ENSONIQ ASR-88 Service Manual
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ENSONIQ ASR-88 Service Manual

Ensoniq asr electronic keyboard service manual
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ASR
Service Manual
P/N 9312001801 . B
November 1995

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Summary of Contents for ENSONIQ ASR-88

  • Page 1 Service Manual P/N 9312001801 . B November 1995...

  • Page 2: Table Of Contents

    MECHANICAL ISSUES....................6 ASR Case (Avoid Stripping Screws)..................High - retention Force Connectors (Repair Technicians Label) ........... 6 OEX-6sr Connector on ASR Keyboard and ASR-88 Caution! Important! ......7 HOW THE ASR WORKS....................7 Keyboard and Rack Similarites..................... 9 Communications Path ......................
  • Page 3 Section D - Replacing the Keypad/Display Board..............Section E - Replacing the Keyboard (ASR-10) ..............Section E - Replacing the Keyboard (ASR-88) ..............Section F - Replacing the Digital Jack Board............... Section G - Replacing the Analog Jack Board..............
  • Page 4 Figure 1 4 - ROM and disk Compatibility ................25 Figure 1 5 - ASR-10 Exploded View..................3 9 Figure 1 6 - ASR-88 Exploded View..................40 Figure 1 7 - ASR-10 Digital Board..................4 2 Figure 18 - ASR-10 Analog Board ..................4 2 Figure 1 9 - ASR-10 Center Support Bracket Assembly..

  • Page 5: Important Things To Know

    What SlMMs to Use The ASR-10 and ASR-88 mainboard has been redesigned. It changes the type of SlMMs that can be used, and the way that you install the SIMMs. The new mainboard is used starting from the following serial numbers:...

  • Page 6: What Changed

    Important Note: It is possible that your unit has a different rev board than these cutoffs suggest, due to a repair or other circumstance. Be sure to check it against the diagrams here to confirm which rev board you have. What Changed? The newer board can accept 2 chip and 8 chip 4meg SIMMs.

  • Page 7: Transporting A Unit

    Important If SIMMs are installed in a less than optimal configuration (see pp. 71-72), the display will read SIMMs IN WRONG SOCKETS after booting. If this message is displayed, you should power off and check the SIMMs configuration. SIMMs that have GAL (gate array logic) or PAL (programmable array logic) chips on them may be too thick to fit into the standard sockets that are used on the ASR.

  • Page 8: Unit Sounds Distorted

    Density (I-ID) disks that have been formatted as Double Density (DD) on a DD drive in a unit such as an EPS, EPS-16 PLUS, or a Macintosh Plus will not be recognized in machines that have an HD drive. This would include the ASR, as well as an IBM PC or clone.

  • Page 9: Fuses

    e) Press the right arrow button until the display shows DC OFFSET. The display should show: LEFT= +/-0000x RIGHT= +/-OOOOy g) If one or both of the values is 32,767 replace the analog board. h) In a properly functioning unit, the reading should not be greater than 20 counts from zero (+/- 00020).

  • Page 10: Mechanical Issues

    Keyboard: On early units, you may break the disk drive bezel when removing the disk drive from the unit. The wheel cover was modified on later units to prevent this. Keyboard: If the mounting posts for the wheel brackets break, call ENSONIQ for a new wheel cover that has the posts reinforced.

  • Page 11: Oex-6Sr Connector On Asr Keyboard And Asr-88 Caution! Important

    Important The OEX-6sr should never be plugged in or unplu,, OOed with the ASR power on, as this could damage the ASR. The 8-pin mini-DIN connector on the rear panel of the ASR should only be used to connect the OEX-6sr Output Expander to the unit.
  • Page 12 Important The block diagram also represents the modular design of the ASR-10. Each one of the main components represented in the diagram can be replaced, if necessary, without disturbing the other components in the system. Looking at the diagram you see: Data storage and retrieval device.

