Area suffix
US ---------------------- Singapore
UX ------------------- Saudi Arabia
Safety precautions
Preventing static electricity
Important for laser products
Disassembly method
Adjustment method
Flow of functional operation
until TOC read
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
1-2
1-3
1-4
1-5
1-20
1-22
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
Wiring connections
1-23
1-23
1-24
1-35
No.21033
Nov. 2001
Page 2
MX-K35V
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 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
Good earth ground
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
Place this
probe on
each exposed
metal part.
!
1. This equipment has been designed and manufactured to meet international safety standards.
2. It is the legal responsibility of the repairer to ensure that these safety standards are maintained.
3. Repairs must be made in accordance with the relevant safety standards.
4. It is essential that safety critical components are replaced by approved parts.
5. If mains voltage selector is provided, check setting for local voltage.
Burrs formed during molding may
be left over on some parts of the
chassis. Therefore, pay attention to
such burrs in the case of
preforming repair of this system.
In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the
parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the " "
mark nearby are critical for safety.
(This regulation does not correspond to J and C version.)
1-2
Page 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.
MX-K35V
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.
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
CD changer
unit
CD changer
mechanism
assembly
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.
Fig.2
Fig.1
Soldering
1-3
Page 4
MX-K35V
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.
VARNING : Osynlig laserstrålning är denna del är öppnad
och spårren är urkopplad. Betrakta ej strålen.
VARO : Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle lasersäteilylle.Älä katso
säteeseen.
5.CAUTION : If safety switches malfunction, the laser is able
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
CAUTION
!
Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
ADVARSEL : Usynlig laserstråling ved åbning , når
sikkerhedsafbrydere er ude af funktion. Undgå
udsættelse for stråling.
ADVARSEL : Usynlig laserstråling ved åpning,når
sikkerhetsbryteren er avslott. unngå utsettelse
for stråling.
REPRODUCTION AND POSITION OF LABELS
WARNING LABEL
DANGER: Invisible laser
radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE
TO BEAM. (e)
CLASS 1
LASER PRODUCT
ADVARSEL: Usynlig laserstråling ved åbning, når
sikkerhedsafbrydere er ude
af funktion. Undgåudsættelse for stråling (d)
VARNING: Osynlig laserstrålning när denna del är
öppnad och spärren är
urkopplad. Betrakta ej
strålen. (s)
VARO: Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle
lasersäteilylle. Älä katso
säteeseen. (f)
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Page 5
MX-K35V
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 IC1-6
Top cover1-7
CD changer unit1-8
Front panel assembly1-9
Chassis unit1-17
CD changer unit1-8
Removing the main board1-10
Removing the CD changer mechanism assembly1-11
Removing the CD pickup1-12
Replacing the loading motor and belt of the CD changer tray1-12
Replacing the CD tray rotor belt of the CD changer, and removing the motor1-12
Front panel assembly1-9
Removing the cassette deck mechanism1-13
Removing the head phone board1-13
Removing the microphone amplifier board1-14
Removing the control/FL board1-14
Removing the switch board and active bass ex. switch board1-15
Removing the cassette deck main motor, and replacing the main belts1-16
Removing the leaf switches of the cassette deck mechanism1-16
Removing the cassette deck heads1-17
Chassis unit1-17
Removing the Video & CD board 1-17
Removing the 3-pin regulator1-18
Removing the power amplifier board, voltage selector board
and power transformer board1-19
1-5
Page 6
MX-K35V
<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 top cover.
1.
Replace the fuses inside.
Fuse (F953)
1.25A 250V
Fuse (F951)
2.5A 250V
Power transformer
board
[Caution] Be sure to use fuses with the specified
ratings.
Replacing the power IC (See Fig.2 to 4)
Prior to performing the following procedure, remove
the top cover.
1.
Remove the two screws A that attach the heat sink
cover to the rear panel.
2.
Pull the heat sink cover outward.
3.
Remove the two screws B from the bracket that
retains the power IC.
4.
Remove the solder fixing the power IC.
Fuse (F952)
1.6A 250V
Chassis
Fig.1
Rear panel
A
Rear panel
B
Heat sink
Heat sink cover
Fig.2
Power amplifier board
Rear
Power IC
soldering part
1-6
Fig.3
Fig.4
Page 7
Removing the top cover
(See Fig.5 and 6)
1.
Remove the two screws C and four screws D that
retain the top cover from the rear of the body.
2.
Remove the four screws E retain the top cover from
the two sides of the body.
3.
Remove the top cover from the body by lifting it
toward the rear.
