JVC MXK-10, MXK-30 Service manual
MX-K30/MX-K10
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
MX-K30/MX-K10
3-CD
PLAY & EXCHANGE
CD-R/RW PLAYBACK
SOUND
P
K
C
MODE
REPEAT
O
1 BIT
DUAL D/A
R
CONVERTER
PROGRAM
E
M
U
L
O
V
PANDOM
PRESET
TUNING
ACTIVE
BASS EX.
CLOCK
TAPE
/TIMER
A / B
O
P
C
L
A
C
I
S
S
P
I
K
S
C
S
I
D
3
D
C
2
D
C
1
D
C
CD1CD2CD
REPEAT
SOUND
MODE
ACTIVE
BASS EX.
COMPACT COMPONENT SYSTEM
STANDBY/ON
SLEEP
AUX
FM MODE
FM /AM
3
CD
PROGRAM
/RANDOM
TAPE
TAPE
A/B
VOLUME
FADE
MUTING
MX-K30
STANDBY/ON
STANDBY
SET
CANCEL
/ DEMO
PHONES
REC START
/ STOPCD REC START DUBBING
STANDBY/ON
SLEEP
AUX
FM MODE
FM /AM
CD1CD2CD
3
CD
PROGRAM
REPEAT
/RANDOM
TAPE
TAPE
A/B
SOUND
VOLUME
MODE
FADE
ACTIVE
MUTING
BASS EX.
Contents
Safety precautions
Important for laser products
Preventing static electricity
Disassembly method
Adjustment method
CA-MXK30SP-MXK30 SP-MXK30
BASS-REFLEX BASS-REFLEX
COMPACT COMPONENT SYSTEM
STANDBY/ON
STANDBY
PHONES
1-2
1-3
1-4
1-5
1-18
PLAY & EXCHANGE
MX-K10
1 BIT
SET
CANCEL
/ DEMO
REC START
DUBBING
/ STOPCD REC START
CLOCK
/TIMER
CA-MXK10SP-MXK10
3-CD
CD-R/RW PLAYBACK
SOUND
P
K
O
C
MODE
REPEAT
P
O
DUAL D/A
R
CONVERTER
PROGRAM
C
L
A
C
I
S
S
E
M
U
L
O
V
PANDOM
PRESET
TUNING
TAPE
A / B
P
I
K
S
C
S
I
D
3
D
C
ACTIVE
2
D
C
BASS EX.
1
D
C
SP-MXK10
Flow of functional
operation until TOC read
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
Area Suffix
J U.S.A.
C Canada
1-20
1-21
1-21
1-22~28
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
No.21084
Oct. 2002
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 property
damage resulting therefrom.
3. Many electrical and mechanical parts in the products have special safety-related characteristics.
These characteristics are often not evident from visual inspection nor can the protection afforded
by them necessarily be obtained by using replacement components rated for higher voltage,
wattage, etc. Replacement parts which have these special safety characteristics are identified in
the Parts List of Service Manual. Electrical components having such features are identified by
shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a
substitute replacement which does not have the same safety characteristics as the recommended
replacement parts shown in the Parts List of Service Manual may create shock, fire, or other
hazards.
4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the
like to be separated from live parts, high temperature parts, moving parts and/or sharp edges
for the prevention of electric shock and fire hazard. When service is required, the original lead
routing and dress should be observed, and it should be confirmed that they have been returned
to normal, after re-assembling.
5. Leakage currnet check (Electrical shock hazard testing)
After re-assembling the product, always perform an isolation check on the exposed metal parts
of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control
shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.
Do not use a line isolation transformer during this check.
Plug the AC line cord directly into the AC outlet. Using a "Leakage Current Tester", measure
the leakage current from each exposed metal parts of the cabinet , particularly any exposed
metal part having a return path to the chassis, to a known good earth ground. Any leakage
current must not exceed 0.5mA AC (r.m.s.)
Alternate check method
Plug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms
per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by
a 0.15 F AC-type capacitor between an exposed
metal part and a known good earth ground.