  • Page 13: Keyboard And Rack Similarites

    OEX-6sr Output Expander and SCSI Interface (SP-3) built-in. These two expanders are options for the Keyboard unit. Digital I/O is an option for all ASR models. The ASR-88 has 16Meg of RAM standard, and SCSI. The ASR-88 has a keyboard adapter board instead of a KPC board.

  • Page 14: Figure 7 - Communications Path

    To help you identify a faulty module, a Communication Test Board is available from ENSONIQ Customer Service*. The Communication Test Board simulates the operation of the keyboard and can be used as a “known good”...

  • Page 15: Troubleshooting

    ASR with Incorrect Digital Power Supply Voltages (flow chart) Display Self-test Chart ASR with No LEDs Lit (flow chart) ASR with All LEDs Lit, No Display (flow chart) ASR Foot Switch and Patch Select Inputs ASR-88 Keyboard ASR Service Manual...

  • Page 16: Checking The Power Supply

    Checking the Power Supply CHECKING THE POWER SUPPLY Some ASR-10 problems may be related to a faulty power supply, transformer or line filter. You should check these before troubleshooting the rest of the unit. Measure continuity across all the fuses to make sure they are not blown.

  • Page 17: Power Supply Voltage Check Points

    Checking The Power Supply POWER SUPPLY VOLTAGE CHECK POINTS Below are the voltage ranges for proper operation of each fully loaded supply and the pins to read across with the voltmeter (see Figure 9). It is normal for line voltage to vary +/- 10%. Where Used Connector Pins Allowable range Units Designation...

  • Page 18: Testing The Power Supply Unloaded

    Checking the Power Supply TESTING THE POWER SUPPLY UNLOADED If the power supply readings exceed the indicated tolerance it is possible that a defective component one of the other boards is drawing the power supply down. In this case, you should test the power supply unloaded before proceeding.
  • Page 19 Checking The Power Supply INCORRECT DIGITAL POWER SUPPLY VOLTAGES (Digital Supply +5Dl, +5D2, +VD) Simulator cable from J7 of tbe digital board. Turn the unit Simulator (see Section E). cable From tbc keypad/display board. Turn dx unit ON. Replace the Disk Drive Board.

  • Page 20: Checking The Display

    Checking the Display DISPLAY SELF-TEST MODE When the keypad/display is receiving power from the power supply but is not in proper communication with the digital board, the keypad/display board enters self-test mode. In self-test mode, the display remains blank until you press the buttons on the control panel. Pressing various control panel buttons will cause the display to print characters, home the cursor, etc.* Using Self-test Mode to Diagnose the Keypad/Display Board 1.

  • Page 21: Troubleshooting An Asr-10 With No Leds Lit 1

    Checking the Display TROUBLESHOOTING AN ASR-10 WITH NO LEDS LIT connections making Check Are the disulav voltages correct? (53 on Dower suoolv) No LEDs Lit Test the Dower su~ulv unloaded. Go to Incorrect Power Supolv Voltages ASR Service Manual...
  • Page 22 Checking the Display TROUBLESHOOTING AN ASR-10 ALL LEDS LIT, WITH ALL LEDS LIT, NO DISPLAY NO DISPLAY Are the power supply voltages correct? Y E S Force the unit into self-test mode Jumper the negative (left) side Cl9 to Din 13 of U20. Repair and retest.

  • Page 23: The Asr-10 Keyboard And The Kpc Simulator Board

    Kevboard and Footswitch Inuuts The ASR-10 Keyboard and the KPC Simulator Board The Poly-Key -r~ Pressure Keyboard on the ASR-10 (and the KPC simulator board on the Rack) is a complex module that contains its own computer and software. So, when necessary, you will be swapping it out as a whole unit.

  • Page 24: Asr-88 Keyboard

    ASR-88 Kevboard ASR-88 KEYBOARD The ASR-88 uses the same keyboard as the KT-88 that has “bubble” switches, the ASR-88 keyboard is only different in the adapter board. Instead of mechanical switches, this keyboard has a molded rubber bubble under each key. The keyboard circuit board has conductive carbon contacts printed on it (which appear as small black strips under each key).
  • Page 25 ASR-88 Keyboard If only one key is bad (or if groups of keys are bad but not in groups of eight or every eighth key), the problem could be any of the above. The first thing to do is remove the key and see if there is anything obviously wrong with the bubble: Look for damage to the bubble itself.

