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Kurzweil250
SERVICE MANUAL
(K250, K250X and RMX Models)
Kurzweil Music Systems, Inc.
411 Waverley Oaks Road
Waltham, MA 02154
(617) 893-5900
January, 1989
Document No.: 92000201
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CHAPTER 1
CHAPTER 2
CHAPTER 3
CHAPTER 4
CHAPTERS
CHAPTER 6
CHAPTER 7
Table of Contents
INTRODUCTION
PRODUCT HISTORY
SYSTEM OVERVIEW
DIAGNOSTICS
DISASSEMBLY/ASSEMBLY PROCEDURES
PARTS LISTS
SCHEMATICS, LAYOUTS, WIRING DIAGRAMS
KURZWEIL MUSIC SYSTEMS, INC. 411 WAVERLY OAKS ROAD WALTHAM, MA 021S4
DOCUMENT PART NO. 92000201
January, 1989
Kurzweil Music Systems, Inc.
The information contained herein is confidential and proprietary to Kurzweil Music Systems, Inc. It is disclosed to you solely for purposes of instruction as to operation of the equipment and maintenpnce as appropriate. It is not to be used by you for any other purpose, nor is it to be disclosed to others without the express permission of Kurzweil Music Systems, Inc.
Kurzwell 250 Service Manual
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Chapter 1 - Introduction
1.1 |
Product Description |
1-2 |
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1.2 |
Specifications |
1-3 |
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1.2.1 |
Kurzweil 250 |
1-3 |
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1.2.2 |
Kurzweil 250X |
1-3 |
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1.2.3 KurzweiI 250 RMX and 225 RMX |
1-4 |
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1.3 How the Kurzweil 250 Works |
1-5 |
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1.3.1 |
Masters Section |
1-5 |
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1.3.2 |
Assignments Section |
1-5 |
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1.3.3 |
Selection Section |
1-6 |
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1.3.4 |
Program Section |
1-6 |
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1.3.5 |
Media Section |
1-7 |
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1.3.6 |
Back Panel |
1-7 |
Kurzweil 250 Service Manual, Chapter 1
1 - 1
1.1 - PRODUCT DESCRIPTION
The Kurzweil 250 uses artificial intelligence principles and a Motorola 68000 microprocessor to create complex models of acoustic sounds. The Kurzweil 250'sdesign gives the instrument a
velocity-sensitive keyboard |
so |
that a |
note's volume· and timbre |
relates to the force on the |
key. |
The |
12-note, polyphonic keyboard |
can accurately reproduce the sounds of several instruments at once and each key on the 88 note keyboard can be individually assigned to play a different sound.
Currently, the Kurzweil 250 comes with 36 different instruments arranged into 98 keyboard setups in the basic Enhanced Resident Sound Block excluding Sound Blocks A thorugh D. The original Kurzweil 250 came with 30 different instruments arranged into 40 keyboard setups.
The Kurzweil 250's sequencer is a built-in, 12,OOO-note multi-track digital recorder, which can be used to build up to 12 different tracks. Older Kurzweil 250's may have either 4,000 or 8,000 note sequencer. These units can be updated to the current 12,000 with the purchase of available options.
All Kurzweil 250s are currently manufactured with the Kurzweil Sound Modeling Program for user sampling. Older Kurzweil 250s may not have this option, but may be updated with the purchase of the Sound Modeling Program option.
There are many configurations of Kurzweil 250s currently in the field. The Kurzweil 250 Product Line also includes the Kurzweil
250X, an expander unit without |
keyboard, and the Kurzweil RMX 250 |
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or 225, a rack |
mount expander |
unit. Please see the Product History, |
Chapter 2, for |
more information. |
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Kurzwell 250 Service Manual, Chapter 1
1 - 2
1.2 - SPECIFICATIONS
1.2.1- Kurzweil 250
Keyboard: 88 keys with velocity-sensing and piano action. Pedals: 2, assignable piano-type in the POD, 2, external
volume-type |
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Dimensions |
(Cabinet): |
56"(L) X 27"(W) X |
9"(H) |
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Dimensions |
(POD): 22"(L) X 11 "(W) X 4.5"(H) |
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Weight |
(Cabinet): 95 |
Ibs. |
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Weight |
(POD): |
22 Ibs. |
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Power |
Consumption: |
110/220 VAC, |
50/60Hz, |
380 |
watts |
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max. |
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Operating Conditions: 0 to 500 C Ambient 20 to 80% |
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Relative |
Humidity |
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Storage |
Conditions: |
-25 to |
1250 C,10 |
to |
90% Relative |
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Humidity |
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Audio Outputs: |
High |
level, |
Low level, |
Balanced, Stereo |
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headphones |
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External |
I/O: |
High-speed parallel computer port, |
MIDI |
In, |
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MIDI Out and MIDI Thru ports, Sync In, Sync Out, Trigger In, Click Out, MIC, Line In, 2 External volume-type pedals,
cartridge slot
1.2.2 - Kurzweil 250X
Dimensions |
(Cabinet): 49 1/2" (L) X 20 1/2" (W) X 6 |
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3/4"(H) |
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Dimensions |
(POD): 22"(L) X 11"(W) X 4.5"(H) |
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Weight |
(Cabinet): |
45 |
Ibs. |
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Weight |
(POD): |
22 Ibs. |
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Power |
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Consumption: |
110/220 |
VAC, |
50/60Hz, 380 |
watts |
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max. |
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Operating Conditions: 0 to 500 C Ambient 20 to 80% |
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Relative |
Humidity |
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Storage |
Conditions: |
-25 to |
1250 C,10 |
to |
900/0 Relative |
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Humidity |
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Audio |
Outputs: |
High |
level, |
Low level, |
Balanced, |
Stereo |
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headphones |
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External |
I/O: |
High-speed |
parallel |
computer port, |
MIDI |
In, |
