/50

C39

C36 1/50

C30

100/10

R32

1K

C26

0.001

C27

0.001

R31 1K

DATA

GND

SHEET 3/9

QGF1205F1-09

TUNER signal

CN1

5.6V

LOUT

ROUT

STEREOCE9V

CK

1

Parts are safety assurance parts. When replacing those parts make sure to use the specified.

SHEET 8/9

ABCD E F G

2-9

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

VCD section

VCC

LA11

LA9

LA8

LA13

LA14

LA17

5

LA16

LA15

LA12

AT27C020-70JC3

LA7

LA5

LA6

IC102

LA4

LA3

LD7

LA10

/LOE

/LROMCE

LD6

LD5

LD4

LD3

LD2

LD1

LD0

LA0

LA1

LA2

D102

NI

D101

NI

0.1

75

C116

R134

R133

4.7k

R138

LR

AUDATA

BCLK

ARFS

LA2

DA7

LA0

LA1

ES3880F

DA8

DBUS0

/LCS1

4.7k

R101

IC101

DBUS1

DBUS2

DGND

/LOE

/LROMCE

DBUS3

DBUS4

DBUS5

LD7

DBUS6

LD6

DBUS7

LD5

DBUS8

LD4

DBUS9

LD2

LD3

DBUS10

DBUS11

LD0

LD1

DBUS12

DBUS13

AUX5

AUX7

DBUS14

AUX6

DBUS15

/RSTOUT

DGND

C102

VDD3

C103

27p

C113

X101

C115

27p

C114 L102

1000p

C129

135M10

PCKCSCN

0.1

HSYNC

VSYNC

DGND

0.1

DGND

R128

33

R130

33

R135

10

R136

10

YUV7 YUV6

YUV5 YUV4 YUV3 YUV2 YUV1 YUV0

0.1

C104

10

135M10 PCKCSCN MPUCLK HSYNC VSYNC

AUX3 AUX2

AUX1 AUX0

LD7

LD6

LD5

LD4

LD3

LD2

LD1

YUV7 YUV6 YUV5 YUV4

C126

0.1

YUV3

YUV2

YUV1

YUV0

C127

0.1

LD0

/LCS1

QAX0700-001Z

R121

3.3u

100k

C120

0.1

VDAC

IC104

ES3883F

33

4.7k R102

R139

AUX5

MPUCLK

AUDIOCLK

DGND

D103

R141 10k

NI

R148 1K

C137

0.01U

0.1

C107

4

VCC

10u

C106

4.7k

R107

SCLK DATA WCLK

4.7k

R108

C105

0.1

LA12 LA13 LA14

4.7k

LA15 LA16 LA17

R106

C101

0.1

DGND

/DOE

/DCAS0

/RAS /DWE

DGND

1k

R109

AUDIOCLK

AUDATA

BCLK

LR

AUX0

AIN ARCLK ARFS

220

SCLK WCLK

220 220

DATA

4.7k

3

SHEET 6/9

2

CN101 QGF1016F3-15

R103

DGND

R104

R105

R112

R113

R111

R145 R147 R146

AUX1 AUX3

AUX7 AUX2 AUX6

LA11

LA10

LA7

LA8

LA9

LA3

LA4

LA5

LA6

DA0

DA1

DA2

DA3

DA4

DA5

DA6

R118

NI

C118

L101

C131

MIC1 AOL+

AOR+

3.3U

Q101

NI

