Pub. 42004-645L2C
Model 723-801 SmartSeries
®
Remote Subset Amplifier
Page: 5 of 15
d:\standard ioms - current release\42004 instr. manuals\42004-645l2c.doc
01/04
Block Diagram
Plug
P1
on the back of the Base-24 PCBA plugs into a socket in an enclosure connected to the system
cable, picking up the Page/Party
®
lines and ac power. Connector
J6
on the Base-24 PCBA connects ac
power to the Bias Power Supply PCBA and re5 V dc and +/-15 V dc in return.
The Base-24 PCBA uses the bias supplies and also passes them (as well as control, monitoring, and line
signals) to the FSK Modem and Handset Amplifier PCBAs via
J1
, a 24-pin stacking connector.
Connector
J2
on the Base-24 PCBA connects the speaker transformer for the station’s speaker, and
J3
connects optional external devices.
The Handset Amplifier PCBA connects to the handset and the hookswitch via spade terminal connectors
E1
to
E7
.
Figure 3. Remote Subset Amplifier Block Diagram