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MIDI |
Out |
and MIDI Thru ports, Sync In, Sync Out, Trigger In, |
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Click |
Out, |
MIC, |
Line |
In, |
2 |
External |
volume-type pedals |
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Kurzwell 250 Service Manual, Chapter 1
1 - 3
1.2.3 - Kurzweil 250 RMX AND 225 RMX |
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Dimensions |
(Cabinet): |
19" (L) X 22" |
(W) X 10 1/2"(H) |
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Weight (Cabinet): 53 |
Ibs. |
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Power |
Consumption: 110/220 VAC, |
50/60Hz, 380 |
watts |
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max. |
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Operating Conditions: 0 to 500 C Ambient 20 |
to |
800/0 |
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Relative |
Humidity |
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Storage |
Conditions: |
-25 to |
1250 C,1 0 |
to |
90% |
Relative |
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Humidity |
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Audio Outputs: High |
level, |
Low level, |
Balanced, |
Stereo |
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headphones |
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External |
I/O: |
High-speed parallel computer port, |
MIDI |
In, |
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MIDI |
Out |
and MIDI Thru ports, Sync In, Sync Out, Trigger In, |
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Click |
Out, |
MIC, Line In, |
2 |
External volume-type |
pedals |
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Kurzwell 250 Service Manual, Chapter 1
1 • 4
1.3 - HOW THE KURZWEIL 250 WORKS |
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This section describes briefly how the Kurzweil 250 |
controls |
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work. |
Refer |
to |
the |
Kurzweil |
250 rUser's Guide for more |
detailed |
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information. |
Since |
this |
is a |
complex |
instrument, |
always |
confirm |
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that |
a problem |
truly |
exists |
before |
attempting |
to· service the |
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instru ment. |
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1.3.1- Masters Section
The group of slider controls in the Masters section controls the overall sounds that the instrument makes.
TUN E - Use this slider control to control the overall pitch of all active voices.
INSTRUMENT GROUPS A & B - These two sliders move two different, assignable instrument groups from left to right in the stereo image.
VOlUM E - This controls overall volume.
1.3.2 - |
Assignments |
Section |
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This |
section of the Front Panel controls are used primarily |
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during |
live |
performance. |
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Each |
of the three |
vertical sliders can be assigned to control one |
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of approximately 20 different functions such as tremolo, pitch bend,
vibrato, legato, attack, decay and sustain. |
By using these controls, |
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you |
can simulate a wide variety of playing |
techniques, including a |
full |
variety of synthetic effects. |
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Musicians can also assign the foot pedals and Mod levers using switches in this section.
Kurzwell 250 Service Manual, Chapter 1
1 - 5
1.3.3 - |
Selection |
Section |
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t"-- |
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The Selection area on the |
Front Panel contains the switches |
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that allow users to |
control the main r functions of the system. With |
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the LCD display, they tell what |
operating mode'the instrument is in |
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and allow the musician to make changes and answer questions. |
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SPLIT KEYBOARD - This is another control used at per- |
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formance time. |
It allows |
you |
to assign a certain section of |
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the |
keyboard temporarily to |
a |
certain instrument. |
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CHORUS - When you press this button, you can turn one sound into many. The "Chorus" capability can be used for doubling, built-in echo and flanging.
SELECTION SWITCHES - The YES, NO and SELECT switches are used to choose options and answer questions displayed on the LCD.
NUMERIC KEYPAD - Use the numeric keypad to enter choices and to select functions (with the "F" switch).
1.3.4 - Program Section
This group of controls, along with the numeric keypad, allow you to program the Kurzweil 250. These controls are generally used for setup before a performance.
CURSOR KEYS - The cross shaped group of keys below PLAY are the cursor controls. The center key (R) is for resetting when you have made a mistake or want to return to the initial cursor placement.
S EQU EN C E R - The Kurzweil 250's sequencer is a built-in, 12,000 -note multi-track digital recorder. You can use it to lay
down |
one instrument and then play a second instrument on top |
of it. |
By repeating this process, you can build up to 12 diff- |
erent |
tracks. |
Other keys in this section speed up or slow down the tempo of a piece, modulate to another key, change modes or edit keyboards, instruments or sequences.
Kurzwell 250 Service Manual, Chapter 1
. |
1 - 6 |
1.3.5 |
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Media |
Section |
The |
Media |
section lets you program, store and recall your own |
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set of |
keyboard |
setups, instruments and .sequences. |
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LIST - This key allows you to run through, in any order, every keyboard setup stored in the Kurzweil 250'smemory. You can reprogram this list to meet you own performance needs. You can also list sequences using this switch.
STO RAG E - The Storage READ switch is used to prepare the instrument to use a cartridge. In future versions of the instrument, the STORAGE switches will be used with external media options.
1.3.6 - Back Panel
The back panel contains all the input/output connections for the Kurzweil 250.
COMPUTER - This is the parallel computer port for attaching a personal computer to the Kurzweil 250.