Top cover
MX-K35V
C
DD
Fig.5
Front panel assembly
E
E
Fig.6
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Page 8
MX-K35V
Removing the CD changer unit
(See Fig.7 to 10)
Prior to performing the following procedures,
remove the top cover.
[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.
1.
Disconnect the cassette head wires from the
connectors CN307 and CN308 on the main board,
which is located below the CD changer unit.
2.
Disconnect the microphone amplifier wire from the
connector CN306 on the main board.
3.
Disconnect the card wires from the connectors
CN301, CN302, CN305 and CN606 on the main
board.
4.
Disconnect the parallel wires from the connectors
CN902A, CN902B and CN902C on the power
amplifier board.
5.
From the rear of the set, remove the two screws F
retaining the CD changer unit, then remove the four
screws G retaining the ANTENNA terminal the
AUX IN terminal and LINE OUT terminal.
6.
Push down and disengage the two claws a holding
the CD changer unit at the bottom of its front panel
and then remove the CD changer unit.(See Fig. 10)
CD tray panel
Fig.7
1-8
AUX IN
terminal
G
Fig.9
F
ANTENNA
terminal
CD tray panel
Fig.8
CD changer
unit
Claw a
Fig.10
Page 9
Removing the front panel assembly
(See Fig.11 and 12)
Prior to performing the following procedures,
remove the top cover.
Also remove the CD changer unit.
1.
Disconnect the parallel wire and card wire from the
connectors CN901 and CN903 on the power
amplifier board.
2.
Remove the two screws H retaining the front panel
assembly onto the bottom of the body.
3.
Remove the screw J retaining the cassette deck
mechanism and then remove the GND lug b that
comes from the power amplifier board.
4.
Disengage the claws c on both sides at the bottom
of the front panel assembly and then remove the
assembly.
MX-K35V
H
Fig.11
Claw c
GND lug b
Control/FL board
Power amplifier board
J
Fig.12
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Page 10
MX-K35V
<Disassembly of units and assembly
inside this set>
Removing the main board
(See Fig.13 and 14)
Prior to performing the following procedures,
remove the top cover.
Also remove the CD changer unit.
1.
Disconnect the wires from CN602 and CN603 on
the main board, which is located on the backside of
the CD changer unit.
2.
Disconnect the card wire from connector CN604 of
the main board at the back of the CD changer unit.
3.
The three screws K and screw with washer L retain
the main board should be removed.
4.
Remove the main board by pulling it toward the
side where the CN601 is located.
5.
Using solder, short the CD pickup to connect to
short round.
[Caution] (See Fig.14)
After re-connecting the wires, be sure
to remove the shorting solder from the
GND connection.
K
CN604
CN603CN602
Main board
Fig.13
CN601
K
L
6.
Disconnect the card wire from the connector
CN601 on the main board and then remove the
main board.
Main board
CN601
[Caution]
Short round
Fig.14
1-10
Page 11
Removing the CD changer mechanism
assembly (See Fig.15 to 17)
Prior to performing the following procedures,
remove the top cover.
Also remove the CD changer unit.
1.
Remove the spring d from the front surface of the
CD changer mechanism unit.
2.
Turn the CD changer mechanism unit upside down,
and remove the spring e connecting the unit to the
CD changer mechanism assembly.
[Note] When re-assembling after the disassembly
work, apply bonding agent on the spring to
prevent it from slipping off.
3.
Remove the two screws with the washer M
retaining the CD changer mechanism assembly.
[Caution] When replacing the CD changer
mechanism assembly, be sure not to
mistake the positions of the red and blue
dampers.
MX-K35V
[Note]
Spring d
CD changer
unit
CD changer
mechanism
assembly
M
Fig.15
RedRed
[Note]
Spring e
CD changer
mechanism
assembly
Fig.16
BlueBlue
Fig.17
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Page 12
MX-K35V
Removing the CD pickup (See Fig.18)
Prior to performing the following procedures,
remove the top cover.
Also remove the CD changer unit.
Also remove the CD changer mechanism
assembly.
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 belt
of the CD changer tray (See Fig.19)
Prior to performing the following procedure,
remove the top cover.
1.
Pull out the CD changer tray.
2.
Remove the belt from the pulley.
3.
Remove the two screws N retaining the CD
changer tray loading motor.
[Caution] When pushing in the CD changer tray, be
sure to lower the CD changer mechanism
assembly by manually turning the UD
cam gear in the direction of the arrow.
Replacing the CD tray rotor belt of the
CD changer, and removing the motor
(See Fig.20 and 21)
N
Pulley
Belt
Shaft
CD pickup
gf
Fig.18
UD cam gear
Prior to performing the following procedures,
remove the top cover.
