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DIAGNOSTICS
PROGRAMS
In the main unit of the REV-1,
self-diagnostic
programs
will automatically
check
the micro-
computer portion,
interfaces,
and other parts
of the control
P.C.
Board.
If any abnormality
is detected,
the following may occur:
1. No number will be displayed
on the dis-
plays
(REVERB TIME,
E/R DELAY
1, MEMORY).
2. "0" will be displayed on all displays.
3. No entry will be accepted
from keys or
buttons.
If this happens,
run
the follow-
ing self-diagnostic
programs:
G Enter Self-Diagnostic Mode
All self-diagnostic
programs
will
be run
with the front panel controls.
Hold the "R/T" and the "MEMORY" buttons down
at the same
time while you turn on the power.
This will put the unit in the self-
diagnostic
mode.
At this time,
the control
P.C.
Board will automatically
be checked.
The following display means
that there
is
nothing wrong with
the control
P.C.
Board:
lit
off
REVERB
TIME
met
LI
LI
sec
E/R
DELAY
1
I
II ms
POWER
REMOTE
R/T
MEMORY
DELAY
1
MEMORY
a. lll
If the above
is not displayed,
something
is
wrong with the control
P.C.
Board.
When the control
sheet has been found
to be
functioning
normally,
perform
the following
procedures :
35
OCheck
the Digital Arithmetic Operations
of the APF and COM P.C.
Boards
Press
the following
buttons
in the order
shown:
MEMORY - 1 - 0 - RECALL
If the APF and COM P.C.
Boards are function-
ing normally,
you will see
the following
display:
REVERB
TIME
Vll
LILI | sec
E/R
DELAY 1
1171
ІІ
dios
MEMORY
Г]
ILI
If a number from between 10.0 to 34.1 is
displayed on the "REVERB TIME" display,
something
is wrong with
the APF P.C.
Board.
If a number from between 40.0 to 54.1 is
displayed,
there
is something
wrong with
the
COM P.C.
Board.
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