TRIGGER IN - The Trigger In is a TTL-compatible input used for starting a sequence from an external device. The sequence triggers on the positive edge of the supplied pulse. Minimum pulse width is 1 microsecond. The input impedance is greater than 10k ohms. The trigger level is 2 volts. This I/O port takes a 1/4 inch phone jack.
CLICK OUT - The Click Out is a TTL-level output pulse. When enabled from the Front Panel, a positive pulse appears at this output. Its repetition rate is the selected sequencer tempo. Driving source is a low power TTL gate through a 51 ohm resistor. This I/O port takes a 1/4 inch phone jack.
SYNC IN - The Sync In is a TTL-compatible input used to drive the Kurzweil 250 from another instrument. The other instrument is to provIde a square wave at X12 to X96 the tempo. The input impedance is greater than 10K ohms. The trigger level is 2 volts and this I/O port takes a 1/4 inch phone jack.
Kurzwell 250 Service Manual, Chapter 1
1 - 7
SYNC OUT - The Sync Out is a TTL-level square wave. output used to drive other instruments in synchrony with the Kurzweil
250.The repetition rate is normally X12 to X96 the tempo. The
driving |
source |
is a |
low power r TTL |
gate through a 51 ohm |
resistor. |
This I/O |
port |
takes a 1/4 inch |
phone jack. |
MIDI IN - This is a 31.2K baud, 5 milliamp serial input.
MIDI THRU - This is a 31.2K baud, 5 milliamp serial output.
MIDI OUT - This is a 31.2K baud, 5 milliamp serial output, the same as MIDI IN buffered.
LO - These are 2 VPP audio outputs, with a 600 ohm driving source impedance. These require 1/4 inch phone jacks and are suitable for line level inputs.
ill - These are 20 VPP audio outputs, with a 600 ohm driving source impedance. These require 1/4 inch phone jacks and are suitable for directly driving power amplifiers and other high level inputs.
BALANCED - These are 20 VPP audio outputs. They have XLR connectors, floating outputs and a 600 ohm driving source impedance.
EXTERNAL PEDALS 1 & 2 - The 1/4 inch phone jacks accept assignable pedal functions (K250 and K250X only).
M.lQ. - This digitizer input is a 200 mVPP full scale input. It has a 47K ohm input impedance and accepts a 1/4 inch phone jack.
LINE IN - This digitizer |
input is a 1 VPP full scale input (300 |
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MV rms.) |
It has a 10K |
ohm input impedance and accepts a 1/4 |
inch phone |
jack. |
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Kurzweil 250 Service Manual, Chapter 1
1 - 8
Chapter 2 - Product History
2.1 |
History Introduction |
2-2 |
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2.2 |
February, 1985 |
2-3 |
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Version 2 Software |
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RAM Sequencer Expansion |
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Sound Modeling Program (25kHz) |
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2.3 |
May, 1985 |
2-4 |
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Sound Block A |
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2.4 |
June, 1985 |
2-5 |
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New K250 Configurations |
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2.5 |
August, 1985 |
2-5 |
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Kurzweil 250X Introduced |
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2.6 |
October, 1985 |
2-6 |
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Version 2.2 Software |
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50kHz Sound Modeling Program |
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50kHz Sound Modeling Program Upgrade Kit |
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2.7 |
March,1986 |
2-7 |
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Version 3.1 Software |
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Enhanced Resident Sound Block (CGP) |
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Sound Block B |
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2.8 |
August, 1986 |
2-8 |
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Version 3.2 Software |
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QLS |
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Sound Block C |
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2.9 |
December, 1986 |
2-10 |
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Version 4 Software |
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Superam I and 1/ |
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Sound Block D |
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2.10 |
March,1987 |
2-11 |
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RMX Introduced |
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2.11 |
April,1987 |
2-11 |
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Version 4.1 |
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2.12 |
October, 1987 |
2-12 |
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Version 5 Software |
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Separate Outputs |
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2.13 |
September, 1988 |
2-12 |
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Version 6 Software |
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RAM Cartridge |
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RAM Cartridge Adapter |
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2.14 |
Software Version Versus Options Available |
2-14 |
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2.14.1 |
Version 2 |
2-14 |
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2.14.2 |
Version 2.2 |
2-14 |
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2.14.3 |
Version 3.1 |
2-14 |
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2.14.4 |
Version 3.2 |
2-15 |
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2.14.5 |
Version 4 and 4.1 |
2-16 |
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2.14.6 |
Version 5 |
2-17 |
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2.14.7 |
Version 6 |
2-18 |
2.15 Sound Block Positioning for Enhanced Resident Sound Block |
2-20 |
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2.16 |
Options Versus K250 Configuration |
2-22 |
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1
Kurzweil 250 Service Manual, Chapter 2
2-1
2.1 - History Introduction
The following outlines possible configurations of K250s in the field. When the K250 was first introduced to the field in August of 1984 the K250 contained Version 1 so'twareand no options. Please be aware that some options are required and some are optional.
Please refer |
to |
the "Software Versions Versus Options Available" |
list included |
in |
this chapter for configuration information. |
Note: Specific part numbers are mentioned in this document pertaining to parts included in option kits. However, not all part numbers required for certain options are mentioned. This document has been prepared to give you a brief history of the options and updates for the K250, K250X and the RMX 250 and 225. This chapter is not meant to replace the installation procedure supplied with each option kit.
