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.
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
Page 3
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
Page 4
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
Page 5
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
Page 6
MX-K10
<Disassembly of the main blocks of this set>
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
WA
Fuse(F952)
T1.6AL 250V
FW951
Fig.2
1-6
Fuse(F952)
T1.6AL 250V
Fuse(F951)
T1.6AL 250V
Fuse(F953)
T1AL 250V
Page 7
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
D
Fig.5
1-7
Page 8
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
Page 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
Page 10
MX-K10
<Disassembly of units and assembly
inside this set>
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
Page 11
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
Page 12
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
NO
d
1-12
Fig.20
Obligue gear
Fig.19
Page 13
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
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
Page 14
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
Page 15
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
Page 16
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 HeadREC/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
Page 17
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
Page 18
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
Page 19
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
Page 20
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
Page 21
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.
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
Page 31
< MEMO >
MX-K10
1-31
Page 32
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
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