Page 1
MX-J100
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 e xposed
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.).
W arning
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
!
CAUTION Burrs formed during molding may be left over on some parts of the chassi\
s. Therefore,
pay attention to such burrs in the case of preforming repair of this sys\
tem.
1-2
Page 2
MX-J100
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 laser
radiation and is equipped with safety switches which
prevent 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.
CAUTION Please use enough caution not to
see the beam directly or touch it
in case of an adjustment or operation
check.
Page 27
MX-J100
1-28
KS9286B (IC928) : DSP/D-A Converter
26 32 33
30
111214
77678024
17
22
373836
6968
8
9
7273757670
42
53
66
19 20 7
29
65 63 62 61
EFMI
CNTVOL
DPFIN
DPFOUT
DPDO
SMEF
SMON
SMDP
SMSD
LOCK
XOUT
XIN
MDAT
MCK
MLT
TRCNT
/ISTATLRCHO
ADATAO
BCKO
BCKI
ADATAI
LRCHI
EMPH
VREFL1
VREFH1
XTALSEL TESTO
CDROM
TEST1 DATX RCHOUT LCHOUT
S0S1 SBCKSDAT
SUBCODE
SYNC
DETECTORSUBCODE
OUTPUTSUBCODE-Q
REGISTER
EFM
PHASE
DETECTOR
FRAME SYNC
DETECTOR
PROTECTOR
INSERTEREFM
DEMODULATOR SQDT
SQCK
DIGITAL
PLL
DIGITAL
CLV
SERVO23BIT
SHIFT
REGISTER
X-TAL
TIMING
GENERATOR
CPU
INTERFACETRACK
COUNTER
MODE
SELECTORDIGITAL
OUTPUTADDRESS
GENERATOR
16K
SRAM
ECC
INTERPOLATOR
DIGITAL
FILTER
& DE-EMPH
D/A
CONVERTER
8BIT DATA BUS
Page 36
MX-J100
3-7
1
1
6
7
8 8
7
6
2 4
11 11
12
12
9
3 5
15
13
10
5
14
14
Cassette mechanism assembly and parts list
Block No.
AB C 12 3
Item Parts numberParts name Area A
Parts list
Q'ty Description
Block No. M4MM
1 AH81-00141A R/P HEAD 2 TC881CB
2 AH81-00142A C.MOTOR ASS'Y 1 ADR2400-SHU2L
3 AH81-00143A MAIN BELT 1 1 ADR2400-MAIN76.
4 AH81-00144A MAIN BELT 2 1 ADR2400-MAIN64.
5 AH81-00101A SUB BELT 2 ADR2400-FR34.7
6 AH81-00102A SOLENOIDE 2 ADR2400-1
7 AH81-00282A SPRING 2
8 AH81-00283A PINCH LOLLER 2 ASS'Y PARTS
9 AH81-00284A E-HEAD 1 TC2131F
10 AH81-00285A MOTOR BRACKET 1
11 AH81-00286A LEAF SWITCH 2 ADR2400-MODE
12 AH81-00287APHOTO SENSOR 2 ADR2400-SENSOR
13 AH81-00288ACONNECTOR 1 ADR2400-16
14 AH81-00289A LEAF SWITCH 6 ADR2400-MXS0022
15 AH81-00290A P.C.BOARD 1
(Cassette mechanism)