Page 1
MX-J150R
1-2
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 current 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 measure 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.).
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.
Good earth groundPlace this
probe on
each exposed
metal part. AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
1500 10W
0.15 F AC TYPE
!
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.
Page 2
MX-J150R
1-3
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 OF LABELS
! CAUTION Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
CLASSIFICATION LABEL, PLACED ON REAR ENCLOSURE WARNING LABEL, PLACED INSIDE THE UNIT
CLASS 1
LASER PRODUCT
DANGER: Invisible laser
radiation when open and
interlock failed or defeated.
AVOID DIRECT EXPOSURE
TO BEAM. (e) ADVARSEL: Usynlig laser-
stråling ved åbning, når
sikkerhedsafbrydere er ude
af funktion. Undgå udsæt-
telse for stråling (d) VARNING: Osynlig laser-
strålning när denna del är
öppnad och spärren är
urkopplad. Betrakta ej
strålen. (s)VARO: Avattaessa ja suo-
jalukitus ohitettaessa olet
alttiina näkymättömälle
lasersäteilylle. Älä katso
säteeseen. (f)
Page 5
MX-J150R
1-6Prior to performing the following procedure, remove
the top cover and the side covers.
Press the POWER button. Press the OPEN/CLOSE
button to eject the CD tray.
Move the CD tray fitting upward and release the joint
b.
Press the OPEN/CLOSE button to insert the CD tray. 1.
2.
3.
Removing the CD tray fitting
(See Fig.4 to 6)
Be sure to remove the CD tray fitting
before removing the CD changer unit. ATTENTION:
Turn the black loading pulley gear marked c from the
back of the CD changer unit as shown in Fig.7 and
draw the CD tray toward the front.
Move the CD tray fitting upward and release the joint
b.
Push and insert the CD tray manually. 1.
2.
3.
Removing the CD tray fitting
(See Fig.5 to 7)
- How to eject the CD tray without turning on power -
Fig.4
Fig.5
Fig.6 Fig.7
POWER button
OPEN/CLOSE button CD tray
Joint b
Joint b
CD tray fitting
CD tray
Marked c
Loading pulley gear
Page 19
MX-J150R
1-20
FM THD Adjustment
Output
Output 28 dB( ±2dB)
60 dB
Minimum Distortion (0.3% below)
(Figure 1-1) SSG FREQ.
Adjustment
point
(TL3)98 MHz
FM DETECTOR COIL
FM Search Level Adjustment
Adjust TSR1 so that TUNED of FL T
is lighted (Figure 1-2)
Figure1-2 FM Auto Search Level Adjustment *Adjust FM S.S.G level to 28dBFigure1-1 IF CENTER and THD Adjustment
SSG FREQ.
Adjustment
point
(TSR1)98 MHz
BEACON
SENSITIVITY
SEMI-VR(20K½)
FM S.S.GGND28 dB FM S.S.GOutput
GND
Speaker
TerminalFM
Antenna
Terminal
Distortion MeterInput SET
Input outputOscilloscope
FM IN FM Antenna
SET
20 k½
OUTPUT
AM SSG
450KHZ
INPUT
AM ANT
IN
Speaker Terminal 60cm
TL2
VTVM Oscilloscope
AM(MW) I.F Adjustment
Maximum output (Figure 1-3) SSG FREQ.
Frequency
Adjustment
point
(TL2)450 kHz
520 kHz
AM I.F COIL
Figure1-3 AM I.F Adjustment
OUTPUT