2.2 -
February,
1985
Version
2'
software
update--a
no
'charge update
Ram
Sequencer
Expansion--purchased
option bringing the
Sequencer from 4K to
8K
Sound
Modeling
Program
(25kHz)--purchased option*
*Sound Modeling Program also referred to as sampling
The
Version
2 free software update was offered to all K250
owners and required some modification to the
C.PU
board and the
replacement of the 8 software EPROMs located. at:
82051001
82051201
82051401
82051601
U54
U53
U52
U51
82051101
82051301
82051501
82051701
U38
U37
U36
U35
The RAM
Sequencer
Expansion
required the installation of
four memory chips part
no.
62000901
in
locations U28, U29, U43 and
U44. The original Ram Sequencer Expansion kit included a
replacement for U95 on the CGP board, however, this part is not
included
in
the current kit.
The
Sound
Modeling
Program
required a unit with Version 2
software and involved the update of three p.c. boards, the
CPU, CGP,
Channel; and the possible replacement of the Audio board.
The
CPU board with Version 2 installed only required that
you install part no.
82000408
in
U25, part no. 82000409
in
U40, part
no.
82000410
in
U26 and part no. 82000411
in
U41.
The
CG
P board required 3 cuts to the solder side of the
board and 3 jumps
to
the component side of the board. It also
required the installation of
20
DRAM chips
in
locations U25
through U29, U33 through U37,
U51
through U55 and U72
through U76. The
CGP
board while installed
in
the K250. These
locations are
~asily
found by looking at the inner right hand
corner of the
CGP board.
Kurzweil
250
Service Manual, Chapter 2
2 - 3
To Next Page
Loading...