  • Page 26: Pressure Response Problems

    ASR-88 Keyboard Pressure Response Problems The ASR-88 keyboard, like the KT-88 and TS-12, has mono pressure response. This allows a modulation effect to increase as you press harder on a key. Pressing harder on any key will affect all other keys. To produce mono pressure, two pressure sensitive strips are inside the keyboard assembly.

  • Page 27: Error Messages

    Error Messages ERROR MESSAGES Occasional error messages are not unusual, and unless they become chronic, they are not a cause for concern. It is important to realize that these messages are diagnostics and do not necessarily indicate a problem. These messages were designed to help our software engineers in the development of the software, not as hardware diagnostics.
  • Page 28 Error MessaPes 05 current info in DIR buffer is not valid data 17 file size greater than limit = 33 Mbytes 06 current info in FAT buffer is not valid data 32-35 and 40*-44 NEC PD 72069 errors *Please note that error 40 error 040 are separate errors. Error 40 is always a disk controller or disk drive related problem.

  • Page 29: Figure 14 - Rom And Disk Compatibility

    ASR-1 O/88 SOFIWARE NOTES The O.S. version on the disk can be easily updated (call ENSONIQ Customer Service for the latest O.S. version). You cannot copy the O.S. to a disk onto which you have already saved instruments or sequences, but not the O.S. Attempts to do so will result in an error message.
  • Page 30 Press the right arrow button until the display shows COPY OS TO DISK. The OS. version on the disk can be easily updated (call ENSONIQ Customer Service for the latest O.S. version). You cannot copy the O.S. to a disk onto which you have already saved instruments or sequences, but not the O.S.
  • Page 31 Press EnteraYes. The display shows KEYBOARD VERSION ZZZ. For the Rack, this will always show 1. Version 1.25 disk (released 8 FEB 93) For ASR-10 Keyboards ONLY. This OS. update is intended for customers who have a keyboard with 1.00 ROMs but do not need or want the SCSI kit. (When they buy SCSI, they automatically get 1.50 ROMs if they don’t have them.) This release provides them with a method of upgrading their operating system without the expense of a ROM change.
  • Page 32 Software Notes Version 1.50 disk (released 28 JAN 93) This release contains some minor improvements and fixes for problems that have been discovered since the version 1.20 disk. The unit must have version 1SOB O.S. ROMs to use this disk. This is the original release for the Rack.
  • Page 33 Software Notes B. the destination disk does not already contain an operating system later than version 1.25 (i.e. 1 SO or 1.60). We still recommend using the COPY DISK command if users want to copy an Operating System that is different from the one that is currently running.
  • Page 34 default to 01 .Ol), the unit located to an invalid location (Bar 384.04). Pressing continue caused the Bar count to run on to 999. This problem has been fixed. Potential delay before entering SAMPLING or CREATE NEW INSTRUMENT: If the ASR has to SHUFFLE memory before entering Sarnplin g, no message was being displayed. The ASR remained frozen on a display while memory was being shuffled, though it did collect button presses.
  • Page 35 Notes Sample playback “skipping” occurs when playing back RAMTRACK audiosamples or regular wavesamples which are greater than 2M samples at 3OKHz. This problem can occur on any unit which has SM or 10M or ram. All other memory configurations work fine. The skipping usually starts at 43 seconds into the sample. The result is that the system will play random chunks of its sound ram (including the Operating System space which sounds like bursts of noise).
  • Page 36 Software Notes New Feature: Import non-ASR Instruments The ASR- 10 will now import and play sounds from the AKAI and Roland libraries. Unlike other programs that only load wavesample data and loop information, the ASR-10 conversion takes place at the AKAI program level and the Roland Patch level.
  • Page 37 If destination disk is a PC-formatted disk of the same density, the disk could be re-formatted as a g-sector ENSONIQ disk, which may or may not match the source disk. If it doesn’t match, the copy may fail. Version 3.00 now ensures that the destination disk inherits the same format as the source disk if formatting is required.
  • Page 38 VOICE: MINI mode - no sound: Layer glide mode = MINI was not dealing with simultaneous key downs properly. When multiple notes went down at the same time, the result would be no audio output. (Granted, this mode dictates that you play monophonically. But if you played a chord you should hear at least one note sound.) This problem originated in Beta version 2.72.

