Automatic Brake Calibration Procedure - Alesis ADAT-LX20 Reference Manual

Error Codes - Appendix C
A
UTOMATIC
If the "CAL brAc" error message appears, the internal braking system of the LX20
may need to be adjusted. The intelligent transport software is capable of calibrating
the LX20's brakes automatically in a self-test procedure. You may perform this
procedure as a regular maintenance procedure every 250 hours of head drum
operation (to see the hours on your unit, hold SET LOCATE and press STOP).
Obtain a standard ST-120 length tape (preferably a Quantegy 489 such as the
one shipped with your unit) that has already been completely formatted from
beginning to end. Use a non-essential tape (i.e., don't insert your only copy of a
master tape). Do not use other lengths of tape such as ST-180 or ST-60.
Turn off the POWER switch. Hold REWIND and FAST FORWARD while
turning the power back on again. The display will read "CALIbrAt".
Insert the tape into the transport.
The unit will now adjust the brake tension automatically. The transport will
shuttle back and forth for about 5 minutes. During the operation, the tape will
half-eject twice. This is normal.
The display should briefly read "PaSS" before ejecting the tape fully and
returning to the "20 Bit LX" start-up screen. The brakes have now been
recalibrated.
If the "CAL brAc" message appears again shortly after a brake calibration has
been performed, there may be something wrong with the tape being used. Check
operation with another tape. If the message persists, the unit must be
professionally serviced.
Note: If these errors occur only with a certain tape, or display once in a while, it's
probably not cause for concern. Errors 1 through 3 and 9 can indicate conditions that
may damage a tape; the other errors won't damage the tape or the machine.
Backup the data from that tape to another machine, if possible, and continue
working from the backup copy.
86
B C
RAKE ALIBRATION
P
ROCEDURE
ADAT LX20 Reference Manual