Safety Instructions - Akai MPC3000 Service Manual

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SAFETY INSTRUCTIONS
PRECAU TI ONS DURING SERVICING
1. Parts identified by the & (*) symbol are critical for
safety. Replace them only with the parts number specified .
2. In addition to safety, other parts and assemblies are
spec ified 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 blocki ng filters, etc.
3. Use specified internal wiring . Note espec ially :
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 A C primary side components
(transformers, power cords, noise blocking capacitors ,
etc.). wrap the ends of the wires securely around the
terminals befo re soldering .
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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 su re that foreign objects (screws, solder droplets,
etc .) do not remain inside the set.
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INFORMATIONS
SYMBOLS FOR PR IMARY DESTINATI ON
Unit destinations are indicated with lette rs as shown below.
Symbols
Principal Destinations
I A I
U.S.A
I BI U.K
[TI
Canada
m
Europe (except U.K)
w
Japan
w
Australia
[Y]
Germany
@]
Universal Area
rn
Custom version
SAFETY CHECK AFTER SERV ICING
After servicing, make measurements of leakage-cu rrent
or resistance in order to determ ine that exposed parts
are acceptably insulated from the supply circuit.
The leakage-current measurement shou ld be done be-
tween accessible metal parts (s uch as chassis, ground
t~rminal, microphone jacks, signal input/output connectors,
etc .) and the earth ground through a resistor of 1500
ohms paralleled with a 0. 15 µF 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 be twee n
accessible exp osed metal parts and power cord plug
prongs with the power sw itch (if included) "ON" . The
resistance should be more than 2.2 M ohms .
PRECAUTION FOR LITHIUM BATT.E RV
The lithium battery may explode when heated excessively.
[OBSERVE THE FOLLOWING WHEN REPLAC IN G]
• Replace with the same make and type only.
• Use solder ing iron in "recommended way " only.
• Place battery in correct polarity.
• Do not short the terminals .
• Do not charde battery.
• Do not dispose of battery in fire .
[DANGER] [RECOMMENDED WAY]
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