0.1

47

NQR0398-006X

VGND

C117

C128

C111

K101

C130

100

K102

NQR0398-006X

0.1

4.7k

R140

C112

470p470p

VCC

K103

100 C132

K104

DGND

IC105

C122

VCCVCC

C135

47

100

VCC

NRSA02J-102X

DGND

C136

0.1

CN102

QGF1016F3-15

SHEET 3/9

DGND

C123

VDD3

RT9161/A-36CG-X

NRSA02J-180X

0.1

0.1 C125

C133

C124

47

ARCLK

AIN

4.7k

R137

0

0.1

AOLAOR-

R119

75

R120

0.1 C121

R132

270

VCC

C109

C138

100

0.1 DGND

DBUS0 DBUS1 DBUS2 DBUS3

DBUS4 DBUS5 DBUS6 DBUS7

/DWE

1

/DRAS

DA0 DA1 DA2 DA3 DA4

C134

10

GLT44016-35J

C110

0.1

IC103

DBUS15 DBUS14 DBUS13 DBUS12

DBUS11 DBUS10 DBUS9 DBUS8

/DCAS0

/DOE DA8 DA7 DA6 DA5

VIDEO signal

SHEET 9/9

2-10

HABC DEFG

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Printed circuit boards

CD+8V

19

Q402

4

CN209

C432

2

1

FT522

FT512

FT521

FT511

3

CN220

FL1 NC FL2

1

CN871

CN870

C888

1

C995

R998

R433

R886

C587 R586

B

D585

C586

E

17

1

R588

C589

R587

R435

FLBIAS

5.6V[SUBTR.]

AUXMUTE

VOLDATA

E

Q586

C588

B

A.GND

SURR.

PBMUTE

BASS1 BASS2

RELAY

VOLCK

CN871

T003A

Q585

C585

-32V

5.6V

POUT

R585

C403

R993

10

[C406]

C404

C401

B

R407

R995

B

13

CN315

R406

1

E

[C405]

R401

Q999

R776

R997

C887

R402

C402

L401

17

TW11

1

17

5

FW401

1

D593

R777

L546

CN11

9

Q401

R405

R994

TW8

TW9

E

C994

T003A

Q250

9V

MIC

PRT

R253

S1

1

R250

D256

C251

D252

RY3

S2CTS2S1S4

CN214

CN251

C250

C252

FT112

S500

S4

7

D253

R254

L250

FT111

CN250

CN219

FT132

Main board

MCS

CN315

MGND

M+B MSI

PBR AGND PBL SW8V RECR

NC

RECL

/CDMRST

C1203

CN661

BU+5

10

1

17

1

R888

C1204

DGND

R1202

TW18

C433

DGND

CDL

RDSCLK

RDSDATA

SPISIG

/CDMRST

SMUTE

CN870

AGND

D.GND

SDATA

MSTAT KCMND

TUCE

MSI2

R887

ECO

MCS

MPX

AGND

NC

CK

NC

C886

CD+8V

MGND

CDR

MGND

R403

R404

B

E

L566

C1205

C1202

C1201

19

-9V

5.6V

5V[VCD]

NC

9V

8V

PRT

SWFB

SURR

ECO

CN211

5.6V[SUB.T]