The Kurzweil 250, K250X and RMX contain the following printed circuit boards:
CPU/Central Processing Unit
CGP/Channel Group Processor
Channel
Audio
Slider
LCD
Control Panel
Bass and Treble Keyswitch boards (K250 only)
Power Supply (internal, RMX models only)
Kurzwell 250 Service Manual, Chapter 2
2 - 2
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 |
U54 |
82051101 |
U38 |
82051201 |
U53 |
82051301 |
U37 |
82051401 |
U52 |
82051501 |
U36 |
82051601 |
U51 |
82051701 |
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 |
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you |
install part no. 82000408 in U25, part no. |
82000409 in |
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U40, |
part no. |
82000410 in U26 and part no. 82000411 in |
U41. |
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The CG P |
board required 3 cuts to the solder side |
of the |
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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
The Channel board |
required |
the installation |
of |
U60, |
part" no. |
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63001201. |
Some units |
did not. have a socket |
at |
this |
location; |
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and, therefore, required the addition of that socket. This |
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socket was supplied with the kit. Kurzweil never recommends |
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that this part is soldered |
into the board. |
It was |
also |
required |
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to check |
values of |
certain resistors and capacitors on the |
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Channel board and the addi-tion or replacement of these parts. |
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The Audio board |
needed to be replaced for any unit produced |
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prior to February |
of 1985. |
Therefore, Kurzweil |
offers |
two |
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Sound Modeling Program kits, one with Audio board and one |
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without. |
(Kurzweil |
offers |
these kits at |
the same |
cost.) |
The |
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part number of the Audio board required for Sound Modeling |
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Program is 12011001. Some boards may not actually have this |
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part number printed |
on |
it, |
but |
will have the correct p.c. board |
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fabrication |
number, |
33011001. |
The old Audio board that needs |
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to be removed is part no. 12001001 or |
p. c. |
board fabrication |
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no. 33001001. |
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2.3 - May, 1985
Sound Block A--purchased option
The Sound Block A board was offered under three part numbers 14000801, 14000802 or14001301. Although there was no
difference in the Sound Block |
A board |
itself, |
this was done as a |
result of the K250s in the field. |
Older |
K250s |
did not have a series |
of modifications to the CGP board required for Sound Block A. For these units, Kurzweil offered kit part number 14000801. This included an updated CGP board as well as the Sound Block A board. The old CGP was to be returned to Kurzweil or the customer was invoiced for the board. Part number 14000802 was used for customers who sent in their CGP board to be updated at Kurzweil. Once the update was completed Kurzweil returned the CGP board with a Sound Block A board attached. This update to the CGP board was done free of charge. Part number 14001301 was just the Sound Block A board sent to be installed on CGP boards that did not require any modification.
Kurzweil 250 Service Manual, Chapter 2
2 - 4
The Sound Block A board is mounted on the CGP board. If you look at a CGP board installed in the K250, you will notice a long white connector'(47A) mounted on the board in the lower left hand quarter of the board. The Sound Block A board is plugged into this connector and mounting hardware is rinstalled to secure it.
How to know if the CGP board is ready for the addition of the Sound Block'A board? Check in the vicinity of the long white connecter (47A) located in the lower left· hand quarter of the CGP board. If this board has been modified to accept a Sound Block A
board, you will notice some rework wiring coming |
from U126, |
U134 |
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and U149, to name a few. This wiring |
will |
begin |
at these locations |
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and encircle the white connector and end at locations below. |
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2.4 - June, 1985--new Kurzweil 250 configurations |
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Part |
No. |
10001601--Basic |
unit, |
no |
sampling |
or |
sound |
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block |
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Part No. 10001701--Full unit, w/Sound Block A |
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Part |
No. 10001801--Advanced Sampling, w/Sampling and |
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Sound Block A |
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Note: |
These units contained the Ram |
Sequencer |
Expansion |
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option |
as |
standard. |
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2.5 - August, 1985--Kurzweil 250X introduced |
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||||||
Part |
No. |
10001901--Basic |
unit, |
no |
sampling |
or |
sound |
||
block |
|
|
|
|
|
|
|
|
|
Part |
No. 10002001--Full unit, w/Sound Block A |
|
|
||||||
Part |
No. |
100021 01--Advanced |
Sampling, w/Sampling and |
||||||
Sound Block A
Note: These units also contained the Ram Sequencer Expansion option as standard.
Kurzwell 250 ServIce Manual, Chapter 2
2- 5
At |
introduction, |
the |
Kurzweil |
250X |
was |
introduced |
'with |
|
Version |
2.1 software. |
This software. did not support sampling and |
||||||
sampling |
could not be |
used |
with the |
K250X |
until |
Version |
2.2, |
which |
will be discussed later. |
.An |
important |
difference |
between |
the |
K250 |
||
and the K250X is that every K250X produced had its program EPROMs contained in 256K EPROMs. The Kurzweil 250 used 128K EPROMs at that time.
