Amplifier Research 100A250 series Handbuch - Seite 14
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Model 100A250A
4.1
GENERAL MAINTENANCE INFORMATION
The Model 100A250A should require very little maintenance, since it is a relatively simple instrument. It is built
with etched circuit wiring and solid state devices which should ensure long, trouble-free life. However, should
trouble occur, special care must be taken in servicing to avoid damage to the devices or the etched circuit board.
Since the components are soldered in place, substitution of components should be a last resort unless there is some
indication that they are faulty. In addition, take care when troubleshooting not to short voltages across the amplifier.
Small bias changes may ruin the amplifier due to excessive dissipation or transients.
Components within Amplifier Research instruments are conservatively operated to provide maximum instrument
reliability. In spite of this, parts within an instrument may fail. Usually, the instrument must be immediately
repaired with a minimum of "down time". A systematic approach can greatly simplify and thereby speed up the
repair.
However, due to the importance of the amplifier's alignment, it is recommended that when failure is caused by
breakdown of any of the components in the signal circuits, the amplifier be returned to the factory for part
replacement and amplifier realignment. Shipping instructions are as follows.
Ship:
PREPAID
Via:
UNITED PARCEL SERVICE
To:
AMPLIFIER RESEARCH CORPORATION
160 SCHOOL HOUSE ROAD
SOUDERTON, PA 18964
See Warranty Statement at rear of panel.
4.2
DISASSEMBLY PROCEDURE
REMOVE POWER CORD FROM RECEPTACLE BEFORE SERVICING.
4.2.1
Remove top cover by removing the screws.
4.2.2
Remove circuit board and heat sink by removing the screws around the perimeter of the heat sink.
SECTION IV
MAINTENANCE
CAUTION:
Manual Text
4-1
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