  • Page 39: Asr Test Procedure

    ) Turn unit on. All the LEDs above the Instrument buttons should turn on and the display should read ENSONIQ ASR- 10, (then for Racks and keyboards with SCSI: SCSI INSTALLED, SEARCHING FOR SCSI DEVICE), then PLEASE INSERT DISK.
  • Page 40 ASR Test Procedure xxx = # of times the test passed, yyy = # of times the test failed e) Press Cancel*No to stop the test. The display shows: MIDI LOOP If it fails, check the following: MIDI cable connection and digital jack board to digital board cable.

  • Page 41: Disk Check

    ASR Test Procedure o) Press CancebNo to exit this page. If any one fails, check connections to the appropriate module. If they all fail, the digital board is possibly at fault. 6. Disk Check a ) Select MOOG POP 1 (press Instrument*Sequence Track 3). b) Press Command, Instrument.

  • Page 42: Oex-6Sr Check

    ASR Test Procedure m) Press EntereYes. The display will read PICK SAMPLE INSTRUMENT. Press Instrument*Sequence Track 8. The Level Detect VU screen will appear. Since the input level should be the same as that of the last sample, there is no need to readjust the Input Level knob.
  • Page 44 Analog Jock Board Keyboord Assembly...

  • Page 45: Section A - Replacing The Digital Board

    Replacing the Digital Board 1. Remove all cables connected to the ASR-10, including the power cord. Removing 2. Turn the unit upside-down and remove all the screws from the base and rear panel. 3. Using a scribe, disconnect the following cables from the main board: a ) JlO - 34-pin ribbon cable to the disk drive, b) 58 - 6-pin cable to the wheel and patch select board, c) 57 - 20-pin ribbon cable to the keyboard,...

  • Page 46: Section B - Replacing The Analog Board

    J2 - lo-pin ribbon cable to the analog jack board, and d) 54 - 20-pin ribbon cable to the analog jack board. Remove the six (6) screws (ASR-88 has 4 screws and 2 stand offs) from the analog board:...

  • Page 47: Section C - Replacing The Power Supply Board

    The connector on the g-pin cable from the transformer has a high retention force. Please use a scribe, screwdriver, or similar tool to remove it. Do not pull on the wires! 9. Remove the six (6) screws (4 screws on the ASR-88) that hold the power supply board to the unit: a) Three (3) SEMs from heatsink to keyboard bracket, and b) Three (3) #8 screws into the back extrusion.

  • Page 48: Section D - Replacing The Keypad/Display Board

    Replacing ASR-I O/88 Modules Replacing the Keypad/Display Board Removing 1. Remove all cables connected to the ASR-10, including the power cord. 2. Remove the volume and data entry knobs. 3. Turn the unit upside-down and remove all the screws from the base and rear panel. 4.

  • Page 49: Section E - Replacing The Keyboard (Asr-10)

    16. Connect Jl 24-pin ribbon cable and J2 7-pin power cable to the keypad/display board. Make sure to do this before installing the keypad/display board because the connectors are difficult to reach once the board is installed. 17. Place the keypad/display board into the unit. Make sure that the buttons are through the holes in the front panel.

  • Page 50: Section E - Replacing The Keyboard (Asr-88)

    Mounting Brack Replacing the Keyboard (ASR-88) 1. Remove all cables connected to the ASR-88 including the power cord 2. Turn the unit upside-down and remove all the screws from the base and rear panel. 3. Remove the digital board (see Section A).

