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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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Select each instrument one at a time and play it Listen for ESP effects problems, sound clarity, noise etc. The ripple must be less than 50mv. Remove the four 4 screws that fasten the manuall panel and raise the panel with a 2. Remove the one 1 machine screw from the top 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 voltages are not within this range, replace the power supply. If no problem is found, check the voltages on the power supply at J2. Press one key and you should hear 3 notes play in succession.

Ensoniq EPS 16+ Service Manual

Install the four 4 self-tapping screws on the bottom of the unit closest to the control panel. If M readings are off, then it is most likely that there is a problem with the Main Board. Note that the OEX-8 outputs are not designed to drive headphones directly and should be plugged into a suitable line-level pre-amp such as a mixing board. Go to Incorrect Power Supply Voltages flow chart, p.

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Instead, the display will read: The EPS should play normally, however the output should be noticeably louder than before at the same volume setting. Make sure the Disk Drive ribbon cable is not caught under the Keyboard standoffs.

Reinstall the knobs on the Data Entry and Volume sliders.

Ensoniq Corporation – EPS Plus – Service Manual

Disconnect one end of rnsoniq MIDI cable d. Attach the mounting brackets to the control panel trying to use the same holes. Gently slide the Keyboard srevice the rear of the unit, lowering the front of the Keyboard as needed to clear the control panel mounting tabs.

The modules communicate with each other using serial communication ports Whenever a key is played on the Keyboard, for example, the Keyboard microprocessor transmits this information to the microprocessor on the Main Board.

Analog Test Page a. Install die two 2 self tapping screws on either side of the unit 3.

ENSONIQ EPS Service Manual

You must remove this sheet before powering on manula unit. Attach the board to the chassis using the correct number and placement of screws.

Press each key down only until normal key travel ends. Reconnect the pin ribbon cable to the KPC board before sliding the new assembly into place. Power up, test the unit, and re-attach the lid see Section A.

Play back the sample and listen critically. When replacing any of the self-tapping screws, it is possible to over-tighten the screws and strip a hole in the case, making setvice necessary to replace the case or control panel.

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Reconnect the audio cables. Re-attach the cables to the enaoniq supply, line filter, and power switch. Attach the new main board power cable to the power supply at J4 and to the main board at J1 0.

Full text of “Ensoniq EPS 16+ Service Manual”

Hum or buzz in audio output; EPS crashes randomly; or problems develop after inserting a memory expander. The following flow charts can help you diagnose units which appear dead no display.

With the front of the unit toward you, the four-pin cable should be attached with the black wire on srrvice left and the five-pin cable should be attached with the purple wire to the left. Remove the Power Supply board. Insert the new resistors into the appropriate lead holes.

If no problem Is found, check the voltages on the power supply at J3. Instructional Videos Learn the ins and outs of your keyboard quickly with these instructional VHS video tapes produced by Ensoniq. Remove the two 2 screws and nuts that secure the Power Supply to the case note that there are star washers on each screw. Re-attach the Wheel Assembly to the case using the four screws.

Version on a floppy disk: Carefully slide the Disk Drive out of the wheel assembly.