Aiwa AD-F990 Service Manual

AIWA'
S/M Code No. 83-014
DATE OF ISSUE 5/1983
SERVICE MANUAL
MODEL NO.
STEREO CASSETTE
DECK
TYPE. H,HU,U,E,K,G
D-F9S90
a.c. primary circuit including mains leads.
2 No illegibility shall be given to the specification plate, the cau-
tion labels, the fuse labels and others.
3. When, on pattern sides of circuit boards, additional repair-parts
have been made up, the parts shall be firmly glued to circuit
boards or other components, unless the parts can be attached
firmly.
4. The following matters shall be maintained 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 UL models, lead-wires to be used shal! be ap-
proved or accepted by the UL.
4) Location of all kinds of insulators
5) Setting df voltage selector switch
*Set the Voltage Selector Switch to 24GV, 220V, or 120V,
According to your Local Voltage.
5. After repaired, the insulation resistance or leakage current shall
be measured with 500 + 5V D.C and shall be not less than IMQ.
Measuring Point
Rating : More than 1M82 500V DC
Pin Jack (—)
AGA— Fit} AC Power Cord¢+)
t Connect ta Chassis or Outside — of Pin Jack
Follow the instructions carefully, which will allow the user to optimise the products'
performance and give many years of serivce.
1. No scratch and melting shall be made to covered lead-wires of an 5. General instructions for 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/fiutter and take-up fault.
Lubricants been stained the surfaces of transmitting portion
of the belts, idiers, capstan and pinch roller shall be removed,
because slippery and faulty tape travel shall be caused.
When oiling, only one or two drops shal! 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.
4) E-rings and poly slider washers shall be replaced with new
ones, if once those have been removed. — No re-utilization
due to unreliability.
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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a a AS i ee ee