Kurzweil Service manual

TABLE OF CONTENTS

Chapter 1, Introduction to Kurzweil 1000 Test Supervisor

1 .1 Using the Kurzweil 1000 Test Supervisor 1 -2

Chapter 2, Test Procedures

2.1 1000 PX, HX, SX and GX Tests 2 -2

2.2 1000 EX, and PX Plus Tests 2- 8

2.3 K1000 Tests 2- 1 4

2.4 EGP and Mark III Tests 2- 20

2.5 Menu Selections, Main Menu 2 -26

2.6 Menu Selections, Test Select Menu 2- 27

2.7 Menu Selections, Configuration Menu 2- 28

2.8 Sine Wave Tests (PX, PX Plus, EX, K1000, 2- 29

EGP and Mark III

2.9 Sine Wave Tests (Hx, SX and GX) 2- 30

Chapter 3, Explanation of Menu Items

3.1 Main Menu 3- 2

3.2 Test Select Menu 3 -5

3.3 Configuration Menu 3 -9

Chapter 4, Explanation of Error Messages

4.1 Error Messages 4 -2

4.2 Sine Wave Errors 4 -11

4.3 Sine Wave Errors/Probable Causes 4- 1 3

4.4 T est Mode Error Messages 4 -1 6

4.5 Error Statistic Messages 4 -2 1

Chapter 5, Basic Troubleshooting

5.1 What To Do When Nothing Appears To Work 5 -2

Chapter 6, Assembly/Disassembly Procedures

6.1 Kurzweil 1000 Series Racks 6 -2

6.2 Kurzweil K1000 6-6

6.3 Kurzweil Ensemble Grande Piano 6 -1 1

6.4 Kurzweil Mark III 6 –17

Chapter 7, Parts Lists

7.1 1000 Rack P .C. Board Assemblies 7 -2

7.2 Miscellaneous Cables and Components 7 -2

7.3 Power Supply, 1000 Rack Series 7 -3

7.4 1000 Rack CPU Board 7- 4

7.5 1000 Rack Front Panel Board 7 -6

7.6 1000 Rack Front Panel Board (EX only) 7 -6

7.7 1000 Keyboard Series P .C. Board Assemblies 7 -7

7.8 Miscellaneous Components 7 -7

7.9 K1000/EGP/Mark III CPU Board 7- 8

7.10 K1000/EGP/Mark III Keyscan Board 7-10

7.11 K1000 Power Supply Board 7- 1 1

7.12 EGP/Mark III Power Amp/Power Supply Board 7 -12

7.13 Mark III Secondary Power Amp Board 7 -13

7.1 4 1000 Keyboard Series Volume Slider Board 7- 1 3

7.1 5 1000 Keyboard Series Control Panel Board 7 -1 3

Chapter 8, Schematics

Schematic, K1000 Volume Slider 8 -2

Schematic, K1000 Front Panel 8 -3

Schematic, EGP and Mark III Front Panel 8- 4

Schematic, K1000, EGP and Mark III CPU, 1-4 8 -5

Schematic, K1000, EGP and Mark III CPU, 2-4 8- 6

Schematic, K1000, EGP and Mark III CPU, 3-4 8 -7

Schematic, K1000, EGP and Mark III CPU, 4-4 8 -8

Schematic, K1000, EGP and Mark III Keyboard Scan 8 -9

Schematic, K1000, Power Supply 8 -1 0

Schematic, K1000 and EGP AC Board 8 -11

Schematic, EGP and Mark III Power Supply/Power Amplifier 8 -1 2

Schematic, Mark III Power Amplifier 8 -1 3

Schematic, Mark III AC Board 8 -14

Schematic, Front Panel Board (EX) 8 -1 5

Schematic, Front Panel Board (1000 Rack) 8 -1 6

Schematic, CPU Board (1000 Rack), 1-4 8- 1 7

Schematic, CPU Board (1000 Rack), 2-4 8- 1 8

Schematic, CPU Board (1000 Rack), 3-4 8 -19

Schematic, CPU Board (1000 Rack), 4-4 8- 20

Schematic, Power Supply Board (1000 Rack) 8 -2 1

Assembly, Power Supply Board (1000 Rack) 8 –22

KURZWEIL MUSIC SYSTEMS, INC.

411 Waverley Oaks Road

Waltham, MA 02154

January,1989

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 the operation

of the equipment and maintenance 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.

