Aiwa AD-R450 - service, Service Manual, Page: 2 / 21

Follow the instructions carefully, which w ill allow the user to optimise the products' performance
and give many years o f serivce.
1. No scratch and m elting shall be made to covered tead-wires o f an
a.c. prim ary c irc u it including mains leads.
2.
No ille g ib ility shall be given to the specification plate, the cau­
tio n labels, the fuse labels and others.
3. When, on pattern sides o f circ u it boards, additional repair-parts
have been made up, the parts shall be firm ly glued to circ u it
boards or other components, unless the parts can be attached
firm ly .
4. The fo llo w in g m atters shall be m aintained as they are, when
repairing.
1) Soldering of lead-wire ends
* Care should be taken of the space distance in an a.c. pri­
mary circuit as well as soldering.
2) Wiring and holding of lead-wires with wire-clips and binders
3) Materials of lead-wires
*e.g.; For U L models, lead-wires to be used shall be ap­
proved or accepted by the UL.
4) Location of all kinds of insulators
5) Setting 6f voltage selector switch
* S e t the Voltage Selector Switch to 240V, 220V, or 120V,
According to your Local Voltage.
5. A fte r repaired, the insulation resistance o r leakage current shall
be measured w ith 5 0 0 ± 5 V D.C and shall be n o t less than 1Mi2.
M easuring Point
Connect to C h assis or Outside 0 of Pin Ja c k
Rating : More than 1M Q /5 0 0 V DC Pin J a c k ( 0 )
/
C
D
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I vir
Chassis ( G ) II
AC Po w er C o r d ( @ )
6. General instructions fo r mechanism repair
1) The heads, capstan and pinch roller shall be cleaned of good
quality alcohol after repaired, because dirty heads shall cause
distorted sounds while dirty capstan and pinch roller shall
occur wow/flutter and take-up fault.
2) When oiling, only one or two drops shall be applied so as
not to run over and be dispersed. Note should be taken of the
metal fitting for the capstan and rotating portions of the
idlers and pinch roller, especially.
3) E-rings and poly slider washers shall be replaced with new
ones, if once those have been removed. — No re-utilization
due to unreliability.
4) Regular spare-parts shall always be used for repair, because
using irregular parts and tampering with the products shall
cause deterioration, mulfunction and damage.
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