Measure the AC voltage across the resistor with the
AC voltmeter.
Move the resistor connection to eachexposed metal
part, particularly any exposed metal part having a
return path to the chassis, and meausre the AC
voltage across the resistor. Now, reverse the plug in
the AC outlet and repeat each measurement. voltage
measured Any must not exceed 0.75 V AC (r.m.s.).
This corresponds to 0.5 mA AC (r.m.s.).
0.15 F AC TYPE
1500 10W
Good earth ground
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
Place this
probe on
each exposed
metal part.
1-2
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.
CAUTION
!
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.
FUSE CAUTION
(S).
FUSE (S).
C UTI N :
CONTINUED PROTECTION
AGAINST FIRE HAZARD,
REPLACE ONLY WITH
SAME TYPE AND RATING
FUSE
C UTI N :
WITH SAME TYPE
TTENTI N :
REMPLACER PAR UN (LES) FUSIBLE (S)
DE MEME TYPE.
FOR
REPLACE
Important for laser products
1.CLASS 1 LASER PRODUCT
2.DANGER : Invisible laser radiation when open and inter
lock failed or defeated. Avoid direct exposure to beam.
3.CAUTION : There are no serviceable parts inside the
Laser Unit. Do not disassemble the Laser Unit. Replace
the complete Laser Unit if it malfunctions.
4.CAUTION : The compact disc player uses invisible
laserradiation and is equipped with safety switches
whichprevent emission of radiation when the drawer is
open and the safety interlocks have failed or are de
feated. It is dangerous to defeat the safety switches.
5.CAUTION : If safety switches malfunction, the laser is able
6.CAUTION : Use of controls, adjustments or performance of
to function.
procedures other than those specified herein may result in
hazardous radiation exposure.
CAUTION
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
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.
1-3
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 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.
CD changer
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
unit
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 CN601
on 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
CD changer
mechanism
assembly
1-4
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
Top cover
CD changer unit
Front panel assembly
Chassis unit
CD changer unit
Removing the main PCB
Removing the CD changer mechanism assembly
Removing the CD pickup
Replacing the loading motor and belt of the CD changer tray
Replacing the CD tray rotor belt of CD changer, and removing the motor
Front panel assembly
Removing the cassette deck mechanism
Removing the earphone jack PCB
Removing the control/FL PCB
Removing the switch PCB and ACTIVE BASS EX. switch PCB
Removing the cassette deck main motor, and replacing the main belts
Removing the leaf switches of the cassette deck mechanism
Removing the cassette deck heads
Chassis unit
Removing the 3-pin regulator
Removing the power amp and supply PCB and the Power Trans PCB
1-5
<Disassembly of the main blocks of this set>
Replacement of the fuses and the power IC
Replacing the fuses (See Fig.1)
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.
Fuse (F951)
1.6A 250V
Fuse (F951)
3.15A 250V
Fuse (F952)
1.6A 250V
FW 951
Fig.1(A)For MX-K10
Replacing the power IC (See Fig.2 to 3)
Prior to performing the following procedure, remove
the top cover.
1.
Remove the two screws "A" from the heat sink
between the power IC.
2.
Remove the solder fixing the power IC.
W
A
Fuse (F952)
1.6A 250V
FW 951
Fig.1(B)For MX-K30
W A
Fig.3For MX-K30
Replacing the heat sink cover
1. Remove the six screws "B" from the back panel.
2. Pull the heat sink cover outward.
1-6
Fig.2For MX-K10
B
Removing the top cover and two sides BOARD
(See Fig.5 and 6)
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 tw
3.
Remove the top cover from the body by lifting it
toward the rear.
o sides of the body.
Top cover
B
Front panel assembly
C
Front panel assembly
C
Fig.5
D
D
Fig.6
1-7
Removing the CD changer unit
(See Fig.7 to 10)
Prior to performing the following procedures,
remove the top cover and botn 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.
Push the CD tray deep into the set.
c.
