Akai TX-500 - Page 3

% SAFETY INSTRUCTIONS
PRECAUTIONS DURING SERVICING
1. Parts identified by the A symbol are critical for safety.
Replace them only with the parts number specified.
2. In addition to safety, other parts and assemblies are
specified for conformance with such regulations as those
applying to spurious radiation.
These must also be replaced only with the specified
replacements.
Examples : RF converters, tuner units, antenna selector
switches, RF cables, noise blocking capacitors,
noise blocking filters, etc.
3. Use specified internal wiring. Note especially :
1) Wires covered with PVC tubing
2) Double insulated wires
3) High voltage leads
4. Use specified insulating materials for hazardous live parts.
Note especially :
1) Insulation Tape
2) PVC tubing
3) Spacers (insulating barriers)
4) Insulation sheets for transistors
5) Plastic screws for fixing micro switches
5. When replacing AC primary side components (trans-
formers, power cords, noise blocking capacitors, etc.),
wrap the ends of the wires securely around the terminals
before soldering.
Be ho I~
6. Make sure that wires do not contact heat producing parts
(heat sinks, oxide metal film resistors, fusible resistors,
etc.).
7. Check that replaced wires do not contact sharp edged or
pointed parts.
8. Also check areas surrounding repaired locations.
9. Make sure that foreign objects (screws, solder droplets,
etc.) do not remain inside the set.
SAFETY CHECK AFTER SERVICING
After servicing, make measurements of leakage-current or
resistance in order to determine that exposed parts are
acceptably insulated from the supply circuit. The leakage-
current measurement should be done between accessible
metal parts (such as chassis, ground terminal, microphone
jacks, signal input/output connectors, etc.) and the earth
ground through a resistor of 1500 ohms paralleled with a
0.15 uF capacitor, under the unit's normal working conditions.
The leakage-current should be less than 0.5 mA rms AC.
The resistance measurement should be done between
accessible exposed metal parts and power cord plug prongs
with the power switch (if included) “ON”. The resistance
should be more than 2.2 M ohms.
SERVICE MANUAL
MAKE YOUR CONTRIBUTION TO PROTECT
THE ENVIRONMENT
Used batteries with the ISO symbol for recycling as
well as small accumulators (rechargeable batteries), LAY
mini-batteries (cells) and starter batteries should &
not be thrown into the garbage can.
Please leave them at an appropriate depot.
PRECAUTIONS IN REPAIRING
When repairing or adjusing the unit, please note the following
points.
1. Do not put excessive pressure on the mechanical part
(operation part), including the pick-up block, as extremely
high mechanical precision is required in these parts.
2. When the base is removed for repair or adjustment, make
sure that there are no metal obiects in the narrow gap
between the P.C. board or the mecha parts and the base.
3. The Micro-Computer and the CD signal processing ICs
can be damaged by static electricity or leakage from a
soldering iron during repairing. While soldering, please
take the precautions against leakage as in the illustration.
7
4. Do not loosen any screws in the pick-up block.
When handling the pick-up block, please refer to the
points to NOTE when replacing the pick up block.
5. To avoid hazardous invisible Laser Radiation, DO NOT
look at the Laser Beam (Objective lens) directly.
6. On models for some countries, laser warning labels are
affixed on the unit and inside of the unit, as shown below.
For your safety, read these labels carefully when repairing
or adjusting the unit.
CLASS 1. LASER PRODUCT
KLASSE 1 LASER PRODUKT
LUOKAN 1 LASER LAITE
KLASS 1 LASER APPARAT
Label affixed on the rear panel of the unit.
CAUTION : invisi8Lé LASER RADIATION WHEN OPEN
AND INTEALOCKS DEFEATED AVOID EXPOSURE TOBE AM.
ADVARSEL : usvNuG LASEASTAAUNG VED AB
NING NAR SIKKERHEOSAFBRYDERE ER LICE AF FUNKTION
UNOGA UDS4 TTELSE FOR STRALING.
VARO = AvATTAESSA JA SUOJALUXITUS OHITET
TAESSA OL ET ALT THNA NAKS MATT OMALLE LASEASATED
LYLLE.
ALK KATSO SATEESEEN +
VARNING : OsyNUG LASERSTRALNING NAR DENNA
DEL AR OPPNAD OCH SPARREN AR URKOPPLAC.
BETRAKTA Et STRALEN :
Label affixed on the left side of the CD PLAYER BLOCK of
the unit.