JVC MX-J770V, MX-J880V Service Manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MX-J770V MX-J880V

SOUND

VOCAL

SLEEPECHO

MODE

MASKING

FM MODE

STILL

V.INTRO

SUBTITLEHIGHLIGHT

TAPE

A/B

REC

START/STOP

ON SCREEN

KEY CONTROL

SELECT FADE MUTING

RM–SMXJ770V REMOTE CONTROL

This illustration is MX-J770V

Each difference point

Model CD/DECK/RECEIVER SPEAKER

MX-J770V CA-MXJ770V

MX-J880V CA-MXJ880V

SP-MXJ770V SP-MXJ880V

Tray fitting

Silver

Area Suffix

US UX

Color

Panel

Silver & blue Silver

Champagne-gold Champagne-gold

Net Front

Light blue

Gray

Singapore

Saudi Arabia

COMPACT

SUPER VIDEO

COMPACT

DIGITAL VIDEO

COMPACT

DIGITAL AUDIO

Contents

Safety precautions Important for laser products Preventing static electricity Precautions at disassembly and parts replacement Disassembly method Adjustment method

1-2 1-3 1-4

1-5 1-6 1-31

Diagnosis which uses extension wire method Flow of functional operation until TOC read Maintenance of laser pickup Replacement of laser pickup Description of major ICs

1-35

1-36 1-37 1-37 1-38

No.20861

Jul. 2000

MX-J770V/MX-J880V

Safety Precautions

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 proper ty damage resulting therefrom.

3. Many electrical and mechanical par ts 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 or iginal 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, par ticularly 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.

Warning

1. This equipment has been designed and manufactured to meet international safety standards.

2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.

3. Repairs must be made in accordance with the relevant safety standards.

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

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

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

1-2

CAUTION

!

Important for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

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

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

5.CAUTION : If safety switches malfunction, the laser is able to function.

6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure.

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.

ADVARSEL : Usynlig laserstråling ved åbning , når

sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når

sikkerhetsbryteren er avslott. unngå utsettelse for stråling.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

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

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)

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

!

CAUTION

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

CLASS 1 LASER PRODUCT

MX-J770V/MX-J880V

1-3

MX-J770V/MX-J880V

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.

CD changer mechanism

assembly

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.

1-4

CD traverse

unit

Flexible cable

Fig.1

Soldering

Fig.2

MX-J770V/MX-J880V

Precautions at disassembling and parts replacement

This model is charged with electricity on the power board even if the power cord is unplugged. Therefore, always discharge electricity in accordance with the steps given below before starting disassembling of the unit and/or replacement of parts.

While referring to the disassembling steps, remove the

1. metal cover and the CD changer mechanism.

Set electrical resistances of 1kohm, 1/4W to the places between

2. the + and - terminals of condensers VH(C204, C205) and VL(C214, C215) on the power board, and discharge electricity for 4 ~ 5 seconds. Connection should be made at first for VH.

C214

C215

C205

C204

Power board

1-5

MX-J770V/MX-J880V

Disassembly method

Removing the metal cover

(See Fig.1 to 3)

1.

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

2.

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

3.

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

ATTENTION:

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

A

Metal cover

A

Fig.1

B

Fig.2

Metal cover

Fig.3

B

1-6

MX-J770V/MX-J880V

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

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

1.

For the card wire connecting the CD changer mechanism board and the main board, disconnect it from connector CN868 on the main board.

2.

Remove the two screws C attaching the CD changer mechanism assembly on both sides of the body.

3.

Remove the two screws D attaching the CD changer mechanism assembly to the rear panel. Remove the screw E attaching the AUX terminal, two screws

F attaching main speakers terminal and two screws H attaching the sub woofers terminal on the back of

the body.

4.

Remove the screw G attaching the CD optical digital output terminal and screw I attaching video out terminal.

5.

Disconnect the harness from connector CN102 on the video CD board, and pull out the earth wire TW100 on the video CD board.

6.

Pull the top of rear panel and the front panel assembly outward respectively, then remove the CD changer mechanism assembly and video out terminal by lifting the rear part of the CD changer mechanism assembly.

CD changer mechanism assembly

Front panel assembly

C

Main board

CN868

CD changer mechanism assembly

Rear panel

CN102

D

Fig.4

Fig.5

CD changer mechanism board

Rear panel

CN870

CN871

Input / output board

Front panel assembly

C

TW100

Rear panel

Removing the video CD board (See Fig.7)

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

1.

Reverse the CD changer mechanism assembly.

2.

Remove the two screws J attaching the bracket.

3.

Remove the screw K attaching the video CD board.

4.

Disconnect the card wire from connector CN100 and CN101 on the video CD board.

5.

At first, remove the claw a. Then remove the claw b while raising the video CD board in the direction of the arrow mark as figure. After removing the claw b, you can removing the video CD board by pulling it backward.

I

G

E

F

SUB WOOFERS

terminal

H

Bracket

Video CD board

CN100

CLAW b

CN101

K

CD changer

mechanism assembly

Fig.6

Fig.7

MAIN SPEAKERS

terminal

J

Video out board

CLAW a

Video CD board

1-7

MX-J770V/MX-J880V

Removing the front panel assembly

(See Fig.8 to 10)

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

1.

Remove the four screws L attaching the front panel assembly on the bottom of the body.

2.

Disconnect the card wire from connector CN865 on the main board and pull out the earth wire on the main board.

3.

Disconnect the card wire from connector CN315 on the input / output board.

4.

Disconnect the harness from connector CN901 on the relay board on the back of the front panel assembly.

5.

Disconnect the harness from connector CN912 on the input / output board.

Front panel assembly

Earth wire

Fig.8

Main board

CN865

L

Front panel assembly

6.

Disconnect connector CN870 and CN871 on the input/output board from the main board.

7.

Release the two joints c and d on the lower part of the sides using a screwdriver, and remove the front panel assembly toward the front.

Front panel assembly

Main board

CN865

CN912

Relay board

CN901

Fig.9

CN871

Joint c

CN870

1-8

CN315

Joint d

Input / output board

Fig.10

Removing the Microphone terminal board assembly (See Fig.11 and 12)

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

1.

Pull out the MIC volume knob from the front side.

2.

Remove the two screws M attaching the microphone terminal board assembly.

3.

Remove the screw N attaching earth wire. Then release the earth wire from the clamp on the upper part of the cassette mechanism assembly.

4.

Remove the microphone terminal board assembly toward you.

MX-J770V/MX-J880V

MIC volume knob

Fig.11

Microphone terminal board assembly

M

Removing the rolling panel assembly

(See Fig.13 and 14)

Prior to performing the following procedure, remove the microphone terminal board assembly.

1.

Disconnect the harness from connector CN900 and the card wire from connector CN906 on the relay board on the back of the rolling panel assembly respectively.

2.

Disconnect the harness from connector CN862, CN863, CN850, CN851 and CN815 on the main board respectively. Disconnect the card wire from connector CN880 on the main board.

3.

Disconnect the card wire from connector CN869 and the harness from CN883 and CN884 on the main board respectively.

Main board

Relay board

CN900

Relay board

CN906

CN883,CN884

O

Rolling panel assembly

CN869

M

N

Fig.12

O

Cassette

mechanism

assembly

Fig.13

CN815

Main board CN850,CN851

4.

Remove the four screws O attaching the rolling panel assembly.

ATTENTION:

For the harness which should be connected to connector CN869, CN883 and CN884 on the main board, get them through the slots under the rolling panel when reattaching the rolling panel assembly to the front panel (Refer to Fig.14)

Main board CN862,CN863

Rolling panel assembly

Main board

CN880

Relay board

CN900

Fig.14

1-9

MX-J770V/MX-J880V

Removing the main board

(See Fig.15 and 16)

Prior to performing the following procedure, remove the front panel assembly, the microphone terminal board and the rolling panel assembly.

1.