2.6 - October, 1985
Version 2.2 introduced--free update
50kHz Sound Modeling Program--purchased option 50kHz Sound Modeling Upgrade Kit--purchased upgrade
Version 2 software was now obsolete. Version 2.2 supported 50kHz sampling and corrected some known bugs in Version 2. It was a free update, but was only offered to customers who were experiencing problems or who were purchasing a Sound Modeling Program or a 50kHz Upgrade Kit. One thing to note is that if a customer had a unit with 25kHz sampling and wanted Version 2.2, the unit had to be upgraded to 50kHz. The Version 2.2 EPROMs should
be the following: |
|
|
|
82051021 |
U54 |
82051121 |
U38 |
82051221 |
U53 |
82051321 |
U37 |
82051421 |
U52 |
82051521 |
U36 |
82051621 |
U51 |
82051721 |
U35 |
The 50kHz Sound Modeling Program was offered in the same way the 25kHz options were offered. Kurzweil continued to offer two kits (with or without Audio board) for purchase. The
modifications to |
the K250 were basically the same |
as |
those outlined |
|
in |
the installation procedures for the 25kHz upgrade. |
However, not |
||
all |
modifications |
were necessary for units recently |
produced. |
|
Kurzweil 250 Service Manual, Chapter 2
2 - 6
The 50kHz Sound Modeling Upgrade Kit requireo that the K250 had Version 2.2 installed. The. sampling EPROMs on the CPU board needed to·be replaced with part no: 82000412 at U25, part no. 82000413 at U40, part no. 82000414 at U26; and part no. 82000415 at U41. The AID converter at U60 Ion the Channel board must be replaced with part no. 63001701 and one cut and one jump is required.
Note: When installing the 50kHz Sound Modeling Program or the 50kHz Upgrade kit, the cut and jump to the Channel board is not necessary on the K250X. Every K250X produced had this modification already performed. Also, modifications to the CGP board required for Sound Block A and sampling are not required.
2.7 - March, |
1986 |
|
Version |
3.1 software--pu rchased |
option |
Enhanced Resident Sound Block--purchased option (new |
||
CGP) |
|
|
Sound Block 8 (Rock Block) |
|
|
The installation of Version 3.1 in |
K250s required cuts and |
|
jumps to the CPU board. These modifications were required to add the additional 4K memory and to reconfigure the board for the installation of 256K EPROM (CPU until this point used 128K EPROMs).
Version 3.1 also required units with 25kHz sampling to be upgraded to 50kHZ sampling. Because Version 3.1 supported a 12K sequencer memory, units with only 4K had to be upgraded to 8K. The installation of Version 3.1 involves installing the Version 3.1 EPROMs at the following locations:
82101401 |
U54 |
82101501 |
U38 |
82101601 |
U53 |
82101701 |
U37 |
82101801 |
U52 |
82101901 |
U36 |
82090401* |
U51 |
82090501* |
U35 |
*50kHz Sound Modeling EPROM locations
,-
Kurzweil 250 Service Manual, Chapter 2
2 - 7
Note: The Kurzweil 250X CPU board does not requir~ any cut or jump. It is only necessary to remove the Version 2.1 or 2.2 EPROMs and install the Version 3 EPROMs.·
The installation of the Enhanoed Resident Sound Block requires Version 3.1. For units with Sound Block A boards, the Sound Block A board could be reinstalled on the Enhanced Resident Sound Block. Or, if the Sound Block A chips were socketed; they could be removed and installed on the Enhanced Resident Sound Block in the empty sockets designated for the sound block.
When installing the Enhanced Resident Sound Block, be sure to remove the 20 DRAMs, if present, located on the old CGP and reinstall them on the Enhanced Resident Sound Block. Failure to do so will render sampling useless.
Sound Block B may be installed on a Sound Block A board or the Enhanced Resident Sound Block. If Sound Block B is being installed on a Sound Block A board be sure that there are sockets for the chips. These sockets are supplied with the kit if ordered properly. Kurzweil does not recommend that these chips are soldered into the Sound Block A board. Therefore, when ordering a Sound Block B, please specify if it will be installed in a Sound Block A board. If Sound Block B is being installed in a Enhanced Resident Sound Block it is only necessary to plug the chips in the sockets specified.
Note: When updating units to Version 3.1 without sampling. be sure to remove the old Version 2 or 2.2 EPROMs at locations U35 and
~
2.8 - August, 1986
Version 3.2 software--purchased option QLS--purchased option
Sound Block C (Classical Block)--purchased option
Kurzweil 250 Service Manual, Chapter 2
2 - 8
To install Version 3.2 in units that currently have Version 3.1, no modifications will be required to the CPU board. Simply remove the Version 3.1 EPROMs and install Version 3.2~ To install Version 3.2 in units with software levels earlier than Version 3.1, the CPU board will require modification as mentioned in the description of Version 3.1. The Version 3.2·EPROMs should be installed in the following locations:
82102001 |
U54, |
82102101 |
U38 |
82102201 |
U53 |
82102301 |
U37 |
82102401 |
U52 |
82102501 |
U36 |
82090701* |
U51 |
82090801* |
U35 |
*50kHz Sound Modeling EPROM locations
Version 3.2 is required to install QLS.QLS contains a p.c. board, Macintosh disk and cable. The installation of the QLS p.C. board requires removing the parallel port chip in location U108 on the CPU board. The QLS p.c. board is plugged into the empty socket at U108 and supported with mounting hardware. It is a fairly simple
installation, however, the pins on the |
solder side |
of the QLS p.c. |
|
board may break off if |
bent. |
|
|
Sound Block C |
may be installed |
on a Sound |
Block A board or |
the Enhanced Resident Sound Block. Note: if the unit currently has a Sound Block A board with Sound Block B installed it is not possible to add Sound Block C. If Sound Block C is being installed on a Sound Block A board be sure that there are sockets for the chips. These sockets are supplied with the kit if ordered properly. Kurzweil does not recommend that these chips are soldered into the Sound Block A board. Therefore, when ordering a Sound Block C, please specify if it will be installed in a Sound Block A board. If Sound Block C is being installed in a Enhanced Resident Sound Block, it is only necessary to plug the chips in the sockets specified.
