JVC MX-K10 Service Manual

SERVICE MANUAL

COMPACT COMPONENT SYSTEM

MX-K10

BASS-REFLEX BASS-REFLEX

COMPACT COMPONENT SYSTEM

STANDBY/ON

STANDBY

FM

AUX

/ AM

PHONES

REC START / STOPCD REC START

MIC

MIC LEVEL

COMP U P L AY CONT R O L

MIN MAX

EJEC T EJEC T

PLAY

A

CD1CD2CD

REPEAT

SOUND MODE

ACTIVE

BASS EX.

STANDBY/ON

SLEEP

AUX

FM MODE

FM /AM

3

CD

PROGRAM /RANDOM

TAPE

A/B

VOLUME

KARAOKE

FADE

MUTING

ECHO

CA-MXK10SP-MXK10 SP-MXK10

Contents

Safety precautions --------------------------- 1- 2 Important for laser products ---------------- 1- 3 Preventing static electricity -----------------1- 4 Disassembly method ------------------------1- 5 Adjustment method --------------------------- 1-18

MX-K10

CANCEL

/ DEMO

CD

TAPE

DUBBING

FUL L - L OG I C CO N T R O L

3-CD

PLAY & EXCHANGE

CD-R/RW PLAYBACK

SOUND

P

K

O

C

MODE

REPEAT

P

O

1 BIT

DUAL D/A

R

CONVERTER

PROGRAM

C

L

A

C

I

S

E

M

U

L

O

V

PANDOM

SET

PRESET

TUNING

CLOCK

TAPE

/TIMER

A / B

CD S Y N C H R O R E C O R D IN G

P

I K S

C S I D

3

D C

ACTIVE

2

D

C

BASS EX.

1

D

C

REC / P L AY

B

Area Suffix

UT ........................ TAIWAN

Flow of functional operation until TOC read -------------- 1- 20 Maintenance of laser pickup -------------- 1- 21 Replacement of laser pickup -------------- 1- 21 Description of major ICs ------------------- 1- 22

No. 21173

May. 2003

MX-K10

Safety Precautions

1. This design of this product contains special hardware and many circuits and components specially or 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 currnet check (Electrical shock hazard testing)

After re-assembling the product, always perform an isolation check on the exposed metal parts of the

product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock. Do not use a line isolation transformer during this check.

l

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.)

l

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 ACtype capacitor between an exposed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and meausre the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured Any must not exceed 0.75 V AC(r.m.s.). This corresponds to 0.5 mA AC(r.m.s.).

0.15 F AC TYPE

1500 10W

AC VOLTMETER (Having 1000 ohms/v or more sensitivity)

olts,

Place this probe on each exposed metal part.

Good earth ground

!

CAUTION

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.

Bur rs f orm ed d uri ng m old ing may be left ove r on some parts of the chassis. There fore, pay at tention to such bur rs in the case of pr ef orming repai r 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 and C version)

1-2

Important for laser products

MX-K10

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 safe ty int erlocks hav e fail ed 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.

REPRODUCTION AND POSITION OF LABELS

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 us e enough caution no t

to see the beam directly or touch i t in case of a n ad j u s tment or operation check.

ADV ARS E L : Usy nlig laserstr åli ng v ed å bni ng, nå r

sikkerhedsafbrydere er ude af funktion. Undgå udsættelse for stråling.

ADV ARS E L : Usy nlig laserstr åli ng v ed å pni ng, nå r

sik ker hets bry teren e r avs lot t. U nngå utsettelse for stråling.

WARNING LABEL

1-3

MX-K10

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 testers internal power source can easily destroy the laser diode.

4. Handling the CD changer unit (optical pickup)

1. Do not subject the CD changer 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 CD changer 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

CD changer

unit

CD changer

mechanism

assembly

subjected to strong force.

4. It is no t possible to adju st the semi-fix ed 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 changer mechanism.

1. Remove the CD changer unit.

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

3. Solder is put up before the card wire is removed from connector Cn601on the main board as shown in Fig.1 and Fig. 2. (When the wire is removed without putting up solder, the CD pick-up assembly might destroy.)

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

Flexible cable

Soldering

Fig.2

Fig.1

1-4

MX-K10

Disassembly method

Commence disassembly of this set by removing the main units and then proceed to the components and assemblies inside the units.

Replacement of the fuses and the power IC

n Top cover

n CD changer unit

n Front panel assembly

n Chassis unit

n CD changer unit

n Removing the main PCB n Removing the CD changer mechanism assembly n Removing the CD pickup n Replacing the loading motor and belt of the CD changer tray n Replacing the CD tray rotor belt of CD changer, and removing the motor

n Front panel assembly

n Removing the cassette deck mechanism n Removing the earphone jack PCB n Removing the control/FL PCB n Removing the switch PCB and ACTIVE BASS EX. switch PCB n Removing the cassette deck main motor, and replacing the main belts n Removing the leaf switches of the cassette deck mechanism n Removing the cassette deck heads

n Chassis unit

n Removing the 3-pin regulator n Removing the power amp and supply PCB and the Power Trans PCB n Removing the sub power PCB

1-5

MX-K10

Replacement of the fuses and the power IC

n

Replacing the fuses (See Fig.1)

n

Prior to performing the following procedure, remove

the left side BOARD.

