ENSONIQ EPS-16 PLUS Service Manual

HARDWARE NOTES
EPS-16 PLUS KEYBOARD AND RACK
FLASHBANK Format Errors
Hardware Notes
On Rev C and lower Main boards ONLY (4001013501 with Rev letter is located next to the
MIDI Thru jack) a trace cut must be made in order for the unit to work properly with a
FLASHBANK option (see Figure 10). If this trace is not cut all the way through, you may get a
FLASH FORMAT ERROR message when formatting a FLASHBANK.
DO NOT CUT THIS TRACE
ON REV D (or hi"gher) BOARDS
Pin 38 :>
make sure the trace to
this feedthru is cut.
31
CUT ............... '-Lo
81
On 40010013501 board of"
Rev A, B, or C, make sure
that this trace is cut. This
trace does
not need to be cut
on Rev D or higher boards.
Main Board Edge
Figure
10 -Trace cut for Rev A, B, or C Main Boards
For best
results, be sure that the EPROMs are version 1.ooF or higher. For more information,
see Keyboard
and Rack Similarities on p. 1.
EPS-16 PLUS KEYBOARD ONLY
1. OEX-6CAUTION!!! Th1PORTANT!!!
The 8-pin mini-DIN connector on the rear panel of the EPS-16 PLUS should only be used to
connect
the OEX-6 Output Expander to the unit. This connector does not simply supply audio
outputs
and signal ground and, therefore, cannot be used to generate separate outputs without the"
OEX-6. The EPS-16 PLUS generates digital signals which must be convened externally. The
signals present
on this connector include digital control signals and +/- 15VDC. Improper
connections
to these signals could easily damage the EPS-16 PLUS or any external device
connected. The OEX-6 should never be plugged in or unplugged with the EPS-16 PLUS power
on, as this could damage the EPS-16
PLUS.
2. Keyboards that think that they are a Rack
The
O.S. disk and EPROMs are the same for both the EPS-16 PLUS keyboard and rack. With
O.S. disk Version 1.00, the software determined whether the unit was a keyboard or a rack by
the value/position
of the pitchwheel. If the pitchwheel was off center, the unit would not go
through the keyboard calibration routine and would act just like a rack. To fix this, update the
unit to the latest software
(EPROMs and disk).
EPS-J6 PLUS Service Manual
page 23

ENSONIQ EPS-16 PLUS Specifications

General

Brand	ENSONIQ
Model	EPS-16 PLUS
Category	Recording Equipment
Language	English