Note: QLS may not be installed in units that do not have sampling.
Note: When updating units to Version 3.2 without sampling. be sure to remove the o~d Version 2 or 2.2 EPROMs at locations U35 and U51.
Kurzwell 250 Service Manual, Chapter 2
2 - 9
2.9 - December, 1986
Version 4'software--purchased option Superam I or Superam II--purchased option* *requires Enhanced Resident Sound Block
Sound Block D (Brass Block)--purchased option
To install Version 4 in units that currently have Version 3.1 or 3.2, no modifications will be required to the CPU board. Simply
remove |
the |
Version |
3.1 or |
3.2 |
EPROMs and install Version 4. |
To |
|
install |
Version |
4 in |
units |
with |
software levels earlier than Version |
||
3.1 or |
3.2, |
the |
CPU |
board |
will |
require modification as mentioned |
in |
the description of Version 3.1. The Version 4 EPROMs should be installed in the following locations:
82102601 |
U54 |
82102701 |
U38 |
82102801 |
U53 |
82102901 |
U37 |
82103001 |
U52 |
82103101 |
U36 |
82091001* |
U51 |
82091101* |
U35 |
*50kHz Sound Modeling EPROM locations
Version 4 is required to install Superam. Superam is installed on the CGP board. It requires the Enhanced Resident Sound Block (new CGP). Superam is installed by adding mounting hardware to the CGP and inserting connecting cables from the Superam board into the CGP board.
Sound Block D may be installed on a Sound Block A board or the Enhanced Resident Sound Block. Note: if the unit currently has a Sound Block A board with Sound Blocks B or C installed it is not possible to add Sound Block D. If Sound Block D is being installed on a Sound Block A board be sure that there are sockets for the chips. These sockets are no longer supplied with the Sound Block 0 kit, please order separately from Kurzweil. Kurzweil does not recommend that these chips are soldered into the Sound Block A board. Therefore, when ordering a Sound Block D, please specify if it will be installed in a Sound Block A board. If Sound Block D is being installed in a Enhanced Resident Sound Block, it is only necessary to plug the chips in the 1sockets specified.
Note: When updating units to Version 4 without sampling. be
Kurzweil 250 Service Manual, Chapter 2
2 - 1 0
sure to remove the old Version 2 or 2.2 EPROMs at locations U35 and U51.
2.10 - March, 1987--RMX introduced
Part No. 10004701--RMX 225, old-style CGP and Sound Blocks A and B
Part No. 10004801--RMX 225, new-style CGP, no Sound Blocks
Part No. 10004801--RMX 250, new style CGP and Sound Blocks A through D
Note: These units also contained the RAM Sequencer Expansion, 50kHZ Sound Modeling Program and QLS as standard.
2.11- April, 1987
Version 4.1 software--purchased option
To install Version 4.1 in units that currently have Version 3.1, 3.2 or V4; no modifications will be required to the CPU board. Simply remove the Version 3.1, 3.2 or V4 EPROMs and install Version 4. To install Version 4.1 in units with software levels earlier than Version 3.1, 3.2 or 4, the CPU board will require modification as mentioned in the description of Version 3.1. The Version 4.1
EPROMs should |
be installed |
in the following locations: |
|
82103201 |
U54 |
82103301 |
U38 |
82103401 |
U53 |
82103501 |
U37 |
82103601 |
U52 |
82103701 |
U36 |
82091201* |
U51 |
82091301* |
U35 |
*50kHz Sound Modeling EPROM locations
Kurzwell 250 Service Manual, Chapter 2
2 - 1 1
2.12 - October, 1987
Version 5- software--purchased option
Separate Outputs (S/O)--purchased option*
*RMX version of S/O available as of June 1988. |
|
|
|
||||||
To |
install |
Version |
5 in units that currently have |
Version |
4.2, |
||||
4.1, 4.0, 3.2 or 3.1; no |
modifications |
will be |
required |
to the |
CPU |
||||
board. |
Simply |
remove |
the |
current |
version |
EPROMs |
and |
install |
|
Version |
5. To |
install Version |
5 in units with |
software |
levels |
earlier |
|||
than versions mentioned above, the CPU board will require modification as mentioned in the description of Version 3.1. The
Version 5 EPROMs |
should be |
installed in |
the |
following |
locations: |
82104401 |
U54 |
82104501 |
U38 |
||
82104601 |
U53 |
82104701 |
U37 |
||
82104801 |
U52 |
82104901 |
U36 |
||
82091801* |
U51 |
82091901* |
U35 |
||
*50kHz Sound Modeling EPROM locations |
|
|
|||
Version 5 IS |
required |
to install |
S/O. |
S/O |
for the K250 |
contains 2 p.c. boards, Macintosh disk, a new rear panel and cable assembly. The S/O kit for the RMX contains a p.c. board, Macintosh disk, 12-output box and cable assembly.