  • Page 51: Section F - Replacing The Digital Jack Board

    d. The long narrow bracket that was connected to the first bracket you removed. There should be just one screw holding this bracket in place at this point. e. The bracket that is secured to the front of the ASR frame and the center mount of the keyboard assembly.

  • Page 52: Section H - Replacing The Disk Drive

    a) J8 - 20-pin ribbon cable, and b) J7 - lo-pin ribbon cable. 5. Remove the four (4) screws that hold the analog jack board to the I/O bracket. 6. Lift the left end above the analog bracket and slide the jacks, pot, and switch out of holes in the I/O bracket.

  • Page 53: Section J - Replacing The Line Filter

    d) T7 - red wire to the line filter. 4. Remove the two (2) flat head screws from the line filter. 5. Pull the line filter through its hole in the I/O bracket to the outside of the unit. Let it hang by the wires.

  • Page 54: Section K - Installing And Removing The Scsi Board

    Replacing ASR-I O/88 Modules Installing and Removing the SCSI Board Installing 1. Remove all cables connected to the ASR-10, including the power cord. 2. Turn the unit upside-down and remove all the screws from the base and rear panel. 3. Disconnect both ends of the 34-pin ribbon cable that connect the digital board (J6) to the analog board (Jl).

  • Page 55: Section L - Replacing The Digital I/O Option Board

    12. Place the bottom plate on, but don’t install any screws yet. 13. Turn the unit right side up. Turn it on and watch the display. 14. Verify that the display shows ENSONIQ ASR-10, then SCSI INSTALLED, then SEARCHING FOR SCSI DEVICE.

  • Page 56: Figure 23 - Installing A Di-10 Board Into An Asr-10 Keyboard Unit

    Replacing ASR-I O/88 Modules Remove any cable clips Mylar Insulator between disk beneath e DI-10 Board drive ca Ie and Didtal I/O Board DI-10 through rounded cable clamp Digital Jack Board Analog Jack Board Analog Main Board Power Cable Figure 23 - Installing a DI-10 Board into an ASR-10 Keyboard Unit NOTE: If you accidentally put the board on in the wrong way, it may be removed by pushing in the center tab of each plastic standoff.

  • Page 57: Section M - Replacing The O.s. Eproms

    Replacing ASR-1 O/88 Modules Replacing the O.S. EPROMs The ASR-10 operating system can be updated by replacing the O.S. EPROMs. Each ASR-10 has two Operating System EPROMs located on the digital board near the OTTO chip (U29). R e m o v i n g 1 . Remove all cables connected to the ASR-10, including the power cord.

  • Page 58: Section N - Replacing The Wheel Assembly

    4. Remove the four (4) screws from the wheel brackets (2 from each bracket). NOTE: If the mounting posts for the wheel brackets are broken, call ENSONIQ for a new wheel cover that has the posts reinforced. 5. Remove the three (3) screws from the patch select/wheel board.

  • Page 59: Figure 24 - Asr-1Or Exploded View

    Figure 24 - ASR-1OR Exploded View ASR Service Manual...

  • Page 60: Replacing Asr Rack Modules

    Replacing ASR Rack Modules Replacing the Rack Digital Board Removing 1. Remove all cables connected to the ASR-10 Rack, including the power cord. 2. Remove the lid (see below). 3. The digital main board is the large board on top that you see when the lid is off. Disconnect all cables from the digital board: a) J2 Power 7-pin, b) Jl Display, 24-pin ribbon,...

  • Page 61: Section B - Replacing The Rack Analog Board

    REATTACHING THE LID IMPORTANT! Be sure to install all screws with a hand screwdriver to avoid stripping the holes. ASR-10 Racks with serial numbers between 10000 and 10500, the rack ear screw PEMs (screw mounting standoffs) may fall inside the unit. Installing 1.