Disconnect the harness from connector CN867 on the main board.

2.

Disconnect the card wire from connector CN879 on the main board (Before pulling out the card wire, stand the part e of CN879 as shown in Fig.16).

3.

Remove the two screws P attaching the main board.

Removing the cassette mechanism assembly (See Fig.17)

Rolling panel assembly

P

CN867

CN879

Main board

P

Fig.15

e

CN879

Fig.16

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

1.

Disconnect the card wire from connector CN306 on the cassette mechanism board.

2.

Remove the four screws Q and three screws R attaching the cassette mechanism assembly.

Q

R

CN306

R

Cassette mechanism board

Fig.17

R

Q

1-10

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

Function board1 (See Fig.18)

Remove the two screws S attaching the function board 1.

Function board2 (See Fig.18)

Remove the two screws T attaching the function board 2.

Bass-level regulator board (See Fig.19)

Pull out the sub woofer volume knob on the front side of the front panel assembly and remove the nut attaching the bass-level regulator board.

Release the two joints f. Unsolder FW951 on the bass-level regulator board and disconnect the harness connected to the power switch.

Main volume & headphone board (See Fig.19)

Pull out the volume knob on the front side of the front panel assembly and remove the nut attaching the main volume & headphone board.

Remove the two screws U attaching the main volume & headphone board on the back of the front panel assembly and release the two joints g.

Unsolder FW850 on the main volume & headphone board and disconnect the harness connected to the eject switch board.

Remove the screw V attaching the earth wire extending from the main volume & headphone board.

1.

2.

1.

2.

3.

4.

Removing the boards in the front panel assembly (See Fig.18 to 20)

Fig.18

Fig.19

S

Function

board 1

S

Function

board 2

T

FW850

Eject switch board

Joints g

U

Main volume & headphone board

V

Power switch board

Joints f

Bass-level regulator board

Cassette mechanism assembly

FW951

MX-J770V/MX-J880V

1-11

MX-J770V/MX-J880V

Power switch board (See Fig.20)

1.

Remove the two screws W attaching the power switch board. Unsolder FW951 on the power switch board and disconnect the harness extending to the bass-level regulator board.

Eject switch board (See Fig.20)

1.

Remove the four screws X attaching the eject switch board. Unsolder FW850 on the eject switch board and disconnect the harness extending to the main volume & headphone board.

Remote control port board (See Fig.20)

1.

Remove the screw Y attaching the remote control port board.

Removing the relay board and fixing board (See Fig.21)

Eject switch

board

FW850

X

Main volume & headphone board

Remote control port board

X

Fig.20

Y

W

Power switch board

FW951

Bass-level regulator board

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

There is no need to remove the front panel assembly.

1.

Disconnect the harness from connector CN900 and CN901 on the relay board on the back of the rolling panel assembly.

2.

Disconnect the card wire from connector CN905 and CN906 on the relay board on the back of the rolling panel assembly.

3.

Remove the screw Z attaching the relay board. Remove the relay board from the groove i.

4.

Remove the screw A attaching the fixing board and remove the fixing board from the groove j.

CN900

CN901

Groove i

Relay board

Z

CN905

CN906

Rolling panel assembly

A

Fixing board

Groove j

Fig.21

1-12

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

Remove the two plastic rivets attaching the joint board, and remove the joint board.

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

Remove the two screws B attaching the tuner board on the back of the body.

1.

2.

3.

Removing the tuner board

(See Fig.22 and 23)

Prior to performing the following procedure, remove the tuner board.

Disconnect the card wire from connector CN315 on the input / output board.

Remove the screw C attaching the input / output board on the lower side of the body.

Remove the five screws, E, F & H attaching the AUX, main speakers, sub woofers terminal board on the back of the body.

Remove the screw G attaching the CD optical digital output back of the body.

Disconnect the harness from connector CN912 on the input / output board and pull out the earth wire on the main board.

Disconnect connector CN870, CN871, CN612, CN711 and CN712 on the input / output board by pulling out them outward. Remove the input / output board from the body.

1.

2.

3.

4.

5.

6.

Removing the input / output board

(See Fig.22 and 23)

Fig.22

Fig.23

Tuner board

Plastic rivet

Joint board

Input / output board

Rear panel

CN1

CN871

CN870

C

CN711

CN712

CN315

Rear panel

B

G

E

F

H

MX-J770V/MX-J880V

1-13

MX-J770V/MX-J880V

Removing the rear cover / rear panel

(See Fig.24 to 27)

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

There is no need to remove the front panel assembly.

1.

Remove the two screws D attaching the rear cover on the back of the body.

2.

Remove the five screws E & F, H attaching AUX, main speakers and sub woofers terminal board to the rear panel on the back of the body.

3.

Remove the screw G attaching the CD optical digital output terminal.

4.

Remove the five screws Z attaching the heat sink and the pre-amplifier board to the rear panel on the back of the body.

5.

Remove the two screws Y attaching the voltage selector to the rear panel on the back of the body.

Rear cover

B

Rear panel

D

Fig.24

Heat sink

6.

Remove the screw X attaching the rear panel to the chassis base on the back of the body.

7.

Remove the two screws B attaching the tuner board on the back of the body.

8.

Release the two joints k and l on the rear panel bottom using a screwdriver, and detach the rear panel backward.

Rear panel

G

E

Z

F

H

Z

X

Fig.25

Z

Y

Z

Rear panel

1-14

Fig.27

Joint l

Joint k

Fig.26

Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly, the tuner board, input / output board and the rear cover / rear panel.

There is no need to remove the front panel assembly.

Disconnect the harness from connector CN901 on the relay board on the back of the rolling panel assembly.

Disconnect the harness from connector CN713 on the pre-amplifier board.

Remove the two screws H attaching the heat sink to the power & main amplifier board on the back of the body.

Remove the fore screws I & J attaching the preamplifier board and IC to the heat sink.

Remove the bracket, then detach the pre-amplifier board from the heat sink.

1.

2.

3.

4.

5.

Removing the pre-amplifier board / heat sink (See Fig.28 to 30)

Fig.28

Fig.29

Fig.30

Pre-amplifier board

CN713

Relay board

CN901

Pre-amplifier board

Power & main amplifier board

Heat sink

H

Heat sink

Pre-amplifier board

Bracket

I

J

IC

MX-J770V/MX-J880V

1-15

MX-J770V/MX-J880V

Removing the power & main amplifier board (See Fig.31 and 32)

Prior to performing the following procedure, remove the metal cover, the CD changer mechanism assembly, the rear cover / rear panel, the tuner board, the input / output board and the pre-amplifier board.

1.

Remove the four screws K attaching the transf. on the power & main amplifier board through the upper side slots.

2.

Remove the two plastic rivets fixing the power & main amplifier board.

3.

Remove the cord stopper by pushing it upward.

4.

Cut off the bands m and n fixing the power cord and unsolder the power cord on the power & main amplifier board.

Power & main amplifier board

Plastic rivet

K

Fig.31

Plastic rivet

K

Power & main amplifier board

Cord stopper

Fig.32

Soldered part

Band m

Band n

1-16

MX-J770V/MX-J880V

Prior to performing the following procedure, remove the rolling panel assembly and the main board.

Remove the two screws L attaching the multi-control assembly on both sides.

Remove the multi-control assembly outward while pushing the right and left hooks fixing multi-control assembly outward respectively.

1.

2.

Removing the multi-control assembly

(See Fig.33 to 35)

Prior to performing the following procedure, remove the rolling panel assembly, the main board and the multi-control assembly.

Remove the four screws M attaching the cover and the bracket.

Pull out the right and left panel holders outward respectively by releasing the tabs o outward.

Remove the cover and the bracket. Remove the two screws N attaching the multi-control

board.

1.

2.

3.

4.

