ASR Service Manual -

Important
IMPORTANT THINGS TO KNOW ABOUT THE ASR-1 O/88
About this manual: The instructions in this manual are for both the ASR-10/M? Keyboard and Rack unless otherwise noted. When you are troubleshooting an ASR Rack and the instructions say to check the keyboard, substitute a check of the KPC simulator board. When you are troubleshooting an a ASR-88 and the instructions say to check the keyboard, substitute a check of the keyboard adapter board. As with every ENSONIQ product, all ASR service is handled through the ENSONIQ Module Exchange Program. Rather than diagnose and exchange individual components, you will replace complete modules. We feel that this is the most time and cost effective method of repair, both for you and your customers. Known Areas of Concern The four known problem areas of ASRs have been: 1) SIMMs; 2) the disk drive; 3) distorted sound; and 4) fuses blowing. Those items marked with a G+= are known areas of concern, other items are important things to know about the ASR. * Avoid Damage from ESD (Electra Static Discharge) !!! How can we minimize the possibility of causing ESD dama,e ? Here are some procedures you can follow 0 when working on ENSONIQ products. l Before beginning any work you should be grounded. Discharge any static electric charge built up on the body. This will be accomplished by using a ground strap that attaches to your wrist and ground leaving your hands free to work. l Always look for ESD warnings before opening any packages from ENSONIQ. l Always avoid unnecessary physical movement, such as scuffing the feet when handling ESD sensitive devices. That kind of movement can generate additional charges of static electricity. l Minimize handling of ESD sensitive devices. Keep ESD sensitive devices in their static free packages until needed. Only transport or store ESD sensitive devices in their protective packages. l When handling ESD sensitive devices, avoid touching any connector pins, leads, or any other electrical connections on the board. Try to handle ESD sensitive devices by the edges only.

a=SIMMs

Often a customer may think that a unit is broken, when it simply does not have the correct SIMMs installed. It is important to thoroughly qualify the SIMMs that are installed before troubleshooting further. Read and understand the following notes about SIMMs, and refer to the special SIMMs section at the rear of this manual to be sure a customer is not experiencing problems due to incorrect SIMMs, or SIMMs that are not installed properly. 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: ASR-ASR- 1 ORack 014567

ASR-10 w/SCSI 13126

ASR-88 -

all units

4SR Service Manual
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. 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:

Important GF OEX-6sr CONNECTOR ON ASR KEYBOARD AND ASR-88 CAUTION!!! IMPORTANT!!! OOed The OEX-6sr should never be plugged in or unplu,, 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. This connector does not simply supply audio outputs and signal ground and, therefore, cannot be used to generate separate outputs without the OEX-6sr. The ASR generates digital signals that must be converted externally. The signals present on this connector include digital control signals and +/- 15VDC. Improper connections to these signals could easily damage the ASR or any external device connected.

HOW THE ASR WORKS

W This section should help you understand what each module in the ASR does. Reading this may help you decide what module is faulty by just knowing the ASR system better. The ASR- 10 is a powerful self-contained computer system. It offers users the ability to accomplish many tasks, some of these are: Sampling audio information from external sources Resampling its own audio output Adding digital effects to samples Sequencing Digital audio track recording Disk storage and retrieval The ability to accomplish these tasks makes the ASR-10 a complex system. Figure 6 shows the ASR-10s main components as a complete system.

l l l l l l

WHEEL ASSEMBLY m ONLY) 9. KEYPAD/DISPLAY BOARD I I 6. KEYBOARD

(KPC BOARD ON RACK)

13. PATCH SELECT BmON BOARD

(KFfBOARO ONLY)

I --------s-s

I ,,-----a

Figure 6 - ASR Block Diagram
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: 1. Disk Drive 2. Power Supply Board Data storage and retrieval device. Converts AC voltages to regulated DC and unregulated AC and DC to be distributed throughout the system. Connections to facilitate the use of the optional digital I/O board. MIDI jacks, CV pedal jack, and footswitch jacks Optional board that enables the ASR-10 to use digital audio data directly from a digital source, such as DAT. It also allows the ASR-10 to output digital audio data directly to a digital recorder, such as DAT. The engine of the ASR-10. It has the microprocessor, the sound processor, operating system memory, sound memory, effects processor, and floppy disk controller. It also has the circuitry to control all inputs to and outputs from the system. Sends performance information (note on, note off, pressure) to the ASR10 digital board. Also handles communications to and from the keypad/display board. Has the input pre-amp circuitry on it, all of the audio inputs and outputs (except for OEX-6). Converts analog audio signals into digital audio signals and passes them to the digital board. Converts digital audio signals to analog audio signals and supplies them to the audio outputs and headphone amplifier Transmits button presses to the digital board through the keyboard, and receives display data from the digital board through the keyboard. See figure 7 for further details. Allows access to SCSI devices for storage and retrieval of data, and disk track digital recording. It is an optional board on the ASR- 10 keyboard. Optional board on the ASR-10 keyboard. Adds three additional stereo D to A converters for six additional analog outputs.