C509

C443

R492

C462

R490

C461

TW14

IC481

R437

1

VSW5V

C1229

D502

R502

C502

C997

VSW5V

CN212

IC501

C889

VDGND

TW19

R436

POUT

1

C486

CVOUT

15

CN212

M.GND

C444

VGND

D501

C436

C507

VGND

D.GND

C489

MIC

CD.GND

A.GND

R507

R488

R432

R467

MICA.GND

NC

10

TW4

-30V

VGND

VDGND

RELAY

FLBIAS

10

C475

C466

RDSCLK

13

C483

C484

C471

D434

RDSDA9VDGND

C472

C1228

C469

R495

C468

DGND

R471

IC466

TW7

TUR

AGND

TUNER+B

TUL

C481

C482

C470

R466

R1209

C505

R503

R508

C504

R498

R485

R487

R486

C487

R468

R431

R470

R469

C476

R474

15

CN504

NC

L571

CK

MPX

KCMND

MCS

MSTAT

/CDMRST

R1208

C467

CN661

MSTAT

KCMND

PONNCTX

1

SDATA

TUCE

CN11

1

R996

C474

R472

C473

B132

R473

R475

5

FW401

NC

1

R1203

R1204

R1205

R1201

R1206

R1207

C1207

C1206

1

CN211

11

1

5

Q483

LEFT

R532

C571

R412

C527

D586

R572

R571

C528

R575

R537

C535

IC526

C526

D432

D431

C534

R564

R563

B

E

B

E

TP1

R444

E

R443

B

R410

C440

C447

R414

C412

R411

C411 R413

TW17

L568

TW3

Q573

C530

B

E

C532

R528

R541

R417

R420

R534

R530

C531

R526

R529

FW714

6

MAINR A.GND

MAINL SW.GND SW SMUTE

1

B

GND

Q412

RIGHT

Q413

J411

R421

R536

4

R419

Q411

C414

R416

C413

BE

R415

R418

E

3

2

C416

1

JA566

D412 C415 D411

D414 D413

J426

C426

D426

R426

C427

L572

C593

L567

C594

D587

R593

C448

C449

C439

C596

R557

Q562

C450

IC571

IC502

L573

C575

R496

Q557 E

E

B

C445

R531

Q556

R560

C576

C598

R576

TW10

C556

R596

C597

R595

R438

C460

R439

1

TW12

C578

R581

D571

R579

R580

B

E

C458

R506

C1227

R493

C503

C996

B

FW714

Q590

C456

C454

D572

R524

R597

R494

C441

R599

C453

R510

C508

R517

TW15

Q571

B TW16

R577

C577

R523

C514

1

R558

R562

C446

R505

1

TW6

R582

E

R583

Q572

B

R518

C510

R511

R519

R504

R501

R513

C501

R512

C485

6

R489

R491

Q481

EB

Q482

E

B

R440

R441

C457

C459

C455

R442

IC436

C438

C437

C442

C998

C999

Q589

E

R598

CN504

E

1

T003A

CN208

FT131

3

1

Transformer board

Eco board

ABCD E F G

2-11

Regulation & amplifer board

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Regulation board

D211

5

D213

D212

D214

4

7

Preset/ tuning switch board

1

FW901

DGND

SEARCHLED

NC

7

R901

R.SEARCH

F.SEARCH

7

5V

KEY21

FW901

3

1

CN204

C212

R249

R904

C213

R247

C211

EP201

R209

C201

C221

R217

R218

R216

D905

R202

C202

D204

D202

C203

D203

D201

R246

B

Q901

C901

D233

R248

JS901

E

C902

D904

D234

C214

C215

D220

R205

C222

C253

D217

D227

D223

C216

C217

R204

C204

C205

R203

Q201

D218

C218

C219

R215

10

FL1

FL2

RELAY

INH

-30V

CDD.GND

CN202

D219

C220

A.GND

D.GND

M.GND

POUT

R242

D221

1

R207

C223

R210

Q240

C281

1

ECO

SWFB

PRT

5.6V8V9V

SURRCTRL

5.6V

CN201

D280

C280

R281

R283

Q204

14

R284

10

CN205

CN207

11

10V

-9V

3.3V

1

CN207

RELAY

B2

10

1

M.GND

MAINR

14

MAINL

PRT

SURR

POUT

SWL

SWR

CN205

MAINR

SWLGND

-VL

8V

MRGND

MAINL

SWRGND

SWR

VHVLP.GND

-VH 1

MLGND

SWL

1

Amplifer board

1

IC602

R908

S902

2

1

T001C

C604

R676

SMUTE S/WIN

A.GND MAINL

A.GND

MAINR

R736

R734

B

Q737

C625

Q734

BE

Q736

B

R604

E

T001C

C606

S901

C608

R606

R681

R601

R658

Q604

B

E

C639

C622

Q613 R682 R680

Q680

B

R735

R733

R659

A.GND

HPR

E

Q735

Q733

E

FAN[-]

HPL

FAN[+]