  • Page 62: Section C - Replacing The Rack Power Supply Board

    Replacing ASR Rack Modules 9. Install the four (4) SEMs into the analog board heatsink. 10. Reconnect the cables (see step 5). 11. Install OEX-6sr board (see Section N). 12. Install the PCB Mounting Bracket: a) Connect the 26-pin rear panel connector cable into Jl of the SCSI board, b) Slide entire assembly toward the back of the unit.

  • Page 63: Section D - Replacing The Rack Keypad/Display Board

    9. Reinstall the power supply screws. Carefully reconnect the four cables and six wires, paying particular attention to the alignment of pins and connectors. 10. Install the PCB Mounting Bracket: a ) Connect the 26-pin rear panel connector cable into Jl of the SCSI board, b) Slide entire assembly toward the back of the unit.

  • Page 64: Section E - Replacing The Rack Kpc Simulator Board

    Replacing ASR Rack Modules Replacing the Rack KPC Simulator Board Removing Remove all cables connected to the ASR-10 Rack, including the power cord. Remove the lid (see Section A). Disconnect the 20-pin ribbon cable from the IWC simulator board. Pop the KPC simulator board from the four white standoffs by squeezing the standoffs. If this is difficult, you can remove the front panel (see Section D).

  • Page 65: Section H - Replacing The Rack Disk Drive

    Replacing ASR Rack Modules 5. Disconnect 20-pin ribbon cable from J8 of the analog jack board: 6. Remove the four (4) 6-32 machine screws that hold the board to the PCB Mounting Bracket tabs, and remove the board from the unit. Installing 7.

  • Page 66: Section I - Replacing The Rack Transformer

    Replacing ASR Rack Modules SECTION Replacing the Rack Transformer Removing 1. Remove all cables connected to the ASR-10 Rack, including the power cord. 2. Remove the lid (see Section A). 3. Remove the PCB Mounting Bracket (see Section 0). 4. Disconnect the transformer cables and wires to the power supply. 5.

  • Page 67: Section K - Replacing The Rack S C S I Board

    Replacing ASR Rack Modules SECTION Replacing the Rack SCSI Board 1. Remove all cables connected to the ASR- 10 Rack, including the power cord. Removing 2. Remove the lid (see Section A). 3. Remove the PCB Mounting Bracket (see Section 0). 4.

  • Page 68: Figure 25 - Top Side Of The Asr-10 Rack Pcb Mounting Bracket

    run dual shielded cable on top of ledge Figure 25 - Top Side of the ASR-10 Rack PCB Mounting Bracket 6. Connect the 20-pin ribbon to 53 of the DI-10 board (single bend end) and the other side to 7. Plug one end of the dual shielded cable onto Jl on the DI-10 board. This connector is keyed so it will only go on one way.

  • Page 69: Section M - Replacing The Rack O.s. Eproms

    Replacing ASR Rack Modules Replacing the Rack O.S. EPROMs R e m o v i n g 1 . Remove all cables connected to the ASR-10 Rack, including the power cord. 3 -. Remove the lid (see Section A). Installing The two Operating System EPROMs, LOWER (U19) and UPPER (U22), are located in the center of the digital board next to the OTTO chip (see Figure 15).

  • Page 70: Section 0 - Replacing The P C B Mounting Bracket

    ASR Rack Modules SECTION Replacing the PCB Mounting Bracket Removing 1. Remove all cables connected to the ASR-10 Rack, including the power cord. 2. Remove the lid (see Section A). 3. Disconnect the 20-pin ribbon cable from Jl of the digital board. 4.

  • Page 71: Figure 27 - Simm Layout

    What SlMMs to Use The ASR-10 and ASR-88 mainboard has been redesigned to change the type of SIMMs that can be used, and the way that you install the SIMMs. The new mainboard is used starting from the following serial...