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
Fig.7
CD changer
unit
Fig.10
CD tray panel
Fig.8
G
E
Accessory
terminal
F
Antenna
termianl
F
Fig.9
1-8
Removing the front panel assembly
(See Fig.11 and 12)
Prior to performing the following procedures,
remove the top cover and both sides board.
Also remove the CD changer unit.
1.
Disconnect the parallel wire and card wire from the
connectors CN702,CN701,CN101on the power amp
and supply PCB.
2.
Remove the two screws "H" retaining the front
panel assembly onto the bottom of the body.
Remove the screw "I" retaining the cassette dec k
3.
mechanism and then remove the GND lug "b" that
comes from the power amp and supply PCB.
Disengage the claws "c" on both sides at the
4.
bottom of the front panel assembly and then
remove the assembly.
H
Fig.11
Claw c
GND lug b
Power amp and
supply PCB
I
Fig.12
1-9
<Disassembly of units and assembly
inside this set>
Removing the CD PCB
(See Fig.13 and 14)
Prior to performing the following procedures,
remove the top cover and both sides board.
Also remove the CD changer unit.
Disconnect the wires from CN603A, CN603B and
1.
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.
Remove the CD PCB b y pulling it toward the side
3.
where the CN601 is located.
4.
Using solder, short the CD pickup to connect to
short round.
[Caution]
5.
Disconnect the card wire from the connector
CN601 on the main PCB and then remove the
main PCB.
After re-connecting the wires, be sure to
remove the shorting solder from the GND
connection.
CD PCB
J
Fig.13
CD PCB
CN601
Short round
Fig.14
1-10
Removing the CD changer mechanism
assembly (See Fig.15 to 17)
Prior to performing the following procedures,
remove the top cover and both sides board.
Also remove the CD changer unit.
1.2.Remove the s crews"d" from the front chuch base
of the CD changer mechanism unit.
Turn the CD changer mechanism cover base
and remove the screws "e" connecting the unit to
the CD changer mechanism assembly.
Remove the four screws "k" retaining the CD
3.
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 ..
d
Fig.15
CD changer
unit
CD changer
mechanism
assembly
K ( Silver color) K ( copper color)
K ( Silver color)
K ( copper color)
Fig.17 Fig.16
e
1-11
Removing the CD pickup (See Fig.18)
Prior to performing the following procedures,
remove the top cover and both sides board.
Also remove the CD changer unit.
Also remove the CD changer mechanism
1.2.Widen the section "f ".
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.
Replacing the loading motor and rotor
blet of the CD changer (See Fig .19)
Prior to performing the following procedure,
remove the top cover.
Also open the CD changer tray.
1.2.Remove the two screws "L" retaining the CD
changer tray loading motor.
Remove the two screws "M' retaining the gear plate
and take it out, after remove the rotor belt from the
pulley.
CD pickup
f
Shaft
Fig.18
g
Replacing the CD turn table and removing
the motor (See Fig. 20 and 21)
Prior to performing the following procedures,
remove the top cover.
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
M
L
Fig.19
N O
1-12
, and then remove the CD tray
.
Fig.21
Motor locker
d
Obligue gear
Fig.20
Removing the cassette deck mechanism
(See Fig.22)
Prior to performing the following procedure, remove
the top cover and both sides board.
Also remove the CD changer unit.
Also remove the front panel assembly.
1.Remove the five screws "Z" retaining the cassette
deck mechanism.
Removing the earphone jack PCB
(See Fig.23)
Prior to performing the following procedure, remove
the top cover and both sides board.
Also remove the CD changer unit.
Also remove the front panel assembly.
Remove the screw with the washer, "P" that retains
1.
the earphone jack PCB.
Front panel
assembly
Z
Z
Fig.22
Front panel
assembly
Earphone jack
PCB
P
Removing the control/FL PCB
(See Fig.24)
Prior to performing the following procedure, remove
the top cover and both sides board.
Also remove the CD changer unit.
Also remove the CD changer unit.
Also remove the CD changer unit.
