1834-065-B-10-14
15
NC
NO
ON
CLK
SEN
SPK
VOL
FEED
BACK
RS 232
MIC
VOL
OFF
RING
321
321
321
MASTER
CODE
KEYPAD
16AC16ACBAT1NO1NC1C2RY2CAZIMC
5VDCIMDSPKRCOMMICPSWCGNDPHONE
CONTRAST
1.5 Memory Chip Replacement
The telephone entry system is shipped with the memory chips already installed in the unit.
However, if you need to
replace the memory chips (to match an older unit, for example), follow the instructions below. See 3.1.3 Memory Chip Identifi-
cation for information about the memory chips in the telephone entry system.
DO NOT install the memory chips with power to the telephone entry system turned ON. Attempting to install the memory
chips with power on will irrevocably damage the chips. Memory chips are a static sensitive component. Discharge any static
electricity from your hands by touching a proper ground device before touching the control board. Handle the memory chips
with care, the pins bend easily.
DO NOT install the memory chips UPSIDE DOWN. this will cause permanent damage to the chips. Be sure that the memory
chips are seated correctly in the sockets.
CAUTION
1834 Circuit Board Memory Chip Locations
Dimple MUST be at
the top of the chip!
Dimple MUST be at
the top of the chip!
Locked
Release
Press Fit
Be Careful!
Power MUST be OFF to the Circuit Board!!
Discharge any static electricity from your hands by touching a proper ground device before installing chips!
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