3. Digital Jack Board

4. Digital I/O Board

5. Digital Board

6. Keyboard (KPC Board on Rack)

7. Analog Jack Board

8. Analog Board

9. Keypad/Display Board

10. SCSI Board

ll.OEX6sr Board

.12. Pitch and Mod. Wheel Assembly
Transmits pitch and modulation wheel movements to the digital board. It is not included on the ASR-10 rackmount.
ImDortant 13. Patch Select Button Board Transmits patch select button presses to the digital board. It is not included on the ASR-10 rackmount.
The ASR-10 was designed with the analog and digital sections on different boards, and the analog and digital jack boards separate, for some specific reasons. l Only the digital board requires a four-layer circuit board so there is a cost savings using a two-layer board for the analog section. l It is easier to break the connections between the analog board and the digital board to install the optional optically isolated SCSI board. This ensures that no matter how much digital noise is induced on the digital board due to SCSI, it wont reach the analog section. l Having separate jack boards allows the interface points with the outside world to be placed away from circuitry that can be damaged by Electra Static Discharge that can be introduced at these points. This decreases the instruments susceptibility to damage from ESD. Keyboard and Rack Similarities The Keyboard and the Rack use the same operating system (OS.) disk. The ASR-88 uses different EPROMs. All circuit boards except the keypad/display board are the same for both the keyboard and the rack. However, there are physical differences that will require you to specify for which unit you are ordering parts. Instead of a Poly-Key keyboard assembly, the Rack has a KPC simulator board. The KPC simulator board passes information between the keypad/display board and the digital board (like the keyboard does for the keyboard unit). In the rest of this manual, whenever you see keyboard, substitute KPC simulator for the Rack and keyboard adapter board for the ASR-88 (except where otherwise noted). The ASR Rack has the 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. Communications Path It is important that you completely understand the communications path of the ASR. Please read this carefully. The ASR digital board, keypad/display board and keyboard are complete computer systems in themselves, each with its own microprocessor and operating software. The modules communicate with each other using serial communication ports. Whenever a key is played on the keyboard, for example, the keyboard assembly microprocessor transmits this information to the microprocessor on the digital board. The keypad/display board communicates with the digital board through the keyboard. Whenever the digital board wants to put a message on the display, it sends the message to the keyboard which then passes it on to the display. Whenever a button is pressed on the control panel, the keypad/display boardsends the message to the keyboard which, in turn, passes it on to the digital board. The communications path is shown in Figure 7. The digital board communicates with the keyboard over a two-line asynchronous interface carried by the 20-pin keyboard ribbon cable. The keyboard communicates with the keypad/display board over a three-line synchronous interface that is carried over to the digital board via the 20-pin ribbon cable, then up to the keypad/display board via the 24-pin ribbon cable.