1. Replace the fuses inside.

[Caution] Be sure to use fuses with the specified

ratings.

n Replacing the power IC (See Fig.2)

n

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

1. Remove the two screws "A" from the heat sinkbetween the power IC.

2. Remove the solder fixing the power IC.

Fuse(F953) T1AL 250V

Bottom side Fig.1(A)

Hole

Hole For Check Fuse Condition

Component side Fig.1(B)

CAUTION

(don't remove the safety sheet cover)

Fuse(F951) T1.6AL 250V

W A

Fuse(F952) T1.6AL 250V

FW951

Fig.2

1-6

Fuse(F952) T1.6AL 250V

Fuse(F951) T1.6AL 250V

Fuse(F953) T1AL 250V

n Removing the top cover and two sides

BOARD (See Fig.3 and 5)

1. Remove the six screws "C" that retain the top cover

from the rear of the body.

2. Remove the eight screws "C" and "D" that retain

the top from the two sides of the body.

3. Remove the top cover from the body by lifting it toward the rear.

MX-K10

Top cover

C

B

Fig.3

Front panel assembly

C

Front panel assembly

Fig.4

D

Fig.5

1-7

MX-K10

n Removing the CD changer unit

(See Fig.6 to 9)

n

Prior to performing the following procedures, remove

the top cover and both sides BOARD.

[Caution] Although the CD mechanism unit can be

removed without removing the CD tray panel, it is still recommended to remove it in order to prevent damage.

a.From the front panel side of this set, push in the

sections marked with arrows and pull out the CD tray toward the front.

b.Remove the CD tray panel by pushing both of its

extremities upward in the direction of the arrows.

c.Push the CD tray deep into the set.

CD tray panel

1.Disconnect the card wires from the CD PCB CN703 and CN203.

2.From the rear of the set, remove the two screws "E" and two serews "G" on the front panel left and right side.

3.Handle the CD changer unit rear, take out unit.

CD tray panel

Accessory terminal

Fig.7

E

F

Antenna termianl

F

Fig.8

1-8

Fig.6

CD changer unit

G

Fig.9

n Removing the front panel assembly

(See Fig.10 to 11)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

1.Disconnect the parallel wire and card wire from the connectors CN702, CN701, CN101 on the power amp and supply PCB.

2. Remove the two screws "H" retaining the front panel assembly onto the bottom of the body.

3. Remove the screw "I" retaining the cassette deck mechanism and then remove then GND lug "b" that comes from the power amp and supply PCB.

4. Disengage the claws "c" on both sides at the bottom of the front panel assembly and then remove the assembly.

MX-K10

Claw c

H

Fig.10

er amp andPow

supply PCB

GND lug b

I

Fig.11

1-9

MX-K10

n Removing the CD PCB

(See Fig.12 to 13)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

1. Disconnect the wires from CN603A, CN603B and CN604 on the CD PCB, which is located on the back side of the CD changer unit.

2. The two screws "J" that retain the CD PCB should be removed.

3. Remove the CD PCB by pulling it toward the side where the CN601 is located.

4.Using solder, short the CD pickup to connect to short round.

CD PCB

J

[Caution] After re-connecting the wires, be sure to

remove the shorting solder from the GND connection.

5. Disconnect the card wire from the connector CN601 on the main PCB and then remove the main PCB.

Fig.12

CD PCB

CN601

1-10

Short round

Fig.13

n Removing the CD changer mechanism

assembly (See Fig.14 to 16)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

1.Remove the screws "d" from the front chuch base of the CD changer mechanism unit.

2. Turn the CD changer mechanism cover base and remove the screws "e" connecting the unit to the CD changer mechanism assembly.

3. Removing the four screws "k" retaining the CD mechanism holder assembly.

[Caution] When replacing the CD changer mechanism

assembly, be sure not to mistake the positions of the silver color and copper color spring.

MX-K10

d

Fig.14

CD changer unit

CD changer mechanism assemb

ly

K ( Silver color) K ( copper color)

K ( Silver color)

Fig.16

K ( copper color)

e

Fig.15

1-11

MX-K10

n Removing the CD pickup (See Fig.17)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

n

Also remove the CD changer mechanism.

1. Widen the section "f".

2.While keeping the section "f" wide open, push the section "g" in the direction of the arrow to remove the shaft, and then remove the CD pickup.

n Replacing the loading motor and rotor

belt of the CD changer (See Fig .18)

n

Prior to performing the following procedures, remove

the top cover.

n

Also open the CD changer tray.

1.Remove the two scr ews "L" retain ing the C D changer tray loading motor.

