Safety Instructions - Akai AC-220 Service Manual

SAFETY INSTRUCTIONS
PRECAUTIONS DURING SERVICING
1. Parts identified by the
& (
* ) symbol parts are
critical for safety. Replace them only with parts
whose numbers are 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 specified
replacements. .
Examples: RF converters, tuner units, antenna selection
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) Insulating Tape
2) PVC tubing
3) Spacers (insulating barriers)
4) Insulating sheets for transistors
5) Plastic screws for fixing micro switches
5. When replacing AC primary side components
(transformers, power cords, noise blocking capacitor,
etc.), wrap ends of wires securely about the terminals
before soldering.
c::) C)
6. Make sure that wires do not contact heat generating
parts (heat sinks, oxide metal film resistors, fusible
resistors, etc.)
7. Check if replaced wires do not contact sharply edged
or pointed parts.
8. Also check areas surrounding repaired parts.
9. Make sure that foreign objects (screws, solder droplets,
etc.) do not remain inside the set.
MAKE YOUR CONTRIBUTION TO PROTECT THE
ENVIRONMENT
Used batteries with the ISO symbol for
recycling as well as small accumulators
(rechargeable batteries), mini-batteries
(cells) and starter batteries should not
be thrown into the garbage can.
Please leave them at an appropriate depot.
SAFETY CHECK AFTER SERVICING
After servicing, make measurements of leakage-current
or resistance in order to check if 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 resister
of 1500 ohm paralleled with a 0.15
µ
F capacitor, under
the unit's normal working condition.
The leakage-current should be less the 0.SmA rms AC.
The resistance measurement should be done between
accessible exposed metal parts and power cord plug
prongs with the power switch "ON" (if included). The
2
resistance should be more than 2.2Mohms.
PRECAUTIONS IN REPAIRING
When repairing or adjusting 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 objects between
the P.C board or the mecha parts and the base.
3. The Micro-Computer and the CD signal processing
ICs may 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.
GND
4. Do not loosen any screws in the pick-up block.
Please refer 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 model for some countries. laser warning labels
are affixed on and inside of the unit as shown below.
For your safety, read these labels carefully before
repairing or adjusting the unit.
CAUTION
The use of controls or adjustments or the performance
of procedures other than those specified herein may
result in hazardous radiation.
[ EUROPE, SCANDINAVIA, UK and AUSTRALIA ]
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:
INVISIBLE LASER RADIATION WHEN OPEN
AND INTERLOCK DEFEATED.AVOID EXPOSURET08EAM
AOVARSEL
USYNUG LASERSTRAUNG VED l>e,.
NING SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION
UNDGAUDIETTELSE FOR STRALING
VARO
AVATTAESSA JA SUOJALUKITUS OHiTET·
T AESSA OLET AL TTIINA NAKYMi\ TTOMALLA l.ASERSATE•
LYLLE
>tA KA TSO SAT€ESEEN'
VARNING:
OSYNLIG LASERSTRALNING NAA DENNA
DEL AA <iPPNAD OCH SPIIRREN AR URKOPPLAD
BETRAKTA EJ STRAI..EN!
Label affixed on the CD MECHA BLOCK
I