l l l l

So&are Notes
Press EnteraYes. always show 1.
The display shows KEYBOARD VERSION ZZZ. For the Rack, this will
Version 1.25 disk (released 8 FEB 93) For ASR-10 Keyboards ONLY.
This disk is only compatible with 1.00 ROMS. This is not u typical O.S. Release? 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 dont have them.) This release provides them with a method of upgrading their operating system without the expense of a ROM change. Because this was a patch to the existing 1.20 O.S. disk, there are some known problems that still exist in this release. The purpose of this release is to address the serious problems that can cause a crash or corrupt data. No new features are added. SEQUENCER Loading SINGLE sequences from disk corrupted parameters of sequence that was currently selected. The selected sequence inherited the following parameters from the sequence being loaded: loop switch, tempo, time signature, sequence length in bars. Symptoms that would show include: keeping new after track edit results in no data left on track or extra events on track, tempo mysteriously changing on sequence, bar counters looping prematurely or beyond the actual end of the sequence data. Auto-locate malfunctioning on specific sequence. This problem has been in existence since 1.OO. It has been addressed in version 1.25. QUANnZE track had a problem that caused track cleaner to erase the track. Symptom will be that user quantizes, track auditions tine. but is erased on a keep new. Not extremely likely, but you will get some calls about this. The quantize problem has been around since the EPS days, but the track cleaner (which was introduced in version 1.20) makes the problem much more visible. In version 1.05, an improperly quantized sequence may have played tine but subsequent track edits or overdubs could crash the system or destroy other sequence data. The quantize problem has been fixed in version 1.25, the track cleaner is still in place. Attempting to change the length of a song track through the CHANGE SEQUENCE LENGTH command resulted in ERROR 129. This command is not available for song tracks. The only way to change the length of a song is to edit song steps. If user attempts to run the change sequence length command when a song is selected, version 1.25 now displays SELECT SEQUENCE FIRST message. WAVESAMFLE EDITS l Performing a command like FADE IN on a Stereo sample with STEREO LAYER LINK ON caused the ASR to stop recognizing WS numbers when you play the keyboard. Inc/dec keys do not function properly for wavesample selection. This is a BIG problem introduced in version 1.20 that can happen when you do any stereo wavesample command that gives you an audition. Wavesamples may appear in both layers or may have moved from one layer to the companion layer. The only way to recover your instrument is to rebuild the instrument layer/wave maps by creating a new instrument and copying over the wavesamples to the new instrument, then deleting the old instrument. If you suspect this problem, heres how you can check your stereo instruments for valid layer/wave maps: 1. With STEREO LAYER LINK ON, select the left layer, then select the wavesample field. 2. Use the up-arrow to scroll through all wavesamples. Verify all the wavesamples for that layer exist. 3. Repeat this on the same layer using the down-arrow. Any discrepancies indicate a bad layer map. 4. Select the right (companion) layer and repeat steps 2 and 3. Also verify that no wavesample appears in both the left and right layer. This problem has been addressed in version 1.25. MISC l A low-level bug existed that could cause the system data to be corrupted. Due to the nature of this bug, the exact circumstances that would cause a problem and the symptoms that would show up are entirely unpredictable. This has been addressed in version 1.25. KNOWN PROBLEMS J.N VERSION 1.25: The following problems are known to exist in version 1.25. If a customer has 1.00 ROMs and is reporting any of the following problems, the 1.25 O.S. disk will NOT solve his problem. The only recourse is for the customer to upgrade to I.50 ROMs. MERGE TRACK COMMAND incorrectly allows you to specify ranges. The ranges are ignored when the command executes and the merge is performed over the entire track. Version 1.50 no longer allows ranges to be specified for this command, but this problem still exists in version 1.25. AUDIO GLITCHES (distortion, loss of stereo phase) that occur intermittently when all sequencer tracks are playing. It is NOT voice stealing or effects related. This is due to OTTO losing sync of the beginning of the sample. Low probability. NOT addressed in version 1.25. TIME COMPRESS/EXPAND is still not 100% reliable. Some portions of samples may not compress or expand at all. Other sections may compress too much. Particularly noticeable with jam loops. It appears that experimenting with the quality value can correct the problem. (For example, a sample that would not compress at quality of 25 would compress at a quality of 26.) The algorithm is being reviewed. A change should be forthcoming that at least reduces the chances of failure. (Note that the audition gives you an accurate picture of what the compression/expansion has done, and keeping the old will leave the original wavesample intact.) Also note that time compression/expansion of stereo samples may result in loss of phase. (Thats the way it is.) Still a problem in version in 1.25 and 1.50. Attempting to edit the KEY RANGE with the data slider for samples that have STEREO LAYER LINK=ON results in LAYER EDIT NOT ALLOWED. Not addressed in version 1.25, use incfdec buttons or keyboard to set wavesample key ranges. MACRO files will not load. Still a problem in version 1.25. MACRO files will not save correctly. Saving a macro file to floppy disk results in display saying SAVING ASR-10 OS. This is a display anomaly only, the O.S. is not being overwritten. Still a problem in version 1.25. A problem exists in the logic that waits for Enter or Cancel to be hit. A typical example would be some floppy disk commands (COPY OS DONE. ANOTHER?). We found that if the user does nothing for 60-seconds, the system will timeout and the timeout logic could lockup the display. Still a problem in version 1.25. ENTER PLAYS KEY feature does NOT exist in version 1.25.

