Elka ek22 schematics
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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 CONSTRUCTOR'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.