2.13 - September, 1988
Version 6--purchased option
RAM cartridge--purchased option
RAM cartridge adapter--purchased option
To install Version 6 in units that currently have Version 5.0 4.2, 4.1, 4.0, 3.2 or 3.1; no modifications will be required to the CPU board. Simply remove the current version EPROMs and install Version 6. To install Version 6 in units with software levels earlier than versions mentioned above, the CPU board will require modification as mentioned in the description of Version 3.1. The Version 6 EPROMs 1 should be installed in the following locations:
Kurzwell 250 Service Manual, Chapter 2
2 - 1 2
82105001 |
U54 |
82105101 |
U38 |
82105201· |
U53 |
82105301 |
U37 |
82105401 |
U52 |
82105501 |
U36 |
82092001* |
U51 |
82093001* |
U35 |
*50kHz Sound Modeling ERPOM locations
The RAM cartridge is external to the unit and is only
available |
for the K250. The RAM cartridge adapter is installed in |
the K250 |
on the CGP board. |
Kurzwell 250 Service Manual, Chapter 2
2 - 1 3
2.14- SOFTWARE VERSIONS VERSUS OPTIONS AVAILABLE
2.14.1- Version 2'
Sound Block A |
-optional |
Ram Sequencer Expansion (8K) |
-optional |
25kHz Sound Modeling Program |
-optional |
MacAttach |
-optional |
2.14.2 - Version 2.2 |
|
Sound Block A |
-optional |
Ram Sequencer Expansion (8K) |
-optional |
50kHz Sound Modeling Program |
-optional* |
MacAttach |
-optional |
*50kHz sampling required for Version 2.2.
2.14.3 - Version 3.1 |
|
Sound Block A |
-optional* |
Sound Block B (Rock Block) |
-optional* |
Sound Block C (Classical Block) |
-optional* |
Sound Block D (Brass Block) |
-optional* |
Enhanced Resident Sound Block |
-optional* |
50kHz Sound Modeling Program |
-optional |
Ram Sequencer Expansion (8K) |
-required** |
MacAttach |
-optional |
*Units with Sound Block A boards may have either Sound Block B or C added. Should a customer desire to add Sound Block Band C, the customer would have to have the Enhanced Resident Sound Block installed as there is only room for one additional sound block to the Sound Block A board.
**The Ram Sequencer Expansion bringing the unit from a 4K sequencer memory to 8K sequencer memory is required with
the installation of Version 3.1; because version 3.1 brings the sequenc~r memory to 12K.
Kurzwell 250 ServIce Manual, Chapter 2
2 - 1 4
Note: The Enhanced Resident Sound Block can only be installed in units with Version 3.1 software or better. Therefore units that currently have Version 2 or 2.2 must be updated when ordering the Enhanced Resident Sound Block.
Note: When installing the Enhanced Resident Sound Block in units with sampling, be sure to remove the 20 DRAMs from the old CGP and reinstall them in the Enhanced Sound Block. If the unit has a Sound Block A board with the 10 Sound Block A chips socketed, the chips may be removed and installed in the Enhanced Resident Sound Block (see Enhanced Resident Sound Block Configuration list).
2.14.4 - Version 3.2 |
|
Sound Block A |
-optional* |
Sound Block B (Rock Block) |
-optional* |
Sound Block C (Classical Block) |
-optional* |
Enhanced Resident Sound Block |
-optional* |
50kHz Sound Modeling Program |
|
Ram Sequencer Expansion (8K) |
-required** |
QLS (Quick Load System) |
-optional*** |
MacAttach |
|
*Units with Sound Block A boards may have either Sound Block B, C or D added. Should a customer desire to add Sound Block B, C or D the customer would have to have the Enhanced Resident Sound Block installed as there is only room for one additional sound block to the Sound Block A board.
**The Ram Sequencer Expansion bringing the unit from a 4K sequencer memory to 8K sequencer memory is required with the installation of Version 3.1; because version 3.1 brings the sequencer memory to 12K.
***QLS may only be installed in units with sampling.
Kurzwell 250 Service Manual, Chapter 2
2 - 1 5
Note: The Enhanced Resident Sound Block can only be installed in units with Version 3.1 or better. Therefore units that currently have Version 2 or 2.2 must be updated when ordering the Enhanced Resident Sound Block.
Note: When installing the Enhanced Resident Sound Block in units with sampling, be sure to remove the 20 DRAMs from the old CGP and reinstall them in the Enhanced Sound Block. If the unit has a Sound Block A board with the 10 Sound Block A chips socketed, the chips may be removed and installed in the Enhanced Resident Sound Block (see Enhanced Resident Sound Block Configuration list).
2.14.5 - Version 4 & 4.1
Sound Block A |
-optional* |
Sound Block B (Rock Block) |
-optional* |
Sound Block C (Classical Block) |
-optional* |
Sound Block D (Brass Block) |
-optional* |
Enhanced Resident Sound Block |
-optional* |
50kHz Sound Modeling Program |
|
Ram Sequencer Expansion (8K) |
-required** |
QLS (Quick Load System) |
-optional*** |
MacAttach |
|
Superam I or Superam II |
-optional |
*Units with Sound Block A boards may have either Sound Block B, C or 0 added. Should a customer desire to add Sound Block B, C or D the customer would have to have the Enhanced Resident Sound Block installed as there is only room for one additional sound block to the Sound Block A board.
**The Ram Sequencer Expansion bringing the unit from a 4K sequencer memory to 8K sequencer memory is required with the installation of Version 3.1; because version 3.1 brings the sequencer memory to 12K.