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.
NEW FEATURE ENTER PLAYS KEY feature has been added to this release. The Enter button can be used to trigger sample playback. For more details, see the 1 SO Manual Addendum. SEQUENCER Loading SINGLE sequences from disk corrupted parameters of sequence that was currently selected. The selected sequence inherited the following parameters from the sequence being loaded: loop switch; tempo; time signature; sequence length in bars. Symptoms that would show include: keeping new after track edit results in no data left on track or extra events on track; tempo mysteriously changing on sequence; bar counters looping prematurely or beyond the actual end of the sequence data. Auto-locate malfunctioning on specific sequence. This problem has existed since 1.0. QUANTIZE track had a problem that caused track cleaner to erase the track. Symptom will be that user quantizes, track auditions fine, but is erased on a keep new. Not extremely likely, but you will get some calls about this. The quantize problem has been around since the EPS days, but the track cleaner (that was introduced in version 1.20) makes the problem much more visible. In version 1.05, an improperly quantized sequence may have played fine but subsequent track edits or overdubs could crash the system or destroy other sequence data. The quantize problem has been fixed in version 1.50. the track cleaner is still in place. Attempting to change the length of a song track through the CHANGE SEQUENCE LENGTH command resulted in ERROR 129. This If user attempts to run the command is not available for song tracks. The only way to change the length of a song is to edit song steps. change sequence length command when a song is selected, version 1 SO now displays SELE(JT SEQUENCE FIRST message. MERGE TRACK COMMAND incorrectly allowed you to specify ranges. The ranges are ignored when the command executes and the merge is performed over the entire track. Version 1.50 no longer allows ranges to be specified for this command. AUDIO Audio glitches (distortion, loss of stereo phase) that occur intermittently when all sequencer tracks are playing. It is NOT voice stealing or effects related. This is due to OTTO losing- sync of the beginningI of the samole. This has been addressed. I WAVESAMPLE EDITS Attemotinz to edit the KEY RANGE with the data slider for samoles that have STEREO LAYER LINK=ON results in LAYER EDIT 1 NOT ALLOWED. Addressed in version 1.50. Performing a command like FADE IN on a Stereo sample with STEREO LAYER LINK ON caused the ASR to stop recognizing WS numbers when you play the keyboard. Inc/dec keys do not function properly for wavesample selection. This is a BIG problem introduced in version 1.20 that can happen when you do any stereo wavesample command that gives you an audition. Wavesamples may appear in both layers or may have moved from one layer to the companion layer. The only way to recover your instrument is to rebuild the instrument layer/wave maps by creating a new instrument and copying over the wavesamples to the new instrument, then deleting the old instrument. If you suspect this problem, heres how you can check your stereo instruments for valid layer/wave maps: 1. With STEREO LAYER LINK ON, select the left layer, then select the wavesample field. 2. Use the up arrow to scroll through all wavesamples. Verify all the wavesamples for that layer exist. 3. Repeat this on the same layer using the down-arrow. Any discrepancies indicate a bad layer map. 4. Select the right (companion) layer and repeat steps 2 and 3. Also verify that no wavesample appears in both the left and right layer. MACRO FILES Macros would not load correctly. This has been fixed in version 1.50. Saving a macro tile did not work. Trying to save a macro file to floppy disk resulted in display saying SAVING ASR-10 OS. Macro files save correctly in version 1.50. MIX A problem was found with the logic that waits for Enter or Cancel to be hit. A typical example would be some floppy disk commands (COPY OS DONE. ANOTHER?). We found that if the user does nothing for 60-seconds, the system will timeout and the timeout logic could crash the machine. In version 1.50, the message is simply redisplayed after 60 seconds. KNOWN PROBLEMS/OMISSIONS IN 1.50. The following commands are currently disabled in version 1 SO: COPY SCSI DEVICE and SCSI BACKUP RESTORE. TIME COMPRESS/EXPAND is still not 100% reliable. Some portions of samples may not compress or expand at all. Other sections may compress too much. Particularly noticeable with jam loops. It appears that experimenting with the quality value can correct the problem. (For example, a sample that would not compress at quality of 25 would compress at a quality of 26.) The algorithm is being reviewed. A change should be forthcoming that at least reduces the chances of failure. (Note that the audition gives you an accurate picture of what the compression/expansion has done, and keeping the old will leave the original wavesample intact.) Also note that time compression/expansion of stereo samples may result in loss of phase.

l l l l l l l l l l l l

STORAGE / SYSTEM COPY SCSI DEVICE and SCSI BACKUP/RESTORE commands have been enabled, COPY OS command would not work when trying to copy an operating system that was compatible with I.00 ROMS (1.00 thru 1.25). In version 1.60, these older versions can be copied provided the following rules are met (othenvise an error message is displayed): A.source and destination disk must be the same density, and
Version 1.60 disk (released 25 FEB 93) This release contains some minor improvements and fixes for problems that have been discovered since the version 1.50 disk. The unit must have version 1SOB O.S. ROMs to use this disk. The following problems have been addressed in version 1.60.

