Kurzweil K2600 Series Service Manual
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Kurzweil K2600 Series Service Manual

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K2600 Series
Service Manual
©2003 All rights reserved. Kurzweil is a product line of Young Chang Co.; Kurzweil is a
trademark of Young Chang Co. All other products and brand names are trademarks or
registered trademarks of their respective companies. Product features and specifications
are subject to change without notice.
Part Number: 910396 Rev. A

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  • Page 1 K2600 Series Service Manual ©2003 All rights reserved. Kurzweil is a product line of Young Chang Co.; Kurzweil is a trademark of Young Chang Co. All other products and brand names are trademarks or registered trademarks of their respective companies. Product features and specifications are subject to change without notice.
  • Page 2 The lightning flash with the arrowhead symbol, within an equilateral triangle is intended to alert CAUTION the user to the presence of uninsulated "dangerous voltage" within the product's RISK OF ELECTRIC SHOCK enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, The exclamation point within an equilateral...
  • Page 3 Young Chang Distributors Contact the nearest Young Chang office listed below to locate your local Young Chang/Kurzweil representative. A N D Music Corp. P.O. Box 99995 Lakewood, WA 98499-0995 Tel: (253) 589-3200 Fax: (253) 984-0245 Young Chang Akki Co., Ltd.

  • Page 5: Table Of Contents

    Kurzweil K2600 Series Service Manual Contents Contents Young Chang Distributors ............................... iii Chapter 1 Introduction Models ..................................1-1 Notes, Cautions, Warnings ............................. 1-1 K2600/X Rear Panel................................ 1-2 K2600R Rear Panel ................................1-2 Rear Panel Features................................. 1-3 All Models................................. 1-3 Keyboard Models only ............................1-3 Rack Models only..............................
  • Page 6 Kurzweil K2600 Series Service Manual Contents Sine Wave .................................. 2-9 Sound ROM ................................2-10 Sound RAM ................................2-10 1st NVRAM................................2-11 2nd NVRAM ................................2-11 Digital IO..................................2-11 Chapter 3 K2600R Disassembly/Assembly Introduction ..................................3-1 Saving User Data..............................3-1 Cables, Connectors..............................3-1 Tools Required ................................3-1 Opening the K2600R ...............................
  • Page 7 Kurzweil K2600 Series Service Manual Contents Chapter 4 K2600/K2600X Disassembly/Assembly Introduction ..................................4-1 Saving User Data..............................4-1 Notes, Cautions, Warnings ............................. 4-1 Cables, Connectors..............................4-1 Tools Required ................................4-1 Opening the K2600/K2600X............................4-2 K2600 Bottom................................4-2 K2600X Bottom ................................. 4-3 Removing the Top Enclosure..........................
  • Page 8 Kurzweil K2600 Series Service Manual Contents Connecting the Keyboard ............................. 4-23 Removing Keys ..............................4-24 Natural/White Key ............................4-24 Natural/White Keys.............................. 4-25 Sharp/Black Keys ..............................4-25 Replacing a Key..............................4-26 Servicing the Keyboard Contact Boards ......................4-26 Removing the Treble Contact Board ......................4-26 Replacing the Treble Contact Board ......................
  • Page 9 Kurzweil K2600 Series Service Manual Contents Alpha Wheel ................................5-6 K2600 Keyboard Models ............................5-7 Front Panel Sliders ..............................5-7 Wheels ..................................5-7 Small Ribbon................................5-8 Large Ribbon................................5-8 Keyboard ................................... 5-8 Switch Pedals 1, 2, 3, and 4 ............................. 5-8 CC Pedals 1 and 2 ..............................
  • Page 10 Kurzweil K2600 Series Service Manual Contents Phone & Volume Assembly, N012401127......................6-8 AC Entry Module Assembly, N012104121 ......................6-8 Power Supply Board, N012304340 ........................6-8 Front Panel/Scanner Board, N012305417......................6-10 Final Assembly, N012000134 ..........................6-11 K2600 Series Keyboard Models........................... 6-13 Audio Board, N012305611............................. 6-13 Button Board, N012304344............................
  • Page 11 Kurzweil K2600 Series Service Manual Contents Front Panel Board (keyboard models)–Buttons and LEDs ..................7-27 Slider Board (keyboard models) ..........................7-28 Scanner Board (keyboard models)–Scanner Kybd I/F, Play I/F (1 of 2) .............. 7-29 Scanner Board (keyboard models)–Power, Dig I/O (2 of 2) ................... 7-30 Player Control Board (keyboard models)–Player Control Interface..............
  • Page 12 Kurzweil K2600 Series Service Manual Contents viii...

  • Page 13: Chapter 1 Introduction

    For in-depth descriptions of the many features the K2600 Series instruments include, consult the Musician’s Guide. This chapter also includes a description of the models available in the K2600 Series and a description of the symbols used throughout this manual.

  • Page 14: K2600/X Rear Panel

    K2600/X Rear Panel Optical Analog Outputs Inputs Bal/Unbal Headphones Optical Kurzweil Digital Outputs Analog Analog Inputs Kurzweil I/O Digital I/O Analog Outputs Bal/Unbal 100/120V ~ F2.0A 250V slow-blow Left (mono) 230/240V ~ F1.0A 250V slow-blow Optical Optical KDS Out DMTi In...

  • Page 15: Rear Panel Features

    MIDI Select switch, a slide switch to select the operation of the Thru/Out port. • Kurzweil I/O, use these serial ports to send or receive the Kurzweil KDS format. • Digital I/O, use these XLR jacks to send or receive digital information.

  • Page 16: K2600/X Front Panel

    Introduction K2600/X Front Panel K2600/X Front Panel Data Entry Chan/Bank Layer/Zone + / - Clear UPPER/lower Space Edit Exit Cancel Enter Exit Exit button button Chan/Bank Alphanumeric Alpha Wheel, button LCD, buttons Minus, Plus Cursor soft buttons Layer/Zone buttons buttons button Figure 1-3 Data Entry Section...

  • Page 17: Front Panel Features

    Introduction Front Panel Features Front Panel Features All Models • LCD, backlit graphic display • Soft buttons, use these buttons to select an action or item shown directly above a button in the LCD. • Cursor buttons, use these buttons to navigate through the LCD. •...

  • Page 18: K2600R Front Panel

    Introduction K2600R Front Panel K2600R Front Panel Alpha wheel, LCD and Minus (–) and Soft buttons Optical Plus (+) buttons (below) Chan/Bank, Alphanumeric Exit Layer/Zone Cursor buttons button buttons buttons Data Entry Inputs Optical Chan/Bank Lo Z Layer/Zone Left MIDI LED MIDI LED + / - Clear...

  • Page 19: Chapter 2 Diagnostics

    Chapter 2 Diagnostics Diagnostic Tests Test Name Description Tests the LCD Engine Blk Tests the Operating System (installed in FlashROM) Object Blk Tests the Setups (installed in FlashROM) RAM/PRAM Tests the RAM (volatile, non-volatile and expansion) I/O Port Tests the Microcontroller’s port pins FDD Init Tests the Floppy Disk Drive controller Scanner...

  • Page 20: Entering Diagnostics

    Diagnostics Entering Diagnostics Entering Diagnostics 1. Apply power to the unit. When the message appears in the LCD, Please wait... quickly press and release the Exit button. The LCD shows the following: ------ K2600 Boot Loader v1.00 ------ Install System Hard Reset Install Objects Run Diags...

  • Page 21: Test Results

    Diagnostics Diagnostic Test Menus Test Results At the completion of an individual test, the LCD displays the results of the test. Figure 2-3 shows an example of the display for the Engine Blk test. Test Item : Engine Blk Please wait. Testing...Success Press any key to continue...

  • Page 22: Description Of Tests

    Diagnostics Description of Tests Description of Tests This test writes a group of characters to the LCD and verifies that the same characters can be read back again. The LCD Test includes four test phases that run automatically. The four steps include the following: 1.

  • Page 23: Ram/Pram

    Diagnostics Description of Tests RAM/PRAM Caution: This test destroys all non-volatile user RAM! If you haven’t already saved user data, power cycle the unit and save the data now. If you need instructions, refer to Saving User Data on page 5-2. The RAM/PRAM test performs a data test and an address test on each of the processor RAM sections.

  • Page 24: Fdd Init (Floppy Disk Drive Initialize)

    Diagnostics Description of Tests FDD Init (Floppy Disk Drive Initialize) Note: Insert a blank formatted disk into the floppy disk drive before running this test! The FDD Init test recalibrates the disk drive. A failure of this test may indicate a problem with the connection between the floppy drive and the Engine Board, the floppy drive, or floppy drive’s controller (U9 on the Engine Board).

  • Page 25: Scsi

    Failure of this test may indicate a problem with SCSI ID settings, a fault of the SCSI device or connection, or a problem on the Engine Board. Note: For more information on SCSI configurations and guidelines, refer to the K2600 Series Musician’s Reference and Musician’s Guide.