2.Remove the two screws "M" retaining the gear plate and take it out, after remove the rotor belt from the pulley.

n Replacing the CD turn table and remov-

ing the motor (See Fig. 19 and 20)

CD pickup

f

Shaft

Fig.17

M

g

n

Prior to performing the following procedures, remove

the top cover.

n

Also remove the CD changer unit.

1.Remove the one screws "N" retaining the CD (Turn table).

2.Remove the two screws "O" retaining the stopper brackets on both sides of the CD changer unit.

3.Remove the stopper brackets from both sides of the CD changer unit.

4.Pull out the CD tray from the CD changer unit, all the way and lift the tray (u/~ ward) to remove.

5.Remove the gear and after push out the tray motor locker and pull out the tray motor from the CD tray.

Turn table motor

, and then remove the CD tray

.

Motor locker

L

Fig.18

N O

d

1-12

Fig.20

Obligue gear

Fig.19

MX-K10

n Removing the cassette deck mechanism

(See Fig.21)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

n

Also remove the front panel assembly.

1. Remove the five screws "Z" retaining the cassette deck mechanism.

n Removing the earphone jack PCB

And Mic Jack PCB (See Fig.22)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

n

Also remove the front panel assembly.

1.Re move the s crew wi th the washer, "P" that re tains the e arpho ne jack PCB.

Front panel assembly

Z

Fig.21

Front panel assembly

MIC Jack PCB

n Removing the control/FL PCB

(See Fig.23)

n

Prior to performing the following procedures, remove

the top cover and both sides board. Also remove the CD changer unit.

n

Also remove the CD changer unit.

n

Also remove the CD changer unit.

1.Remove the four screws "Q" that retain the control/FL PCB from the back of the front panel unit.

Fig.22

Front panel assembly

Q

Control/FL

PCB

Fig.23

1-13

MX-K10

n Removing the switch PCB and sound

mode and CD function switch PCB

(See Fig.23 to 26)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

n

Also remove the front panel assembly.

1.Pull out the volume control knob and MIC Volume Knob from the front of the front panel assembly.

2. Remove the four screws "Q" retaining the front panel assembly.

3.Remove the control/FL PCB.

4.Remove the eleven screws "R" retaining the switch (key 1) PCB.

5.Remove the three screws "S" retaining the sound mode (key 2) switch PCB.

6.Remove two screws "T" retaining the CD function (key 3) switch PCB.

Front panel assembly

MIC Volume Knob

Volume knob

Fig.24

Front panel assembly

Volume shaft

Fig.25

Key 2 PCB

S

R

T

Key 3 PCB

1-14

Key 1

R

PCB

Fig.26

MX-K10

n Removing the cassette deck main motor,

and replacing the main belts

(See Fig.21, 27 and 28)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

n

Also remove the front panel assembly.

1. Remove the five screws "z" retaining the cassette deck mechanism.

2.Remove the cassette deck mechanism.

3.Remove the two screws "t" retaining the main motor from the front side of the cassette deck.

[Caution] After attaching the main motor, check the

orientation of the motor and the polarity of the wires.

4. From the backside of the cassette deck, remove the main motor and two main belts.

[Caution] The lengths of the cassette A(playback

only) and cassette B(record/play) main belts are different. When attaching the main belts, use the longer belt for cassette A.

Cassette deck mechanism (Front side)

Fig.27

Cassette deck mechanism (Back side)

Main belt (For B cassette)

t

Cassette deck main motor

Main belt (For A cassette)

n Removing the leaf switches of the cassette

deck mechanism (See Fig. 21 and 29)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

n

Also remove the front panel assembly.

1.Remove the five screws "O" that retain the cassette

deck mechanism.

2.Remove the cassette deck mechanism.

3.Turn the cassette deck mechanism upside down.

4.Remove the solder from around the leaf switches.

5.Pull out the leaf switches from the front side of the

cassette deck mechanism.

Fig.28

Solder side of leaf switch

Cassette deck mechanism (Back side)

Fig.29

1-15

MX-K10

n Removing the cassette deck heads

(See Fig. 21 and 30)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

n

Also remove the CD changer unit.

n

Also remove the front panel assembly.

1.Remove the five screws "O" that retain the cassette deck mechanism.

2.Remove the cassette deck mechanism and place it so that the front side faces up.

3.Remove the solder from the bottom side of the head terminal and disconnect the wire.

4.Remove the screw "U" that retains the head.

5.Remove the screw "V" that retains the head.

6. Hold the head and slide it in the direction of the arrow to remove it.

Cassette deck mechanism (Front side)

PB Head REC/PB Head

VU

Fig.30

VU

n Removing the 3-pin regulator transistor

(See Q904, Q907 and 31)

n

Prior to performing the following procedures, remove

the top cover and both sides board.

1. Remove the screw "W" that retains the heat sink the 3-pin terminal regulator Q904, Q907.

2.Remove the solder fixing the 3-pin regulator transistor.