Kurzweil1000 Series Service Manual

THE KURZWEIL 1000 SERIES TEST SUPERVISOR

INTRODUCTION

Chapter 1

1 .1 USING THE KURZWEIL 1000 TEST SUPERVISOR 1 -3

Figure 1.0.1, 1000 PX, HX, SX and GX 1 -3

Figure 1.0.2, 1000 EX and PX Plus 1 -3

Figure 1.0.3, K1000 1 -4

Figure 1.0.4, EGP and Mark III 1 -4

Introduction To the Kurzweil Test Supervisor

The Kurzweil 1000 Series have built-in diagnostic tests which can be run by pressing two buttons when turning the unit on. The Kurzweil 1000 PX, EX, HX, SX, GX, PX Plus, K1000, EGP and Mark III benefit from having basically the same tests and the same Diagnostic Supervisor for all units. Minor variations exist in the Kurzweil 1000 Test Supervisor due to the addition of the keyboard and differences in front panels for

the K1000, EGP and the Mark III.

The Kurzweil 1000 Test Supervisor is menu driven, and has three menus: the Main Menu, Test Select Menu, and the Configuration Menu.

Note:

The Selections "RUN ALL TESTS," "RUN SELF TESTS," and "RUN RAM TEST" will clear all user programs stored in RAM. If there are any valuable user programs that must be kept, one must store them on disk before running diagnostics. This is done by using the Kurzweil Object Mover program with a computer.

1.1 -Using the Kurzweil 1000 Test Supervisor

Some of the Kurzweil 1000 Series of products use different front panel commands in order to invoke the diagnostics, scroll through menus, select numbers of passes, and enter these choices. The professional expander products, Kurzweil 1000 PX, PX Plus, HX, SX, and GX, all use the same buttons on the front panel. In these units the buttons follow a very logical pattern, and the buttons are clearly labeled on the front panel silk screen as to their function. The other 1000 products follow a less intuitive pattern. The Front Panel buttons for each of the Kurzweil 1000 Series products and their diagnostic functions are listed below:

Figure 1.0.1 - 1000 PX, HX, SX, GX

Figure 1.0.2 – 1000 EX and PX Plus

Figure 1.0.3 - K1000

Figure 1.0.4 – EGP and Mark III

The diagnostics are entered by pushing two buttons, while turning the power on. The buttons must be held down the entire time, until the display “KURZWEIL 1000 TEST SUPERVISOR" appears in the front panel display.

The two buttons that are pushed are " P r o g r a m / Parameter Down," and "Program/Parameter Up" on the 1000 PX, HX, SX, and GX. The other units in the Kurzweil 1000 Series use different buttons which are shown in the diagrams above. Once the 1000 Test Supervisor is running, the next display that should come up will be: "XTEST MAIN MENU >RUN ALL TESTS."

This is the first selection item in the Main Menu.

The operation of the Diagnostic Supervisor is based on simple commands: Menu Up, Menu Down, # of Passes Up, # of Passes Down, Cancel (No), and Go (Yes).

In order to select a certain test or function, you must push the Menu Up or Menu Down buttons to find the specific test you wish to run. If the test is not in the menu you are currently in, you may select a different menu. Once the specific menu item is located, it can be selected by pushing Go (Yes).

When test(s) have been selected, the unit will prompt the user with the display

"NUMBER OF PASSES >001."

The user then has the choice of running the test(s) any number of times from 1 to 255, or infinity. To change the number of passes, push the # (of Passes) Up, or # (of Passes) Down buttons. Once the number of passes has been selected, push the Go (Yes) button and testing will start. In order to cancel a selection, push cancel (No). To stop tests from running, push cancel during the running of a test until the LCD display goes blank.

The 1000 Test Supervisor has three menus: the Main Menu, Test Select Menu, and the Configuration Menu. The Main Menu contains items that let the user run batteries of tests, and commonly used individual tests. In the Main Menu you can also select one of the other two menus, or to exit the test supervisor to return the unit to normal operation.

The Test Select Menu contains a list of all the individual tests that can be run. Only one test can be run at a time from the Test Select Menu. The Test Supervisor is designed so that if a test fails when running a battery of tests, the individual test that failed can be selected from the Test Select Menu. The last entries in the Test Select Menu allow the user to select either of the other two menus.

The Configuration Menu allows the user to configure the diagnostics to allow oscilloscope debugging, and to tailor a selection of error message display types to suit ones individual taste or purpose.

One of the choices you are allowed to make is the amount of time that error messages are displayed. This can be varied from a few microseconds (to allow tests to run more frequently and provide a brighter scope trace), to an indefinite hold cancelled by a push of any button. The user can also choose any combination of three types of error message displays: Text Mode, Data Mode, and Bad Bits Mode. Text Mode displays a textual message describing the error that occurred, and the "U" number of the device that failed. Data Mode displays the Address, Expected Data, and Observed Data, or the Expected and Observed Checksums. Bad Bits mode displays the Address or Data bits that failed. The last two entries in the Configuration Menu allow the user to select either of the other two menus.

Kurzweil1000 Series Service Manual