Also remove the CD changer unit.
1.
Remove the two screws P retaining the stopper
brackets on both sides of the CD changer unit.
2.
Remove the stopper brackets from both sides of
the CD changer unit.
3.
Pull out the CD tray from the CD changer unit, all
the way and then lift the tray upward to remove.
4.
Turn the CD tray upside down and remove the tray
rotor belt from the pulley.
5.
Turn the CD tray upside down and disconnect the
card wire from the connector CN605 on the CD
tray rotor motor assembly.
6.
Remove the two screws Q retaining the CD tray
rotor motor, and then remove the CD tray rotor
motor.
CD changer
tray
Fig.19
CD tray
rotor belt
Q
1-12
Stopper bracket
Fig.20Fig.21
P
CN605
Pulley
Q
Page 13
Removing the cassette deck mechanism
(See Fig.22)
Prior to performing the following procedure, remove
the top cover.
Also remove the CD changer unit.
Also remove the front panel assembly.
1.Remove the five screws R retaining the cassette
deck mechanism and then remove the wire clamp
lug h that comes from the back of the front panel
assembly.
MX-K35V
Front panel
assembly
R
Wire clamp
lug "h"
R
Fig.22
Removing the head phone board
(See Fig.23)
Prior to performing the following procedure, remove
the top cover
Also remove the CD changer unit.
Also remove the front panel assembly.
Remove the screw with the washer, S that retains
1.
the head phone board from the back of the front
panel assembly.
Front panel
assembly
Head phone
board
S
Fig.23
1-13
Page 14
MX-K35V
Removing the microphone amplifier
board (See Fig.24 and 25)
Prior to performing the following procedure, remove
the top cover
Also remove the CD changer unit.
Also remove the front panel assembly.
Pull out the mic volume knob from the front of the
1.
front panel assembly.
Remove the screw with the washer, T that retains
2.
the microphone amplifier board.
Front panel assembly
Mic volume knob
Fig.24
Front panel
assembly
Removing the control/FL board
(See Fig.26)
Prior to performing the following procedure, remove
the top cover.
Also remove the CD changer unit.
1.Remove the three screws U that retain the
control/FL board from the back of the front panel
assembly.
Braket
Microphone
amplifier board
T
Fig.25
Front panel
assembly
U
Control/FL
board
1-14
Fig.26
Page 15
Removing the switch board and active
bass ex. switch board
(See Fig.26 to 29)
Prior to performing the following procedures,
remove the top cover.
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 nut and washer retaining the volume
knob shaft.
3.
Remove the three screws U retaining the control/FL
board from the back of the front panel assembly.
4.
Remove the control/FL board.
5.
Remove the eleven screws V retaining the switch
board.
6.
Remove the two screws W retaining the active
bass ex. switch board.
MX-K35V
Front panel assembly
Volume knob
Fig.27
Front panel
assembly
V
W
Nut
Volume
shaft
Washer
Fig.28
Active bass ex. switch board
Switch board
Fig.29
V
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Page 16
MX-K35V
Removing the cassette deck main
motor, and replacing the main belts
(See Fig.22, 30 and 31)
Prior to performing the following procedures,
remove the top cover.
Also remove the CD changer unit.
Also remove the front panel assembly.
1.
Remove the five screws R retaining the cassette
deck mechanism.
2.
Remove the cassette deck mechanism.
3.
Remove the two screws X 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.30
Cassette deck mechanism
(Back side)
X
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 32)
Prior to performing the following procedures,
remove the top cover.
Also remove the CD changer unit.
Also remove the front panel assembly.
1.
Remove the five screws R 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.
Main belt
(For B cassette)
Solder side of leaf switch
Cassette deck mechanism
(Back side)
Main belt
(For A cassette)
Fig.31
Fig.32
1-16
Page 17
MX-K35V
Removing the cassette deck heads
(See Fig.22 and 33)
Prior to performing the following procedures,
remove the top cover.
Also remove the CD changer unit.
Also remove the front panel assembly.
1.
Remove the five screws R 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 Y that retains the head.
5.
Loosen the screw Z that retains the head.
6.
Hold the head and slide it in the direction of the
arrow to remove it.
Removing the Video & CD board
(See Fig.2, 34 to 36)
Prior to performing the following procedures,
remove the top cover.
1.
Disconnect the card wire from connector CN606 on
the main board.
2.
Remove the three screws AA and screw AB
retains the Video & CD board cover.
3.
In order to remove the wire from the Video & CD
board, remove the solder on the power amplifier
board.
4.
Remove the Video & CD board cover.
