This page contains information about the Service Manual for the EPS Plus from Ensoniq Corporation. Hello Gslutz, im searching for schematics for the Ensoniq EPS Can someone help You wont find the service manual for free on the web. 21 EPS—16 PLUS Service Manual Table of Contents — 1 Table of Contents . For more information about the Poly-Key Keyboard assembly, see ENSONIQ.

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When replacing a main board, you should replace it with the same version that is in the unit. If no problem is found, check the voltages on the power supply at J3. Discard the large portion of the top housing. The AC ripple on this pin should be less than 50mV If the voltage is not within this range or the AC ripple is ensonjq than 50mV, replace the power supply.

Full text of “Ensoniq: ensoniq eps eps m sm”

When using the Communication Test Board, keep in mind that it is sensitive to static discharge. Install the screw, and tighten it only until the sub-assembly being attached is snug against the case. Remove the two 2 screws and nuts that secure the Filter to the case. Remove the four 4 self-tapping screws from the top of the unit closest to the control panel. Carefully reconnect the four cables, paying particular attention to the alignment of pins and connectors. Don’t have an account?

Continue to press the key into the pressure zone and verify that pressure causes vibrato. Power up, test the unit, and reattach the lid see below. If the communications problem persists, you know the Keyboard assembly is not at fault If communication is restarted, however, the Keyboard assembly is at fault.

If you must replace a Main Board with a 1 Main Board, three cables must be replaced. Secure the D-type connector to the bottom housing by tightening the two threaded manuzl studs on the connector until they are snug.


Replacing The Rack Main Board We just wanted to let you know that we have switched to a higher retention force connector on our transformers. Remove the one 1 machine screw from the bottom of the unit located about 1″ back from the control panel this screw goes through the disk drive mounting bracket inside the unit.

Mono Output And Headphone Test Discard the cartridge cover. Press Edit, then double-click on the System button to see the amount of free memory.

Rather than diagnose and exchange individual components, you will replace complete modules.

Rear Panel Connections mnaual After about two weeks of continuous Bum-in Testing, the “counter” will reach its limit, and the disk will not boot the system properly. Monday through Friday 9: Install the four 4 machine screws and star washers into each side of the unit the ones that could attach the mounting ears.

The communications path is shown in Figure 2.

ENSONIQ EPS Musician’s Manual

The standoffs are intended only for support and should not be stuck down to the case. Power Supply Fuses To reduce the occurrence of fuse failure when a memory expander is installed, fuses F3 and F4 were changed from 3.

Return the unit to an upright position and raise die control panel.

The Midi Connection Power – Grounding Information Reconnect the ribbon cable from the main board making sure that the striped side is on pin 1. Remove the five 5 self -tapping screws from the back of the unit. Remove the lid see section A. It also could be caused by a problem with the keyboard: Verify the the proper Line Voltage is present.

Ensoniq EPS PLUS Manuals

In Self-test mode, the Display remains blank until you press the buttons on the control panel. Reinstall the knobs on the Data Entry and Volume sliders. Resample With Effects Change Sequence Length ID Description ID Description 16 poly or mono pressure events sent to VC trapv instruction overflow error 20 unknown button event privilege violation 48 parameter error trace 49 layer error line emulator 80 bad buffer to MIDI spurious interrupt bus error unused vector odd address error load all data error from MIDI or card divide by zero keyup playback error illegal instruction out of SDBs error ehk instruction register out of bounds Main Board Problems The following unexpected event messages could be servuce by a problem on the Main Board: Knobyou must scroll right so that the value is underlined.


When installing the keyboard assembly back into the EPS PLUS, be sure that the keyboard assembly cable is flat under the keyboard assembly and that the ferrite bead is not trapped on top of the main board. Always wait until the display shows waiting before starting the sending device. When replacing any of the self-tapping screws, it is possible to over-tighten the screws and strip a hole in the case, making it necessary to replace the ensooniq or control panel.

Insert the new Keyboard rear first into the unit at the front of the Keyboard cavity. Before installing the new circuit board, make sure the mylar insulator is in place.

Ensoniq EPS 16+ Service Manual

If the formatting attempt maanual, it is likely that the disk itself is faulty. Do not pull on the wires! Remove the Disk Drive and place it into the new assembly as described in Section H. If no problem is found, check the voltages on the power supply at J2.