Removing the multi-control board

(See Fig.36 to 38)

L

Multi-control assembly

L

Fig.36

Fig.37

Fig.38

Fig.35

Fig.33

Fig.34

Multi-control assembly

Hook

Bracket

MM

Cover

Bracket

Tab o

Panel holder

N

Multi-control board

1-17

MX-J770V/MX-J880V

Removing the drive motor assembly

(See Fig.39 to 42)

Prior to performing the following procedure, remove the rolling panel assembly and the main board.

1.

Remove the relay board and fixing board (Refer to Fig.21).

2.

Remove the two screws O attaching the motor bracket and remove the motor lead staple p.

3.

Remove the two screws P attaching the shaft bracket.

4.

Remove the motor belt.

5.

Remove the three screws Q attaching the side bracket.

6.

Remove the shaft assembly from the rolling panel assembly by lift up the shaft assembly upward.

7.

Remove the drive motor upward.

CN900

CN901

Groove i

Relay board

Z

CN905

Rolling panel assembly

A

Fixing board

Groove j

CN906

Fig.21

Side bracket

Z

Relay board

P

Shaft bracket

A

Fixing board

Fig.39

O

Motor bracket

Motor belt

Motor lead staple p

Fig.40

1-18

Fig.42

Q

Shaft assembly

Drive motor

Fig.41

MX-J770V/MX-J880V

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

Disconnect the card wire from connector CN101 and CN102 on the super VCD control board.

Remove the two plastic rivets attaching the super VCD control board.

1.

2.

Removing the super VCD control board

(See Fig.43)

Fig.43

CD changer

mechanism assembly

Super VCD control board

Plastic rivet Plastic rivet

CN101

CN102

1-19

MX-J770V/MX-J880V

Bottom

< Speaker section >

Removing the speaker cover (See Fig.1)

1.

Remove the five screws A attaching the speaker cover on the side of the body.

Removing the sub woofer unit (See Fig.2 and 3)

1.

Remove the four screws B attaching the sub woofer unit.

2.

Two plug wires connected with the sub woofer unit are pulled out.

Removing the ornament panel assembly (See Fig.4 to 8)

Remove the saran board from the speaker box.

1. (Saran board can be detached by pulling the side of Saran board forward.)

The plus driver is inserted in the holder, it is lifted,

2. and the holder is removed.

Four holders are removed, and four screws C under

3. that are removed.

Screw

A

Screw A

Speaker cover

Fig.1

Sub woofer

unit

Screw B

Fig.2

Sub woofer

unit

The minus driver is inserted in the concave part in the

4. speaker box bottom and inserts in the interior little by little.

CAUTION : Please apply the felt or the cloth, etc.

to damage neither the ornament panel nor the cabinet when the ornament panel assembly is detached when working.

Two plug wires connected with the

5. middle range unit are pulled out.

Holder

Ornament

panel

assembly

Fig.6

top

Middle range

unit

Plug wire

(Yellow)

Plug wire

(Red)

Fig.3

Saran board

Fig.4

Plug wire

(Black)

Ornament panel assembly

concave part

1-20

Bottom

Fig.7

Ornament

panel

assembly

Plug wire

(Black)

Fig.8

Holder &

screw C

Holder &

screw C

Fig.5

MX-J770V/MX-J880V

Ornament

panel

assembly

Middle range

unit

Fig.11

Fig.10

Fig.9

Screw D

Plug wire

(White)

Plug wire

(Blue)

Screw D

Screw E

Plug wire

(Blue / Black)

Woofer

unit

Plug wire

(Yellow / Black)

Woofer

unit

Remove the ornament panel assembly. Remove the two screws D attaching the middle

range unit. Two plug wires connected with the middle range unit

are pulled out.

1.

2.

3.

Removing the middle range unit (See Fig.9)

Remove the ornament panel assembly. Remove the four screws E attaching the woofer unit. Two plug wires connected with the woofer unit

are pulled out.

1.

2.

3.

Removing the woofer unit (See Fig.10 and 11)

1-21

MX-J770V/MX-J880V

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 two 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.The two screws B is removed and C.B.holder is detached.

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

8.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 C' 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 D retaining the disc stopper

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

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

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

9. the one screw G 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

D

Earth

wire

B

C.B.Holder

Fig.1

Clamper base

b

Rod

c

T.Braket

Fig.2

d

EE

C

a

Lod stopper (C/J version only)

E F

b

Lock lever

Fig.4

1-22

Clamper ass'y

Fig.3

Return spring

G

MX-J770V/MX-J880V

11.

12.

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

Fig.5

Fig.7

Fig.6

Fig.8

Fig.9

[Caution]

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.

13.

14.

15.

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.

CD tray assembly

e

Drive unit of elevator

CD tray assembly

f

Refer to Fig.7

Pawl

Chassis assembly

Pulley gear

Motor pulley

Pawl ,

CD tray assembly

Stopper

g

g'

1-23

MX-J770V/MX-J880V

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 H 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

H

CD loading mechanism assembly

Fig.10

H

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

1-24

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

k

Removing the cam unit (See Fig.14 ~17 )

1.

Remove the CD loading mechanism assembly.

2.

While turning the cam gear "q", align the pawl "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 pawl "s"

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

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

MX-J770V/MX-J880V

Chassis assembly

CN801

CN802

Fig.14

Drive unit

Tray select switch board

Cylinder gear

CN804

Drive unit

r

I

Cam gear q

Fig.15

J

Cams R1, R2 assembly

Cam unit

Fig.16

J

s

Select lever

Fig.17

1-25

MX-J770V/MX-J880V

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

1.

Remove the two screws K retaining the gear bracket (See Fig.19).

2.

While pressing the pawl "t" fixing the gear bracket in the arrow direction, remove the gear bracket (See Fig.19). 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. 20). Remove the belts respectively from the right and left

4. actuator motor pulleys and pulley gears(See Fig. 19). 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. 21).

[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. 22.

Chassis assembly

Pulley gear

Gear bracket

Belt

Motor pulley

K

Fig.18

Actuator motor

Pulley gear Belt

Motor pulley

K

Pawl

t

u

Gear bracket

Fig.19

Assembly and Configuration Diagram

Pulley gear

Gear B

v

Fig.20

Pulley gear

Gear B

Cylinder gear

1-26

Gear C

Select gear

Gross gear L

Fig.21

Gross gear U

Gear C

MX-J770V/MX-J880V

Fig.22

[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).

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

1.

2.

3.

4.

Remove the slit washer fixing the cams R1 and R2 assembly. By removing the two pawls "w" fixing the cam R1, separate R2 from R1. Remove the slit washer fixing the cam gear "q". Pull out the cam gear "q" from the C.G. base assembly.

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

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

Fig.23

Slit washer

Pawl

Cam R2

Slit washer

Cam gear L

Cam switch board

C.G. base assembly

Cam R1

Pawl

Cam gear L

Notch

Cylinder gear

Gear bracket

Cam R1, R2 assembly

Gear unit

Drive unit

x

Pawl

w

L

1-27

MX-J770V/MX-J880V

< 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 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. After dismounting the FPC holder,remove the flexible P.C.board.

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

6. Remove the spring "a" from behind the playback head.

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

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

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

Reassembling the playback, recording

and eraser heads (See Fig.2,3)

Cassette mechanism

Fig.1

Playback/Recording & eraser head

Flexible P.C.board

CN301

Head amplifier & mechanism control P.C. board

Fig.2

Flywheel R

Trigger armHead mount

(Mechanism A side)

Spring "a"

Trigger arm

Flywheel R

(Mechanism A side)

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, and fix it with the FPC holder as shown in Fig.3.

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

1-28

Playback head

Spring "a"

FPC holder

Fig.3

Reversing azimuth screw

Head mount

Flexible P.C.board

CN302

Head amplifier & mechanism control P.C. board

(Mechanism B side)

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

MX-J770V/MX-J880V

1.Remove the cassette mechanism assembly.