5.
Remove the two screws AC retains the Video & CD
board.
Cassette deck mechanism
(Front side)
PB headREC/PB head
ZY
Fig.33
ZY
AB
Heat sink
AA
Rear
Power amplifier board
Video & CD
board cover
Solder
Fig.35
CN606
Wire
Fig.34
Video & CD board
AC
Fig.36
1-17
Page 18
MX-K35V
Removing the 3-pin regulator
(See Fig.2, 37 and 38)
Prior to performing the following procedures,
remove the top cover.
1.
Remove the two screws A connecting the heat sink
cover to the rear panel.
2.
Pull the heat sink cover foward you.
3.
Remove the screw AD that retains the bracket
holding the 3-pin terminal regulator.
4.
Remove the solder fixing the 3-pin regulator.
Rear panel
Heat sink
AD
Fig.37
Power amplifier board
Fig.38
Rear
Solder on the
3-pin regulator
1-18
Page 19
MX-K35V
Removing the power amplifier board,
voltage selector board and power
transformer board
(See Fig.2, 3, 37, 39 to 42)
Prior to performing the following procedures,
remove the top cover.
Also remove the CD changer unit.
1.
Remove the two screws A connecting the heat
sink cover to the rear panel.
2.
Pull out the heat sink cover toward you.
3.
Remove the two screws B that retain the bracket
supporting the power IC.
4.
Remove the screw AC that retain the bracket
holding the 3-pin terminal regulator.
5.
Remove the two screws AE that retain the
SPEAKERS terminals.
6.
Remove the screw AF that retains the rear panel,
and then remove the rear panel.
7.
Remove the two screws AG that retain the voltage
selector board.
8.
Disconnect the parallel wires from the connectors
CN951A and CN951B on the power amplifier
board.
9.
Remove the screw AH that retain the power
amplifier board and then remove the assembly.
10.
Remove the solders j connecting the six wires.
11.
Remove the four screws AJ that retain the power
transformer board and then remove the assembly.
Rear panel
Speaker
terminal
AE
AG
Voltage
selector
AF
Fig.39
Rear panel
Power amplifier board
CN951B
CN951A
Power amplifier board
Chassis
AH
Voltage selector
board
AJ
Chassis
(Top view)
j
Fig.40
Chassis
Power transformer
board
AJ
j
Clamp
AC power cord
Fig.41
Fig.42
1-19
Page 20
MX-K35V
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
VT724 : For reference signal test(1kHz)
VT739 : For frequency response test(63Hz,1kHz,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
Standard measurement positions of volume
and switch
Power : Standby (Light STANDBY Indicator)
A.BUSS switch: OFF
Sound mode : OFF
Main VOL. maximum
Travers mecha set position : Disc 1
Mic MIX VOL : MAX
ECHO : OFF
Measurement conditions
Power supply voltage
AC110/127/220/230-240V (50Hz/60Hz) : US/UX
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.
1-20
Page 21
Arrangement of adjusting positions
Cassette deck mechanism
(Front side)
PB Head
(Deck-A)
REC/PB Head
(Deck-B)
MX-K35V
Main board
CN308
8-Pin
L301
FM VT voltage
measurement point
Head azimuth screw
(Forward side)
Head screwHead screw
Head azimuth screw
Tape recorder section
Items
Cassette Head
Azimuth Alignments
Recording Bias
Frequency Alignment
Measurement
conditions
Test tape
: VT703 (10kHz)
Measurement output
terminal
: Headphone Output
(32-ohm loaded)
or
Left and Right
speaker output
(6-ohm loaded)
Recording tape
: TYPE AC-514
Measurement output
terminal
: Erase head terminal
(CN308 8-Pin)
(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.
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.
Antenna coil
Measurement method
AM VT voltage
measurement point
R6
R3
L2
T1
OSC coil
Standard
values
Maximum output
Adjusting
positions
Head azimuth
screw
Adjust the head
azimuth screw only
when the head has
been changed.
80kHz+/-3kHz
Bias coil: L301
Use the HighImpedance Probe for
Frequency counter
input.
Tuner section
Items
AM Tracking
Alignments
AM IFT Alignments
Note: The adjustment of CD section is not required.
Measurement
conditions
Input signal
: 530kHz
Measurement point
: Resistor R3 (AM)
Resistor R6 (FM)
Input signal
: 603kHz
Input signal
: 531kHz
OSC coil adjustment
1.Set the Signal Generator signal to 530KHz 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.
Antenna coil check or adjustment
1.Change the receiving frequency to 603KHz.
2.Adjust the Antenna coil ( L2 ) obtain maximum sensitivity.
