8-7
The reset switch used for warm-booting on the DA2O is a small red push-button located
at the bottom of the Cat. No.673 System Services card. The front panel must be removed
to get access this switch. If the front panel is on, the easiest way to boot is to cold-boot by
turning the power off for a few seconds and then on again.
There are several reasons you might wish to do this. Some switch settings have different
meanings during the boot process than they do after the system is loaded. For instance,
some switch settings may only be read by the computer during boot and ignored
thereafter. It is also possible that the programs loaded in the volatile memory have
become corrupted and won’t work any more. In this case, fresh copies must be read in
from the nonvolatile memory before the system will work again.
In the DA20, cold-booting and warm-booting produce slightly different results. After a
cold-boot the system is in analog mode, so as not to disturb the operation of any
associated cinema processor until format 10 is selected. It warm boots, however, to the
state it was last in—analog or digital—so as not to accidentally change formats
immediately after a momentary power failure or brown-out.
Normal boot behavior in a DA20 (observed on the alphanumeric display) is:
r
(goes by very quickly)
c
(goes by very quickly)
L
(stays for about 3 seconds)
–
booted and ready to go
U
means something is not right (failed card or unplugged card, for example).
8.5
Failures in Digital Equipment
A failure in the DA20 will nearly always affect all channels. Therefore if only some of the
audio channels are affected, the problem probably lies elsewhere.
