DoorKing 1838 - Memory Chip Replacement

8
1838-065 Issued 3-19
Version D
1.3 Memory Chip Replacement
The 1838 access controller is shipped with the memory chip already installed in the unit. However, if you need to
replace the memory chip in the NEW 1838 access controller or replace the memory chips in an OLDER 1838, follow the
instructions below.
1838 Circuit Board
NC
NO
NO
RING
NC C
ON
SPK VOL
FEED BACK
RS 232
ELEVATOR
12345 67891011121314
1 2 3
MIC VOL
OFF
KEYPAD
321
321
321
MASTER CODE
16AC16ACBAT1NO1NC1C2RY2CAZIMC5VDCIMDSPKRCOMMICPSWCGNDPHONE
TONE ON
TONE OFF
Old Chip
Release
CAUTION
DO NOT install the memory chip with power to the telephone entry system turned ON. Attempting to install the memory
chip with power on will irrevocably damage the chip. The memory chip is 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 chip
with care, the pins can bend easily.
DO NOT install the memory chip UPSIDE-DOWN (Arrow MUST point in direction shown). Installing chip upside-down will
cause permanent damage to the chip.
Remove OLD memory
chip and discard it
Chip Holder
Locked
Chip Holder
ACT
NEW
Note: Be sure that the
memory chip is seated
correctly in the chip holder.
ACT LED Note: LED will flash
when 1838 is programming or
accessing memory chip data.
Install NEW memory chip
P/N 1830-404
(DO NOT use P/N 1830-403)
Arrow MUST point
in direction shown!