2.After turning over the cassette mechanism assembly,remove the five screws "A" retaining the head amp. and mechanism control P.C. board

3.Disconnect the connectors CN303 and CN304 on the P.C.Board and the connectors CN1 on both the right and left side reel pulse P.C.Boards.

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

Removing the capstan motor assembly

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).

A

Flexible board

Head amplifier & mechanism control board

AA

CN304

CN302 CN301

Flexible board

CN303

Fig.4

BB

Capstan motor assembly

AA

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.

Capstan belt A

BBBB

Fig.5

Capstan motor

Capstan belt B

Capstan belt A

Capstan belt B

Motor pulley

Fig.7 Fig.6

1-29

MX-J770V/MX-J880V

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 slit washers "a" and "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 P.C.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"

g

Reel pulse board

1-30

Solenoid

Fig.11

Adjustment method

Measurement instruments required for a djustment

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 VTT712 : For Tape speed and wow flutter ( 3kHz) VTT724 : For Reference level (1kHz) TMT7036 : For Head angle(10kHz),Play back frequency characteristics(1kHz),and dubbing frequency characteristics(63,1,10kHz) Because of frequency-mixed tape with 63,1k,10k and 14kHz(250nWb/m -24dB). Use this tape together with a filter.

7. Blank tape TAPE : AC-225, TAPE : AC-514

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

Measurement conditions

Power supply voltage AC110/127/220-240V(50/60Hz)

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

MX-J770V/MX-J880V

Radio input signal

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

Frequency Range

AM 531kHz~1602kHz FM 87.5MHz~108MHz

Standard measurement positions of volume and switch

Power : Standby (Light STANDBY Indicator) S,A,BASS : OFF Sound mode : OFF Main VOL. : 0 Minimum Travers mecha set position : Disc 1 Mic MIX vol : MAX ECHO : OFF

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.

1-31

MX-J770V/MX-J880V

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

1-32

1.Playback the test tape TMT7036(10kHz).

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 VTT712(3kHz)with the playback mechanism or playback and recording mechanism after ending forward winding of the tape.

Confirmation of head angle

Confirmation of tape speed

Test tape :TMT7036(10kHz) Measurement output terminal :Speaker terminal Speaker R (Load resistor:3 ) :Headphone terminal

Test tape :VTT712(3kHz) or TMT7036(3kHz) Measurement output terminal :Headphone terminal

Maximum output

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

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

VR301

Items Measurement

conditions

Measurement method

Standard

values

Adjusting

positions

Tape recorder section

Items Measurement

conditions

Measurement method

Standard

values

Adjusting

positions

After setting to the double speed motor, confirm that the frequency counter reading becomes 4,800+400/-300Hz when the test tape VTT712 (3kHz) has been play back with the playback mechanism.

When the test tape VTT712(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 VTT712(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).

Double tape speed

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

Wow & flutter

Test tape :TMT7036(10kHz) Measurement output terminal :Speaker terminal Speaker R (Load resistance:3 ) measurement output terminal :Headphone terminal

Test tape :TMT7036(10kHz) Measurement output terminal :Headphone terminal

4,800+400/

-300Hz

60Hz or less

with in

0.25% JIS(WTD)

Playback mechanism side

Both the playback and recording & playback mechanism

Reference values for confirmation items

MX-J770V/MX-J880V

1-33

MX-J770V/MX-J880V

Electrical performance

Items Measurement

Adjustment of recording bias current (Reference value)

conditions *Mode : Forward or reverse mode *Recording mode *Test tape :AC-514 and AC-225 Measurement output terminal :Both recording and headphone terminals

Measurement method

1.With the recording and playback mechanism, load the test tapes(AC-514 to TYP and 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 ) and 4.20 A(TYP ).

Standard

values AC-225 :4.20 A AC-514 :4.0 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-514 Measurement input terminal :OSC IN

1.With the recording and playback mechanism,load the test tape(AC-514 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-514 *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-514 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)

1-34

*Recording and playback side forward or reverse *Recording mode *Test tape :AC-514 and AC-225 Measurement terminal Both of the eraser head

1.With the recording and playback mechanism, load the test tapes(AC-514 to TYP and 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 :120mA TYP :75mA

Diagnosis which uses extension wire method

System control P.C.board

1.Remove the metal cover and CD changer mechanism.

2.Remove the front panel assembly.

3.One screw A is removed, and relay board is removed.

4.As shown in fig.1, place the front panel assembly after opening it outward using the right side of the front panel as an axis.

5.The extension wire is connected with CN870 & CN871 on the INPUT/OUTPUT board and CN860 & CN861 on the main board.

Extension wire parts No.

MX-J770V/MX-J880V

QUQ412-4020CJ

JIG-MXJ500

Input/output board

FLAT WIRE

CONNECTOR Board x 2

FLAT WIRE

CONNECTOR Board x 2

CN870

CN871

A

Relay board

Extension wire

Main board

Front panel assembly

CN860

CN861

Relay board

Fig.1

1-35

MX-J770V/MX-J880V

Flow of functional operation until TOC read

Power ON

Play Key

Slider turns REST SW ON.

Automatic tuning of TE offset

Check Point

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

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)

1-36

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

MX-J770V/MX-J880V

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.

1-37

MX-J770V/MX-J880V

Description of major ICs

AN8806SB-W(IC601) :RF&SERVO AMP

1.Pin layout

PD 1

LD 2 LDON 3 LDP 4 VCC 5 RF- 6 RF OUT 7 RF IN 8

C.AGC 9

ARF 10 C.ENV 11 C.EA 12 CS BDO 13

BDO 14 CS BRT 15 OFTR 16 /NRFDET 17

GND 18

2.Block diagram

36 PDAC 35 PDBD 34 PDF 33 PDE 32 PDER 31 PDFR 30 TBAL 29 FBAL 28 EF27 EF OUT 26 TE25 TE OUT 24 CROSS 23 TE BPF 22 VDET 21 LD OFF 20 VREF 19 ENV

6

728

29

27

910 17

8

11

12 19

+

- +

+

EQ

AGC

RF DET

ENV CURCUIT

36

+

35

+

31

34

-

+

VCBA

-

+

VCBA

-

VCBA

+

OFTR

BDO

+

13 14

15

16

20

+

- +

32

33

+

-

VCBA

+

+ -

+

- +

21

2

+

-

24 25

30

23

26

22

14

3

1-38

3. Pin function

MX-J770V/MX-J880V

Pin No.

1 2

3 4 5 6

7 8

9 10 11 12

13 14 15

16 17 18 19

20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

symbol

PD LD

LD ON

LDP

VCC

RF-

RF OUT

RF IN

C.AGC

ARF

C.ENV

C.EA

CS BDO

BDO

CS BRT

OFTR

/NRFDET

GND ENV

VREF

LD OFF

VDET

TE BPF CROSS TE OUT

TE-

FE OUT

FE-

FBAL

TBAL

PDFR PDER

PDF PDE

PD BD

PD AC

I/O

I

APC amp . Input terminal APC amp . Output terminal

O

LD ON/OFF control terminal

I

Connect to GND

-Power supply

-RF amp . Reversing input terminal

I

RFamp . Output terminal

O

AGC input terminal

I

AGC loop filter connection terminal

I/O

ARF output terminal

O

RF detection capacity connection terminal

I/O

HPF-amp capacity connection terminal

I/O

Capacity connection terminal for RF discernment side envelope detection

I/O

BDO output terminal

O

Capacity connection terminal for RF discernment side envelope detection

I/O

O

OFTR output terminal RFDET output terminal

O

--

Connect to GND

O

3TENV output terminal

O

VREF output terminal

--

APC OFF control terminal

O

VDET output terminal

I

VDET input terminal

O

CROSS output terminal

O

TE amp . Output terminal

I

FE amp . Reversing input terminal

O

FE amp . output terminal

I

FE amp . Reversing input terminal

I

F.BAL control terminal

I

T.BAL control terminal

I/O

I-V amp conversion resistance adjustment terminal

I/O

I-V amp conversion resistance adjustment terminal

I

I-V amp input terminal I-V amp input terminal

I I

I-V amp input terminal

I

I-V amp input terminal

Function

1-39

MX-J770V/MX-J880V

AN7345K(IC302) PB/REC AMP

1.Block diagram

2. Pin Function

Symbol

No.

