Tally T2040, Maintenance Manual

Page: 30 / 108

4.4
AGA test
This test is used for checking the function of the AGA feature.
After activating the AGA test the printer changes over to the rolling ASCII test. Se-
lect the parameter ASCII136 or ASCII80 in accordance with the paper inserted
(ASCII 136 is only displayed on the wide printer).
The printer changes to the Offline mode and various numbers appear in the top line
of the display. Press the Online key to start the test printout.
Example of a AGA test
printout
The following section does not describe the contents of the printout in detail but
merely explains the global meanings, or the limit values not reached or exceeded.
In this example, the line
lim[300mV] max[300mV] width[400
µ
s] try dist
gives the following informations
lim[300mV]
The value of the spurious pulses must be in a range from 1 to
15. The lower the value is, the better.
max[300mV]
The value of the measuring pulses must be in a range from 1
to 15. The higher the value, the better.
The AGA measuring result is at its most reliable the greater
the difference between the lim- and max-values.
width[400
µ
s]
Active pulse width; the value must be greater than 6
.
try
Number of measurement attempts; several attempts indicate
that a fault may exit in the AGA feature.
dist
Theoretical print head distance; measured values should not
differ substantially (18 is the approximate standard distance
for single-layer 80 g/m
2
paper).
To exit the AGA test, switch the printer off.
AGA test Test functions, troubleshooting and maintenance
4-10