ASR Service kfanuul

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. LOAD BANK or LOAD SONG file had a problem that could cause the machine to lock up or crash when loading songs into the ASR-10 if those songs or banks were originally created and saved on an EPS or EPS 16 PLUS. This problem has been fixed in 1.60. SEQUENCER Loading SINGLE sequences from disk still had a problem where parameters of the currently selected sequence or the sequence being loaded could become corrupted. This was a timing problem that made it intermittent, depending on how busy the system was at the time the load completed. Symptoms that would show include: keeping new after track edit results in no data left on track or extra events on track, tempo mysteriously changing on sequence, bar counters looping prematurely or beyond the actual end of the sequence data. This problem has been addressed in 1.60. WAVESAMPLE COMMANDS In version 1.60, a modification was made to TIME COMPRESS/EXPAND so that it is much more likely to find a valid splice point. This will reduce the chance of a failure. Again, the audition does give you an accurate account of what the command has done. Let your ears be the judge. Also note that time compression/expansion of stereo samples may result in loss of phase. This is due to differences in the left/right data streams and is not a problem with the algorithm.
Version 1.61 disk (released 16 APR 93) The unit must have version 1SOB O.S. ROMs to use this disk. The following problem was discovered in O.S. Version 1.60 and has been addressed in Version 1.6 1:

ASR-10 Version 3.08 Release Notes
The ASR- 10 Version 3.08 Operating System (DISK only) has been tested and is ready for release to production. All ASR-10 models (keyboard, rack, and keyboard with SCSI) will be getting this O.S. (p/n 853oooOll3) as a running change. The EPROM update kit, which is included in the SP-3 and DI-10 service kits, will also pick up this change. For customer service updates, the OS. Disk requires version 1 SO ROMs. Note regarding Operating System size. The Operating System size has not changed since Version 3.00. Customers who are upgrading from Version 2.will see that the Operating System requires 160 more blocks. (See Version 3.00 release notes.) Software Changes: No new features have been added to this release. This release addresses the following problems that have been reported since Version 3.00:

Sofhvare Notes

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. It is now fixed. VOICE- TRIGGER or LEGATO mode - System Error: Layer glide mode = TRIGGER or LEGATO could cause a system error 129 if multiple notes were played when the system is first booted up. This was an initialization problem that would normally not cause a problem. The only reason that it was found was a demo sequence from the disk DSAX-001 started with a piano chord programmed with the mode = TRIGGER. Version 3.08 fixes this problem. IMPORT ROLAND - SOME PATCHES DO NOT IMPORT: From Roland CD-ROMs, if the CD was fairly full, some sounds would not show up in the directory listing, or they would show up but attempting to load them would result in a file operation error. This has been fixed in Version 3.08. IMPORT AKAI - SOME PROGRAMS DO NOT IMPORT: Some CD-ROMs in AKAI format may not show all of the programs in a particular volume. This can happen if the CD ROM has wavesample files interleaved with program files within the same volume (instead of grouping all files of a similar type.) This has been fixed in Version 3.08 IMPORT AKAI: TICKS and POPS: Some AKAI sounds were importing with pops or ticks in the loop or at the beginning of the sample. The problem was an offset in where the sample starts. Version 3.08 fixes this problem. A work-around in previous OS versions is to adjust the sample start point by increasing it by 5. Same with Loop Position. This work-around should fix most ticks caused by this problem. IMPORT ERROR 133: AKAI program Latin Percussion from IN-Vision Disk #6 Volume 7 caused an IMPORT ERROR 133. This error could occur with other A&I imports as well, depending on the particular CD-ROM. This problem has been fixed. IMPORT AFTERTOUCH ROUTING: AKAI Import always hard-coded aftertouch routed to Filter modulation amount as 0. This has been fixed. IMPORT AKAI: WAVESAMPLE FINE TUNING: Wavesample fine tuning on AKAI programs may cause a wavesample key group to be out of tune with the rest of the keyboard. This has been fixed in Version 3.08. Note that AKAI samplers implement a wavesample fractional loop point that our architecture does not support. If the program uses wavesample fractional loop points, the result is that the wavesample will play in tune until the loop end point is reached, then the loop will go slightly sharp or flat. No workaround for this, its in the voice chip. IMPORT INTO LAST BIN RESULTS IN NO FREE INSTRUMENTS MESSAGE Importing into the last free instrument location of the ASR-10 results in a successful import but the command exits with a NO FREE INSTRUMENTS message. The command was successful, but the message should not have been displayed. This has been fixed in Version 3.08. PHASER+REVERB EFFECT ALGORITHM REPLACED The PHASER+REVERB algorithm could cause intermittent ticks and pops. This algorithm has been replaced in Version 3.08 to correct this problem.