1. Remove the three screws "Q" that retain the
control/FL PCB from the back of the front panel
unit.
Fig.23
Front panel
assembly
Q
Control/FL
PCB
Fig.24
1-13
Removing the switch PCB and sound mode
and CD function switch PCB
(See Fig.24 to 27)
Prior to performing the following procedures,
remove the top cover and both sides board.
Also remove the CD changer unit.
Also remove the front panel assembly.
1.
Pull out the volume control 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
Volume knob
Fig.25
Front panel
assembly
Volume shaft
Fig.26
Key 2 PCB
S
R
T
Key 3 PCB
1-14
R
Key 1 PCB
Fig.27
Removing the cassette deck main
motor, and replacing the main belts
(See Fig.22, 28 and 29)
Prior to performing the following procedures,
remove the top cover and both sides board.
Also remove the CD changer unit.
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]
4.
From the backside of the cassette deck, remove
the main motor and two main belts.
After attaching the main motor, check the
orientation of the motor and the polarity of
the wires.
Cassette deck mechanism
(Front side)
Fig.28
Cassette deck mechanism
(Back side)
t
Cassette deck main motor
[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.
Removing the leaf switches of the
cassette deck mechanism
(See Fig.22 and 30)
Prior to performing the following procedures,
remove the top cover and both sides board
Also remove the CD changer unit.
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.
Pull out the leaf switches from the front side of the
5.
cassette deck mechanism.
Main belt
(For B cassette)
Main belt
(For A cassette)
Fig.29
Solder side of leaf switch
Cassette deck mechanism
(Back side)
Fig.30
1-15
Removing the cassette deck heads
(See Fig.22 and 31)
Prior to performing the following procedures,
remove the top cover and both sides board.
Also remove the CD changer unit.
Also remove the front panel assembly.
Remove the five screws "O" that retain the cassette
1.
deck mechanism.
Remove the cassette deck mechanism and place it
2.
so that the front side faces up.
Remove the solder from the bottom side of the
3.
head terminal and disconnect the wire.
Remove the screw "U" that retains the head.
4.
5.
Remove the screw "V" that retains the head.
Hold the head and slide it in the direction of the
6.
arrow to remove it.
Removing the 3-pin regulator Q904, Q907
(See Fig. 32 and 33)
Prior to performing the following procedures,
remove the top cover and both sides board.
1.
Remove the two screws "A" that connect the heat
sink cover to the rear panel.
2.
Pull the heat sink outward.
3.
Remove the screw "W" that retains the heat sink
the 3-pin terminal regulator. Q904, Q907
4.
Remove the solder fixing the 3-pin regulator.
Cassette deck mechanism
(Front side)
PB Head REC/PB Head
VU
Fig.31
AW
For MX-K30 Fig.32
VU
1-16
AW
For MX-K10 Fig.33
Removing the power amp and supply
PCB and the power trans PCB
(See Fig.2, 3, 32, 34 to 37)
Prior to performing the following procedures,
remo
ve the top cover and both sides board.
Also remove heat sink cover.(Fig. 4)
Remove the two screws "A" connecting the heat
1.
sink cover to the rear panel.(Fig. 2.3)
Pull out the heat sink co
2.
Remove teh three (MX-K10)/ four(MX-K30)screws
3.
"AA" form the (MX-K10) chassis /MX-K30 back panel
between the heat sink.
Remove the two screws "X" that retain the
3.
speaker terminals and AUX terminal.
4.
Remove the screw "YY" that retains the rear panel,
and then remove the rear panel.
5.
Disconnect the parallel wires from the connectors
FW951 on the power trans PCB.
Remove the screw "Z" that retain the power amp
6.
and supply PCB and then remove the assembly.
Remove the clamp of AC power cord from the
7.
chassis.
8.
Remove the four screws "AB" that retain the
power trans PCB and then remove the assembly.
ver toward you.
