Page 14 13900-103 Rev. A
Testing
Introduction
The following section provides testing procedures and
troubleshooting guides that give helpful suggestions when
incorrect operation of the AT550 occurs.
A list of general specifications (e.g., size, weight, voltage
requirements, etc.) for this instrument is given in Appendix
A.
A list of software revisions for this instrument is included
in Appendix C.
CAUTION: ANY REPAIR OR SERVICE TO THE AT550 MUST BE
PERFORMED BY EXPERIENCED PERSONNEL OR
DEALERS THAT ARE TRAINED BY REICHERT
OPHTHALMIC INSTRUMENTS SO THAT CORRECT
MEASUREMENT OF THE AT550 IS MAINTAINED.
CAUTION: THE INTERNAL CIRCUITS OF THIS INSTRUMENT
HAVE ELECTROSTATIC DISCHARGE SENSITIVE
DEVICES (ESDS) AND ARE SENSITIVE TO STATIC
HIGH VOLTAGES STORED IN AND TRANSFERRED
BY THE HUMAN BODY. OBSERVE CORRECT ESDS
PRECAUTIONS OR PREMATURE MALFUNCTION
OF THIS INSTRUMENT WILL OCCUR.
Note: Before internal troubleshooting can occur, the
top and side covers of the instrument must be
removed. Refer to the Disassembly section of
this manual for the details.
Note: The Optical Head Assembly has a warranty seal
installed over an attaching screw that secures
the optical head cover. Removing the seal from
this screw voids warranty, unless pre-authorized
from an Reichert Customer Service Representa-
tive.
Special Tools & Equipment
The following special tools and equipment are necessary
to perform the steps in this section.
Digital Voltmeter (-50 to +50 VDC)
Digital Oscilloscope (Digital Real Time, 1GHz)
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