E

CN705

B

R620

C614

B

D620

R618

Q612

Q602

R667

E

B

C602

R668

R623

R792

B

R796

R797

R798

R795

R616

R793 B

R655

R654

C610

R608

R674

C618

C616

L602

R614

R

R640

C790

Q792

E

Q790

E

B

Q791

R794

D619

B

Q601

R675

R653

R617

C623

R619

C601

R621

R603

R652

C603

R791

R725

C713

D791

C707

C715

C726

R762

C705 C709

R707

L701

R

R754

R718

Q702

C730

R720

R740

R790

E

Q726

R730

B

C612

C615

C613

R615

E

R613

R657

C621

C605

C609

R607

L702

C683

C607

C739

R605

L

L601

C704

R704

R703

Q603

C703

D622

R602

C710

R708

R776

C722

R716

C721

R775

C708

C706

R714

C716

R766

R705

C714

R726

D704

D724

R774

R724

C711

E

L

R753

E

B

R719

D726

D790

R727

Q710

B

E

Q701

R787

B

R761

R717

D719

Q711

B

C723

R768

R769

EB

R729

Q727

C729

R722

1

D703

D723

R723

C712

Q713

B

E

R777

R701

R702

R778

C731

E

Q728

E

B

R721

R786

D728

Q712

R728

CN215

1

Q374

R383

B

-VH

14

VH VL A.GND

-VL 12V M.GND PRT SURR POUT SWL SWR MAINL MAINR

1

CN206

E

B

R389

Q373

BE

T001C

R385

R384 D369

B

E

Q371

4

B

Q372

NC

S4

D.GND

CN206

1

10

8

C372

E

C373

GND

ECO

5.6V

CN203

M.GND

1

A.GND

C374

POUT

8V

9V

10V

3.3V

5.6V

8

10

D370

2-12

HABC DEFG

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

Front board

T001B

R205

L815

C815

1

VOL+

TAPELED

VOL-

SMODE+

SMODE-

BASSVOL-

BASSVOL+

KEY4

C817

KEY41

KEY3

KEY2

C221

KEY21

D220

KEY32

R899

AUXLED

,CDLED

SMLED

L806

BASSLED

TULED

DGND

L805

C222

R151

24

ECHO2

ECHO1

AGND

MIC

5V

HP

9V

CN880

5

R884

IC830

D815

R840

R827

R843

R848

R969

4

3

2

R962

R871

R872

R870

R874

R873

R869

R868

R867

B

E

Q811

B

68

B

Q961

R921 R965 R963

S963

R865

Q810

Q809

Q858

B

Q813

E

R837

Q812

E

R964

E

S964

IC951

D962

R866

R858

C840

C835

R859

D816

R826

D832

C836

R961

R857

R895

C832

C862

R856

R893

R825

R850

R864

1

R877

C875

18

C872

R824

R823

B

RA802

T001B

L807

C873

R878

C874

9

IC812

R860

10

B

Q860

E

D860

R862

R849

50

51

Q817 E

75 Q816 E

1

A.GND

M.GND

D.GND

S4

R301

Q301

D301

C857

26

E

RY301

POUT

R861

CN216

C362

R366

C309

D314

C310

25

9V8V5.6V

D.GND

L872

76

A.GND

D362

X802

10V

3.3V

10V

R367

R360

1

CP301

Voltage board

ABCD E F G

Display & system control board

R894

R817

R818

L802

R968

D804

C307

R803

D313

R820

R879

D307

R845

Q304

R804

E

C810

C809

C808

R846

R841

R839

D831

R891

E

B

E

3.3V

Q303

OUT

IC301

6V

OUT

IC305

9V

OUT

IC303

D316

8V

Q361

E

Q360

5V

B

C804

R303

C305

R302

IC304

C813

RA801

10

OUT

C360

R365 R364

R361

100

C306

1

IC810

D360 D361

R806

C803

C812

E

D312

R801

L803

Q802

C821

C805

X801

R819

R890

B

Q890

B

Q879

D311

E

Q302

D308

C302

C301

C312

D315

C311

C308

R362

R368

C361

R363

Q362

CP302

