Akai CD-57 - Precautions During Servicing; Safety Check after Servicing

*& SAFETY INSTRUCTIONS
PRECAUTIONS DURING SERVICING
1. Parts indentified by the “\ () symbol are critical for
safety. Replace only with 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 specified re-
placements.
Examples: RF converters, tuner units, antenna selec-
tor 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 microswitch (especially in
turntable)
5. When replacing AC primary side components (trans-
formers, power cords, noise blocking capacitors, etc.),
wrap ends of wires securely about the terminals before
soldering.
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6. Observe that wires do not contact heat producing parts
(heatsinks, oxide metal film resistors, fusible resistors,
etc.).
7. Check that replaced wires do not contact sharp edged
or pointed parts.
. Also check areas surrounding repaired locations.
9. Use care that foreign objects (screws, solder droplets,
etc.) do not remain inside the set.
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nn ennnnne—— SERVICE MANUAL
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 be-
tween accessible metal parts (such as chassis, ground
terminal, microphone jacks, signal input / output connec-
tors, etc.) and the earth ground through a resister 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 metalparts and power cord plug prongs
with the power switch (if included) “ON”. The resistance
should be more than 2.2 Mohms.
MAKE YOUR CONTRIBUTION TO PRO-
TECT THE ENVIRONMENT
Used batteries with the ISO symbol for recy-
cling as well as small accumulators (recharge- &&
able batteries), mini-batteries (cells) and starter
batteries should not be thrown into the garbage can.
Please leave them at an appropriate depot. All other
household batteries can be thrown out with the household
waste.
CLASS 1 LASER PRODUCT
This product contains a low power laser device.
To ensure continued safety, do not remove any covers
or attempt to gain access to the inside of the product.
Refer any servicing to qualified personnel.
Use actual size stickers
CLASS 1. LASER PRODUCT
KLASSE 1 LASER PRODUKT
LUOKAN 1 LASER LAITE
KLASS 1 LASER APPARAT
CAUTION ; srvigss LASER RADIATION WHEN OPEN
ANO INTERLOCXS DEFEATED AVOIO EXPOSURE TO BEAM,
ADVARSEL ; usynuG LASERSTRAUNG VED AB
NING NAR SIKKERHEDSAFBRYDERE ER UDE AF FUNKTION
UNDGA U0G/ETTELSE FOR STRALING.
VARO |; AVATTAESSA JA SUQJALLAUTUS _OHNTET-
TAESSA OLET ALTTWNA MAKYMATTOMALLE LASERSATED
LYLLE.
ALA KATSO SATEESEEN !
VARNING , osynua A MAR DENMA
LASERSTRALIONG
DEL AR OPPMAD OCH SPAREN AR URKOPPLAD.
GETRAKTA EJ STRALEN !