(Adjust the SSG output to out of AGC range.)
1. Set the receiving frequency to 531KHz.
2. Feed the 450KHz signal to AM IF input.
3.Adjust the IFT Block T1 obtain to maximum output.
(Adjust the SSG output to out of AGC range.)
Measurement method
Standard
values
V. T
: 1.40V+/-0.05V
Maximum
sensitivity
Maximum output
Adjusting
positions
OSC/Antenna coil
: L2
Adjust the OSC coil
only when the AM coil
block has been
changed.
IFT (T1)
Adjust the IFT only
when the IFT block has
been changed.
1-21
Page 22
MX-K35V
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 pin1
of CN602 is "H"\"L"\"H".
Tracking error waveform at TOC reading
pin 14 of
IC601(TEO)
Approx
1.8V
VREF
Disc states
to rotate
Approx.3sec
Tracking
servo
off states
Automatic measurement
of TE amplitude and
automatic tuning of
TE balance
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
pin9 of IC601 is + 5V?
Confirm that the Focus error
S-cuve signal at the pin 16 of
IC601 is approx.2Vp-p
Confirm the waveform of
the Tracking error signal.
at the pin 14 of IC601 (R617)
(See fig-1)
1-22
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 RFO
Page 23
MX-K35V
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 "Removing the CD pickup" 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.
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.
Power ground
Inverted output for CH1
Supply terminal of output stage for CH1
Non-inverted output for CH1
Input for CH1
Input reference voltage
Output reference voltage
Input for CH2
Non-inverted output for CH2
Supply terminal of output stage for CH2
Inverted output for CH2
Power ground
BIAS
PRE-VSS
Function
OUT 1-
OUT 1+
OUT 2-
OUT 2+
PIN
No.
13
14
15
16
17
18
19
20
21
22
23
24
Symbol
PWGND
OUT(-)3
PVCC3
OUT(+)3
VIN3
SGND
SVCC
VIN4
OUT(+)4
PVCC4
OUT(-)4
PWGND
VSS
IN 2
NF 2
I/O
Power ground
Inverted output for CH3
O
Supply terminal of output stage for CH3
Non-inverted output for CH3
O
Input for CH3
I
Supply terminal of small signal ground
Small signal ground
Input for CH4
I
Non-inverted output for CH4
O
Supply terminal of output stage for CH4
Inverted output for CH4
O
Power ground
-
Function
1-28
Page 29
TA2153FN (IC601) : RF amplifier for digital servo
1. Terminal layout
2. Block diagram
MX-K35V
1
VCC
FNI
FPI
TPI
TNI
MDI
LDO
SEL
TEB
2VRO
TEN
TEO
SBAD
2
3
4
5
6
7
8
9
10
11
12
13
14
15
RFAGC
GMAD
3. Pin function
PIN No.
Symbol
1
VCC
2
RFAGC
3
GMAD
4
FNI
5
FPI
6
TPI
7
TNI
8
MDI
9
LDO
10
SEL
30
RFN2
29
GND
28
RFO
27
AGCIN
26
GVSW
25
RFGO
24
RFRPIN
23
PKC
22
RFCT
21
STC
20
RFRP
19
VRO
18
SEB
17
FEN
16
FEO
I/O
Power supply input terminal
RF amplitude adjustment control signal input terminal. Controlled by 3-PWM signals. (PWM carrier = 88.2kHz)
I
Open loop gain adjustment terminal for AGC amplifier
I
Main beam I-V amplifier input terminal
I
Main beam I-V amplifier input terminal
I
Sub beam I-V amplifier input terminal
I
Sub beam I-V amplifier input terminal
I
Monitor photo diode amplifier input terminal
I
Laser diode amplifier input terminal
O
Laser diode control signal input terminal and APC circuit ON/OFF control sugnal terminal
SEL level APC circuit LDO Detect frequency
GND OFF Connected to Vcc through resistor (1kohm) Low
Hiz ON Control signal output Low
Vcc ON Control signal output High
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
TEB
2VRO
TEN
TEO
SBAD
FEO
FEN
SEB
VRO
RFRP
STC
RFCT
PKC
RFRPIN
RFGO
GVSW
AGCIN
RFO
GND
RFN2
I
Tracking error balance adjustment signal input terminal. Controlled by 3-PWM signals. (PWM carrier = 88.2kHz)
O
Reference voltage (2VRO) output terminal 2RVO = 4.2V when Vcc = 5V
I
TE amplifier negative input terminal
O
TE error signal output terminal
O
Sub beam adder signal output terminal
O
Focus error signal output terminal
I
FE amplifier negative input terminal
I
RFRP output circuit switching terminal
SEL level Bottom detection Peak detection
GND ON ON
Vcc OFF ON
O
Reference signal (VRO) output terminal
O
Track count signal output terminal
I
Time constant adjustment terminal for bottom detection
O
RFRP signal center level output terminal
I
Time constant adjustment terminal for peak detection
I
Input terminal for track count signal output amplifier
O
Output terminal for RF signal amplitude adjustment amplifier
I
Amplifier (AGC, FE, TE) gain switching terminal
GVSW Mode
GND CD-RW
Hiz Normal
Vcc Normal
I
Input terminal for RF signal amplitude adjustment amplifier
(REC/PB)
3NF1INF terminal for playback amp.
