Elka ek22 schematics

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elka ek22 schematics

Extracted text from elka ek22 schematics (Ocr-read)


Page 1

Pref ass/0M

E film]

EK 22

PROGRAMMABLE
SYNTHESIZER

schematic diagrams

Page 2

PLEASE NOTE

EK22/44 - EM22/44 MODIFICATIONS

IN ORDER TO AVOID:
A) DISMEMORIZATION OF RAM AT THE MOMENT OF SWITCHING ON OF

AN INSTRUMENT CONNECTED WITH OTHERS DUE TO PARASITIC
CURRENTS

B) FUSE'S BREAK 0F + 5n

WE SUGGEST YOU TO CONNECT WITH WIRE 0,50 OR 0,75 MASS TO
EARTH ANCHORAGE.

BESIDES, TO AVOID THE CASUAL READING OF -œCONSTRUCTOR'S CODE"
ON EPROM OF BOARD 1708, WHICH COULD PROVOKE THE BAD
FUNCTIONING OF DCG l AND/OR 2, CONNECT A DIODE WITH SIGNAL
EA 130 OR EQUIVALENT BETWEEN PIN 24 AND PIN 28 (CATHODE ON
28) 0F IC 1.