Welch Allyn Grason-Stadler GSI 17 1717-9700, Service Manual

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3.4 SPECIAL MESSAGES
The GSI 17 is a microprocessor-controlled instrument which
performs a self check each time the instrument is turned on (the
self check does not occur when the instrument is "awakened" from
sleep mode). Certain messages will be displayed to the operator
on the front panel LCD if any error in the instrument operation
is detected. These messages are described below.
3.4.1 CAL
When a transducer or frequency is selected which has a
calibration error (i.e. right earphone at 2000
Hz),
the word
"CAL" will be displayed to the operator. The audiometer will not
function at this frequency with this transducer, so that no
invalid results can be recorded. The word "CAL"
will be
displayed as long as the "problem" transducer and frequency
are
selected. If the calibration error is an isolated situation,
changing either the frequency or the transducer
(i.e. left
earphone or 3000 Hz) will restore normal instrument function.
As is the case with any instrument malfunction, a certified
service technician should be contacted immediately. Remember to
make note of the combination of transducer and frequency which
resulted in the "CAL" message.
3.4.2 Exx
When an error code consisting of an "E" and a 2-digit number (xx,
= number) appears on the audiometer's display, a system error has
been detected. The GSI 17 will enter a "lockout" mode which will
not permit the instrument to operate. The specific error code
will remain on the display for several seconds, then the
instrument will shut itself down completely. Should an Exx
appear on the LCD, take the following steps:
a. Power down, then power up again. This error could be
only a temporary failure and may never appear again.
However, should the Exx message reappear,
proceed to
steps b. and c.
b. Record the numbers that appear on the display.
C .
Contact your certified service representative and give
them the specific numbers you have recorded.