Factory Repair Service - Heathkit AA-15 Assembly Manual

Attach the envelope containing one copy of
this letter directly to the unit before pack
aging, so that we do not overlook this impor
tant information. Send the second copy of the
letter by separate mail to Heath Company,
Attention: Service Department, Benton Harbor,
Michigan.
Check the equipment to see that all parts and
screws are in place. (Do not include wooden
cabinets when shipping receivers, tuners, am
plifiers, or TV sets, as these are easily
damaged in shipment.) Then, wrap the equip
ment in heavy paper. Place the equipment in
a strong carton, and put at least THREE
INCHES of resilient packing material (shredded
paper, excelsior, etc.) on all sides, between
the equipment and the carton. Seal the carton
with gummed paper tape, and tie it with a
strong cord. Ship it by prepaid e^qpress, United
Parcel Service, or insured parcel post to:
Heath Company
Service Department
Benton Harbor, Michigan 49022
Your name and return address.
Date of purchase.
A brief description of the difficulty.
The invoice or sales slip, or a copy of
either.
Your authorization to ship the repaired
unit back to you C.O.D. for the service
and shipping charges, plus the cost of
parts not covered by the warranty.
To be eligible for replacement parts under the
terms of the warranty, equipment returned for
factory repair service, or delivered to a Heath
Authorized Service Center, must be accompanied
by the invoice or the sales slip, or a copy of
either. If you send the original invoice or sales
slip, it will be returned to you.
If it is not convenient to deliver your kit to a
Heath Authorized Service Center, please ship it
to the factory at Benton Harbor, Michigan and
follow the following shipping instructions:
Prepare a letter in duplicate, containing the
following information:
NOTE: If the Amplifier is sent back to the
Factory for repair, do not send the cabinet (if
one was purchased). The cabinet is not necessary
for shipping and could be damaged enroute. Com
plete shipping instructions can be found in the
Kit Builders Guide.
FACTORY REPAIR SERVICE
You can return your completed kit to the Heath
Company Service Department to have it repaired
for a minimum service fee. (Kits that have been
modified will not be accepted for repair.) If you
wish, you can deliver your kit to a nearby Heath
Authorized Service Center. These centers are
listed in your Heathkit catalog.
REPAIRING THE AMPLIFIER
When you make repairs to your Amplifier, make
sure you eliminate the cause as well as the
effect of the trouble. If, for example, you should
find a burned resistor, be sure you find out
what it was (wiring error, etc.) that caused the
resistor to burn. If the cause is not eliminated,
the replaced resistor will burn up when the
Amplifier is put back into operation.
The Checking Components section can be used in
conjunction with the Troubleshooting Charts and
Stage-By-Stage Signal Injection Charts to deter
mine a faulty transistor, diode, or capacitor.
If you cannot resolve your problem with the
Troubleshooting Charts, refer to the Stage-By-
Stage Signal Injection tests, beginning on Page
100. Perform these tests as directed. First, they
will lead you to the area your trouble is in. When
you have localized your trouble down to one
area, check the Possible Causes listed for that
area. It may also be helpful to apply the Visual
Tests to that area.
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