  • Page 26: Lisa

    Diagnostics Description of Tests Lisa • Lisa microcode RAM (only Engine Board Lisa), not optional Failure of this test generally indicates a problem on the DSP Board; it should be replaced. Sampling Opt (Sampling Option) Figure 2-7 illustrates the full menu of sampling option tests. To display this page, select Sampling Option from the main menu and use the Up or Down button or the Alpha Wheel to scroll through the menu options.

  • Page 27: Test Digital-Sampling Circuitry

    These sine waves are not sampled, but are merely used to generate digital data with which to test the digital audio circuitry. Note: For more information on sampling, refer to the K2600 Series Musician’s Reference and Musician’s Guide. Sine Wave This test produces six sine waves to confirm the clarity of each sine wave.

  • Page 28: Sound Rom

    Diagnostics Description of Tests Sound ROM The Sound ROM test performs a checksum of each megabyte of Sound ROM. The computed checksum is compared to the checksum stored in ROM. The asterisk groups displayed in the LCD change to at the completion of each PASS FAIL sound block test.

  • Page 29: 1St Nvram

    Diagnostics Description of Tests 1st NVRAM Caution: This test destroys all non-volatile user RAM! If you haven’t already saved user data, power cycle the unit and save the data now. If you need instructions, refer to Saving User Data on page 5-2.
  • Page 30 Diagnostics Description of Tests 2-12...

  • Page 31: K2600R Disassembly/Assembly

    Chapter 3 K2600R Disassembly/Assembly Introduction The chapter contains all the procedures for the disassembly and assembly of the K2600R instruments including factory-installed and after-market options. In some instances a procedure may instruct you to remove a cable from an after-market option board or device that may not be present.

  • Page 32: Opening The K2600R

    K2600R Disassembly/Assembly Opening the K2600R Opening the K2600R Removing the Top Cover Before you begin disassembly, please be sure that the power is off, and that the AC cord and all other cables are disconnected. 1. The top cover is secured to the K2600R with ten screws: four screws on each side of the unit and two screws on the rear.

  • Page 33: Removing The Audio Board

    K2600R Disassembly/Assembly Opening the K2600R Removing the Audio Board 1. Disconnect the cables listed in Table 3-1. All flat ribbon cables use cable locking clips that secure the cables to the connectors. Remove the cable locking clip from the flat ribbon cable on the Audio Board. Be sure to set it safely aside so that you can reinstall it when you reconnect the cable.

  • Page 34: Replacing The Digital I/O Option Board

    K2600R Disassembly/Assembly Opening the K2600R Ref. Name Cable Type Destination J1001 Digital I/O to DSP flat ribbon DSP Board J1002 Sampling Bd. (SOB) shielded wire Sampling Board J1003 Sampling Bd. (SOB) shielded wire Sampling Board Table 3-2 K2600R Digital I/O Option Board cables 6.

  • Page 35: Replacing The Small Digital I/O Board

    K2600R Disassembly/Assembly Opening the K2600R Ref. Name Cable Type Destination J1201 Sampling Bd. (SOB) shielded wire Sampling Board J1205 Sampling Bd. (SOB) shielded wire Sampling Board Table 3-3 K2600R Small Digital I/O Board cables 5. Remove the Small Digital I/O Board. Replacing the Small Digital I/O Board 1.

  • Page 36: Replacing The Dsp Board

    K2600R Disassembly/Assembly Opening the K2600R 7. To release the DSP Board from the standoffs on the left side of the board, squeeze the top of the standoffs and slightly lift the left side of the DSP Board. 8. Once the DSP Board is free of the standoffs, lift the DSP Board straight up to disconnect the two 50-pin connectors from the CPU Board.
  • Page 37 K2600R Disassembly/Assembly Opening the K2600R 1. Follow the procedures previously described to remove the Audio Board, Digital I/O Option (if installed) or the Small Digital I/O Board, and the DSP Board. 2. Place the K2600R on its side. Hold the CPU holding bracket and remove the holding bracket screw from the bottom enclosure.

  • Page 38: Replacing The Cpu Board

    K2600R Disassembly/Assembly Opening the K2600R 6. Remove the two screws that secure the MIDI jacks to the rear panel. 7. Remove the four hex standoffs and flat washers that secure the SCSI ports to the rear panel. 8. Remove the screw that secures the CPU Board to the mounting post. 9.

  • Page 39: Removing The Power Supply Board

    K2600R Disassembly/Assembly Opening the K2600R 11. If the K2600R you are servicing has a Digital I/O Option, follow the procedure on page 3-4 to replace it. If the K2600R you are servicing has a Small Digital I/O Board, follow the procedure on page 3-5 to replace it. 12.

  • Page 40: Replacing The Transformer

    K2600R Disassembly/Assembly Opening the K2600R Replacing the Transformer 1. Position the transformer over the mounting holes provided for it on the bottom enclosure. 2. Install the four screws and split washers that secure the transformer to the bottom enclosure. 3. Connect the stranded wire cable that connects the Backlight Board to the Power Supply Board at location J104.

  • Page 41: Removing The Fan

    K2600R Disassembly/Assembly Opening the K2600R Removing the Fan 1. Disconnect the stranded wire cable that connects the fan to the Power Supply Board. 2. Remove the four screws that secure the fan to the rear panel. Each screw has one flat washer and one split lock washer.

  • Page 42: Front Panel Assembly

    K2600R Disassembly/Assembly Front Panel Assembly Front Panel Assembly Removing the Front Panel Cover 1. Place the K2600R on its side and remove the four screws along the bottom edge of the front panel cover. 2. Place the K2600R flat in its normal position. 3.
  • Page 43 K2600R Disassembly/Assembly Front Panel Assembly Figure 3-4 Front Panel Assembly, exploded view 3. Tilt the front of the K2600R up and remove the three screws along the bottom edge of the front panel mounting bracket. Caution: If the unit you are servicing has a Sampling Board installed, the hardware that secured it was removed during the removal of the front panel cover.

  • Page 44: Replacing The Front Panel Mounting Bracket

    K2600R Disassembly/Assembly Front Panel Assembly Replacing the Front Panel Mounting Bracket 1. Insert the front panel mounting bracket into the left side of the bottom enclosure. (This is done to clear the top cover mounting holes on the left side.) Then slide the right side of the front panel mounting bracket.

  • Page 45: Removing The Front Panel/Scanner Board

    K2600R Disassembly/Assembly Front Panel Assembly 8. Secure the two cables to the disk drive mounting bracket with the tape. 9. Connect the flat ribbon cable from the LCD Board to the CPU Board and install the locking cable clip. 10. Connect the two shielded wire cables from the Headphone/Volume Board to locations J612 and J615 on the Audio Board.

  • Page 46: Removing The Lcd Board

    K2600R Disassembly/Assembly Front Panel Assembly Removing the LCD Board To remove the LCD Board, it is necessary to first remove the front cover and Front Panel/Scanner Board. Follow the procedure on page 3-12 to remove the front cover and the procedure on page 3-15 to remove the Front Panel/Scanner Board.

  • Page 47: Replacing The Ac Entry Module

    K2600R Disassembly/Assembly Front Panel Assembly 5. Remove the two screws that secure the power switch to the Front Panel/Scanner Board, and push the power switch into the unit. 6. Remove the AC Entry Module. Replacing the AC Entry Module 1. Position the power switch through the opening provided for it on the Front Panel/Scanner Board, and install the two screws that secure it to the board.

  • Page 48: Removing The Hard Disk Drive

    K2600R Disassembly/Assembly Front Panel Assembly 2. Connect the flat ribbon and shielded wire cable to the floppy disk drive. Be sure to install the cable locking clip on the flat ribbon cable. 3. Standing at the front panel, tilt the front end of the disk drive mounting bracket down toward you and lower it into position.

  • Page 49: Replacing The Sampling Board

    K2600R Disassembly/Assembly Front Panel Assembly 2. From the Optical Inputs section of the front panel, remove the cap from the Optical jack. 3. Remove the nut and washer from Analog Input 1/4” jack. 4. Remove the four screws (use a #1 screwdriver) from the Analog Input XLR jacks. 5.
  • Page 50 K2600R Disassembly/Assembly Front Panel Assembly 3-20...

  • Page 51: K2600/K2600X Disassembly/Assembly

    Chapter 4 K2600/K2600X Disassembly/Assembly Introduction This chapter contains all the procedures for the disassembly and reassembly of both the 76-note K2600 and the 88-note K2600X—as well as instruments with factory-installed or after-market options. In some instances a procedure may instruct you to remove a cable from an after-market option board or device that may not be present.

  • Page 52: Opening The K2600/K2600X

    K2600/K2600X Disassembly/Assembly Opening the K2600/K2600X Opening the K2600/K2600X K2600 Bottom 1. Refer to Figure 4-1. Remove the enclosure support wall screws and the endblock locking bracket screws (not the endblock screws). Dotted lines indicate the locations of the enclosure support wall screws. Arrows show the locations of the endblock locking bracket screws.

