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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The following flow charts can help you diagnose units which appear dead no display. Disconnect ensoni transformer cables to the power supply, line filter, and power switch. Using The Patch Select Buttons Re-install the Power Supply screws. 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.

If the unit has a recessed System Expander Port, there will be a gap between the module ears ensonqi the case.

Power Supply Measurements Re-install the knobs on the Data Entry and Volume sliders. In this case, you should test the Power Supply unloaded before proceeding. Leave these two mounting— screws out when: It is important, therefore, to transfer the metal plate from the old drive to the replacement drive.


Before installing the new circuit board, make sure the mylar insulator is in place.

Install the new Line Filter from outside the case using the two screws, star washers and nuts. With the power off, face the front of the unit, then: Insert the replacement Power Supply Board. Discard the plastic filler. Place the unit upside down on a soft surface and remove the four 4 screws that attach the Wheel Assembly to the case. Remove the control panel see Section B.

Reconnect the pin ribbon cable to the KPC board before sliding the new assembly into place.


majual Discard the large portion of the top housing. Sometimes it created two Disk l’s and a Disk 2 for a 3-disk sound. This will prevent a faulty option from complicating your troubleshooting. Due to the complexity of the modules involved, it is often difficult to determine which module is at fault when a communications problem occurs. The communications path is shown in Figure 1.

Ensoniq EPS PLUS Manuals

Sam Mims has been creating sounds for Ensoniq keyboards for over 20 years, and was a beta tester and factory ensonniq programmer for many of those keyboards. Install the screw, and tighten it only until the sub-assembly being attached is snug against the case. Load In Sounds Immediately place the defective drive into the anti-static bag that the new drive came in.


If the voltage is not within this range or the AC ripple is greater than 50mV, replace the power enskniq. Never use acid-core solder or solder flux for electronics work.

This function had been disabled in version 2. Connect the Keyboard, Disk Servicce and main harness cables. This manual is a large Meg. Insert the new Keyboard rear first into the unit at the front of the Keyboard cavity.

If no problem Is found, check the voltages on the power supply at J3. Manuals Syntaur is the exclusive producer and licensed distributor of Ensoniq’s manuals; some are available in printed form, others are pdf files.

Note that there are star washers on the inside only.