4EQ1O Metal output for playback amp.
5PREOUT1O Output terminal for playback amp.
6MIX_OUTO Mixing output
7GND1-Ground
8EQSWIMetal/Normal mode select switch
REC_OUT1
9
O Output for recording amp.
10 REC_NF1INF terminal for recording amp.
11 REC_IN1IInput for recording amp.
12 GND1-Ground terminal
Function
NF2
22
354678
NF1
Ch2
+
+
Ch1
-
Pin
No.
EQ2
EQ1
PREOUT2
202119
PREOUT1
Symbol
A/B_SW
A/B
ref1
V
MIX_OUT
18
VCC
ref
I
GND1
I/O
13 ALCIALC filter terminal
14 REC_IN2IInput for recording amp.
15 REC_NF2INF terminal for recording amp.
16
REC_OUT2
O Output for recording amp.
17 CGO Charge detection terminal
18 VCC-Power supply terminal
19 A/B_SWIREC amp. Select switch (A cassette/B
20 PREOUT2O Output terminal for playback amp.
21 EQ2O Metal output for playback amp.
22 NF2INF terminal for playback amp.
23 CH2_BIInput for playback amp. (Ch2): B cassette
24 CH2_AIInput for playback amp. (Ch2): A cassette
CG
17
ref2
V
M/N
EQSW
cassette)
(REC/PB)
(PB)
REC_OUT2
16
9
REC_OUT1
Ch2
Ch1
REC_NF2
15
-
+
+
-
10
14 REC_IN2
13 ALC
ALC
12 GND
11 REC_IN1
REC_NF1
Function
TA8409S (IC604, IC605) : Motor driver
1. Terminal layout2. Truth table
IN1
123456789
VS
OUT1
VR
IN1
1-30
IN2
VCC
OUT2
NC
GND
INPUT OUTPUT MODE
IN2
OUT1
0
0
1
0
0
1
1
1
OUT2
H
L
L
L
H
L
MOTOR
STOP
CW/CCW
CCW/CW
BRAKE
Page 31
TA2104N (IC1) : 1chip AM/FM, MPX tuner system
1. Terminal layout2. Pin function
RFGND
FM_RFIN
AM_FIL
MIX_OUT
VCC
AM_IFIN
FM_IFIN
GND
AGC
QUAD
R_OUT
L_OUT
10
11
12
PIN
Symbol
1
2
3
4
5
6
7
8
9
24
FM_RFOUT
23
RFVCC
22
AM_RFIN
21
FM_OSC
20
AM_OSC
19
OSC_OUT
18
ST_IND
17
IF_REQ
16
DET_OUT
15
MPX_IN
14
LPF2/M_ST
13
LPF1/BAND
No.
1
2
3
4
5
6
7
8
9
10
11
RFGND
FM_RFIN
AM_FIL
MIX_OUT
AM_IFIN
FM_IFIN
R_OUT
12
VCC
GND
AGC
QUAD
L_OUT
I/O
I
I
O
I
I
I
I
O
O
Function
Ground terminal for RF
Input of FMRF signal
AM low frequency cut
Output of FM/AM RF mix
Power supply terminal
Input of AMIF signal
Input of FMIF signal
Ground terminal
AGC voltage input terminal
OSC terminal for FM DET.
Output R-channel
Output L-channel
TC9257P (IC2) : PLL frequency synthesizer
1. Terminal layout
1
XT
2
XT
DATA
OT-1
OT-2
OT-3
OT-4
3
4
5
6
7
8
9
10
PERIOD
CLOCK
I/O-5 / CLK
20
DO2
19
DO1
18
I/O-7
17
I/O-8 / NF1
16
I/O-9 / NF2
15
GND
14
FMIN
13
AMIN
12
VDD
11
I/O-6
2. Pin function
PIN
Symbol
No.
