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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...
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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.
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.
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.
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. •...
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...
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...
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...
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...
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.
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.
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).
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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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.
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.
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.
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.
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.
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.
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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.
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.
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.
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.
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.
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.
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.
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K2600R Disassembly/Assembly Front Panel Assembly 3-20...
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.
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.
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.
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...
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.
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.
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...
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...
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.
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.
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.
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.
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.
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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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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...
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...
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.
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.
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.
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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.
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.
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?
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...
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.
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.
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.
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...
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.
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.
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. •...
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.
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.
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.
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...
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.
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:...
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...
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...
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.
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%...
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/...
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%...
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...
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.
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...
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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...
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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...
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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...
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