X
Clamp
YY
For MX-K10 Fig.34 (A)
AA
FW951
FUSE 952
1.6A 250V
FUSE 951
1.6A 250V
FW951
FUSE 952
1.6A 250V
FUSE 951
3.15A 250V
For MX-K10 Fig.35 (A) For MX-K30 Fig.35 (B)
Power amp and
supply PCB
Rear panel
For MX-K10 Fig.34 (B)
x
Y
Clamp
For MX-K30 Fig.34 (B)
Chassis
Z
Fig.36
Clamp
AB
AB
For MX-K30 Fig.37 (B)For MX-K10 Fig.37 (A)
1-17
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 azimuth(10kHz )
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
Radio input signal
AM modulation frequency : 400Hz
Modulation factor : 30%
FM modulation frequency : 400Hz
Frequency displacement : 22.5kHz
Frequency Range
AM 531kHz~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
Measurement conditions
Power supply voltage
AC120V (60Hz)
Measurement
output terminal : Speaker out
: TP101(Measuring for TUNER/DECK/CD)
: Dummy load 6ohm
Precautions for measurement
1. Apply 30pF and 33kohm to the IF sweeper output
side and 0.082 F and 100kohm in series to
the sweeper input side.
2. The IF sweeper output level should be made as
low as possible within the adjustable range.
3. Since the IF sweeper is a fixed device, there is
no need to adjust this sweeper.
4. Since a ceramic oscillator is used, there is no need
to perform any MPX adjustment.
5. Since a fixed coil is used, there is no need to adjust
the FM tracking.
6. The input and output earth systems are separated.
In case of simultaneously measuring the voltage
in both of the input and output systems with an
electronic voltmeter for two channels, therefore,
the earth should be connected particularly.
7. In the case of BTL connection amplifier, the minus
terminal of speaker is not for earthing. Therefore,
be sure not to connect any other earth terminal
to this terminal. This system is of an OTL system.
1-18
Arrangement of adjusting positions
Cassette deck mechanism
(Front side)
Main P.C.B.
L301L301
CN308
CN308
8-Pin
8-Pin
PB Head
(Deck-A)
Head azimuth screw
(Forward side)
Head azimuth screw
(Reverse side)
Head azimuth screw
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)
(Forward side)
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.
REC/PB Head
(Deck-B)
Head azimuth screw
(Reverse side)
Measurement method
L2L2
Maximum output
T1T1
Standard
values
TUNER P.C.B.
Adjusting
positions
Adjust the head
azimuth screw
only when the
head has been
changed.
Recording Bias
Frequency Alignment
Test tape
: TYPE AC-514
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)
Tuner section
Items
AM Tracking
Alignments
AM IFT Alignments
Note: The adjustment of CD section is not required.
Measurement
conditions
Input signal
: 530kHz (529kHz)
600kHz (603kHz)
Adjustment point
: Antenna coil (L2)
Input signal
: 530kHz (529kHz)
Adjustment point
: IFT (T1)
1. Set the Signal Generator signal to 530KHz (529KHz)
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.)
1. Set the receiving frequency to 530KHz (529KHz )
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.)
Measurement method
80kHz+/-3kHz
Standard
values
V. T
: 1.40V+/-0.05V
Maximum
sensitivity
Maximum output
Use the HighImpedance Probe
for 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
Flow of functional operation until TOC read
Power ON
Play Key
Slider turns REST
SW ON.
Automatic tuning
of TE offset
Confirm that the voltage at the pin5
of CN602 is "H"\"L"\"H".
Check Point
Tracking error waveform at TOC reading
Approx.3sec
Tracking
servo
off states
Automatic measurement
of TE amplitude and
automatic tuning of
TE balance
VREF
pin 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
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 TP3.
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
Description of major ICs
AN22000A (IC611) : CD-DA Head Amp.
1. Terminal layout
2. Pin function
1
16 17
3. Block diagram
624754 8
RFOUT
RF_EQ
RFIN
AGC
32
Pin
Symbol
No.