1

R1

2

R2

L1

L2

NF1

24

1

R1

I/O

I

Playback amplifier input

I

R2

23

2

22

AMP

3

NF2

OUT1

Pre

OUT2

Function

9

EQ

CTL

ALC

10 11

LC

I/O

I

VCC

RF

141516

13

REPPLE

REJ

12

LPF GND

Repple filter

Function

EQ1

CTL1

RIN1

RNF1

ROUT1

2021

EQ

CTRL

5

4

EQ2

CTL2

Pre

Source

CTRL

6

1819

17

78

RIN2

RNF2

Pin No.

13

14

ALC AMP

ROUT2

Symbol

Vcc Power supply

RF

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

ALC low pass filter

I

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

1-40

BA15218(IC481,501,502,526,571):OP AMP.

MX-J770V/MX-J880V

1OUT1

2-IN1

1

EE

3+IN1

+

4

-

2

+

BA3126N (IC301)

1. Terminal layout and Block diagram

8

7

6

5V

VCC

OUT2

-IN2

+IN2

1

REC SW

2

GND

CONT.

P / B SW

543

GND

6

VCC

7

P / B SW

89

GND

REC SW

1-41

MX-J770V/MX-J880V

BA3835S (IC812) : SPI B.P.F.

1.Block Diagrams

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.

1-42

BA3837(IC466):MIC Mixer

1.Block diagram

C

16

B

15

14

MX-J770V/MX-J880V

A

ROUT

13

LP 12

LP

11

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

1-43

MX-J770V/MX-J880V

BU1427K (IC152) : Digital RGB-TV Encoder

1. Terminal layout

2. Pin function

No. NAME FUNCTION

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

* The pin built-in pull-down resister. (30kohm)

BOSD Y0/YUV0 Y1/YUV1 Y2/YUV2 Y3/YUV3 Y4/YUV4 Y5/YUV5 Y6/YUV6 GND Y7/YUV7 UV0 UV1 UV2 UV3 OSDSW CDGSWB UV4 UV5 UV6 UV7 GND NTB IM0 IM1 TEST1 TEST2 VSY HSY PIXCLK VDD IO VDD INT

OSD BLUE DATA INPUT YUV DATA YUV DATA YUV DATA YUV DATA YUV DATA YUV DATA YUV DATA DIGITAL GROUND YUV DATA U V D ATA U V D ATA U V D ATA U V D ATA OSD ENABLE/DISABLE SELECT Video CD/CD-G U V D ATA U V D ATA U V D ATA U V D ATA DIGITAL GROND SELECT NISC/PAL MODE SELECT YUV/YUV SELECT DAC/NORMAL Normally pull down to GND SELECT U/V TIMING V-SYNC INPUT or OUTPUT H-SYNC INPUT or OUTPUT 1/2 freq. of BCLK DIGITAL VDD VDD for I/O Interlace /Non-Interlace

No. NAME FUNCTION

33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

SLABEB ADDH VREF-C CGND COUT VGND VOUT AVSS P-VDD IR AVDD YGND YOUT VDD YFILON2B YCOFF YFILON1B PAL60B VCLK RSTB CLKSW RD0 RD1 RD2 ROSD RD3 BCLK/RD4 RD5 IO VDD RD6 RD7 GOSD

SELECT MASTER/SLAVE +0.5/-0.5 LINE at NON-INTER DAC BIAS CHROMA OUTPUT GROUND CHROMA OUTPUT Composite Output Ground COMPOSITE OUTPUT Analog Ground (DAC, VREF) POWER(DAC) VDD REFERENCE RESISTOR ANALOG (VREF) VDD Luminance Output Ground Luminance Output DIGITAL VDD Y-FILSEL THROU/FILON2 DAC(YOUT,COUT) OFF Y-FILSEL THROU/ FILON1 NORMAL/PAL60 at PALMODE Video Clock Input NORMAL/RESET SEL*1CLK/*2CLK Pull Down to GND Pull Down to GND Pull Down to GND OSD RED DATA INPUT Pull Down to GND BASE CLOCK OUT Pull Down to GND VDD for I/O Pull Down to GND Pull Down to GND OSDGREEN DATA INPUT

1-44

MX-J770V/MX-J880V

STROBE

DATA

CLOCK

Q1 Q2 Q3 Q4

Vss

Vdd OUTPUT ENABLE Q5 Q6 Q7 Q8 Q's Qs

1 2 3 4 5 6 7 8

16 15 14 13 12 11 10

9

1.Pin layout

8-STAGE

SHIFT REGISTER

8-BIT

LATHES

3-STATE

OUTPUTS

1

2

3

15

Q1

Q8

10

9

DATA

CLOCK

STROBE

OUTPUT

ENABLE

PARALLEL OUTPUT

Q's Qs

SERIAL OUTPUT

2.Block diagram

BU4094BCF(IC303,304,811):Serial to parallel port extension

1-45

MX-J770V/MX-J880V

BU9253AS(IC902) : LPF&ECHO MIX.

1.Pin layout & block diagram

1

GND

BIAS

2

COUNTER

3

4

5

ECHO VR

DAINT IN

OSC

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

1-46

MX-J770V/MX-J880V

HY57V161610DTC8 or KM416S1120DT-G8 (IC504,IC505) : 16MB SDRAM

1.Block diagram

CLK CKE

Address

CS RAS CAS

WE

Clock Generator

Mode register

Command decoder

Control logic

Row address buffer & Refresh counter

Column address buffer & burst counter

Bank B

Bank A

Row decoder

Sense amplifier

Column decoder & latch circuit

Data counter

Input & output

Latch circuit

DQM

DQ

buffer

2.Pin function

Pin No. Symbol Description Pin No. Symbol Description

1

2,3

4

5,6

7

8,9

10

11,12

13 14 15 16 17 18

19,20

21~24

25

VCC

DQ0,1

VSS

DQ2,3

VDD

DQ4,5

VSS

DQ6,7

VCC

LDQM

WE CAS RAS

CS

A11,10

A0~3

VCC

Power supply Data input/output Connect to GND Data input/output Power supply Data input/output Connect to GND Data input/output Power supply Lower DQ mask enable Write enable Column address strobe Row address strobe Chip enable Address inputs Address inputs Power supply

26

27~32

33 34 35 36 37 38

39,40

41

42,43

44

45,46

47

48,49

50

VSS

A4~9

NC

CKE

CLK

UDQM

NC

VCC

DQ8,9

VSS

DQ10,11

VDD

DQ12,13

VSS

DQ14,15

VSS

Connect to GND Address inputs Non connect Clock enable System clock input Upper DQ mask enable Non connect Power supply Data input/output Connect to GND Data input/output Power supply Data input/output Connect to GND Data input/output Connect to GND

1-47

MX-J770V/MX-J880V

LA1838(IC102): FM AM IF AMP&detector, FM MPX Decoder

1. Block Diagram 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

AM

OSC

SD COMP

S-CLRVE

PM DET

2

I/O

I

This is an input terminal of FM IF

REG

AM

MIX

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 tunning,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

R OUT

17

L OUT

18

19

20

21

22

23

24

25

26

27 28

29

30

R IN

L 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

Right channel signal output.

O

Left channel signal output.

Input terminal of the Right 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 Left channel

I

post AMP. Mpx Right channel signal output.

O 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

besides the frequency width of the input signal.

I

This is a terminal of AM Local oscillation circuit.

AM Local oscillation Signal output.