  • Page 72: Figure 28 - Board Differences

    What Changed? The newer board can accept 2 chip and 8 chip memory parts. The older board can only use the 8 chip parts. Since the 2 chip parts are becoming more common (and possibly less expensive) we redesigned the board to allow you to use them. How to Tell Which Rev Board You Have The old rev board looks like this: Jumper is connected for...
  • Page 73 Are they DRAM SIMMs? When adding memory, only install DRAM SIMMs in the expansion slots. The ASR will not accept static RAM or ROMs. How Many DRAM Chips (New Rev)? It doesn’t matter how many (what size) DRAM chips are on the SIMM. The 1 MegaByte SIMiMs can be based on either 1 Megabit (8 chips) or 4 Megabit ( 2 chips) DRAM chips and the 4 MegaByte SIMMs can be based on either 4 Megabit (8 chips) or 16 Megabit (2 chips) DRAM chips.

  • Page 74: Figure 29 - Simm Access On The New Rev Board

    SIMM Size Jumpers (2) - STANDARD SIMM are set to 1 M (1 MegaByte Memory. Move to the other SIMMS). Move the pins when using expansion jumpers to the 4M SIMM slots. positions when changing to 4 MegaByte SIMMS. Figure 29 - SIMM Access on the new Rev Board You will notice that there are two slots with SIMMs installed, and two slots that are empty.

  • Page 75: 30 - These Are The Only Configurations That Will Work Properly

    4M pins 4M pins 16 MegaBytes 8 MegaBytes This is how the ASR-88 is shipped from ENSONIQ Figure Accessing SlMMs (old Rev board) To access the SLMMs an ASR- 10 keyboard , make sure all cables, especially the power cable, are unpluggedfrom the ASR-10.

  • Page 76: Figure 33 Simm Socket Components

    You will notice that there are two slots with SIMMs installed, and two slots that are empty. These empty slots are called Expansion SIMM Slots, and are used for adding additional SIMMs (when expanding the memory). Directly above the Standard SIMM Slots, you will find the Memory Expansion Jumper.

  • Page 77: Figure 34 - Removing Simms

    To Remove a SIMM from a SIMM Socket: Bend thetwo retaining pods out of the way... just far enough to remove the SIMM Figure 34 - Removing SIMMs posts as far apart as needed to clear the board; these posts can easily break if too much force is applied.
  • Page 78 ASR-10 keyboard unit) contains internal termination via removable resistor packs (do not remove the resistor packs unless directed by the ENSONIQ Customer Service). Note that the ASR-10 supplies power to its own terminator only. Therefore, any SCSI storage devices used with the ASR-10 must supply power to the SCSI bus.
  • Page 79 SCSI Infomation The SCSI device selected is not an ASR-10 formatted storage device, NOT AN EPS SCSI DEV and cannot be used by the ASR-10, or a non-ENSONIQ CD ROM is loaded in a connected CD ROM drive. What to do: You may choose to reformat the SCSI drive for use with the ASR-10.

  • Page 80: Digital I/O Information

    Digital I/O Information Digital I/O Information The ASR-10 must have O.S. EPROMs version 1SOB or higher for an optional DI-10 Digital I/O Interface board to work. The optional DI-10 Digital I/O Interface board (S/PDIF) allows the customer to move sound data directly into or out of the ASR-10 without going through additional A/D or D/A conversion.
  • Page 81 Even individual to different outputs for discrete external effects processing (such as with the ENSONIQ DP/4 Parallel Effects Processor). The design of this product resulted from customer requests for a multi-purpose output device that could be configured with stereo outputs and/or individual outputs.
  • Page 82 NOTES...
  • Page 83 Screws with star washers attached. Single In-line Memory Module Termination Termination filters out noise introduced by hard drives or computer power supplies so the noise doesn’t confuse the SCSI software. MODULE PART NUMBERS ASR-88 Kevboard Rack Boards Digital Board 4090017101...
  • Page 84 Customer Tech Support: l-610-647-3930” *This is the phone number to give customers that want to contact ENSONIQ directly (U.S.A). Use the ENSONIQ Automatic Fax Retrieval System: l-800-257-1439 or l-610-408-0741 outside of the US When contacting ENSONIQ Customer Service, please have the following information ready:...

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