  • Page 53: K2600X Bottom

    K2600/K2600X Disassembly/Assembly Opening the K2600/K2600X K2600X Bottom 1. Refer to Figure 4-2. Remove the enclosure support wall screws and the endblock locking bracket screws (not the endblock screws). Arrows show the locations of the enclosure support wall and endblock locking bracket screws. Note: Do not remove the five endblock screws at this point.

  • Page 54: Removing The Top Enclosure

    2. Remove the seven rear panel screws. These secure the rear panel portion of the top enclosure. 3. Remove the four endblock screws. Endblock screws Analog Inputs Kurzweil I/O Digital I/O Analog Outputs Bal/Unbal 100/120V ~ F2.0A 250V slow-blow Left (mono) 230/240V ~ F1.0A 250V slow-blow...

  • Page 55: Replacing The Top Enclosure

    K2600/K2600X Disassembly/Assembly Opening the K2600/K2600X Audio Board Figure 4-4 Top Enclosure, Audio Board location 6. Turn the top enclosure over and place it face down onto your work surface. Replacing the Top Enclosure 1. Lift the top enclosure up and place it in position over the bottom enclosure. Caution: Remember that the Audio Board extends beyond the rear panel.

  • Page 56: Top Enclosure

    K2600/K2600X Disassembly/Assembly Top Enclosure Top Enclosure The top enclosure includes five boards: Audio, Slider, Control Panel, LCD, and Backlight. The Disk Drive and the Power Entry Module are also located on the top enclosure. Figure 4-5 shows the placement of the boards, Disk Drive, and Power Entry Module. Figure 4-6 shows the top enclosure with the Digital I/O and Sampling Boards installed.

  • Page 57: Removing The Audio Board

    K2600/K2600X Disassembly/Assembly Top Enclosure Removing the Audio Board The Audio Board is mounted onto the rear panel portion of the top enclosure. 1. Disconnect the cables listed in Table 4-1. Ref. Name Cable Type Destination J601 flat ribbon CPU Board J602 Audio Power stranded...

  • Page 58: Removing The Digital I/O Option Board

    K2600/K2600X Disassembly/Assembly Top Enclosure Removing the Digital I/O Option Board 1. Following Steps 2 and 3 disconnect the cables listed in Table 4-2. Ref. Name Cable Type Destination J1001 Digital I/O to DSP flat ribbon DSP Board J1002 Sampling Bd. (SOB) shielded wire Sampling Board J1003...

  • Page 59: Replacing The Small Digital I/O Board

    K2600/K2600X Disassembly/Assembly Top Enclosure Replacing the Small Digital I/O Board 1. Position the board so that the Digital I/O and Optical jacks are aligned properly through the openings provided for them in the rear panel. 2. Install the four screws that secure the Digital I/O Out and In jacks to the rear panel. 3.

  • Page 60: Removing The Slider Board

    K2600/K2600X Disassembly/Assembly Top Enclosure 6. Place the enclosure support wall in position. Be sure that the mounting clip on the Sampling Board is positioned into the upper groove on the enclosure support wall. 7. Place the enclosure support wall in position and install the screws that secure it to the top enclosure.

  • Page 61: Removing The Lcd Board

    K2600/K2600X Disassembly/Assembly Top Enclosure position and tilt up the top enclosure. Press individual switch button caps to verify that their corresponding switches click. 3. Install the four screws that secure the Slider Board to the top enclosure. 4. Place the enclosure support wall in position and install the enclosure support wall screws. You should see thread marks in the extrusion to verify proper positioning of the enclosure support wall screws.

  • Page 62: Removing The Backlight Board

    K2600/K2600X Disassembly/Assembly Top Enclosure Removing the Backlight Board 1. Disconnect the stranded wire cable that connects the Backlight Board to the LCD Board. This cable is bent to form a loop. The loop portion is then inserted through a tie wrap that is affixed to the Backlight Board mounting plate.

  • Page 63: Removing The Control Panel Board

    K2600/K2600X Disassembly/Assembly Top Enclosure Removing the Control Panel Board 1. Follow the procedures on page 4-11 to remove the LCD and Backlight Boards. If the unit you are servicing has a Sampling Board, follow the procedure on page 4-9 to remove it. 2.
  • Page 64 K2600/K2600X Disassembly/Assembly Top Enclosure 5. Place the enclosure support wall in position. 6. Install the enclosure support wall screws. You should see thread marks in the extrusion to verify proper positioning of the enclosure support wall screws. Note: If you are servicing a K2600, there are seven screws securing the enclosure support wall.

  • Page 65: Bottom Enclosure

    K2600/K2600X Disassembly/Assembly Bottom Enclosure Bottom Enclosure Removing the Keyboard Scanner Board 1. All flat ribbon cables use cable locking clips to secure the cables to the connectors. Remove the cable locking clips from the flat ribbon cables at locations J704, J705, and J714 on the Keyboard Scanner Board.

  • Page 66: Replacing The Dsp Board

    K2600/K2600X Disassembly/Assembly Bottom Enclosure 1. Start with the standoffs on the left side of the board. Press the tabs of the standoffs away from the DSP Board and slightly lift the left edge of the DSP Board to clear the tabs. 2.

  • Page 67: Replacing The Cpu Board

    K2600/K2600X Disassembly/Assembly Bottom Enclosure 5. Remove the four hex standoffs and flat washers that secure the SCSI ports to the rear panel. 6. Remove the screw that secures the CPU Board to the mounting post. 7. The three nylon PC board standoffs that secure the CPU Board have tabs that clip over the top edge of the board.

  • Page 68: Replacing The Power Supply Board

    K2600/K2600X Disassembly/Assembly Bottom Enclosure 2. The Power Supply Board is secured to the bottom enclosure with four screws. Two screws are located at the left edge (as viewed standing at the keyboard) of the board; the other two are located at the heatsink mounting bracket. Remove these screws. 3.

  • Page 69: Replacing The Fan

    K2600/K2600X Disassembly/Assembly Bottom Enclosure Replacing the Fan 1. Place the fan in position over the standoffs provided for it on the bottom enclosure. Push the fan down so that the standoffs come up through the mounting holes of the fan. 2.

  • Page 70: Replacing The Mod Wheel Assembly

    K2600/K2600X Disassembly/Assembly Bottom Enclosure Note: If you are servicing a K2600, one flat flex cable attaches to the Mod Wheel Assembly, location J403. If you are servicing a K2600X, two flat flex cables attach to the Mod Wheel Assembly, locations J403 and J404. 3.

  • Page 71: K2600 Keyboard Assembly

    K2600/K2600X Disassembly/Assembly K2600 Keyboard Assembly K2600 Keyboard Assembly This section describes the removal and replacement of the K2600 (76-note) Keyboard Assembly. See page 4-28 for the corresponding procedures for the K2600X (88-note) Keyboard Assembly. Removing the K2600 Keyboard Assembly The following procedure assumes that the K2600 is open and that you have followed the instructions on page 4-4 to remove the top enclosure.

  • Page 72: Replacing The K2600 Keyboard Assembly

    K2600/K2600X Disassembly/Assembly K2600 Keyboard Assembly 6. Slide the K2600 back onto your work surface. 7. Lift the Mod Wheel Assembly and disconnect the Aftertouch flex cable. This cable has nylon reinforced tape securing it to the bottom enclosure. Peel back the tape from one side to free the cable.

  • Page 73: Disconnecting The K2600 Keyboard

    K2600/K2600X Disassembly/Assembly K2600 Keyboard Assembly Disconnecting the K2600 Keyboard Follow this procedure if you are merely replacing one or more keys. 1. Refer to Figure 4-8. 2. Tilt the K2600 up and remove the four keyboard rear screws, then lay the K2600 flat on your work surface.

  • Page 74: Removing Keys

    K2600/K2600X Disassembly/Assembly K2600 Keyboard Assembly Removing Keys The following procedure assumes you have removed the top enclosure from the K2600. 1. Follow the procedure for removing the keyboard (page 4-21) or disconnecting the keyboard (page 4-23.) 2. The following diagrams illustrate the outlines of the natural and sharp keys and the locations and functions of the components described in the following procedures.

  • Page 75: Natural/White Keys

    K2600/K2600X Disassembly/Assembly K2600 Keyboard Assembly Natural/White Keys 1. Each key has a spring located at the rear of the key. Using needle-nose pliers, slightly pull up the top portion of the spring to release it from the key. Caution: Be careful not to pull up too much, which could damage the spring. 2.

  • Page 76: Replacing A Key

    K2600/K2600X Disassembly/Assembly K2600 Keyboard Assembly Replacing a Key The following instructions apply to both natural and sharp keys. Note: Always replace a sharp key before replacing the adjacent natural keys. 1. Place the key on the keyboard chassis and lower the key into position. 2.