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
5 RFOUT O RF adder Amp. output terminal
6 RFIN I AGC input terminal
7 CAGC I Input terminal for AGC loop
8 ARF O AGC output terminal
9 CBA I Capacitor connecting terminal
10 3TOUT O 3 TENV output terminal
11 CBOO I Capacitor connecting terminal
12 BDO O BDO output terminal
13 COFTR I Capacitor connecting terminal
14 OFTR O OFTR output terminal
11 12
BDO
I/O
13 14
OFTR
Function
terminal
filter capacitor
for HPF-Amp.
for envelope detection on the
darkness side
for envelope detection on the
light side
9
Pin
Symbol
No.
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
22 FEN I FE Amp. inverting input
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
I/O
Function
terminal
terminal
32
31
30
29
27
28
NRFDET
AMP
AMP
AMP
AMP17GCA BCA
+
-
GCA BCA
GCA BCA
GCA BCA
SUBT
SUBT
3TENV
-
+
-
+
VDET
-
+
10
15
22
23
21
20
19
18
2
LD
1-22
PD
1
GCTL
TBAL
26
FBAL
25 16 3
BA15218DIP (IC102) : Dual low noise operational amp.
1. Terminal layout
OUT1
- IN1
+-
+IN1
VEE
Vcc
OUT2
- IN2
-+
+IN2
BA5936S (IC621) : 6 channel BTL driver
1. Block diagram
32
31
30
29
x2
x2
D
D
x3/828x3/8
LEVEL SHIFT
LEVEL SHIFT
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
CURRENT
BIAS
Vcc 100
13.3k
100
+-
13.3k
10k
+-
10k
BIAS
20
BIAS
D
+-
LEVEL SHIFT
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
LA1823DIP (IC1) : 1chip AM/FM, MPX tuner system
1. Block diagram
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
OSC
MIX
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
FM
15
PHASE
COMP
FM
S-METERAMDET
FM
IF
I/O
PILOT
DET
FF
AM
MUTE
IF
BUFFER
ST SW
Pin
No.
17 16
DECODER
VCO FF FF
TRIG
STSD
Symbol
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
14
IF
1319 18
FM
DET
AGC
Function
1-24
LC72136N (IC2) : PLL Frequency synthesizer
1.Terminal layout
1
CLOCK
VCOSTOP
AM/FM
MW
SDIN
2. Block diagram
XTI
FM
CE
DI
DO
LW
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
1
22
16
15
3
4
5
6
17
21
3. Pin function
Pin
Symbol
No.
XTI
1
FM
2
3
4
5
6
7
8
9
10
11
CE
DI
CLOCK
DO
VCOSTOP
AM/FM
NC
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
1/16,1/17 4bit
12bit
Programmable
DriverS
Data Shift Register & Latch
7821113
6pin(output): H
Input for receive the serial data from
I
controller
Sync signal input use
I
Data output for Controller
O
Output port
"Low": MW mode
O
Open state after the power on reset
O
Input/output port
-
Input/output port
-
Data input/output
I/O
Phase
Detector
Charge Pump
Unlock
Detector
Universal
Counter
Pin
No.
12
13
14
15
16
17
18
19
20
21
22
Symbol
IFIN
IFCNT
NC
AMIN
FMIN
VCC
PD
LPFO
LPFI
GND
XT
18
19
20
12
I/O
Function
IF counter signal input
I
IF signal output
O
Not use
-
AM Local OSC signal output
I
FM Local OSC signal input
I
Power supply(VDD=4.5 5.5V)
-
When power ON:Reset circuit move
PLL charge pump output(H: Local OSC
O
frequency Height than Reference frequency.
L: Low Agreement: Height impedance)
Output for active lowpassfilter of PLL
O
Input for active lowpassfilter of PLL
I
Connected to GND
-
X'tal oscillator(75KHz)
I
1-25
TA8189N (IC401) : REC/PB amp.
1. Terminal layout 2. Block diagram
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
Pin
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
Ch2
+
+
Ch1
-
Pin
No.