AW

Fig.31

1-16

n Removing the power amp and supply PCB

and the power trans PCB and tuner PCB

(See Fig. 32 to 34)

n

Prior to performing the following procedures, remove

the top cover and both sides board and remove CD changer unit.

1.Remove the three screws "BB" that retains the

rear panel.

2.Disconnect CN202A the wire, pull out the tuner PCB.

3.Remove the three screws "AA" form the chassis

back panel between the heat sink.

4.Remove the three screws "X" that retain the speaker

terminals and AUX terminal.

5.Remove the screw "YY" that retains the rear panel,

and AC switch screw then remove the rear panel.

6. Disconnect the parallel wires from the connectors

FW951 on the power trans PCB.

7.Remove the screws "Z" that retain the power amp

and supply PCB and then remove the assembly.

8.Remove the clamp of AC power cord from the chassis.

9.Remove the four screws "AB" that retain the power

trans PCB and then remove the assembly.

MX-K10

X

BB

YY

CLAMP

Fig.32 (A)

Power amp and supply PCB

Chassis

AA

Rear panel

Fig.32 (B)

Z

Fig.33

AB

Fig.34

1-17

MX-K10

Adjustment method

Measurement instruments required for adjustment

1.Low frequency oscillator. This oscillator should have a capacity to output

0dB 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

VT712 : For Tape speed and wow flutter ( 3kHz) VT703 : For Head angle(10kHz), play back frequency characteristics(1kHz), and dubbing frequency characteristics (63,1,10kHz)

7.Blank tape

TAPE I : 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

Measurement conditions

(Select correct AC Line Volt.)

Power supply voltage AC 110V/127V/220V/230V-240V (50/60Hz)

Measurement output terminal : Speaker out

: TP101(Measuring for TUNER/

DECK/CD)

: Dummy load 6ohm

Radio input signal

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

Frequency Range

AM 531kHz~1710kHz / 530kHz~1710kHz 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.

1-18

n Arrangement of adjusting positions

Cassette deck mechanism (Front side)

MX-K10

PB Head (Deck-A)

Head azimuth screw

(Forward side)

Head azimuth screw

(Reverse side)

Head azimuth screw

n Tape recorder section

Items

Cassette Head Azimuth Alignments

Measurement

conditions

Test tape : VT703 (10kHz) Measurement output terminal : Left and Right speaker output (6-ohm loaded) or Headphone Output (32-ohm loaded)

REC/PB Head (Deck-B)

(Forward side)

Head azimuth screw

(Reverse side)

Measurement method

1. Playback the test tape VT703 (10KHz) or equivalent.

2. Adjust the head azimuth screw to obtain maximum output and both output of L / R is in 3dB.

3. Put on the screw lock paint after alignments.

Standard

values

Maximum output

Adjusting

positions

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

Recording Bias Frequency Alignment

Test tape : TYPE I AC-225 Measurement output terminal

1. Insert the recording tape in deck-B.

2. Starting the recording.

3. Adjust the oscillation frequency to 80KHz+/-3KHz by core of Oscillation coil of L301.

: Erase head terminal (CN308 8-Pin)

n Tuner section

Items

AM Tracking Alignments

Measurement

conditions

Input signal : 530kHz (531kHz)

Adjustment point : Antenna coil (L2)

1. Set the Signal Generator signal to 530kHz (531kHz)

the feed to Loop Antenna.

2. Receiving the signal and the adjust the OSC coil (L2) obtain the V.T is 1.40V +/-0.05V.

3. Change the receiving frequency to 600KHz (603KHz).

4. Adjust the Antenna coil ( L2 ) obtain maximum sensitivity. (Adjust the SSG output to out of AGC range.)

AM IFT Alignments

Input signal : 530kHz (531kHz) Adjustment point : IFT (T1)

1. Set the receiving frequency to 530kHz (531kHz).  

2. Feed the 450KHz signal to AM antenna input.

3.Adjust the IFT Block T1 obtain to maximum output. (Adjust the SSG output to out of AGC range.)

Note: The adjustment of CD section is not required.

Measurement method

80kHz+/-3kHz

Standard

values

V. T : 1.40V+/-0.05V

Maximum sensitivity

Maximum output

Use the HighImpedance Probe or Frequency counter input.

Adjusting

positions

Adjust the OSC coil only when the AM coil block has been changed.

Adjust the IFT only when the IFT block has been changed.

1-19

MX-K10

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 CN602 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 20 of IC611(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 IC601 is + 5V?

Confirm that the Focus error S-cuve signal at the pin32 of IC601 is approx.2Vp-p

Confirm that the signal from pin24 IC601 is 0V as a accelerated pulse during approx.400ms.

Confirm the waveform of the Tracking error signal. at the pin 20 of IC611 (R643) (See fig-1)

1-20

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 TP3

MX-K10

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?

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.

YES

Check the eye-pattern at TP3.

O.K

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 would be adjusted when the pickup operates normally, the laser pickup may be damaged due to excessive current.