  • Page 77: Removing The Keyboard Contact Strips

    K2600/K2600X Disassembly/Assembly K2600 Keyboard Assembly Removing the Keyboard Contact Strips 1. Place the keyboard upside down on a flat soft surface. Be sure that the keys are resting on a soft surface to avoid scratching or other damage. 2. Follow the procedure for removing the Bass and Treble Keyboard Contact Boards on page 4-26.

  • Page 78: K2600X Keyboard Assembly

    K2600/K2600X Disassembly/Assembly K2600X Keyboard Assembly K2600X Keyboard Assembly Removing the K2600X Keyboard Assembly The following procedure assumes that the K2600X is open and that you have followed the instructions to remove the top enclosure. 1. The keyboard is secured to the bottom enclosure using nine screws. Refer to Figure 4-13 for the position of the screws.

  • Page 79: Replacing The K2600X Keyboard Assembly

    K2600/K2600X Disassembly/Assembly K2600X Keyboard Assembly Replacing the K2600X Keyboard Assembly 1. Place the keyboard on the bottom enclosure. Be sure that the flat ribbon cable from the keyboard is correctly positioned to connect it to the Keyboard Scanner Board. Note: If you have disconnected the Bass and Treble ends of the flat ribbon cable during service, be sure that you have reconnected them and secured them with tape.

  • Page 80: Natural/White Key

    K2600/K2600X Disassembly/Assembly K2600X Keyboard Assembly Natural/White Key Pivot location Key spring location Strikes the front and rear key Hooks under the front of the keyboard chassis contact on key depression Mounts through the keyboard chassis Figure 4-14 Natural/white key, 88-note keyboard Pivot location Key spring...

  • Page 81: Sharp/Black Keys

    K2600/K2600X Disassembly/Assembly K2600X Keyboard Assembly Insert the screwdriver here Insert a 3mm dia. dowel into the spring and push down slightly. Then move the top of the dowel toward the front of the keyboard to remove the spring from the hook. Pivot Keyboard chassis section...

  • Page 82: Replacing A Key

    K2600/K2600X Disassembly/Assembly K2600X Keyboard Assembly Replacing a Key 1. The following instructions apply to both natural and sharp keys. Note: Always replace a sharp key before replacing the adjacent natural keys. 2. Hook the front end of the key under the keyboard chassis. 3.

  • Page 83: Removing The Keyboard Contact Strips

    K2600/K2600X Disassembly/Assembly K2600X Keyboard Assembly Removing the Keyboard Contact Strips 1. Place the keyboard upside down on a flat soft surface. Be sure that the keys are resting on a soft surface to avoid scratching or other damage. 2. Follow the procedure for removing the Bass and Treble Keyboard Contact Boards. 3.

  • Page 84: Removing A Key Weight

    K2600/K2600X Disassembly/Assembly K2600X Keyboard Assembly Removing a Key Weight 1. The main components of the weighted-key action consist of the following: the 88 keys, two rods, 88 key weights, and support brackets for the key weights and rods. There are seven 12-position brackets and one 4-position bracket.
  • Page 85 K2600/K2600X Disassembly/Assembly K2600X Keyboard Assembly 3. Place the rod and key weights into position over the support brackets and snap the rod into the support brackets. Be certain that the rod is pressed securely into the support brackets. 4. Prior to replacing the keys, check that each key weight moves freely. To do this, position a screwdriver at the back end of the key weight (on the red felt), press down and remove the screwdriver.
  • Page 86 K2600/K2600X Disassembly/Assembly K2600X Keyboard Assembly 4-36...

  • Page 87: Chapter 5 Troubleshooting

    Chapter 5 Troubleshooting Introduction Before opening the unit, verify the customer’s complaint. If possible, save any customer data stored in RAM. Perform a Hard Reset to return the unit to factory defaults thereby eliminating any chance of operator error. Reinstall the operating system and objects files. Always check for recently installed options and verify the installation.

  • Page 88: Saving User Data

    Troubleshooting Using the Disk Drive 4. The LCD displays a warning that continuing will erase everything, press the Yes soft button to continue. The LCD displays a second warning. Press the Yes soft button to continue. 5. After the disk is formatted and verified, the LCD displays the message: Format Press the Yes soft button and repeat the process or press the another floppy disk?

  • Page 89: Boot Loader

    Troubleshooting Boot Loader Boot Loader Use the K2600’s Boot Loader to enter Diagnostics or perform a Hard Reset to the unit. You can also install operating system updates and ROM objects into flash ROM. Entering the Boot Loader Apply power to the unit. When the message appears in the LCD, quickly Please wait...

  • Page 90: Soft Reset

    Troubleshooting Boot Loader Soft Reset The Soft Reset does not erase user RAM and is equivalent to turning the power off and on. To perform a Soft Reset, simultaneously press the +/-, 0 and Clr buttons. Installing the Operating System 1.

  • Page 91: Replacing The Battery

    Troubleshooting Replacing the Battery Replacing the Battery The K2600 uses a flat three volt Lithium coincell battery. When the battery voltage runs low, the K2600 boots up with a low battery message. The LEDs flashing three times on power up is also an indicator that the battery is low.

  • Page 92: Scanner Diagnostics

    Troubleshooting Scanner Diagnostics Scanner Diagnostics The Scanner Diagnostics include separate tests to verify the operation of the front panel buttons, LEDs, and the Alpha Wheel. For the K2600 keyboard models, the Scanner Diagnostics also include tests for the keyboard, sliders, wheels, ribbons, and pedals. Note: The Volume potentiometer is not tested using the Scanner Diagnostics.

  • Page 93: K2600 Keyboard Models

    Troubleshooting Scanner Diagnostics K2600 Keyboard Models To enter the Scanner Tests, first turn on the K2600. Once the unit is on and in program mode, simultaneously hold down the 4, 5, and 6 buttons located in the Data Entry section. All front panel LEDs will light in a sequence, then simultaneously, and the LCD will display the following: K2500 SCANNER DIAGNOSTICS...

  • Page 94: Small Ribbon

    Troubleshooting Scanner Diagnostics Small Ribbon To test the small ribbon, move your finger up and down the ribbon. This test includes the position and pressure of the small ribbon. An example of the expected test result follows: At center, full pressure: SHORT POS. = 128 PRESS.

  • Page 95: Power Up Problems

    Troubleshooting Power Up Problems Power Up Problems Dead, No Power 1. Before opening the unit, verify the following: • The AC cord is good and properly connected to the unit. • The AC outlet is supplying power. • Check the fuse located in the AC entry module. If the fuse is blown, replace it. (Refer to Chapter 6, Parts Lists to verify the correct value of the fuse for the unit you are servicing.

  • Page 96: Locks Up, Freezes

    Troubleshooting Power Up Problems Locks Up, Freezes ‘Running System…’ or Fails VLSI/ZRAM test in diagnostics: 1. On the DSP Board, check the signal paths and supplies for the components at the following locations: • Check Y1 crystal and verify that this signal is reaching the appropriate ICs. •...

  • Page 97: Front Panel Problems

    Troubleshooting Front Panel Problems Front Panel Problems Boots up with three Flashes 1. This indicates that the battery is low. Refer to Replacing the Battery on page 5-5. 2. Verify that U1 in the scanner circuitry is v5.04. Note: If you are servicing a K2600R rack unit, U1 (M37451) is located on the Front Panel/Scanner Board.

  • Page 98: Audio Problems

    Troubleshooting Audio Problems Audio Problems Note: If you are diagnosing a K2600R rack unit, you can check for audio without having a controller connected. Connect a pair of headphones, turn the power on, and press the Cancel button. While pressing the Cancel button, press a few of the alphanumeric buttons.

  • Page 99: Keyboard Problems

    Troubleshooting Keyboard Problems Keyboard Problems Keyboard velocity problems 1. Perform a Hard Reset to eliminate programming problems. 2. Refer to the Scanner Board schematics. 3. On the Scanner Board, check J703 for the proper jumper setting. 4. Check the signals at U5 and U6 on Scanner Board. Dead Keyboard 1.

  • Page 100: K2600/K2600X Interconnect Diagram

    Troubleshooting K2600/K2600X Interconnect Diagram K2600/K2600X Interconnect Diagram *Located on back side of the board. J807 Floppy Pwr *J818 J901 J805 Floppy DSP to Dig I/O J801 Sampler J813 Scanner CPU BOARD DSP BOARD J804 J812 J808 J903 J814 CPU to CPU to DC Power J701...

  • Page 101: K2600R Interconnect Diagram

    Troubleshooting K2600R Interconnect Diagram K2600R Interconnect Diagram The K2600R Interconnect Diagram includes the connections to the Hard Drive, Sampling and Small Digital I/O Boards. J1101 CPU Host J1103 Audio SAMPLER J1108 J1102 SMP Dig I/O PHONES/ VOLUME J1201 J1205 SM DIG I/O *Located on back side of the board.
  • Page 102 Troubleshooting K2600R Interconnect Diagram 5-16...

  • Page 103: Parts Lists

    Parts Lists Introduction The parts lists included in this chapter cover all models of the K2600 Series. Some printed circuit boards and assemblies are used in more than one model. Therefore, the parts lists on the following pages are listed under these headings:...

