Alesis ADAT-XT20 Reference Manual page 123

Appendix C: Error Codes
Er 7
Clean Heads: If this error message is seen, it may indicate that the heads
are in need of cleaning. See ADAT Head Maintenance for information about cleaning
your heads.
Er 8
Sync Lost: Error message 8 normally occurs when the tape reaches the end
while formatting or recording. It is caused by the fact that the XT20 cannot read timing
data from the leader. The error is caused by the unit losing sync. If the unit is being run
in the slave mode check the sync cable connection. It is recommended that only
shielded and grounded cables be used as sync cables.
Er 9
Take-up Reel. This error indicates that the take-up reel didn't move after
PLAY or RECORD was engaged. This can spool tape out of the cassette, so the XT20
stops the tape immediately. It's possible that the take up reel of the tape is jammed;
try a blank or unimportant tape to see if the error recurs. The idler wheel that turns the
take-up reel may need cleaning or replacement.
no 9ood tc No Time Code. The XT20 is reading control track pulses, but no helical
scan time code. Usually, a video tape has been inserted into the XT20. Format the tape
in the ADAT format.
NOTE: "No good tc" will also appear if you insert a Type II (20-bit) tape
into an older, Type I-only machine. Make a 16-bit clone of any 20-bit tapes for use in
older-generation machines.
(Error 10 through 13 and 16 are not used)
Error 14-15
problem with the RAM buffer used for crossfading. Reinitialize the XT20 using the
procedure on page 99. If the problem recurs, the unit must be serviced.
Error 17
leader at the head and tail of the tape cartridge is not working or is blocked
temporarily. If the error recurs on other tapes, the unit needs to be serviced.
AL P
This error message may appear when you turn on power to the XT20. If the
display also reads "CAL brAC", there may be something wrong with the battery
backup of RAM, or the RAM was accidentally scrambled. If no other error messages
occur during operation, and the Interpolation Indicator (see page 41) is not flashing,
playback and recording are still possible. However, do not format any blank tapes on
the XT20 until the PG is reset .
AL brAc
have been set to the default settings due to a problem with RAM memory or the backup
battery. Perform the automatic brake calibration (see below). If this message appears
in the midst of normal operation more than once in every ten hours of operation, perform
the automatic brake calibration (see "Automatic Brake Calibration Procedure", next
page).
122
Crossfade buffer, state or channel error. This indicates a
End sensor error. One of the optical sensors used to detect the clear
If this message appears during the turn-on cycle, the brake settings
ADAT-XT20 Reference Manual