Self-Test On Magnets - Braillo 400 S 3 Series User Manual

BRAILLO NORWAY AS
●
3.6

Self-test on magnets.

This printer has 168 electrically activated magnets. Because of the tremendous workload and their
sensitive nature, these magnets may fail sometimes. It is diffi cult to see if a coloumn of dots suddenly
is missing. Because of this there is integrated a self-diagnostic system that check the magnets continu-
ously during printing.
The system checks the magnets by measuring the internal resistance in the coil.
The system will behave a little different if a defective magnet is detected, on power-on/reset or during
printing.
Please observe that the numbering of the magnets in a magnet rack, always starts at "one" at the end
where the connections are. (It does not refer to dot number, character number or column number!).
On power-on or reset:
If a magnet is defective when the power is turned on (or reset), the printer will give an audio alarm, and
all the magnets will start to go on and off at a certain frequency. The frequency will vary depending on
the number of defect magnets. (Slower frequency for more problems).
To be able to run the printer with a defective magnet(s), you can bypass the magnet-test by pressing the
"Fine adjust" button on the control panel.
The display will indicate where the problem is located (what magnet rack), how many defective
magnets, and position of the magnet(s) on that rack. See the example:
Mag . Rack A
03E -05 -09-14
Magnetrack
with error(s)
Number of sheets
since error(s)
first occurred
45
Position of magnets
with error
Number of error(s)
B 400 Series 3
29