1-21

MX-K10

Description of major ICs

n AN22000A (IC611) : CD-DA Head Amp.

1. Terminal layout

2. Pin function

1 3 2

16 17

3. Block diagram

RFOUT

RF_EQ

624754 8

RFIN

AGC

No.

Symbol

I/O

Function

1 PD I APC Amp. input terminal 2 LD O APC Amp. output terminal 3 VCC - Power supply terminal 4 RFN I RF adder Amp. inverting input

terminal 5 RFOUT O RF adder Amp. output terminal 6 RFIN I AGC input terminal 7 CAGC I Input terminal for AGC loop

filter capacitor 8 ARF O AGC output terminal 9 CBA I Capacitor connecting terminal

for HPF-Amp.

10 3TOUT O 3 TENV output terminal 11 CBOO I Capacitor connecting terminal

for envelope detection on the

darkness side

12 BDO O BDO output terminal 13 COFTR I Capacitor connecting terminal

for envelope detection on the

light side

14 OFTR O OFTR output terminal

11 12

BDO

13 14

OFTR

9

No.

Symbol

I/O

Function

15 NRFDET O NRFDET output terminal 16 GND - Ground 17 VREF O VREF output terminal 18 VDET O VDET output terminal 19 TEBPF I VDET output terminal 20 TEOUT O TE Amp. output terminal 21 TEN I TE Amp. inverting input

terminal

22 FEN I FE Amp. inverting input

terminal 23 FEOUT O FE Amp. output terminal 24 GCTL O GCTL & APC terminal 25 FBAL O FBAL control terminal 26 TBAL O TBAL control terminal 27 E I Tracking signal input terminal 1 28 F I Tracking signal input terminal 2 29 D I Focus signal input terminal 4 30 B I Focus signal input terminal 3 31 C I Focus signal input terminal 2 32 A I Focus signal input terminal 1

32

31

30

29

27

28

NRFDET

AMP

AMP17GCA BCA

+

-

GCA BCA

SUBT

3TENV

-

+

-

+

VDET

-

+

10

15

22

23

21

20

19

18

2

LD

1-22

PD

1

GCTL

TBAL

26

FBAL

25 16 3

n

BA15218DIP (IC102) : Dual low noise operational amp.

1. Terminal layout

MX-K10

OUT1

- IN1

+-

+IN1

VEE

n

BA5936S (IC621) : 6 channel BTL driver

Vcc

OUT2

- IN2

-+

+IN2

1. Block diagram

32

31

30

29

x2

D

x3/828x3/8

LEVEL SHIFT

D

D DDDD

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

27 26 25 24 23 22 21

MUTE

T. S . D

13.3k

-+

100

BIAS

-+

13.3k

100

BIAS

DETECTION

OF REG-OUT

Vcc Vcc

BIAS

CURRENT

Vcc 100

13.3k

100

13.3k

+-

10k

+-

10k

BIAS

20

BIAS

D

+-

LEVEL SHIFT

x3/8x3/8

19

D

18 17

D D

LEVEL SHIFT

x2x2

2. Pin function

Pin No.

Symbol

I/O

1 OUT1- O CH1 negative output

2 OUT1+ O CH1 positive output

3 OUT2- O CH2 negative output

4 OUT2+ O CH2 positive output

5 IN2 I CH2 input

6 IN1 I CH1 input

7 VCC - Power supply terminal

8 VCC - Power supply terminal

9 REG-I I Regulator current detection terminal

10 REG-B O

Connect to base terminal of external transistor

11 REG-OUT O Constant voltage output (Connect to

collector terminal of external transistor)

12 IN3-R I CH3 reverse input

13 IN3-F I CH3 forward input

14 OUT3+ O CH3 positive output

15 OUT3- O CH3 negative output

16 GND - Ground

Function

Pin No.

Symbol

I/O

Function

17 OUT4- O CH4 negative output

18 OUT4+ O CH4 positive output

19 OUT5- O CH5 negative output

20 OUT5+ O CH5 positive output

21 IN5 I CH5 input

22 IN4 I CH4 input

23 VCC - Power supply terminal

24 BIAS IN I Bias input terminal

25 GND - Ground

26 GND - Ground

27 MUTE IN I Mute input terminal

28 IN6-R I CH6 reverse input

29 IN6-F I CH6 forward input

30 OUT6+ O CH6 positive output

31 OUT6- O CH6 negative output

32 GND - Ground

1-23

MX-K10

n

BA15218 / BA15218F (IC102 / IC852) :

1. Terminal layout & block diagram

Dual operational amplifier

OUT1 1

-IN1 2

8 Vcc

7 OUT2

1

+IN1 3

6 -IN2

2

G 4

5 +IN2

n BA3837 (IC103) : MIC Mixer

1. Terminal layout & block diagram

VCC

MIC

LOUT

FK

TK

LIN

BIAS

GND

1

+

2

-

3

4

5

6

7

8

+

SW2

SW1

L-R

L

+

-

+

-

+

L+R

R

+

C

16

B

15

LOGIC

A

14

ROUT

13

12

LP

+

-

11

LP

10

9

RIN

2. Pin function

10

11

12

13

14

15

16

Symbol

VCC

1

MIC

2

LOUT

3

4

5

6

7

8

9

FK

TK

LIN

BIAS

GND

RIN

LP

ROUT

A

B

C

Pin No.