ASR-10 Version 3.53 Release Notes
This operating system addresses the problem of global parameters not being loaded properly on bootup.
ASR Test Procedure AM-TEST PROCEDURE The following procedure will aid in troubleshooting the unit. To do the following tests you will need a MIDI cable, a Dual Foot Switch (model SW-5/10), and a Control Voltage Pedal (model CVP-1). The ASR-10 should be connected to a sound system in stereo. 1. Power Up and Load in Sounds a ) 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. b) Insert a factory ASR-10 O.S. disk. The display should read LOADING SYSTEM. The keyboard unit will then display TUNING KBD - HANDS OFF. When the keyboard is tuned, all LEDs should go off. c ) The display should show FILE 1 TUTORIAL BNK (if it doesnt, press the up or down arrow button until it does). d) Press Enter-Yes. The display will say LOADING <filename> while loading. e) The bank is done loading when the display shows BANK LOAD COMPLETED. The following sounds will be loaded into the Instruments*Sequence Track 1 through 6: Instrument 1 JM DRUMS DEMO PERCS Instrument 2 MOOG POP 1 Instrument 3 Instrument 4 HIGH STRINGS JM CLAV Instrument 5 Instrument 6 OB-8* f) Play each sound briefly to make sure that they sound O.K. * If they dont sound O.K., see the Distorted Audio section near the front of this manual. 2. Keyboard Test (ASR-10/88 Keyboard Only) a ) Select OB-8 (Instrument*Sequence Track 6). b) Play a chromatic scale across the entire keyboard. Press each key down only until normal key travel ends. Do not press into pressure zone. Verify that no pressure effect occurs. c) Press the key into the pressure zone and verify that pressure causes a change in volume. * Failure indicates a keyboard problem. 3. Headphone Check a ) Plug headphones directly into headphone jack. b) Play a few notes to check for stereo and sound quality. * If there is a failure, check the connection to the analog jack board. 4. MIDI Test a ) Connect MIDI OUT to b) Press Command, then c ) Press the right arrow d) Press EnterDYes. The ASR Service Manual

Installing

ReDlacina ASR-I O/88 Modules

JlO J9 J8 JJ5

O.S. 54 OTTO El
J2 L-l c two screwinto heat sink7
Expansioq J u m p e r t-t

=mounting screw location

Four SIMM sockets
Figure 17 ASR- 10 Digital Board

ISECTION I

Replacing the Analog Board
R e m o v i n g 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. Remove all cables connected to the analog board. a) 53 - 6-pin cable to the power supply board. b) Jl - 34-pin ribbon cable to the digital board, c) J2 - lo-pin ribbon cable to the analog jack board, and d) 54 - 20-pin ribbon cable to the analog jack board. 4. Remove the six (6) screws (ASR-88 has 4 screws and 2 stand offs) from the analog board: a) Four (4) SEMs from the analog heatsink to keyboard bracket, b) One (1) from center support bracket, and c) One (1) from the analog bracket. Irlstalling 5. Install the six (6) screws (see 4 a-c). 6. Connect all the cables (see 3 a-d). 7. Place the bottom panel in place. 8. Power up, test the unit. 9. Install all the screws into the bottom panel.i -. ,;, , CL:.F; Jl II
.= mounting screw location Figure 18 ASR- 10 Analog Board ASR Service Manual
ReDiacinP ASR-I O/88 Modules

lsECTi0N I

Removing 1. 2. 3. 4. 5. 6. 7. 8.
Replacing the Power Supply Board
Remove all cables connected to the ASR- 10, including the power cord. Turn the unit upside-down and remove all the screws from the base and rear panel. Remove the digital board (see Section A). Remove the digital jack board (see Section F). Remove the digital board bracket: a) Remove one (1) #8 SEM screw from the rear channel, and b) Lift up on the end of the bracket where the screw was until the front end of the bracket can be removed from its hole in the keyboard bracket. Remove the two (2) screws from the line filter. Pull the line filter through its hole in the I/O bracket to the outside of the unit. Let it hang by the wires. You should now be able to reach the power supply screws. Using a scribe, disconnect cables and wires from the power supply board: a) Xl (or 52) - 7-pin cable to the digital board, b) 53 - 6-pin cable to the analog board, c) Jl - 7-pin cable to the keypad/display board, d) J4 - g-pin cable to the transformer, e) Tl and T2 - green transformer wires, f) Wires to the power switch: T5 = orange, T6 = white, and T8 = blue, and g) T7 - red wire to the line filter. 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!