O

15

1-48

LA6541-X(IC801) : Servo Driver

1. Pin Layout & Block Diagram

MX-J770V/MX-J880V

Vcc Vref Vin4 Vg4 Vo8 Vo7

24 23

22

21

20

19

11k

Vcc

Gnd

Vo6 Vo5 Vg3 Vin3 Cd Res

18

17 16

ohm

- +

Level shift

B T L driver

Level shift

11k ohm

1

2

Vcc Mute Vin1 Vg1 Vo1 Vo2 Vo3 Vo4 Vg2 Vin2 Reg

3456

Gnd

7 8 9101112

2. Pin functions

Symbol Function

No.

1

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

2 3 4 5 6 7 8 9

Vcc

Mute

Vin1

Vg1

Vo1 Vo2 Vo3 Vo4

Vg2

Vin2

Reg Out

Reg In

Res

Cd

Vin3

Vg3

Vo5 Vo6 Vo7 Vo8

Vg4

Vin4

Vref

Vcc

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

15

14

13

11k ohm

RESET

Regulator

11k ohm

Reg

out

In

1-49

MX-J770V/MX-J880V

LB1641 (IC853) : DC Motor Driver

1. Pin Layout

1 2 3 4 5 6 7 8 9

GNDOUT1 P1

VZ IN1 IN2

2. Pin Functions

Input Output

IN1 IN2 OUT1 OUT2

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

VCC1

10

VCC2 P2

OUT2

Mode

Brake

CLOCKWISE

COUNTER-CLOCKWISE

Brake

1-50

1. Pin layout

1 2 3 4 5 6 7 8 9 10 11

22 21 20 19 18 17 16 15 14 13 12

XT

FM/AM

CE

DI

CLOCK

DO

FM/ST/VCO

AM/FM

SDIN

XT GND LPFOUT LPFIN PD VCC FMIN AMIN

IFCONT IFIN

Pin No.

1 2 3

4

5 6

7

8 9 10 11

Pin No.

12 13 14

15

16 17

18

19 20 21 22

Symbol

XT

FM/AM

CE

DI

CLOCK

DO

FM/ST/VCO

AM/FM

LW

MW

SDIN

Symbol

IFIN

IFCONT

AMIN

FMIN

VCC

PD

LPFIN

LPFOUT

GND

XT

Function X'tal oscillator connect (75kHz) LOW:FM mode When data output/input for 4pin(input) and 6pin(output): H Input for receive the serial data from controller Sync signal input use Data output for Controller Output port "Low": MW mode

Open state after the power on reset Input/output port Input/output port Data input/output

Function IF counter signal input

IF signal output Not use

AM Local OSC signal output

FM Local OSC signal input Power suplly(VDD=4.5-5.5V) When power ON:Reset circuit move PLL charge pump output(H: Local OSC frequency Height than Reference frequency. L: Low Agreement: Height impedance) Input for active lowpassfilter of PLL Output for active lowpassfilter of PLL Connected to GND X'tal oscillator(75KHz)

I/O

I

O

I

O

O I/O I/O I/O

I/O

I

O

-

I

-

O

I

O

I

Reference

Driver

Phase

Detector

Charge Pump

Unlock

Detector

Universal

Counter

Swallow Counter

1/16,1/17 4bit

12bit

Programmable

DriverS

Swallow Counter

1/16,1/17 4bit

Data Shift Register & Latch

Power

on

Reset

C

2B

I/F

1/2

7821113

21

17

6

5

4

3

15

16

22

1

18 19

20

12

2. Block diagram

3. Pin function

LC72136N (IC121) : PLL Frequency Synthesizer

MX-J770V/MX-J880V

1-51

MX-J770V/MX-J880V

MN35511(IC651) : Digital servo & processor

1.Pin layout

28 1

21

40

2.Block diagram

DEMP/TEST2

LRCKI

BCKI

SDATAI

IOSEL

CRC

BLKCK

CLDCK

SBCK

SBCK2

SUBC

DEMPO

CLVS/FLAG6

SQCK SUBQ

AVSS AVDD

PCK/RESY

EFM

PLLF

DSFL

IREF

DRF

AFR MLD

MCLK

MDATA

CK384

VCFO

SMCK/FCLK

XSEL

STAT

41 60

Digital deemphasis

Subcode

DSL PLL VCO

VCO

X2 X1

80

61

buffer

Timing generator

Pich control

8tims Over Sampling

Digital Filter

EFM DEMODULATION

SYNC INTERPOLATION

Micro computer Interphace

A/D converter

SUB CODE DEMODULATION

VCOF2

PLL VCO2

DD Method DAC

16k SRAM

CIRC error Correction Deinterleave

Servo cpu

Input port

PEM R

PEM L

Digital Audio Interface

CLV Servo

Inter polation Soft Muting Digital Attenuation Peak detect aaAuto cue

D/A converter

Output port

Servo Timing generator

AVDD2 OUT2D

OUT2C

OUT1D OUT1C

AVSS2

FLAG IP FLAG

TX

ECM PC

LRCK SRDATA

BCLK DMUTE

VREF TRV

KICK PLAY/TRVSTP

ECS TVD TRD FOD TBAL FBAL /TLOCK /FLOCK

LDON TOFS

WVEL

SENSE

1-52

VSS

VDD

/RST

DVSS1

DVDD1

/TEST

FE

TE

RFENV

S

T

R C R

T

O

E

D

B

V

T E D F

/R

T F

O

3. Pin function

symbol

No.

BCLK

1

2

LRCK SRDATA

3

4

DVDD1

DVSS1

5

TX

6

7

MCLK

MDATA

8

MLD

9

10

SENSE

11

FLOCK

12

TLOCK

13

BLKCK

14

SQCK

15

SUBQ

16

DMUTE

STATUS

17

18

RST

19

SMCK

20

PMCK

21

TRV

22

TVD

23

PC

24

ECM

25

ECS

26

KICK

27

TRD

28

FOD

29

VREF

30

FBAL

31

TBAL FE

32

TE

33

34

RF ENV

35

VDET

36

OFT

37

TRCRS

38

RFDET BDO

39

LDON

40

I/O

O

Bit clock output for SRDATA Identification signal output of Lch and Rch

O O

Serial data output

I

Power supply (Digital)

I

Connected to GND Digital audio interface output

O

com command clock signal input

I

(Data is latched at signal's rising point)

com command data input

I I

com command load signal input

Non connect

-

Non connect

-

Non connect Non connect

I

Outside clock for sub-code Q resister input Sub-code Q -code output

O

I

Connected to GND Status signal

O

(CRC,CUE,CLVS,TTSTOP,ECLV,SQOK) Reset signal input (L:Reset)

I

Non connect

I

Non connect

O

Traverse enforced output

O

Traverse drive output

I

Non connect

Spindle motor drive signal (Enforced

O

mode output) 3-State Spindle motor drive signal (Servo error

O

signal output)

Kick pulse output

O

Tracking drive output

O O

Focus drive output

Reference voltage input pin for D/A

I

output block (TVD,FOD,FBA,TBAL) Focus Balance adjust signal output

O O

Tracking Balance adjust signal output

Focus error signal input(Analog input)

I

Tracking error signal input(Analog input)

I I

RF envelope signal input(Analog input)

Vibration detect signal input(H:detect)

I

Off track signal input(H:off track)

I

Track cross signal input

I

RF detect signal input(L:detect)

I

BDO input pin(L:detect)

I

Laser ON signal output(H:on)

O

Description

Pin No.