1
XT
2
XT
3
PERIOD
4
CLOCK
5
DATA
6
OT-1
7
OT-2
8
OT-3
9
OT-4
10
I/O-5/CLK
11
I/O-6
12
VDD
I/O
Crystal oscillator pins
I
Crystal oscillator pins
O
Period signal input
I
Clock signal input
I
Serial data input/output
I/O
General-purpose output port
O
General-purpose output port
O
General-purpose output port
O
General-purpose output port
O
General-purpose I/O port
I/O
General-purpose I/O port
I/O
Power supply pin
-
PIN
Symbol I/OFunction
No.
13
LPF1/BAND
14
LPF2/M_ST
15
MPX_IN
16
DET_OUT
17
IF_REQ
18
ST_IND
19
OSC_OUT
20
AM_OSC
21
FM_OSC
22
AM_RFIN
23
RFVCC
24
FM_RFOUT
FunctionFunction
PIN
No.
13
14
15
16
I
FM/AM switch
I
Stereo/monoral switch
I
Multiplex signal input
O
AM/FM detection output
O
IF out/REQ out
O
Stereo indicator output
O
PLL data bus for FM or AM
-
AM local oscillation circuit
-
FM local oscillation circuit
I
Input of AMRF signal
-
Power supply teminal for RF
O
Output of FMRF signal
Symbol I/O
AMIN
FMIN
GND
I/O-9
I/O
NF2
Programmable counter input
I
Programmable counter input
I
Ground pin
-
General-purpose I/O port
General-purpose counter frequency
I
measurement input
17
I/O-8
NF1
General-purpose I/O port
I/O
General-purpose counter frequency
I
measurement input
18
19
20
I/O-7
DO1
DO2
General-purpose I/O port
I/O
Phase comparator output
O
Phase comparator output
O
MX-K35V
3. Block diagram
AMP
FMIN
14
AMIN
13
XT
2
XT
1
DATA
5
CLOCK
4
PERIOD
3
FM
L
1/2
FMHHF
OSC
CIRCUIT
2 MODULUS
PRESCALER
FM MODE LF
OSC
1ms
ADDRESS
DECODER
OUTPUT PORT
OT-1
OT-2
PSC
4bit SWALLOW
COUNTER
12bit PROGRAMMABLE COUNTER
4
REFERENCE COUNTER
24bit REGISTER
24bit SHIFT REGISTER
4
TEST
24bit REGISTER
44
UNIVERSAL COUNTER CONTROL
OT-4
9876
OT-3
OT-4
POWER ON
RESET
12
15
2422
20bit BINARY COUNTER
XT
5
10
1ms
VDD
12
MAX
4
RESET
PHASE
COMPARATOR
UNLOCK
5
GATE
GND
15
TRI-STATE
BUFFER
TRI-STATE
BUFFER
OT4
I/O PORT
AMP
AMP
19
20
10
11
16
17
18
DO1
DO2
I/O-5/CLK
I/O-6
I/O-9/NF2
I/O-8/NF1
I/O-7
1-31
Page 32
MX-K35V
TC9462F (IC602) : Digital servo single chip processor
1. Terminal layout
80 51
50
100 81
2. Pin function
1
TEST0
2
HSO
3
UHSO
4
EMPH
5
LRCK
6
VSS
7
BCK
8
AOUT
9
DOUT
10
MBOV
11
12
13
14
15
16
17
18
19
20
21
22
IPF
SBOK
CLCK
VDD
VSS
DATA
SFSY
SBSY
SPCK
SPDA
COFS
MONIT
31
30
1
Pin No.Function
Test mode terminal. Normally, keep at open
I
Playback speed mode flag output terminal.
O
UHSO HSO PLAYBACK SPEED
O
23
24
H H Normal
H L 2 times
L H 4 times
L L -
Subcode Q data emphasis flag output terminal.
O
25
26
27
28
Emphasis ON at "H" level and OFF at "L" level.
The output polarity can invert by command.
Channel clock output terminal. (44.1kHz)
O
L-ch at "L" level and R-ch at "H" level. The
29
30
output polarity can invert by command.
Digital ground terminal.
Bit clock output terminal. (1.4112MHz)
O
Audio data output terminal.
O
Digital data output terminal.
O
Buffer memory over signal output terminal.
O
Over at "H" level.
Correction flag output terminal.
O
At "H" level, AOUT output is made to correction
impossibility by C
O
Subcode Q data CRCC check adjusting result
2
correction processing.
output terminal. The adjusting result is OK at
"H" level.
I/O
Subcode P
W data readout clock input/output
terminal. This terminal can select by command
bit.
-
Digital power supply voltage terminal.