Figure 21- ASR-88 Bracket locations a. The bracket that is across the ASR from front to back. This bracket has seven screws securing it to the unit, two to the front of the ASRs frame, two to the back of the ASRs frame, two to the ASRs keyboard assembly, and one that connects to the bracket that runs accross to the SCSI board. b. The analog board mounting bracket. There are three screws securing this bracket to the front of the ASR frame. c. The digital I/O board mounting bracket. There are two screws securing this bracket to the front of the ASR Frame.
ReDlacina ASR-I O/88 Modules 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. There are two screws securing this bracket to the front of the ASR frame, and one screw securing it to the keyboard assembly. 5 The bracket that the digital board heat sink mounts to. There is one screw securing this bracket to the front of the keyboard frame and one securing it to the keyboard assembly. g. The short narrow bracket that secures the keyboard assembly to the side of the unit. There are two screws securing this bracket to the keyboard assembly. 8. It is best to do this step with two people. Watch out for sharp edges on the keyboard assembly. Lift the keyboard assembly out of the unit. 9. Remove the keyboard adapter board from the old keyboard assembly, and install it on the new keyboard assembly. 10. Place the new keyboard in the unit and replace the brackets in reverse order. 11, Replace the digital board. 12. Replace the analog board. 13. Replace the base pan. 14. Test the unit.
Removing Installing 1. 2. 3. 4. 5. 6. 7. 8. 9.
Replacing the Digital Jack Board
Remove all cables connected to the ASR-10, including the power cord. Turn the unit upside-down and remove all the screws from the base and rear panel. Remove the digital board (see Section A). Remove the four (4) screws that hold the digital jack board to the I/O bracket. Disconnect JlO - 20-pin ribbon cable from the digital jack board. Insert jacks into the I/O bracket. Install the four (4) screws that hold the digital jack board to the I/O bracket. Reconnect JlO to the digital jack board, note that it is keyed. Install the digital board (see Section A).
Replacing the Analog Jack Board
Removing 1. 2. 3. 4. Remove all cables connected to the ASR-10, including the power cord. Turn the unit upside-down and remove all the screws from the base and rear panel. Remove the analog board (see Section B). Remove cables from the analog jack board: 47

Revlacina ASR Rack Modules
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 J9 on the digital board (double bend end). 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. 8. Run the cable down between the DI-10 and SCSI boards. Then turn the cable so that it runs between the SCSI and analog jack board. Bring the cable up over the cutout on the PCB Mounting Bracket to the top side of said bracket. 9. Plug the free end of the dual shielded cable onto J6 of the digital jack board located on the top side of the PCB Mounting Bracket. This connector is keyed so it will only go on one way.
Side closest to Front Panel Mylar Insulator underneath DI- 10
Underside of PCB Mounting IIBracket

run dual shielded

OEX-6sr Board

mlalog I

RCV-Xtrl
SCSI Cable to connector on rear panel
Figure 26 - Installing a DI-10 Board into an ASR-10 Rack Unit
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 3. 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). Carefully remove the two EPROMs and insert the replacement EPROMs into their respective sockets. Be sure the notch in each EPROM is facing away from the SIMM sockets. JMFORTANT! Make sure all audio cables are unplugged BEFORE turning the unit on. The first time you turn on the ASR-10 after updating the software, the unit may make a pop. 4. Check the software version by pressing the Command then Env 1. 5. Using the right or left arrow button, scroll until the display shows SOFTWARE INFORMATION. 6. Press Enter-Yes. 7. Press the up arrow button until the display show ROM=XX. The version number should be the same as that printed on the label of the newly installed EPROMs. 8. Test the unit. Replace all the screws on the bottom plate (use no more than 8 in/lbs of torque).
Replacing the Rack OEX-6sr Board

1. 2. 3. 4. 5. 6. 7. 8.

Remove all cables connected to the ASR-10 Rack, including the power cord. Remove the lid (see Section A). Remove the PCB Mounting Bracket (see Section 0). Remove the four (4) #6-32 screws from the OEX-6sr board. Pop the OEX-6sr board from the two white standoffs by squeezing the standoffs. Remove 52, lo-pin ribbon cable from the OEX-6sr board. Remove the OEX-6sr board from the unit. Reconnect the ribbon cable from the main board making sure that the striped side is on pin 1. 9. With the new OEX-6sr board tilted on a slight angle, insert the jacks into the holes in the rear panel and snap the board onto the standoffs. 10. Install the four (4) screws that hold the OEX-6sr board to the PCB Mounting Bracket. 11. Install the PCB Mounting Bracket (see Section 0). 12. Power up, test the unit, and reattach the lid (see Section A).