  • Page 104: K2600, K2600S, K2600X, K2600Xs, K2600 Aes

    Parts Lists Introduction K2600, K2600S, K2600X, K2600XS, K2600 AES Part No. Description Page N012000133 Final Assembly (K2600X/K2600XS/K2600 AES) page 6-24 N012002131 Final Assembly (K2600/K2600S) page 6-21 N012103794 LCD Board (K2600/K2600S) page 6-21 N012103798 LCD Board (K2600X/K2600XS/K2600 AES) page 6-24 N012104111 AC Entry Module Assembly page 6-17 N012104311...

  • Page 105: K2600 Series

    Parts Lists K2600 Series K2600 Series CPU Board, N012305411 Part No. Description Qty. Reference Designation N013041101 CABLE SAMPLE RAM POWER JUMPER K2600 @J819 PIN 2 & 3 N033120600 PCB FAB CPU BOARD (REV. D) K2600 PCB1 N035040105 BATTERY COINCELL 3V 195mah CR2032...
  • Page 106 Parts Lists K2600 Series Part No. Description Qty. Reference Designation N051101748 RES TF 6.2KΩ 5% 1/8W 1206 R161 N051101780 RES CF 100KΩ 5% 1/8W 1206 R152 N051101785 RES CF 330KΩ 5% 1/8W 1206 N051101790 RES CF 1.0MΩ 5% 1/8W 1206 N051101799 RES CF 20MΩ...

  • Page 107: Dsp Board, N012305413

    Parts Lists K2600 Series Part No. Description Qty. Reference Designation N083015701 IC MASKROM K2501 BASE ROM 64M 830157-001 N083015801 IC MASKROM K2600 PIANO 32M 830158-001 N261000244 IC DIG 74LCX244 OC BUS XCEIVER 3-ST N261008245 IC DIG 74LCX245 OC BUS XCEIVER 3-ST...

  • Page 108: K2600R/K2600Rs

    Parts Lists K2600R/K2600RS K2600R/K2600RS Audio Board, N012305605 Part No. Description Qty. Reference Designation N032055802 BRACKET SUPPORT AUDIO PCB K2600R N041025305 HEADER .156" SP 5P (09-65-2058) J602 N041031216 HEADER .1" SP DUAL ROW 16P (057-016-153) J601 N041034003 HEADER .098" SP 3P (22-03-5035) J615 N041034005 HEADER .098"...

  • Page 109: Backlight Board, N012104325

    Parts Lists K2600R/K2600RS Part No. Description Qty. Reference Designation N052080027 CAP CER NPO 270PF 50V 2% 0805 C37-40, 97-100 N052080039 CAP CER NPO 1000PF 50V 2% 0805 C61-64, 121-124 N052080047 CAP CER NPO 2200PF 50V 1% 0805 C29-32, 41-44, 53-56, 65-68, 89-92, 101-104, 113-116, 125-128 N052080056 CAP CER NPO 47PF 50V 2% 0805 C49-52, 109-112...

  • Page 110: Phone & Volume Assembly, N012401127

    Parts Lists K2600R/K2600RS Phone & Volume Assembly, N012401127 Part No. Description Qty. Reference Designation N013040301 CABLE ASSY VOLUME TO AUDIO 380MM K2600R N041034501 PHONE JACK STEREO 1/4" RA49C-14B N051101605 POT ROTARY VOLUME 10K CPSG-1604 N052005300 CAP CER MONO 470PF 200V 5% NPO AX N055002201 CHOKE COIL TRIPLE TORROID DLF3000 AC Entry Module Assembly, N012104121...
  • Page 111 Parts Lists K2600R/K2600RS Part No. Description Qty. Reference Designation N051100113 RES CF 100Ω 5% 1/8W R17, 28 N051100115 RES CF 150Ω 5% 1/8W N051100117 RES CF 200Ω 5% 1/8W R33, 37 N051100120 RES CF 330Ω 5% 1/8W N051100123 RES CF 510Ω 5% 1/8W N051100132 RES CF 1KΩ...

  • Page 112: Front Panel/Scanner Board, N012305417

    Parts Lists K2600R/K2600RS Front Panel/Scanner Board, N012305417 Part No. Description Qty. Reference Designation N035021121 KEYTOP BLACK N038000316 KEYTOP (+/-) K2600R N038000341 KEYTOP (1) BLACK K2600R N038000342 KEYTOP (2) BLACK K2600R N038000343 KEYTOP (3) BLACK K2600R N038000344 KEYTOP (4) BLACK K2600R N038000345 KEYTOP (5) BLACK K2600R N038000346...

  • Page 113: Final Assembly, N012000134

    Parts Lists K2600R/K2600RS Part No. Description Qty. Reference Designation N052901610 CAP ELECT GP 10UF 16V 20% SZB SMT N053000802 DIODE SWITCH 1N4148 SMT DL-35 N054000802 TRANS MMBT2222L SOT-23 Q1, 3 N054002906 TRANS MMBT2907L SOT-23 Q2, 4 N061000302 IC LOGIC 74LS145 SOP16 N061020203 IC 74HC74A DUAL D-FLOP SOIC14 N235023601...
  • Page 114 Parts Lists K2600R/K2600RS Part No. Description Qty. Reference Designation N027211140 SPLIT LOCK WASHER 3.1X5.7X0.7BLK N027213160 SPLIT LOCK WASHER 4.2X7.3X1 AN N027415140 STAR WASHER M4 N032027454 FRONT PANEL K2600R N032028142 BOTTOM K2600R N032028232 TOP K2600R N032028334 KNOB P/N BPLG-10T N032028741 N032035211 FRONT PANEL PCB MOUNTING BRACKET N032035411 POWER INVERTOR PCB SHIELD...

  • Page 115: K2600 Series Keyboard Models

    Parts Lists K2600 Series Keyboard Models K2600 Series Keyboard Models Audio Board, N012305611 Part No. Description Qty. Reference Designation N032055801 BRACKET SUPPORT AUDIO PCB ASSY K2600X BRACKET N041025305 HEADER .156" SP 5P (09-65-2058 J602 N041031216 HEADER .1" SP DUAL ROW 16P (057-016-153)

  • Page 116: Button Board, N012304344

    Parts Lists K2600 Series Keyboard Models Part No. Description Qty. Reference Designation N052007503 CAP CER X7R 0.1UF 50V 10% 1206 C1, 3, 7-10, 14, 15, 27, 28, 69, 71, 73, 74, 78, 79, 130-187, 189 N052080012 CAP CER NPO 68PF 50V 2% 0805...

  • Page 117: Floppy Disk Drive Assembly, N012104666

    Parts Lists K2600 Series Keyboard Models Part No. Description Qty. Reference Designation N035028011 LCD LOCATING SUPPORT BEZEL K2500 N042005401 JUMPER WIRE 13MMX4MM N043010201 SWITCH TACK 6mmX3.5mm 160GF ALPS SKHLAC S1, 2, 4-10, 12-16, 19-24, 26-32, 35-48 N044010501 ENCODER 36STEP 2BIT...

  • Page 118: Super Ribbon Assembly, N044011513

    Parts Lists K2600 Series Keyboard Models Super Ribbon Assembly, N044011513 Part No. Description Qty. Reference Designation N041021551 CONNECTOR FFC/FPC GVERSION (15-38-8050) N044011511 SUPER RIBBON CONTROLLER K2500 Pitch & Mod Wheel Assembly, N012304338 Part No. Description Qty. Reference Designation N013025904 CABLE PITCH & MOD WHEEL K2500/X...

  • Page 119: Ac Entry Module, N012104111

    Parts Lists K2600 Series Keyboard Models Part No. Description Qty. Reference Designation N051101411 POT 50K 3/4 TURN TOP/BOT EVN-D8AA03B54 R13, 15, 17 N051101412 POT 100K 3/4 TURN TOP/BOT EVN-P8AA03B15 R21, 25 N052001204 CAP CER MONO Z5U .1UF 50V 20% .3AX...
  • Page 120 Parts Lists K2600 Series Keyboard Models Part No. Description Qty. Reference Designation N041034005 HEADER .098" SP 5P (22-03-5055) J108 N049010102 INSULATION PAD 15X20MM W/O HOLE @VR5, VR1, VR2 N049010110 INSULATION PAD (MICA PAD) @D3, Q2, Q3, VR6 N051100103 RES CF 10Ω 5% 1/8W...

  • Page 121: Keyboard Scanner Board, N012305415

    Parts Lists K2600 Series Keyboard Models Keyboard Scanner Board, N012305415 Part No. Description Qty. Reference Designation N041010302 JUMPER .1" SP 2POS JUMPER @J703 PINS 1& 2 N041021128 IC SOCKET .6W 28P N041030003 HEADER .1" SP 3P (22-03-2031) J703 N041030511 HEADER .098" SP 7P (22-03-5075)

  • Page 122: Slider Board, N012104345

    Parts Lists K2600 Series Keyboard Models Part No. Description Qty. Reference Designation N061013851 IC LOGIC 74HC164 SOP14 U5, 6 N061013902 IC LOGIC 74HC273A SOP20 N061014003 IC LOGIC MC74HC541DW SOP-20 N062005704 IC GAL 16V8A-15QJ SMT PLCC20 N062100101 IC SRAM 32KX8 70nS SOP28 GM76C256A70...