EQ2
EQ1
Symbol
PREOUT2
2021 19
PREOUT1
A/B
A/B_SW
VCC
18
ref
ref1
I
V
GND1
MIX_OUT
I/O
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)
17
M/N
CG
REC_OUT2
16
ref2
V
9
EQSW
REC_OUT1
Ch2
Ch1
REC_NF2
15
-
+
+
-
10
REC_NF1
14 REC_IN2
13 ALC
ALC
12 GND
11 REC_IN1
Function
1-26
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
Ø
DQ
F/F
9
10
DQ
F/F
Q
S
Q'
S
CK
OE
Ø Ø
3
1
ST
15
Q
D
ØS
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
Ø
D
QØS ØS
11
Q8
1-27
TDA7440D (IC101) : Audio processor
1. Terminal layout
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
100K
100K
100K
100K
100K
100K
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
BASS
R
R
B
B
BOUT(L)
BOUT(R)BIN(R)
SPKR ATT
LEFT
SPKR ATT
RIGHT
V
REF
SUPPLY
CREF
TRE(L)
BIN(L)
8 9 18 14 15
VOLUME
VOLUME
10 11 19 12 13 23
TREBLE
I2CBUS DECODER + LATCHES
TREBLE
TRE(R)
27
LOUT
21
SCL
22
SDA
20
DGND
26
ROUT
24
VS
25
AGND
1-28
MX-K3O/MX-K10
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.21084
Printed in Japan
200210(A)
MX-K30/MX-K10
SCHEMATIC DIAGRAMS
COMPACT COMPONENT SYSTEM
MX-K30/MX-K10
CD1CD2CD
REPEAT
SOUND
MODE
ACTIVE
BASS EX.
REPEAT
SOUND
MODE
BASS EX.
PROGRAM
/RANDOM
CD1CD2CD
ACTIVE
CD-ROM No.SML200210
J
C
3-CD
PLAY & EXCHANGE
CD-R/RW PLAYBACK
SOUND
P
COMPACT COMPONENT SYSTEM
STANDBY/ON
SLEEP
AUX
FM MODE
FM /AM
3
CD
TAPE
TAPE
A/B
VOLUME
FADE
MUTING
MX-K30
1 BIT
STANDBY/ON
STANDBY
SET
CANCEL
/ DEMO
PHONES
REC START
/ STOPCD REC START DUBBING
/TIMER
MODE
REPEAT
DUAL D/A
CONVERTER
PROGRAM
E
M
U
L
O
V
PANDOM
PRESET
TUNING
ACTIVE
BASS EX.
CLOCK
TAPE
A / B
K
O
C
P
O
R
C
L
A
C
I
S
S
P
I
K
S
C
S
I
D
3
D
C
2
D
C
1
D
C
Area Suffix
U.S.A.
Canada
CA-MXK30SP-MXK30 SP-MXK30
BASS-REFLEX BASS-REFLEX
STANDBY/ON
SLEEP
AUX
FM MODE
FM /AM
3
CD
PROGRAM
/RANDOM
TAPE
TAPE
A/B
VOLUME
FADE
MUTING
COMPACT COMPONENT SYSTEM
STANDBY/ON
STANDBY
PHONES
MX-K10
SET
CANCEL
/ DEMO
REC START
DUBBING
/ STOPCD REC START
3-CD
PLAY & EXCHANGE
SOUND
MODE
REPEAT
1 BIT
DUAL D/A
CONVERTER
PROGRAM
E
M
U
L
O
V
PANDOM
PRESET
TUNING
ACTIVE
BASS EX.
CLOCK
TAPE
/TIMER
A / B
CD-R/RW PLAYBACK
K
C
O
R
C
L
A
P
O
P
C
I
S
S
IP
K
S
C
S
I
D
3
D
C
2
D
C
1
D
C
Contents
Wiring Diagram
Standard schematic diagrams
Printed circuit boards
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
CA-MXK10SP-MXK10
SP-MXK10
2-2
2-4
2-18~33
No.21084SCH
Oct. 2002
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