C831

R854

R880

C807

R994

C806

E

R851

R836

Q801

R802

R847

E

B

D805

R835

SWRGND

SWLGND

RELAY

D873

C889

R838

S/WL

MLGND S/WRD

MAINL MRGND MAINR

C233

R834

Operation switch board

L1003

R962

R1062

R1071

R1069

TW801

C1006

R934

D1062

S935

S933

S932

S931

S942

S943

S952

C1021

TW800

1

FW713

TIMER/CLOCK

PROGRAM

RANDOM

REPEAT

REVMODE

STOP

RECSTART

R1061

J1021

R1021

C1005

L1002

J1001

C1002

C1001

L1001

C1004

MODE

DISPLAY

S944

R943

EON

R963

R964

+

SELECT

-

1

CN890

22

R1022

PTY/

R945

S945

S946

R946

S947

CDREC

S948

R947

EDIT

S949

DUBBING

S950

C1022

C1023

FORUSERIES

EXCEPTUP&UY

R944

R948

R949

R950

24

MIC1

J1022

MIC2

24

22

R233

1

3

R234

FW230

R822

R828

R991

Q875

E

R811

C822

B

R814

R855

R832

R833

FL801

R831

R881

R882

R883

R812

C825

1

R813

1

C838

19

B

E

R842

18

C837

R896

R844

R810

L813

L801

IC811

CN880

R992

R912

R911

Q877

EBB

E

Q878

D812

D801

D806

R906

B

Q906

Q905

E

7

CN911

1

CD eject board

FW915

R915

C651

D918

R916

R918

Q918

T001B

1

BE

C653

R651

D650

R917

S916

R919

D919

1

J81

C732

EB Q919

CD2LED

CD3LED

C734

S915

C652

1

R650

C654

CN217

B2

10

D920

CD1LED

RY2

D.GND

K12

R732

K11

C735

S917

R731

7

R920

FW915

5V

7

Q1022

B

R1043

Q1023

EB

R1044

E

R1045

Q1021

B

10

L812

R853

R876

D803

D807

D802

R807

R808

R905

R815

R816

PHOTOB

SLCKEY2

C736

C737

DGND

R902

R998

1

SLCCE

5V

DATACKSLCKEY1

R897

S998

9

PHOTOA

E Q920

B

C733

C1035

CN316

RY1

R1041

C1040

R1032

9

R1038

10

R1034

C1038

E

Q908

Q907

B

R996

7 KEY215VR.SEARCH

F.SEARCH

SOUNDMODE

C1043

C1045

R1031

R1033

R1042

R889

FW915

R970

R995

S997

1

SEARCHLED

DGND

KEY22

D957

Q956

C1044

CN860

1

B

E

R1037

17

1

CN911

R1036

,

C961

CN861

1

CD3LED

R956

C960

CD2LED

S995

Q960

FLBIAS

-32V AGND MIC 9V 5V[ST] 5V SURR PBMUTE BASS1 BASS2 AUXMT RELAY POUT

PRT

ECON RDSCLK DGND RDSDT MRDY

CK SDATA KCLK MSTAT KCMND C3RST TUCE SMUTE INH MPX MSI

CD1LED

D960

T001B

VOL-DATA VOL-CLK

SPI_IN

CN890

1

TPLED SMVOL+ SMVOL-

BASSVOLBASSVOL+

R960

C957

22

24

D961

KEY42

KEY21 KEY31

AUXLED

SMLED

CDLED BSSLED

TULED

MIXIN

7

1

DGND

KEY11

KEY1

5V

S996

C956

JS956

BE

VOLUME

SUBWOOFER

VOLVOL+

KEY4

KEY3 KEY2

DGND

AGND

R930

R954

5V HP 9V

R1064

D941

R940

D940

R941

D954

R953

R1065

R1063

8

D1061

IC901

R1068

E

D1021

R1040

R1039

1

IC902

18

C1039

C1037

C1036

R1035

C1034

C

E

B

R885

R886

R887

R888

C816

C823

B

E

R993

R997

S999

T001B

JS960

D956

T001B

1

B

D953

VOLUME

C1066

D944

D943

1

D1003

HPR

HPL

FW713

AGND

D945

AUX

S937

S936

R951

C1063

C1070

S939

S938

R937

R936

Q953

R1070

B

C935

R939

R935

FM/AM

R938

CD

R932 R933

R931

TAPE

DECKA/B

R955

STOP

R952

E

R929

R961

C962

C963

C1067

MICLEVEL

VR901