ReDhCinQ

ASR Rack Modules
Replacing the PCB Mounting Bracket

1. 2. 3. 4. 5.

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 Jl of the digital board. Disconnect the 34-pin ribbon cable from JlO of the digital board. Disconnect the 20-pin ribbon cable from the J7 location of the digital board. Use caution as this connector is beneath the cable going to 54 at the center of digital board. 6. Turn the unit around so that the jacks are closest to you and remove the six (6) #6-32 x 114 SEM (screw with a star washer attached) screws from the back panel of the bottom housing. 7. Turn the unit around so that the front panel is closest to you. Carefully, so that it doesnt drop, slide the PCB mounting bracket toward the front panel. 8. Tilt the front of the PCB Mounting Bracket up and disconnect the 7-pin power cable from J2 of the digital board. 9. Lift up the front end (side closest to the front panel) of the PCB Mounting Bracket to remove the keyed 6-pin power cable from 53 on the analog board. It is on the underside of the PCB Mounting Bracket in the same area and the 7-pin power cable to the digital board. 10. Now you will be able to tilt the PCB Mounting Bracket to an upright position, so that it is sitting on the jacks. It helps to lift slightly the jack end of the PCB Mounting Bracket first, then the front end. 11. Tilt the PCB Mounting Bracket forward so that the power cables disconnected in steps 8 and 9 can be reattached. Connect the 6-pin power cable to 53 on the analog board (underside of PCB Mounting Bracket). Connect the 7-pin power cable to J2 on the digital board (top of PCB Mounting Bracket). Note that these connectors are keyed. 12. Slide entire assembly toward the back of the unit. NOTE: Make sure the tabs on the power supply heat sink bracket slide into the slots on the bottom of the PCB Mounting Bracket. 13. Set the PCB Mounting Bracket flat and slide it back such that the slots on the underside of the bracket lock in and the jacks go through the holes in the back of the unit. You can check to see if the slots are locket in by trying to lift the front of the PCB Mounting Bracket. It shouldnt lift up. Slide all jacks into the holes in the rear panel. If the jacks dont align properly, partially insert a small screwdriver into the problem jack and wiggle it into its rear panel hole. 14. Install the six (6) #6-32 x 114 SEMs into the rear panel of the unit to hold the PCB Mounting Bracket in place. 15. Reconnect all cables (see Figure 20): a ) Connect the 34-pin disk drive ribbon cable to JlO of the digital board; b) Connect the display cable to Jl of the digital board; c) Connect the KPC simulator cable to J7 of the digital board. Use caution as this connector is beneath the cable going to J4 (center of board).

The terminator is either external or internal. The external terminator resembles two 50-pin SCSI connectors mounted back to back and encased in plastic. It is plugged into the SCSI connector of the device and then the SCSI cable is plugged into the terminator. The internal terminator is simply the resistor network, typically as resistor packs on the SCSI device controller circuit board. The documentation that accompanies the SCSI device usually describes the procedures required for installation and removal of terminators. The SCSI installed in the ASR-10 Rack (or the SP-3 SCSI Kit for the 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. Error Messages that may appear while you are using the ASR-10 with SCSI UNCONNECTED SCSI DEV A SCSI device that was detected by the ASR-10 at bootup is no longer connected or turned on. What to do: Check your SCSI connections. If your SCSI drive has a changeable ID number, make sure it matches the SCSI device number you have chosen in the CHANGE STORAGE DEVICE command.
INVALID LOAD DEVICE What to do:
No SCSI device with this ID was connected to the network when the ASR- 10 booted up. Use the CHANGE STORAGE DEVICE Command to verify that you are using the correct SCSI device number.
SCSI Infomation NOT AN EPS SCSI DEV The SCSI device selected is not an ASR-10 formatted storage device, and cannot be used by the ASR-10, or a non-ENSONIQ CD ROM is loaded in a connected CD ROM drive. You may choose to reformat the SCSI drive for use with the ASR-10. Use caution, as this will erase all previously saved data on the SCSI drive. The CD will work if it is the proper Roland or Akai format.

What to do:

DISK HAS BEEN CHANGED The disk (or cartridge) has been ejected from the drive since the last time the drive was accessed by the ASR-10. Reinsert the disk or cartridge, press Load, then Instrument, and What to do: continue.