I/O

Power supply

Microphone mixing input

I

Channel L output

O

Non connect

Channel L input

I

Signal bias

I

Connect to GND

Channel R input

I

Connects to LPF time constant element

O

Connects to LPF time constant element

O

LPF outpout

O

Channel R output

O

Mode select input A

I

Mode select input B

I

Mode select input C

I

Function

n

BU9253FS (IC851) : Low pass filter & echo mixer

1. Terminal layout & block diagram

2. Pin function

Pin No.

GND

16

1

OSC

CR

1

2

ECHO VR

15

2

COUNTER

MUTE

3

4

14

BIAS

3

VCC

5

6

13

DAINTO

DAINTI

DALPFI

DALPFO

4

D/A

5

6

- +

7

SRAM

ADINTI

A/D

12

ADINTO

11

ADLPFO

- +

10

ADLPFI

7

8

9

10

11

12

13

MIXO

9

8

MIX

MIXI

14

15

16

Symbol

GND

ECHO VR

BIAS

DAINTO

DAINTI

DALPFI

DALPFO

MIXO

MIXI

ADLPFI

ADLPFO

ADINTO

ADINTI

VCC

MUTE

CR

I/O

Connect GND

Echo level control

I

Analog part DC bias

DA side integrator output

O

DA side integrator intput

I

DA side LPF input

I

DA side LPF output

O

Mix AMP output for original tone& echo tone

O

Mix AMP input pin for original tone

I

AD side LPF input

I

AD side LPF output

O

AD side integrator output

O

AD side integrator input

I

Power supply

Mute control signal input

I

CR pin for oscillator

-

Function

1-24

n

LA1823DIP (IC1) : 1chip AM/FM, MPX tuner system

1. Block diagram

MX-K10

24

FM RF

AM RF

1 2 4 5 10 11 126 7 8 93

23

GND2

REG VCC1 GND1

22

AM MIX

AM

OSC

21

VCC2

OSC

BUFFER

2. Pin function

Pin No.

Symbol

I/O

1 AM_RFIN I AMRF signal input

2 REG. -

3 AM_OSC - AM local oscillation circuit

4 VCC_1 - Power supply terminal

5

FM_MIXOUT

O Output terminal for FM mixer

6 GND_1 - Ground

7

IF_BUFFER

O IF buffer output

8 ST_IND O Stereo indicator output

9

AM_MIXOUT

O Output terminal for AM mixer

10 FM_IF IN I Input of FMIF signal

11 AM_IF IN I Input of AMIF signal

12 AGC I AGC voltage input terminal

Function

20

FM

OSC

FM

MIX

MUTE

IF

BUFFER

No.

ST SW

17 16

DECODER

VCO FF FF

TRIG

STSD

Symbol

I/O

15

PHASE

COMP

FM

S-METERAMDET

FM

IF

14

PILOT

DET

FF

AM

IF

Function

13 FM_DET O FM detection signal output

14

15

ST/MON_SW

AM/FM_SW

I Stereo/Monaural switching signal input

I AM/FM switching signal input

16 L_OUT O Output L-channel

17 R_OUT O Output R-channel

18 MPX_IN I Multiplex signal input

19 DET_OUT O AM/FM detection output

20 FM_OSC - FM local oscillation circuit

21 VCC_2 - Power supply terminal

22

FM_RFOUT

O Output of FMRF signal

23 GND_2 - Ground

24 FM_RFIN I Input of FMRF signal

1319 18

FM

DET

AGC

1-25

MX-K10

n

LC72136N (IC2) : PLL Frequency synthesizer

1.Terminal layout

1

XTI

FM

CE

DI

CLOCK

DO

VCOSTOP

AM/FM

LW

MW

SDIN

2 3 4 5 6 7 8 9 10 11

22 21 20 19 18 17 16 15 14 13 12

XT GND LPFI LPFO PD VCC FMIN AMIN NC IFCNT IFIN

2. Block diagram

1

22

16

15

3

4

5

6

17

21

3. Pin function

Symbol

No.

XTI

1

FM

2

CE

3

4

5

6

7

8

9

10

11

DI

CLOCK

DO

VCOSTOP

AM/FM

NC

SDIN

Reference

Driver

Swallow Counter

1/2

C2B

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

782

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

-

Input/output port

-

Data input/output

I/O

Phase

Detector

Charge Pump

Unlock

Detector

Universal

Counter

11

13

Symbol

No.

