ADA MB-1 owners manual version 2
which may be ordered from your authorized dealer, or directly from ADA. Order ADA part
number 701083.
ERROR CODES
DISPLAY CAUSE ACTION
C 1 to C 256 Preset checksum error. The
preset indicated was found to
be in error. The preset is
initialized to default values.
Re-enter the data for the
preset.
Err 1 MIDI map checksum error. All
MIDI program numbers are
set 1: 1 with internal memory
numbers.
Re-enter MIDI map
assignments.
Err 2 Working register checksum
error. All values of stored
parameters in the working
register are set to default
values. All are set to 0 except
effects loop is set to 'out' and
the tube voice is selected.
Call up another program
number or re-enter parameter
values via Edit session.
Err 3 MIDI control parameters
checksum error. All
parameters set to default
values: MIDI = OFF, MIDI
internal # = 1, most recently
received MIDI program = 1,
current program = 1, Memory
protect = ON, and display
flashes.
Re-enter MIDI parameters via
front panel.
[None] Indicates the program itself
has an error. Program will
not display anything and unit
will not operate.
Check power source and
fuse. If good, unit
requires service.
BATTERY REPLACEMENT
The MB-1 uses a 3-volt Lithium battery which maintains power for program storage while the
MB-1 is unplugged from an AC supply. Expected battery life is 8-10 years. Should
replacement be necessary, contact a qualified service technician.
TUBE REPLACEMENT
Your factory installed 12AX7A tubes should last approximately two years. When tube
replacement becomes necessary, we recommend that you use only ADA factory-tested
replacement tubes for the cleanest and quietest performance possible. These can be
obtained from ADA or an authorized ADA dealer. Order ADA part number 800301 for a
matched pair. For more information call ADA customer service at (415) 632-1323.
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