  • Page 123: K2600/K2600S

    Parts Lists K2600/K2600S K2600/K2600S LCD Board, N012103794 Part No. Description Qty. Reference Designation N013040200 CABLE ASSY LCD DATA 350M/M K2600 N245010315 LCD DISPLAY 240X64 TIANMA (TM24064KFG) Final Assembly, N012002131 Part No. Description Qty. Reference Designation N013027304 CABLE SUPER RIBBON EXTENSION K2600X N013027703 CABLE FLOPPY POWER 635MM K2600/X N013030951...
  • Page 124 Parts Lists K2600/K2600S Part No. Description Qty. Reference Designation N025323308 MACHINE SCREW BH M3X8 BLK N025323310 MACHINE SCREW BH M3X10 BLK N025323408 MACHINE SCREW BH M4X8 BLK N025328310 MACHINE SCREW BH 3X10 BLK W/WASHER N025328328 MACHINE SCREW BH 3X28 W/SF WASHER N025693322 SCSI BOLT (WHITE) N025723510...

  • Page 125: Keyboard Assembly, N215040311

    Parts Lists K2600/K2600S Keyboard Assembly, N215040311 Part No. Description Qty. Reference Designation PCB KEY CONTACT LOW PCB KEY CONTACT HIGH KEY CONTACT STRIP (12 NOTE) BRACKET ROD/KEY WEIGHT SUPPORT 12 PO KEY PIVOT BRACKET ROD/KEY WEIGHT SUPPORT 4 POS KEY NATURAL A KEY NATURAL B KEY NATURAL C KEY NATURAL D...

  • Page 126: K2600X/K2600Xs/K2600 Aes

    Parts Lists K2600X/K2600XS/K2600 AES K2600X/K2600XS/K2600 AES LCD Board, N012103798 Part No. Description Qty. Reference Designation N013040200 CABLE ASSY LCD DATA 350M/M K2600 N245010315 LCD DISPLAY 240X64 TIANMA (TM24064KFG) Final Assembly, N012000133 Part No. Description Qty. Reference Designation N013027304 CABLE SUPER RIBBON EXTENSION 860MM N013027703 CABLE FLOPPY POWER 635MM N013030951...
  • Page 127 Parts Lists K2600X/K2600XS/K2600 AES Part No. Description Qty. Reference Designation N025323408 MACHINE SCREW BH M4X8 BLK N025328310 MACHINE SCREW BH 3X10 BLK W/WASHER N025328328 MACHINE SCREW BH 3X28 W/SF WASHER N025328610 MACHINE SCREW BH 4X10 W/SF WASHER BLK N025693322 SCSI BOLT (WHITE) N025723510 TAPPING SCREW-2 BH 3.5X10 BLK W/SF N027112100...

  • Page 128: Keyboard Assembly, N215040413

    Parts Lists K2600X/K2600XS/K2600 AES Keyboard Assembly, N215040413 Part No. Description Qty. Reference Designation PCB KEY CONTACT LOW PCB KEY CONTACT HIGH KEY CONTACT STRIP (12 NOTE) BRACKET ROD/KEY WEIGHT SUPPORT 12 PO KEY PIVOT BRACKET ROD/KEY WEIGHT SUPPORT 4 POS KEY NATURAL A KEY NATURAL B KEY NATURAL C...
  • Page 129 Chapter 7 Schematics Description Page No. CPU Board–CPU, Sampler Interface (1 of 8) page 7-3 CPU Board–Flash, SRAM, Expansion PRAM (2 of 8) page 7-4 CPU Board–FDD, LCD, MIDI Interface (3 of 8) page 7-5 CPU Board–SCSI Interface (4 of 8) page 7-6 CPU Board–JANIS, DAC Interface (5 of 8) page 7-7...

  • Page 131: Cpu Board-Cpu, Sampler Interface (1 Of 8)

    Chapter 7\ CPU Board–CPU, Sampler Interface (1 of 8) Kurzweil K2600 Series Service Manual CD[15:00] {8-A1} CA[25:00] {8-A1} SCSIEOP {4-B1} EXTIAK {8-D1} SCSIDRQ {4-A8} IACK7 RESET {3-B1,8-B1,D8} J801 IACK6 IACK5 /A29/PA5 DREQS IACK4 /A28/PA4 /A30/PA6 SD[15] SMPDREQ2 .1uF .1uF .1uF .1uF...

  • Page 132: Cpu Board-Flash, Sram, Expansion Pram (2 Of 8)

    Kurzweil K2600 Series Service Manual CPU Board–Flash, SRAM, Expansion PRAM (2 of 8) BA[21:00] {3-A1,4-B1,5-D1,8-C8} BD[15:00] {3-A1,5-D1,6-C8,8-A8} +VBAT +VBAT .1uF .1uF 1M/2MX16 FLASH ROM +VBAT BA[21] NC/A21 BA[20] .1uF .1uF BA[19] BA[18] BA[17] +VBAT MMBT2222 BA[16] BD[15] A17/CE BA[15] BD[14]...

  • Page 133: Cpu Board-Fdd, Lcd, Midi Interface (3 Of 8)

    CPU Board–FDD, LCD, MIDI Interface (3 of 8) Kurzweil K2600 Series Service Manual FDCIRQ {1-C8} 74HC04 BD[15:00] {2-A1,5-D1,6-C8,8-A8} BA[21:00] {2-A1,4-B1,5-D1,8-C8} VCC VCC VCC VCC 82C765 J820 FDD CTL DEV. BD[15] CLK16 2.2K 2.2K D[7] BD[14] 16 MHz BD[15] D[6] D[7]...

  • Page 134: Cpu Board-Scsi Interface (4 Of 8)

    Kurzweil K2600 Series Service Manual CPU Board–SCSI Interface (4 of 8) .1uF .1uF .1uF .1uF SCSIDRQ SCSIDRQ {1-A1,D2} 74HC04 SCSIIRQ SCSIIRQ {1-C8} 74HC04 J818 53C80 BD[15:08] BD[15] D[7] SBD[7] DB[7] BD[14] D[6] SBD[6] DB[6] BD[13] D[5] SBD[5] DB[5] GND[1] BD[12]...

  • Page 135: Cpu Board-Janis, Dac Interface (5 Of 8)

    CPU Board–JANIS, DAC Interface (5 of 8) Kurzweil K2600 Series Service Manual BJKISO2 {8-C3} TDO_DEV2 {6-C1} BJKISO1 {8-C3} BJKISO0 {8-C3} TCLK {1-D1,6-B1} BJTOPO {8-C3} J821 PJKISO2 {8-B3} PJKISO1 {8-B3} TCLK TDO_DEV3 PJKISO0 {8-C3} TDI_DEV1 {1-C1} PJTOPO {8-B3} JTAG TAP BH1CTOPO {8-C3}...

  • Page 136: Cpu Board-Sound Memory Interface (6 Of 8)

    Kurzweil K2600 Series Service Manual CPU Board–Sound Memory Interface (6 of 8) SCSI_DISCON {4-C1} B_ROMCS {7-C1} P_ROMCS {7-C1} ROMOE {7-C1} .1uF 74VHC574 .1uF ROMA[21:00] {7-C1} NC7SZ04 D[1] Q[1] VLSICLK2 D[2] Q[2] VLSICLK {5-D1,7-D1,8-C8} SMA[21] ROMA[21] D[3] Q[3] SMA[20] ROMA[20] D[4]...

  • Page 137: Cpu Board-Sound Memory (7 Of 8)

    CPU Board–Sound Memory (7 of 8) Kurzweil K2600 Series Service Manual RAMRAS1 VTERM RAMRAS1 {6-C8} RAMRAS2 R137 RAMRAS2 {6-C8} RAMCAS0 R128 RAMCAS0 {6-C8} RAMCAS1 R138 .1uF RAMCAS1 {6-C8} RAMCAS2 R129 RAMCAS2 {6-C8} RAMCAS3 R139 RAMCAS3 {6-C8} RAMWE R130 RAMWE {6-C8}...

  • Page 138: Cpu Board-Connectors And Decoders (8 Of 8)

    Kurzweil K2600 Series Service Manual CPU Board–Connectors and Decoders (8 of 8) BD[15:00] {2-A1,3-A1,5-D1,6-C8} SD[15:00] {1-A1} SMPCS ONE_WS {1-C8} CA[25:00] {1-A1} CD[15:00] {1-A1} K2600GL1.2 22V10isp-15 8_BIT 8_BIT {1-C8} 8_BIT_CS3 JANISCS PJANISCS JANISCS {1-D3} JANISCS ONE_WS BJANISCS ONE_WS_CS1 BJANISCS {5-A1} 74VHC245...