-
Digital ground terminal.
O
Subcode P
O
Playback frame sync signal output terminal.
O
Subcode block sync signal output terminal.
O
Processor status signal readout clock output
W data output terminal.
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
terminal.
O
Processor status signal output terminal.
O
Correction frame clock output terminal.
(7.35kHz)
O
Internal signal (DSP internal flag and PLL
clock) output terminal. Selected by command.
This terminal output the text data with serial
46
47
48
49
50
by command.
SymbolI /OPin No.SymbolI / OFunction
VDD
TESIO0
P2VREF
HSSW
ZDET
PDO
TMAXS
TMAX
LPFN
LPFO
PVREF
VCOREF
VCOF
AVSS
SLCO
RFI
AVDD
REFCT
RFZI
RFRP
FEI
SBAD
TSIN
TEI
TEZI
FDO
TRO
VREF
Digital power supply voltage terminal.
Test input/output terminal. Normally, keep at
I
"L" level. The terminal that inputted the clock
for read of text data by command.
PLL double reference voltage supply terminal.
2/4 times speed at "V
O
O
1 bit DA converter zero detect flag output
REF
" voltage.
terminal.
Phase difference signal output terminal of
O
EFM signal and PLCK signal.
TMAX detection result output terminal.
O
Selected by command bit (TMPS).
TMAX detection result output terminal.
O
Selected by command bit (TMPS).
DIFFERENCE RESULT TMAX OUTPUT
Longer than fixed freq. "P2V
REF
"
Shorter than fixed freq. "Vss"
Within the fixed freq. "HiZ"
LPF amplifier inverting input terminal for PLL.
I
LPF amplifier output terminal for PLL.
O
PLL reference voltage supply terminal.
VCO center frequency reference level terminal.
I
Normally, keep at "PV
O
VCO filter terminal.
-
Analog ground terminal.
O
Data slice level output terminal.
I
RF signal input terminal.
-
Analog power supply voltage terminal.
I
RFRP signal center level input terminal.
I
RFRP zero cross input terminal.
I
RF ripple signal input terminal.
I
Focus error signal input terminal.
I
Sub-beam adder signal input terminal.
I
Test input terminal. Normally, keep at "V
REF
" level.
REF
"
level.
I
Tracking error signal input terminal.
Take in at tracking servo on.
I
Tracking error zero cross input terminal.
O
Focus servo equalizer output terminal.
O
Tracking servo equalizer output terminal.
-
Analog reference voltage supply terminal.
1-32
Page 33
MX-K35V
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
RFGC
TEBC
FMO
FVO
DMO
2VREF
SEL
FLGA
FLGB
FLGC
FLGD
VDD
VSS
IO0
IO1
IO2
IO3
DMOUT
CKSE
DACT
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
SymbolI /OPin No.SymbolI / OFunction
TESIN
TESIO1
VSS
PXI
PXO
VDD
XVSS
XI
XO
XVDD
DVSR
RO
DVDD
DVR
LO
DVSL
TEST1
TEST2
TEST3
BUS0
BUS1
BUS2
BUS3
VDD
VSS
BUCK
CCE
TEST4
TSMOD
RST
Pin No.Function
RF amplitude adjustment control signal output
O
terminal.
Tracking balance control signal output terminal.
O
Feed equalizer output terminal.
O
Speed error signal or feed search equlizer
O
output terminal.
Disk equalizer output terminal. (PWM carrier=
O
88.2kHz for DSP, Synchronize to PXO)
Analog double reference voltage supply
terminal.
APC circuit ON/OFF indication signal output
O
terminal. At the laser on time, UHF = L at "HiZ"
level and UHF = H at "H" level.
Extermal flag output terminal for internal
O
signal. Can select signal from TEZC, FOON,
FOK and RFZC by command.
Extermal flag output terminal for internal
O
signal. Can select signal from DFCT, FOON,
FMON and RFZC by command.
Extermal flag output terminal for internal
O
signal. Can select signal from TRON, TRSR,
FOK and SRCH by command.
Extermal flag output terminal for internal
O
signal. Can select signal from TRON, DMON,
HYS and SHC by command.
Digital power supply voltage terminal.
Digital ground terminal.
General I/O terminal. Can change over input
I/O
port or output port by command. At the input
I/O
mode time can readout a state of terminal (H/L)
I/O
by read command. At the output mode time can
I/O
control a state of terminal (H/L/HiZ) by
command.
This terminal controls IO0
I
At "L" level time, IO0, 1 out feed equalizer
signal of 2-state PWM, IO2,3 out disk equalizer
signal of 2-state PWM.