C1061

R1067

C1064

E

Q940

R942

E

Q941

Q954

E

D942

S951

B

JS962

C1068

C1062

R1066

E

Q1061

C1065

Speaker terminal board

2-13

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

MX-GT98V/MX-GT95V/MX-GT88V MX-GT85V/MX-G78V/MX-G75V

Head amplifer & mechanism control board

5

4

3

2

CD servo cotrol board

M851

C254

R888

R657

CN601

R648

R602

R649

R889 R890 R891

B647

C816

C633

X251

R636

R880 R881 R882 R883

C251

R251

R601

R892 R893

R635 R634 C632

R608

R614

C605

R607 R604 C606 R603

R682

R808

B653

R809

R807

C812

C813

C608

R642

C676

R641

C641

C642

R806 R805

R813 C801 C802 R803 R804

C811 B650 B651 B652

C253

R851 R853

R852

R854

R831

R832

B625

R811

C822

R658

R659

R812

C815

IC801

C821

R802 R801

C604

C814

C603

C601

C602 R620 B648

R621

R619

R625

R618

R650

C252

R894

R622

R623

B604

R652

R632 Q631

R653

R683

R895

R253

R624 R631

R261 R262 R263 R294

R616 C616 C615 C614

R656

R651

R254 R256

R255

R647

R885 R887

C621

L853

C859

C860

L854

M852

R871

R872

R864

R865

R873

R866

R876

B609

R863

R875

R862

R874

R291

R685

R663

R292

R861

Q291

C291

R293

C673

C677

R666

C656 R665

C651

C668

R670

R669

C667

B621

C680

C679

R664

C666

C665

R668 C663

B622

B611

B638

C661

C618

C622

C607

W601

R884 R886

CN855

R257 R259

R258

B603

R646

R654

C657

C655

C653

C610

C612

R661

R615

B637 C617

R662 C664 R264 Q632

R617

IC601

C620

C613

B639

C611

C619

R610

C631

R633 C623

C624

B640

B641

R611

R613

R609

R691

C669

CN851

C853 R855

C854 R856

L851

C852

C658

B649

R692

C694

C693

R660

X651

R677

C652

R606

R667

B605

R676

R684

R672

C672

C671

B602

R674

R679

R675 R673

R686

IC852

R688 R687

R678

B630B631

D851

Q842

IC851

R842

B654

C855

B655

CN854

B601

CN651

R252

C659

CN151

1

2-14

HABC DEFG

MX-GT98V/MX-GT95V/MX-GT88V

MX-GT85V/MX-G78V/MX-G75V

VCD board

(Reverse side)

5

(Forward side)

CN101

C138

C105

R106

IC102

R107

R108

C109

R101

R109

C101

IC103

C107

R105

C106

IC101

C103

C102

R145

R147

R104

R146

R103

R111

R113

R112

IC104

C104

R128 R130 R135 R136

C110

IC105

C129

C127

C126

C114

CN102

C112

D102

C130

R132

R133

C131

R141

C116

D101

C118

R138

C121

C128

C111

C117

L101

C124

Q101

C125

R140

R137

R119

R118

R120

K103

C123

C122

C133

C132

K104

K102

C136

C135

K101

C113

C115

X101

R121

R134

R139 R102

R148

C120

C137

L102

C134

4

Tuner board

3

2

1

A

BC D

2-15

JVC MXGT-85-V, MXGT-88-V, MXGT-95-V, MXGT-98-V, MXG-75-V Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important for laser products

Preventing static electricity

Disassembly method

Adjustment method

Flow of functional operation until TOC read

Maintenance of laser pickup

Replacement of laser pickup

Description of major ICs

Block diagram

Standard schematic diagrams

Printed circuit boards