  • Page 139: Dsp Board-Vast Chain (1 Of 5)

    DSP Board–Vast Chain (1 of 5) Kurzweil K2600 Series Service Manual DSACK1 (2-A1, 5-A1} WRITE {2-A1, 5-A1} RESET {2-A1, 5-C8} PHOBBES2CS {5-A8} PHOBBES1CS {5-A8} VLSICLK {5-B8} .1uF VLSICLK1 NC7SZ04 BA[25:00] {2-D1,5-B8} HOBBES HOBBES PH1TOPO PJTOPO {5-C1} TOPI TOPO TOPI TOPO...

  • Page 140: Dsp Board-Fx Lisas, Dither (2 Of 5)

    Kurzweil K2600 Series Service Manual DSP Board–FX LISAs, DITHER (2 of 5) DLY1D[23:00] {3-B1} DLY1A[09:00] {3-D1} DLY2D[23:00] {3-B1} DLY2A[09:00] {3-D1} LISA L1RAS {3-C5,C6} KISO L1CAS {3-B1,C5,C6} L1W {3-B1,C5,C6} BH2TOPO {1-C8, 5-D1} SMRAS L2RAS {3-C5,C6} DKISO {1-C8} KISI0 L2KISO SMCAS L2CAS {3-C5,C6,D1}...

  • Page 141: Dsp Board-Dram 3/5V Addr/Data Buffers (3 Of 5)

    DSP Board–DRAM 3/5V Addr/Data Buffers (3 of 5) Kurzweil K2600 Series Service Manual BDLY1D[23:00] {4-A8} 74LCX2245 DLY1D[23] BDLY1D[23] DLY1D[23] BDLY1D[23] B[1] A[1] BDLY2D[23:00] {4-B8} DLY1D[22] BDLY1D[22] DLY1D[22] BDLY1D[22] B[2] A[2] DLY1D[21] BDLY1D[21] DLY1D[21] BDLY1D[21] B[3] A[3] DLY1D[20] BDLY1D[20] DLY1D[20] BDLY1D[20]...

  • Page 142: Dsp Board-Fx Delay Ram (4 Of 5)

    Kurzweil K2600 Series Service Manual DSP Board–FX Delay RAM (4 of 5) BDLY1D[23:00] {3-A8} BL1RAS {3-C5,C7} BL1CAS {3-C5,C7} BL1W {3-C5,C7} 1M/4Mx16 DRAM 1M/4Mx16 DRAM RAS1M RAS1M RAS4M RAS4M 1Mx16 DRAM 1Mx16 DRAM UCAS1M BDLY1D[15] UCAS1M BDLY1D[15] UCAS4M BDLY1D[14] UCAS4M R115...

  • Page 143: Dsp Board-System Init, Dig Io Int, Decode, Clock (5 Of 5)

    DSP Board–System Init, Dig IO Int, Decode, Clock (5 of 5) Kurzweil K2600 Series Service Manual CA[25:00] 74VHC138 CA[20] CA[21] DSPCS C126 CA[22] DITHER18CS {2-D1} .1uF DITHER16CS {2-D1} 74VHC245 EFX2CS {2-C1} CA[23] CA[24] BA[24] EFX1CS {2-A1} B[1] A[1] DSPCS K2600 CPU-TO-DSP...

  • Page 144: Power Supply Board

    Kurzweil K2600 Series Service Manual Power Supply Board J104 BACKLIGHT SUPPLY LM7805 KBU04 UNREG BLV+ HDGND 499 1% 100uF 16V 4700uF / 25V PN2222 J102 J103 357 1% FAN SUPPLY 0.1uF 16VAC FANV+ HDGND HDD SECONDARY LM7805 1N4002 LM7815 220uF 16V 2200uF / 35V 0.1uF...

  • Page 145: Backlight Inverter Board

    Backlight Inverter Board Kurzweil K2600 Series Service Manual K2500R BACKLIGHT POWER SUPPLY 16VDC UNREG CCFT-INV INPUT LM7805CTB BKLITE OUT2 HI-VOLT OUT1 SENSE-IN SENSE-OUT 2PIN,1ROW.,098SP 100uF 4PIN,1ROW,.200SP 100uF PN2222 100uF YOUNG CHANG CO., LTD. Young Chang R&D Inst. - Waltham, MA, USA Duplication without the express written consent of Young Chang Co., Ltd.

  • Page 146: Audio Board (Rack Models)-A Dacs, B Dacs, Filters (1 Of 4)

    Kurzweil K2600 Series Service Manual Audio Board (rack models)–A DACs, B DACs, Filters (1 of 4) PWRSENSE {4-A2} DCLKD {2-A1} DCLKB {2-A1} UNMUTE {4-A2} DACDB {2-A1} DACDA {2-A1} DACLE {2-A1} J601 K2501 DAC Connector DGND 2 4 6 8 10 12 14 16 6.04K...

  • Page 147: Audio Board (Rack Models)-C Dacs, D Dacs, Filters (2 Of 4)

    Audio Board (rack models)–C DACs, D DACs, Filters (2 of 4) Kurzweil K2600 Series Service Manual C101 C113 C125 LVOUT 6.04K 2200PF 1% 2200PF 1% 2200PF 1% LTRIM CLEFT {3-C4,4-B1} 220pF DCLKB {1-A8} LADJ LIOUT DACLE {1-A8} C194 R105 R117...

  • Page 148: Audio Board (Rack Models)-A, B, C, D Balanced Outs (3 Of 4)

    Kurzweil K2600 Series Service Manual Audio Board (rack models)–A, B, C, D Balanced Outs (3 of 4) 3.57K 3.57K 3.57K R143 R164 R183 5532A 5532A 5532A A RIGHT B LEFT A LEFT DPDT DPDT DPDT R152 R173 R189 200 0.1% 200 0.1%...

  • Page 149: Audio Board (Rack Models)-Mix Output, Phones Output (4 Of 4)

    Audio Board (rack models)–Mix Output, Phones Output (4 of 4) Kurzweil K2600 Series Service Manual R210 4.7K KSA931 C130 C134 C138 C142 C146 C150 C154 C158 C162 C166 C170 C174 C178 C182 C186 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF...

  • Page 150: Front Panel/Scanner Board (Rack Models)-Scanner, Front Panel I/F

    Kurzweil K2600 Series Service Manual Front Panel/Scanner Board (rack models)–Scanner, Front Panel I/F P[7:0] PHASEA DAC2 COMMON DAC1 PHASEB MIDI MMBT2222 DISK SONG MASTER MIDI EFFECTS Q ACCS SETUP PROGRAM 37451 P[37] P[36] RESETOUT SMIDI_TxD TxD/ P[35] SMIDI_RxD AIN[7] RxD/...

  • Page 151: Audio Board (Keyboard Models)-A Dacs, B Dacs, Filters (1 Of 4)

    Audio Board (keyboard models)–A DACs, B DACs, Filters (1 of 4) Kurzweil K2600 Series Service Manual PWRSENSE {4-A2} DCLKD {2-A1} DCLKB {2-A1} UNMUTE {4-B2} DACDB {2-A1} DACDA {2-A1} DACLE {2-A1} J601 K2501 DAC Connector DGND 2 4 6 8 10 12 14 16 6.04K...

  • Page 152: Audio Board (Keyboard Models)-C Dacs, D Dacs, Filters (2 Of 4)

    Kurzweil K2600 Series Service Manual Audio Board (keyboard models)–C DACs, D DACs, Filters (2 of 4) C101 C113 C125 LVOUT 6.04K 2200PF 1% 2200PF 1% 2200PF 1% LTRIM CLEFT {3-C4,4-B1} 220pF DCLKB {1-A8} LADJ LIOUT DACLE {1-A8} R105 R117 R125...

  • Page 153: Audio Board (Keyboard Models)-A, B, C, D Balanced Outs (3 Of 4)

    Audio Board (keyboard models)–A, B, C, D Balanced Outs (3 of 4) Kurzweil K2600 Series Service Manual 3.57K 3.57K 3.57K R143 R164 R183 5532A 5532A 5532A A RIGHT B LEFT A LEFT DPDT DPDT DPDT R152 R173 R189 200 1%...

  • Page 154: Audio Board (Keyboard Models)-Mix Output, Phones Output (4 Of 4)

    Kurzweil K2600 Series Service Manual Audio Board (keyboard models)–Mix Output, Phones Output (4 of 4) R210 4.7K KSA931 C130 C134 C138 C142 C146 C150 C154 C158 C162 C166 C170 C174 C178 C182 C186 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF...

  • Page 155: Front Panel Board (Keyboard Models)-Buttons And Leds

    Front Panel Board (keyboard models)–Buttons and LEDs Kurzweil K2600 Series Service Manual 2SA1271 2SA1271 2SA1271 2SA1271 2SA1271 2SA1271 PHASEA COMMON PHASEB AUX 1 AUX 2 AUX 3 SLIDER 1 2N2222 RECORD PLAY/PAUSE 74HC138 SW ROTARY COL0 COL1 DUAL COLOR DUAL COLOR...

