Troubleshooting Guide
TROUBLESHOOTING GUIDE
Often
the
faulty module
in
an
EPS-16
PLUS can be determined through normal use. Sometimes,
it
is
difficult to isolate the problem. The following flowcharts can help you diagnose
units
that appear
dead
(no
display).
When
troubleshooting an
EPS-16
PLUS, always disconnect any expansion devices
that
may be
present
(such
as
the memory expander, SCSI Interface or
OEX~
Output Expander). This
will
prevent
a faulty expander from complicating your troubleshooting. The procedures
for
testing the
Memory
Expander and the SCSI Interface are included with the corresponding expander. The
procedure
for testing the
OEX-6
can
be
found
on
p. 19.
The
following pages include troubleshooting flow charts:
~Problem
9 Incorrect Power Supply Voltages
12 Footswitch problems
13
EPS-16
PLUS with
No
LEDs Lit
14
EPS-16
PLUS with Some LEDs Lit
15
EPS-16
PLUS with
All
LEDs Lit,
No
Display
Troubleshooting
an
EPS-16
PLUS with a Footswitch Problem (see
Figure
6)
If
one
or
both of the footswitches do not operate properly, make sure that the footswitches
are
set
to
the
proper
mode (on the Edit/System·MIDI page). See Section 2
of
the
EPS-16
PLUS
Musician's
Manual) for more information. .
The
SUSTAIN
Fr
SWITCH parameter corresponds to the right pedal
of
SW-5
or
single
pedal
SW-l.
The
AUX
FT
SWITCH parameter corresponds to the left pedal
of
SW-5
only.
The
SW-5
is
the
Dual
Footswitch (piano-type) available from ENSONIQ. .
On
the Edit/S MIDI system· . page:
SUSTAIN
FT
SWITCH
AUX
FT
SWITCH
Footswitch
SW
-1 single footswitch,
or
SW
-5 left pedal
. SW-5 right pedal
Default
SUSTAIN
OFF
Option
right
PATCH SL button
sequencer
START/STOP
Option
- left PATCH SEL button
If
the
footswitch mode is correct and the footswitch still doesn't function properly,
there
is either a
problem
with the
Main
Board, the
KeyboardIKPC
or
the 2O-pin ribbon cable
connecting
the two.
Although the footswitch
jack
is
mounted on the
Main
Board, the footswitch signals are carried
over
to.
the
KeyboardIKPC by the 2()-pin ribbon cable, where they are sensed by the KeyboardIKPC
mlcroprocessor.
EPS-16 PLUS Service Manual
page
11
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