IFIN

12

IFCNT

13

14

15

16

17

NC

AMIN

FMIN

VCC

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 supply(VDD=4.5 5.5V)

-

When power ON:Reset circuit move

PLL charge pump output(H: Local OSC

18

PD

O

frequency Height than Reference frequency.

L: Low Agreement: Height impedance)

Output for active lowpassfilter of PLL

19

20

21

22

LPFO

LPFI

GND

XT

O

Input for active lowpassfilter of PLL

I

Connected to GND

-

X'tal oscillator(75KHz)

I

1-26

n

TA8189N (IC401) : REC/PB amp.

1. Terminal layout 2. Block diagram

MX-K10

NF1

EQ1

GND

1

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

CH2_A CH2_B NF2 EQ2 PREOUT2 A/B_SW VCC CG REC_OUT2 REC_NF2 REC_IN2 ALC

23CH2_B

24CH2_A

1CH1_A

2CH1_B

2 3 4 5 6 7 8

9 10 11 12

CH1_A CH1_B

PREOUT1

MIX_OUT

GND1

EQSW

REC_OUT1

REC_NF1

REC_IN1

3. Pin function

No.

Symbol

I/O

1 CH1_A I Input for playback amp. (Ch1): A cassette

(PB)

2 CH1_B I Input for playback amp. (Ch1): B cassette

(REC/PB)

3 NF1 I NF terminal for playback amp.

4 EQ1 O Metal output for playback amp.

5 PREOUT1 O Output terminal for playback amp.

6 MIX_OUT O Mixing output

7 GND1 - Ground

8 EQSW I Metal/Normal mode select switch

9

REC_OUT1

O Output for recording amp.

10 REC_NF1 I NF terminal for recording amp.

11 REC_IN1 I Input for recording amp.

12 GND1 - Ground terminal

Function

NF2

22

3 54 6 7 8

NF1

No.

Ch2

+

Ch1

-

EQ2

EQ1

Symbol

PREOUT2

2021 19

PREOUT1

A/B

A/B_SW

VCC

CG

REC_OUT2

18

17

16

-

Ch2

+

ref

ref1

V

MIX_OUT

I/O

ref2

I

V

+

M/N

GND1

EQSW

Ch1

-

9

REC_OUT1

Function

13 ALC I ALC filter terminal

14 REC_IN2 I Input for recording amp.

15 REC_NF2 I NF terminal for recording amp.

16

REC_OUT2

O Output for recording amp.

17 CG O Charge detection terminal

18 VCC - Power supply terminal

19 A/B_SW I REC amp. Select switch (A cassette/B

cassette)

20 PREOUT2 O Output terminal for playback amp.

21 EQ2 O Metal output for playback amp.

22 NF2 I NF terminal for playback amp.

23 CH2_B I Input for playback amp. (Ch2): B cassette

(REC/PB)

24 CH2_A I Input for playback amp. (Ch2): A cassette

(PB)

REC_NF2

15

14 REC_IN2

13 ALC

ALC

12 GND

11 REC_IN1

10

REC_NF1

1-27

MX-K10

n

TC74HC4094AP (IC402) : 8-bit shift and store resister

1. Terminal layout

ST

CK

Q1

Q2

Q3

Q4

GND

1

2

SI

3

4

5

6

7

8

16

V

CC

OE

15

Q5

14

Q6

13

Q7

12

Q8

11

Q'S

10

QS

9

2. Block diagram

2

SI D Q

F/F

ØØ

QD

F/F

ØØ

DQ

F/F

DQ

F/F

DQ

F/F

DQ

F/F

Ø

DQ

F/F

9

10

DQ

F/F

QS

Q'S

CK

ST

OE

Ø Ø

3

1

15

Q

D

ØS

LATCH

ØS ØS

4

Q1

Ø Ø

LATCH

Q

D

QØS ØS

5

Q2

LATCH

QØ Ø

D

QØS ØS

6

Q3

LATCH

QØ Ø

D

QØS ØS

7

Q4

LATCH

QØ Ø

D

QØS ØS

14

Q5

LATCH

QØ Ø

D

QØS ØS

13

Q6

LATCH

QØ Ø

D

QØS ØS

12

Q7

Ø

LATCH

QØ

Ø

D

QØS ØS

11

Q8

1-28

n

TDA7440D (IC101) : Audio processor

1. Terminal layout

MX-K10

2. Block diagram

4

LIN1

5

LIN2

6

LIN3

7

LIN4

3

RIN1

2

RIN2

1

RIN3

28

RIN4

RIN3

RIN2

RIN1

LIN1

LIN2 VS

LIN3

LIN4

MUXO-L

IN(L)

MUXO-R

IN(R)

BIN(R)

BOUT(R)

BIN(L)

100K

1

2

3

4

5

6

7

8

9

10

11

12

13

14

G

0/30dB

2dB STEP

G

INPUT MULTIPLEXER

+ GAIN

MUXO-L IN(L)

MUXO-R IN(R)

28

RIN4

LOUT

27

26

ROUT

25

AGND

24

CREF23

SDA

22

SCL

21

DGND

20

TRE(R)

19

18

TRE(L)

17

N.C.