41 42 43 44 45 46

47

48 49 50 51

52 53 54 55 56

57

58 59 60 61 62

63 64

65 66

67

68

69

70 71 72

73

74

75 76

77

78 79

80

symbol

TES PLAY

WVEL ARF IREF DRF

DSLF

PLLF VCOF AVDD2

AVSS2

EFM

PCK PDO

SUBC XSEL

VSS

XI

X2

VDD VCOF2

AVSS1

OUT1C

OUT1D

OUT2D

OUT2C

AVDD1

DEMPO

CK384

IOSEL

TEST

SBCK2 SUBC

SBCK CLDCK

IPFLAG DEMPI

SDATI

LRCKI

BCKI

MX-J770V/MX-J880V

I/O

Non connect

II

Non connect

I

Non connect

I

RF signal input Reference current input pin

I

Bias pin for DSL

I

I/O

Loop filter pin for DSL

Loop filter pin for PLL

I/O

I

Not used

I

Power supply(Analog) Connected to GND(Analog)

Non connect

III

Non connect

I

Non connect

I

Non connect

Clock input for subcode/serial output

I

Connected to GND(for X'tal oscillation

I

circuit)

Input of 16.9344MHz X'tal oscillation circuit

I

Output of X'tal oscillation circuit

O

I

Power supply(for X'tal cscillation circuit) PLL loop filter terminal for jitter absorption

O O

Ground terminal for audio DAC

O

PEM output terminal 1C

PEM output terminal 1D

O

PEM output terminal 2D

PEM output terminal 2C

O

Power supply for audio DAC

O

Non connect

384fs clock output

O

I

Mode switch terminal

I

Test mode setting terminal

I

Sub code/data reading clock input

O

Sub code/serial output Clock input for sub code/serial output

I

O

Sub code /frame clock signal output terminal Interpolation flag signal output H:Interpolation

I

IOSEL:L The outside DEMPO input terminal

I

SRDATA input terminal

I

When IOSEL is "L", LRCK input H:Lch data

I

L:Rch data When IOSEL is "L", BCK input

I

Description

1-53

MX-J770V/MX-J880V

MN4SV17160BT-10(IC104):16MB SDRAM

1.Block diagram

DQ0

DQ15

Column decoder

Sense amplifier

Bank 0

Memory cell array

2048 Row x 256

Column x 16 bit

Column decoder

~

DQ buffer

LDQM

UDQM

Sense amplifier

Bank 1

Memory cell array

2048 Row x 256

Column x 16 bit

Row decoder Row decoder

Column

address

counter

Column address

buffer

Row

address

buffer

Refresh

counter

generator

Control signal

Mode

register

Clock

CLK

buffer

CKE

CS RAS CAS

WE

Command decoderAddress buffer

A11

A10

A9

~

A0

2.Pin function

Pin No. Symbol Description Pin No. Symbol Description

1

2,3

4

5,6

7

8,9

10

11,12

13 14 15 16 17 18

19,20

21~24

25

VCC

DQ0,1

VSS

DQ2,3

VDD

DQ4,5

VSS

DQ6,7

VCC

LDQM

WE CAS RAS

CS

A11,10

A0~3

VCC

Power supply Data input/output Connect to GND Data input/output Power supply Data input/output Connect to GND Data input/output Power supply Lower DQ mask enable Write enable Column address strobe Row address strobe Chip enable Address inputs Address inputs Power supply

26

27~32

33 34 35 36 37 38

39,40

41

42,43

44

45,46

47

48,49

50

VSS

A4~9

NC

CKE

CLK

UDQM

NC

VCC

DQ8,9

VSS

DQ10,11

VDD

DQ12,13

VSS

DQ14,15

VSS

Connect to GND Address inputs Non connect Clock enable System clock input Upper DQ mask enable Non connect Power supply Data input/output Connect to GND Data input/output Power supply Data input/output Connect to GND Data input/output Connect to GND

1-54

NJM4580E-W(IC652) : OP amp

1. Terminal layout

MX-J770V/MX-J880V

A OUT

2. Block diagram

V

A IN

V

1

2

8

7

V

B OUT

A B

3

4

6

B IN

5

B IN

INPUT

OUTPUT

V

1-55

MX-J770V/MX-J880V

NJM4580L (IC901) : Mic Amplifier

1

2

34

5

TA8409S(IC851,IC852):Motor driver

1.Pin layout 2.Pin function

1

IN2

VCC

OUT 2

GND GND

VS

OUT 1

VR

IN1

2 3 4 5 6 7 8 9

TA8409S

INPUT OUTPUT MODE

IN1

0 1 0 1

IN2

0 0 1 1

6

OUT1

1. A OUTPUT

2. A-INPUT

3. A+INPUT

-

4. V

5. B+INPUT

6. B-INPUT

7

8

7. B OUTPUT

8. V+

OUT2

H

L L

L H L

MOTOR

STOP CW/CCW CCW/CW

BRAKE

TC74VHC00FT-X(IC106) : Wright timing control

1.Terminal layout / Block diagram Vcc 4B 4A 4Y 3B 3A 3Y

14 13

1

1A 1B 1Y 2A 2B 2Y GND

1-56

12

11 10 9 8

2

6

543

7

TDA7439 (IC436) : Conrtol 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

CSL

29

DIG GND

28

TREBLE(R)

27

TREBLE(L)

26

MIN(L)

25

MOUT(L)

24

BOUT(L)

23

BIN(L)

22

BOUT(R)

21

BIN(R)

20

MOUT(R)

19

MIN(R)

18

INR

17

MUXOUTR

16

INL

MX-J770V/MX-J880V

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 ATT LEFT

SPEAKER ATT RIGHT

SUPPLY

2

4

30

1

29

5

3

4

AGND

SCL

SDA DIG-GND

ROUT

Vs

AGND

INR

CREF

MUXOUT

TREBLE(R)

MIN(R)

BIN(R)

MOUT(R)

BOUT(R)

1-57

MX-J770V/MX-J880V

CL8830-PE0 (IC101) : MPEG Decoder & DSP

1. Pin layout

208 157

1

52

53 104

2. Block diagram

156

105

1-58

3.Pin function(1/2)

Pin No

Symbol and I/O

Description

System Services

Power and Ground

13

178

190,174,156,153,147,141,138,

133,129,52,1

I

I/O

Hardware reset. An external device asserts RESET (active LOW) to execute a decoder hardware reset. To ensure proper initialization after power is stable, assert RESET for at least 20 s. System clock. Decoder requires an external 27 MHz TTL oscillator. Drive with the same 27-MHz as VCK. Programmable I/O pins.

176

179

5,12,17,27,36,40,47,55,61,65,

69,75,81,87,91,95,101,107,113,

117,123,134,144,149,160,168,

175,181,193,197

7,14,19,29,38,42,49,57,63,67,

71,77,83,89,93,97,103,109,115,

119,125,136,146,151,162,170,

183,195,199

Analog

Power

Analog Ground

Power

Ground

3.3-V analog supply voltage.

Analog ground for PLL.

3.3-V supply voltage for core logic and I/O signals.

Ground for core logic and I/O signals.

206

204-202

11-8,6,4-2

16

208 207

15

I

I/O

O,OD,PU

I I

O,OD,PU

Host chip select. Host asserts CS to select the decoder for a read or write operation. The falling edge of this signal triggers the read or write operation. Host address bus. 3-bit address bus selects one of eight host interface registers. 8-bit bi-directional host data bus. Host writes data to the decoder Code FIFO via HDATA[7:0]. MSB of the 32-bit word is written first. The host also reads and writes the decoder internal registers and local SDRAM/ROM via HDAT[7:0]. Host interrupt. Open drain signal, must be pulled-up to 3.3 volts. Driven high for 10 ns before tristate. Read strobe in I mode. Must be held HIGH in M Mode. Read/write strobe in M mode. Write strobe in I mode. Host asserts R/W LOW to select write and LOW to select Read. Active LOW to indicate host initiated transfer is not complete. WAIT is asserted after the falling edge of CS and reasserted when decoder is ready to complete transfer cycle. Open drain signal, must be pulled-up to 3.3 volts. Driven high for 10 ns before tristate.

8-bit Host Interface

185

184 182

180

I

I I

I

Asserted HIGH indicates a corrupted byte. Decoder keeps the previouse valid picture on-screen until the next valid picture is decoded. CD bit clock. Decoder accept multiple BCK rates. Programmable polarity 16-bit word synchronization to the decoder (right channel HIGH). Serial CD data.

