SERVICE MANUAL
No.21033
Nov. 2001
COPYRIGHT
2001 VICTOR COMPANY OF JAPAN, LTD.
MX-K35V
MX-K35V
COMPACT COMPONENT SYSTEM
Area suffix
US ---------------------- Singapore
UX ------------------- Saudi Arabia
Contents
Safety precautions
Preventing static electricity
Important for laser products
Disassembly method
Adjustment method
Flow of functional operation
until TOC read
1-2
1-3
1-4
1-5
1-20
1-22
1-23
1-23
1-24
1-35
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
Wiring connections
ACTIVE
BASS EX.
PHONES
REPEAT
PROGRAM
RANDOM
/STOP
REC START
DUBBING
REC START
CD
CLOCK
/TIMER
TAPE
A/B
DISC SKIP
EJECT
PLAY
A
REC/PLAY
B
CD CONTROL
C
D
1
C
D
2
C
D
3
CD-R/RW PLAYBACK
FULL - LOGIC CONTROL
CD SYNCHRO RECORDING
EJECT
R
O
C
K
CLASSIC
P
O
P
V
O
LU
ME
SOUND
MODE
MAX
MIN
MIC
RM-SMXK35V REMOTE CONTROL
1
2
3
4
5
6
7
8
9
10
+10
FM MODE FM /AM
AUX
SLEEP
STANDBY/ON
SOUND
MODE
KARAOKE
RETURN
STILL
NEXT V.INTRO HIGHLIGHT
PREV.
ON SCREEN
KEY CONTROL
MPX
ACTIVE
BASS EX.
FADE
MUTING
ECHO
VOLUME
PROGRAM
/RANDOM
REPEAT
TAPE A/B TAPE
A
U
X
F
M/AM
C
D
T
A
P
E
1 BIT DUAL D/A
CONVERTER
COMPACT COMPONENT SYSTEM
MX-K35V
STANDBY/ON
STANDBY
SELECT
VCD NUMBER
TUNING
KEY CONTROL
RETURN
PBC
MIC LEVEL
CANCEL
SET
PRESET
PREV
NEXT
3-CD
PLAY & EXCHANGE
NTSC/PAL
COMPATIBILITY
CD
1
CD
2
CD
3 CD
SELECT
CA-MXK35V
SP-MXK35V
SP-MXK35V
MX-K35V
1-2
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.).
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.
Good earth ground
Place this
probe on
each exposed
metal part.
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500
10W
0.15 F AC TYPE
!
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.)
MX-K35V
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.
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
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.1
CD changer
mechanism
assembly
CD changer
unit
Fig.2
Soldering
Conductive material
(conductive sheet) or iron plate
(caption)
Anti-static wrist strap
MX-K35V
1-4
CLASS 1
LASER PRODUCT
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
to function.
6.CAUTION : Use of controls, adjustments or performance of
procedures other than those specified herein may result in
hazardous radiation exposure.
VARNING : Osynlig laserstrålning är denna del är öppnad
och spårren är urkopplad. Betrakta ej strålen.
VARO
: Avattaessa ja suojalukitus ohitettaessa olet
alttiina näkymättömälle lasersäteilylle.Älä katso
säteeseen.
ADVARSEL : Usynlig laserstråling ved åbning , når
sikkerhedsafbrydere er ude af funktion. Undgå
udsættelse for stråling.
ADVARSEL : Usynlig laserstråling ved åpning,når
sikkerhetsbryteren er avslott. unngå utsettelse
for stråling.
REPRODUCTION AND POSITION OF LABELS
WARNING LABEL
! CAUTION Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
ADVARSEL: Usynlig laser-
stråling ved åbning, når
sikkerhedsafbrydere er ude
af funktion. Undgåudsæt-
telse for stråling
(d)
VARNING: Osynlig laser-
strålning när denna del är
öppnad och spärren är
urkopplad.
Betrakta
ej
strålen.
(s)
DANGER: Invisible laser
radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE
TO BEAM.
(e)
VARO: Avattaessa ja suo-
jalukitus ohitettaessa olet
alttiina
näkymättömälle
lasersäteilylle. Älä katso
säteeseen.
(f)
MX-K35V
1-5
Disassembly method
Top cover
1-7
CD changer unit
1-8
Front panel assembly
1-9
Chassis unit
1-17
CD changer unit
1-8
Removing the main board
1-10
Removing the CD changer mechanism assembly
1-11
Removing the CD pickup
1-12
Replacing the loading motor and belt of the CD changer tray
1-12
Replacing the CD tray rotor belt of the CD changer, and removing the motor
1-12
Front panel assembly
1-9
Removing the cassette deck mechanism
1-13
Removing the head phone board
1-13
Removing the microphone amplifier board
1-14
Removing the control/FL board
1-14
Removing the switch board and active bass ex. switch board
1-15
Removing the cassette deck main motor, and replacing the main belts
1-16
Removing the leaf switches of the cassette deck mechanism
1-16
Removing the cassette deck heads
1-17
Chassis unit
1-17
Removing the Video & CD board
1-17
Removing the 3-pin regulator
1-18
Removing the power amplifier board, voltage selector board
and power transformer board
1-19
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
1-6