***QLS may only be installed in units with sampling.
1
Kurzweil 250 Service Manual, Chapter 2
2 - 1 6
Note: The Enhanced Resident Sound Block caf! only be installed in units with Ve,rsion 3.1 or better. Therefore units that currently have Version'2 or 2.2 must be updated when ordering the Enhanced Resident Sound Block.
Note: When installing the Enhanced Resident Sound Block in units with sampling, be sure to remove the 20 DRAMs from the old CGP and reinstall them in the Enhanced Sound Block. If the unit has a Sound Block A board with the 10 Sound Block A chips socketed, the chips may be removed and installed in' the Enhanced Resident Sound Block (see Enhanced Resident Sound Block Configuration list).
2.14.6 - Version 5 |
|
Sound Block A |
-optional* |
Sound Block B (Rock Block) |
-optional* |
Sound Block C (Classical Block) |
-optional* |
Sound Block 0 (Brass Block) |
-optional* |
Enhanced Resident Sound Block |
-optional* |
50kHz Sound Modeling Program |
|
Ram Sequencer Expansion (8K) |
-required** |
QLS (Quick Load System) |
-optional*** |
MacAttach |
|
Superam I or Superam II |
-optional |
Separate Outputs |
-optional |
*Units with Sound Block A boards may have either Sound Block B, C or 0 added. Should a customer desire to add Sound Block B, C or 0 the customer would have to have the Enhanced Resident Sound Block installed as there is only room for one additional sound block to the Sound Block A board.
**The Ram Sequencer Expansion bringing the unit from a 4K sequencer memory to 8K sequencer memory is required with the installation of Version 3.1; because version 3.1 brings the sequencer memory to 12K.
***QLS may only be installed in units with sampling.
Kurzwell 250 Service Manual, Chapter 2
2 - 1 7
Note: The Enhanced Resident Sound Block can on'ly be installed in units with V~rsion 3.1 or better. Therefore units th'atcurrently have Version'2 or 2.2 must be updated when ordering the Enhanced Resident Sound Block.
Note: When installing the Enhanced Resident Sound Block in
units with sampling, be sure to |
remove the 20 DRAMs from |
the old CGP and reinstall them |
in the Enhanced Sound Block. |
If the unit has a Sound Block A board with the 10 Sound Block A chips socketed, the chips may be removed and installed in the Enhanced Resident Sound Block (see Enhanced Resident Sound Block Configuration list).
2.14.7 - Version 6 |
|
Sound Block A |
-optional* |
Sound Block B (Rock Block) |
-optional* |
Sound Block C (Classical Block) |
-optional* |
Sound Block D (Brass Block) |
-optional* |
Enhanced Resident Sound Block |
-optional* |
50kHz Sound Modeling Program |
|
Ram Sequencer Expansion (8K) |
-required** |
QLS (Quick Load System) |
-optional*** |
MacAttach |
-obsolete***** |
Superam I or Superam II |
-optional |
Separate Outputs |
-optional |
RAM Cartridge and Adapter |
-required**** |
*Units with Sound Block A boards may have either Sound Block B, C or D added. Should a customer desire to add Sound Block B, C or D the customer would have to have the Enhanced Resident Sound Block installed as there is only room for one additional sound block to the Sound Block A board.
**The Ram Sequencer Expansion bringing the unit from a 4K sequencer memory to 8K sequencer memory is required with the installation of Version 3.1; because version 3.1 brings
the sequencer memory to 12K.
1
***QLS may only be installed in units with sampling.
Kurzweil 250 Service Manual, Chapter 2
2 - 1 8
****Version 6 is required to use the RAM Cartridge in the K250.
*****MacAttach is no longer available when the K250 is upgraded to Version 6.
Note: The Enhanced Resident Sound Block can only be installed in units with Version 3.1 or better. Therefore units that currently have Version 2 or 2.2 must be updated when ordering the Enhanced Resident Sound Block.
Note: When installing the Enhanced -Resident Sound Block in units with sampling, be sure to remove the 20 DRAMs from the old CGP and reinstall them in the Enhanced Sound Block. If the unit has a Sound Block A board with the 10 Sound Block A chips socketed, the chips may be removed and installed in the Enhanced Resident Sound Block (see Enhanced Resident Sound Block Configuration list).
Kurzwell 250 Service Manual, Chapter 2
2 - 1 9
2.15- SOUND BLOCK POSITIONING FOR ENHANCED RESIDENT SOUND BLOCK
,-
l
Sound Block A |
KMSI Part Number |
Location |
|
82018001 |
U85 |
|
82018101 |
U84 |
|
82018201 |
U83 |
|
82018301 |
U82 |
|
82018401 |
U80 |
|
82018501 |
U79 |
|
82018601 |
U78 |
|
82018701 |
U77 |
|
82018801 |
U86 |
|
82018901 |
U81 |
Sound Block B |
82019001 |
U65 |
|
82019101 |
U64 |
|
82019201 |
U63 |
|
82019301 |
U62 |
|
82019401 |
U60 |
|
82019501 |
U59 |
|
82019601 |
U58 |
|
82019701 |
U57 |
|
82019801 |
U66 |
|
82019901 |
U61 |
Sound Block C |
82022001 |
U47 |
|
82022101 |
U46 |
|
82022201 |
U45 |
|
82022301 |
U44 |
|
82022401 |
U43 |
|
82022501 |
U42 |
|
82022601 |
U41 |
|
82022701 |
U40 |
|
82022801 |
U39 |
|
82022901 |
U38 |
Kurzwell 250 Service Manual, Chapter 2
2· 20
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