16

N.C.

15

BOUT(L)

BASS

R

B

BOUT(L)

BOUT(R)BIN(R)

SPKR ATT

LEFT

SPKR ATT

RIGHT

V

REF

SUPPLY

CREF

TRE(L)

8 9 18 14 15

VOLUME

10 11 19 12 13 23

TREBLE

I2CBUS DECODER + LATCHES

TREBLE

TRE(R)

BIN(L)

27

LOUT

21

SCL

22

SDA

20

DGND

26

ROUT

24

VS

25

AGND

1-29

MX-K10

n

MN662748RPM (IC601) : Digital servo & digital signal processor

1. Terminal layout

80~61

1

60

20

21~40

2. Pin function

Pin No

1 BCLK 2 LRCK 3 SRDATA 4 DVDDI 5 DVSSI 6TX 7 MCLK

8 MD ATA

9 MLD

10 SENSE 11 FLOCK 12 TLOCK 13 BLKCK

14 SQCK

15 SUBQ 16 DMUTE 17 STAT 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

32 FE

33 TE

34 RFENV

35 VDET

36 OFT

37 TRCRS 38 /RFDET

39 BDO

40 LDON

41

Symbol Function

I/O I/O

-

Not use

-

Not use

-

Not use

-

Power supply for digital circuit

-

GND for digital circuit

-

Not use

I

Micro computer command clock signal input

I

Micro computer command data input

I

Micro computer command load signal input (L: Load)

-

Not use, connect to TP7

-

Not use, connect to TP6

-

Not use, connect to TP5

O

Sub code block clock signal output

I

External clock input for sub code Q register input

O

Sub code Q data output

I

Muting input (H: Mute)

O

Status signal input

I

Reset signal input (L: Reset)

-

Not use

-

Not use, connect to TP8

O

Traverse enforced output

O

Traverse drive output

-

Not used

O

Spindle motor drive signal (Enforced mode output)

O

Spindle motor drive signal (Servo error signal output)

O

Kick pulse output

O

Tracking drive output

O

Focus drive output

I

Reference voltage for D/A output block

O

Focus balance adjust signal output

O

Tracking balance adjust signal output

I

Focus error signal input (Analog input)

I

Tracking error signal input (Analog input) RF envelope signal input

I

(Analog input) Vibration detect signal

I

input (H:Detect) Off track signal input

I

(H:Off track) Track cross signal input

I

RF detect signal input

I

(L:Detect) Drop out signal input

I

(H:Drop out) Laser on signal output

O

(H:ON)

Symbol Function

No

41 PLLF2 42 TOFS 43 WVEL 44 ARF 45 IREF 46 DRF 47 DSLF 48 PLLF 49 VCOF 50 AVDD2

51 AVSS2 52 EFM 53 PCK 54 VCOF2

55 SUBC 56 SBCK 57 VSS

58 X1

59 X2

60 VDD

61 BYTCK/TRVSTP 62 CLDCK

63 FCLK 64 IPFLAG

65 FLAG

66 CLVS 67 CRC 68 DEMPH

69 RESY 70 IOSEL

71 /TEST

72 AVDD1

73 OUTL 74 AVSS1 75 OUTR 76 RSEL

77 CSEL

78 PSEL

79 MSEL

80 SSEL

-

I I

I I/O I/O I/O

-

O

I/O

-

I

O

-

O

-

O

-

O

-

I

-

O

-

O

I

Not use Not use Not use RF signal input Reference current input Bias pin for DSL Loop filter pin for DSL Loop filter pin for PLL Loop filter pin for VCO Power supply for analog circuit GND for analog circuit Not use, connect to TP12 Clock output for PLL Loop filter pin for Digital servo VCO Not use Not use GND for crystal oscillation circuit Input for crystal oscillation circuit (f=16.9344MHz) Output for crystal oscillation circuit (f=16.9344MHz) Power supply for crystal oscillation circuit Not use Sub code frame clock signal output Not used Interpolation flag signal output, Connect to TP11 Flag signal output, Connect to TP10 Not use Not use De-emphasis detect signal output, Connect to TP9 Not use Mode select pin, Connect to DVDD1 (H fix) Test pin, Connect to DVDD1 (H fix) Power supply for analog circuit L-channel audio output GND for analog circuit R-channel audio output

RF signal polarity setting pin, Connect to DVDD1 (H fix) Oscillation frequency setting pin, Connect to GND (L fix)

IOSEL=H, Test pin, Connect to GND (L fix) IOSEL=H, SMCK output, Frequency select pin

IOSEL=H, SMCK output, SUBQ output mode select pin

1-30

< MEMO >

MX-K10

1-31

MX-K10

VICTOR COMPANY OF JAPAN, LIMITED

AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEM CATEGORY 10-1,1 chome,Ohwatari-machi,maebashi-city,371-8543,Japan

No.21173

Printed in Japan

200305