CD interface

Name

RESET

SYSCLK

PIO[10:0]

A- VDD

A- VSS VDD

VSS

CS

HADDR[2:0]

HDAT[7:0]

INT

RD R/W

WAIT

CD-C2PO

CD-BCK CD-LRCK

CD-DATA

MX-J770V/MX-J880V

1-59

MX-J770V/MX-J880V

3.Pin function(2/2)

Pin No

157

177

155,154,152,150,148,145,143,

142

158

92 94 79

127,126,124,122-120,118,116, 114,112-110,108,106-104,102,

100-98,96

78,76,74-72,70,68,66,64,62,60-

58,56,54,53

82

128

85 84

88,90

86 80

167

161 166

169

173 171

172

1.I-input, O-output, OD-open drain, PU-requires external 4.7-k pull-up resistor.

Name

HSYNC

VCLK

VDATA[7:0]

VSYNC

EDO-CAS EDO-RAS LDQM MADDR[20:0]

MDATA[15:0]

MWE

ROM-CS SD-CAS SD-CLK SD-CS[1:0] SD-RAS UDQM

DA-BCK

DA-DATA DA-LRCK

DA-XCK

DAI-BCK DAI-DATA

DAI-LRCK

Symbol and I/O

Video Output

I/O

I

O

I/O

SDRAM/EDO/ROM interface

O O O O

I/O

O

O,OD,PU

O O O O O

Audio interface

O

O O

I/O

I I

I

Horizontal sync. The decoder begins outputting pixel data for a new horizontal line after the falling (active) edge of HSYNC. Video clock. Clocks out data on input. VDATA[7:0]. Clock is typically 27 MHz. Video data bus. Byte serial CbYCrY data synchronous with VCLK. At power-up, the decoder does not drive VDATA. During boot-up, the decoder uses configuration parameters to drive or 3-state VDATA. Vertical sync. Bi-directional, the decoder outputs the top border of a new field on the first HSYNC after the falling edge of VSYNC. VSYNC can accept vertical synchronization or top/bottom field notification from an external source. (VSYNC HIGH = bottom field. VSYNC LOW = Top field)

Active LOW EDO DRAM column address strobe. Active LOW EDO DRAM Row address strobe. SDRAM LDQM. Memory address.

Memory data.

SDRAM/EDO write enable. Decoder asserts active LOW to request a write operation to the SDRAM array. ROM chip select. Open drain signal, must be pulled-up to 3.3 volts. Active LOW SDRAM column address. SDRAM system clock. Active LOW SDRAM bank select. Active LOW SDRAM row address. SDRAM UDQM.

PCM bit clock. Divided by 8 from DA-XCK, DA-BCK can be either 48 or 32 times the sampling clock. Serial audio samples relative to DA-BCK clock. PCM left-right clock. Identifies the channel for each audio sample. The polarity is programmable. Audio external frequency clock. Used to generate DA-BCK and DALRCK. DA-XCK can be either 384 or 256 times the sampling frequency. PCM input bit clock. PCM input data, two channels. Serial audio samples relative to DABCK clock, resulting in downmixed audio output. PCM input left-right clock.

Description

1-60

GP1U281X (IC915) : Receiver for remote controller

HD74HCT244FP-XE (IC181) : Buffer

1. Terminal layout

2. Block diagram

VSS

VDD

+ –

Amp.

Limiter Integrator Comparator

B.P.F

Demodulator

GND

MX-J770V/MX-J880V

VCC Vout

1-61

MX-J770V/MX-J880V

MN101CP35DEB (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

MSTAT

KCLK

DATAOUT

DATAIN

CK

BEAT

VDD

OSC2,1

VSS

XI,XO MMOD VREF-

KEY1~4 SLCKEY1 SLCKEY2 SLCKEY3

SPI

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

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

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 sibnal output to IC436 LED Control signal output (BASS)

1-62

Pin function (2/2)

MX-J770V/MX-J880V

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

1-63

MX-J770V/MX-J880V

TC74VHC74FT-X (IC107) : Flip-Flop

Pin layout & Block diagram

1CLR 1 1D 2 1CK 3 1PR 4 1Q 5 1Q 6 GND

CKQD

Q

CKQD

Q

(TOP VIEW)

14 13 12 11 10 9 8

V

CC

2CLR 2D 2CK 2PR 2Q 2Q7

UPD6461GS-635-X (IC151) : 16MB SDRAM

1.Pin layout

CLK

CS

DATA

PCL

VDD

CKOUT

OSCOUT

OSCIN

TEST

VSS

1 2 3 4 5 6 7 8 9

10

20 19 18 17 16 15 14 13 12 11

HSYNC VSYNC VB VG VR VBLK VC2 BLK2 VC1 BLK1

2.Pin function

Pin No. Symbol Description Pin No. Symbol Description

1 2 3 4 5 6 7 8

9 10 11

CLK

CS

DATA

PCL VDD

CKOUT

OSCOUT

OSCIN

TEST

VSS

BLK1

Clock signal input Chip select input Serial data input Power ON clear Power supply Non connect Non connect Oscillation terminal (output) Connect to GND Connect to GND Non connect

12 13 14 15 16 17 18 19

20

VC1

BLK2

VC2

VBLK

VR VG VB

VSYNC

HSYNC

Non connect Non connect Non connect Blanking signal output Character signal output Character signal output Character signal output Vertical synchronizing signal input Horizontal synchronizing signal input

1-64

1

2 3 4 5

6 7 8

9 10 11 12

13~16

17 18 19 20 21 22 23 24 25

26~33

34

35~41

42 43

44~47 48~53

54

55~57

58 59 60 61 62 63 64

65 66 67 68

69

70 71 72 73 74 75 76

77 78

79,80

81 82 83

84~91

92

93~100

DVDWAIT

OE

WE

ROMCS

RAMCS

DVDCS

BREQ

DVDRST

WORD

HA0~3

VDD

SYSCLK

VSS

XI

XO

VDD

OSCI

OSCO

MODE

HA4~11

VDD

HA12~18

HA19

VSS

HA20~23

VDD

ENCRST

PAL60

N/PAL

VSS

VCDEMP

HREQ

HRDY

VDD

SRCLK

M2HDAT

H2MDAT

SBT1

SBI1

SBO1

MREQ

DVDINT

ADSEP RESET

VDD

VSS

HD0~7

Wait signal input from IC106 Read Enable input Non connect Write enable signal output Chip select signal output (ROM) Non connect Non connect Chip select signal output (AV decoder) Power supply Reset signal output to IC101 Non connect Connect to ground Host address bus terminal Power supply Non connect Connect to ground Connect to ground Non connect Power supply Oscillation terminal(1MHz) Oscillation terminal(1MHz) Connect to ground Host address bus terminal Power supply Host address bus terminal Non connect Connect to ground Non connect Non connect Power supply

Non connect Reset signal output to IC152 Normal PAL60 at PAL mode Select NTSC/PAL mode Connect to ground Non connect Non connect Request signal output to IC251 Ready signal output to IC251 Power supply Data clock input Mecha to host micom data port Host to mecha micom data port Power supply Connect to ground Non connect Pull up Pull up Power supply Request signal input from IC251 Non connect

Interrupt from AV decoder

Non connect Power supply Reset signal input Power supply Non connect Connect to ground Host data bus terminal

I

O O

-

O

-

O

-

I

O

-

O O O

-

O

-

I I

O

-

I

-

I

-

I

-

I/O

Pin No. Symbol I/O Description Pin No. Symbol I/O Description

MN102L490A (IC103) : VCD Host micom

1

25

75

51

26 ~ 50

100 ~ 76

~

1.Pin layout

2.Pin function

MX-J770V/MX-J880V

1-65

MX-J770V MX-J880V

VICTOR COMPANY OF JAPAN, LIMITED

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

(No.20861)

Printed in Japan 200007(V)