Simplex 2120 - M-2120-ET Initiating Wiring Diagrams

REMOVE POWER TO THE ET AS
FOLLOWS:
l DISCONNECT
BATTERIES FIRST.
. DISCONNECT AC
LAST.
LOCATE THE RECTIFIER ON
THE HEAT SINK ASSEMBLY
(DIRECTLY BEHIND THE POWER
SUPPLY BOARD). REMOVE lT
AND CHECK TO SEE IF ll IS
dOOD.
I
‘YES
t
DISCONNECT THE LARGE
CAPAClTORS (PART OF THE
REPLAC:E THE
HEAT SINK ASSEMBLY) AND
RECTIFIER
CHECK THEM FOR SHORTS
CAPAClTORS
REPLACE THE
FAILED CAPAClTOR
1
V
REPLACE THE TRANSFORMER
(ALSO PART OF THE HEAT
SINK ASSEMBLY)
POWER/BATTERY FAIL Trouble
FIGURE 4D
FOLLOW FIELD
CHELON SUPPOR
PROCEDURE IN
GENERAL SERVICE
LElTER #14-83
22
firealarmresources.com