  • Page 156: Slider Board (Keyboard Models)

    Kurzweil K2600 Series Service Manual Slider Board (keyboard models) SLIDER 1 SLIDER 2 SLIDER 3 SLIDER 4 SLIDER 5 SLIDER 6 SLIDER 7 SLIDER 8 VOLUME J301 0.1UF 6PIN RA .098SP VOLUME AGnd TOP-L SLDR-L GND1 GND2 SLDR-R AGnd AGnd...

  • Page 157: Scanner Board (Keyboard Models)-Scanner Kybd I/F, Play I/F (1 Of 2)

    Scanner Board (keyboard models)–Scanner Kybd I/F, Play I/F (1 of 2) Kurzweil K2600 Series Service Manual BATSENSE {2-D7} AUXO[7:0] AUXO[7:0] CPDL1SNS {2-A8} CPDL2SNS {2-A8} BRTHSNS {2-A8} SMIDI_TxD {2-C1} J701 SMIDI_RxD {2-D7} KBDPRESS .1uF PITCH SA[15] 0 ohm SA[13] 0 ohm...

  • Page 158: Scanner Board (Keyboard Models)-Power, Dig I/O (2 Of 2)

    Kurzweil K2600 Series Service Manual Scanner Board (keyboard models)–Power, Dig I/O (2 of 2) +5Vref {1-A1,B1} MMBT2907 CPDL1SNS {1-A1} 4.7K 1N4148 CPDL1 {1-B1} CPDL2SNS {1-A1} CPDL2 {1-B1} 4148 .1uF 4148 BRTHSNS {1-A1} Control Pedal 1 4148 4148 1000pF,X7R J706 Switch Pedal 4...

  • Page 159: Player Control Board (Keyboard Models)-Player Control Interface

    Player Control Board (keyboard models)–Player Control Interface Kurzweil K2600 Series Service Manual +5Vana 240K J402 +5Vana 6PIN1ROW.098SP +5Vana WHEELS 100K 240K 100K PCHHI PITCH CENTER PCHWIP CENTER TLC2272 PCHLO 240K TLC2272 MODHI 390K MODWIP 390K AGnd 240K MODLO 91ohm .1uF...

  • Page 160: Itty Bitty Button Board (Keyboard Models)

    Kurzweil K2600 Series Service Manual Itty Bitty Button Board (keyboard models) IBB1 IBB2 K2048K IBBB BRIDGE IBB1 IBB2 COL2 COL1 SWROW LEDROW J1301 5PIN,.098"SP YOUNG CHANG CO., LTD. Young Chang R&D Inst. - Waltham, MA, USA Duplication without the express written consent of Young Chang Co., Ltd.

  • Page 161: Digital I/O Board-Relays, Aes Encoding, Kds Encoding (1 Of 3)

    Digital I/O Board–Relays, AES Encoding, KDS Encoding (1 of 3) Kurzweil K2600 Series Service Manual KDSERRFLAG {3-H5} KDSERRCNT0 {3-H5} KDSERRCNT1 {3-H5} KDSINLOCK {3-H5} VLSICLK {3-A5} CLK {3-H2} TDO {3-H2} TMS {3-H2} 0.1uF,50V,Z5U 0.1uF,50V,Z5U 0.1uF,50V,Z5U TDI {3-H3} 0.1uF,50V,Z5U 110,5%,1/16W I_DACDATALO I_DACDATAHI...

  • Page 162: Digital I/O Board-Kds & Aes In/Out Connectors (2 Of 3)

    Kurzweil K2600 Series Service Manual Digital I/O Board–KDS & AES In/Out connectors (2 of 3) J1004 15-pin "Mini D" QUAD DIF'L CHOKE KDS_DATA_HI {3-B3} KDS_DATA_LO {3-B3} KDS_SYNC_HI {3-B4} KDS_SYNC_LO {3-B4} LABEL? KDS_CLK_HI {3-B4} KDS_CLK_LO {3-B4} 68pF,50V,NPO 68pF,50V,NPO 68pF,50V,NPO 68pF,50V,NPO 68pF,50V,NPO...

  • Page 163: Digital I/O Board-Kds In (3 Of 3)

    Digital I/O Board–KDS In (3 of 3) Kurzweil K2600 Series Service Manual RESET {1-H3} J1009 TCLK CLK {1-A1} TDO {1-A1} TMS {1-A1} JTAG TAP TDI {1-A1} 0.1uF,50V,Z5U 26LS32B KDS_DATA_HI {2-C1} AOUT 51,5%,1/16W KDS_DATA_LO {2-C1} KDS_SYNC_HI {2-C1} R22 110,5%,1/16W BOUT 512x9 FIFO...

  • Page 164: Rom Expansion Daughter Board-Sound Memory Control, Connectors

    Kurzweil K2600 Series Service Manual ROM Expansion Daughter Board–Sound Memory Control, Connectors ROMD[15:00] J1203 J1202 ROMA[18] ROMA[19] J1201 ROMA[17] ROMA[08] SMA[26:00] SMA[26] ROMA[07] ROMA[09] SA26 SMA[25] ROMA[06] ROMA[10] SA25 SMA[24] ROMA[05] ROMA[11] SA24 SMA[23] ROMA[04] ROMA[12] SA23 SMA[22] ROMA[03] ROMA[13]...

  • Page 165: Sampling Option Board (Smp-2)-Analog A/D (1 Of 4)

    Sampling Option Board (SMP-2)–Analog A/D (1 of 4) Kurzweil K2600 Series Service Manual 2.21K LM393 GAINA {2-K2} STAT/ERR {2-K2, 3-H2} 1N914 GAINB {2-L3} 74HC74 OVER {2-H6} AGnd 3.09K AGnd 1N914 74HC4052-A 6.98K .1uF +5ana LM393 15.4K 68pF 1N914 4.75K 34.8K...

  • Page 166: Sampling Option Board (Smp-2)-System Interface (2 Of 4)

    Kurzweil K2600 Series Service Manual Sampling Option Board (SMP-2)–System Interface (2 of 4) A_WCK {1-K5} 12CLK {3-K1} A_LRCK {1-K5} TXDATA {3-G7} DFSYNC {3-K4} TXSYNC {3-G7} A_SOUT {1-K5} MCK {1-K6} DSCK {3-K4} 11CLK {3-K1} DSDATA {3-K4} EXTCLK {3-H3} A_BCK {1-K5, 3-G5}...

  • Page 167: Sampling Option Board (Smp-2)-Digital Interface (3 Of 4)

    Sampling Option Board (SMP-2)–Digital Interface (3 of 4) Kurzweil K2600 Series Service Manual 74HCU04 11CLK {2-L1} FE Bead ZVN3306F 74HCU04 74HCU04 12CLK {2-L1} OPT/COAX {2-K2, 3-G4} FE Bead 2.21K 15pF J1106 15pF GP1F31F 74HC74 6CLK 47pF 47pF +5Vana .1uF 11.2896MHz...

  • Page 168: Sampling Option Board (Smp-2)-Analog Input (4 Of 4)

    Kurzweil K2600 Series Service Manual Sampling Option Board (SMP-2)–Analog Input (4 of 4) Keep R68 & R69 close to J1107 J1107 LIN {1-A6} 68pF A/D SOURCE {2-K4} FGnd 1.21K 100pF P1 1N914 100pF P1 MC33078 R IN {1-A3} +12V 68pF...
  • Page 169 Kurzweil K2600 Series Service Manual Transformer 3-10 Numerics Audio Board 1st NVRAM: diagnostic test 2-11 cables, keyboard models 4-7 2nd NVRAM: diagnostic test 2-11 cables, rack models 3-3 parts list, keyboards models 6-13 parts list, rack models 6-6 removing, keyboard models 4-7...
  • Page 170 Kurzweil K2600 Series Service Manual Cover Front Panel replacing, keyboard models 4-8 removing, rack models 3-12 replacing, rack models 3-4 replacing, rack models 3-12 Digital IO: diagnostic test 2-11 CPU Board Disassembly instructions, 76-note Keyboard Assembly cables, keyboard models 4-16...
  • Page 171 Kurzweil K2600 Series Service Manual replacing, rack models 3-17 saving user data 5-2 Keyboard Disk Drive Hard Dead 5-13 removing, keyboard models 4-19 Dead Note(s) 5-13 removing, rack models 3-18 noise 5-13 replacing, keyboard models 4-19 Keyboard Assembly, 76-note keyboard models...
  • Page 172 Kurzweil K2600 Series Service Manual Objects: installing 5-4 replacing, keyboard models 4-10 Operating System: installing 5-4 Small Digital I/O Board cables, keyboard models 4-8 cables, rack models 3-5 removing, keyboard models 4-8 removing, rack models 3-4 Pedals replacing keyboard models 4-9...

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