Pub. 42004-610L2A
Model 751-801 SmartSeries
®
Speaker Amplifier
Page: 3 of 12
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-610l2a.doc
03/04
Block Diagram
Refer to Figure 3. Plug
P1
on the back of the Base-16 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-
16 PCBA connects ac power to the Bias Power Supply PCBA and re5 V dc and +/-15 V dc in
return.
The Base-16 PCBA uses the bias supplies and also passes them (as well as control, monitoring, and line
signals) to the FSK Modem via
J1
, a 24-pin stacking connector. Connector
J2
on the Base-16 PCBA
connects the speaker transformer for the station’s speaker, and
J3
connects optional external devices.
Figure 3. Block Diagram
Interfaces
The assembly interfaces to the system cable, an external loudspeaker, and auxiliary devices via
P1
, a
16-pin connector. All connections to the system cable are made by qualified installation technicians
during system installation. Direct questions about these connections to the GAI-Tronics Field Service
Department. Other connectors on the Base-16 PCBA provide quick connect/disconnect of subassemblies.
Connector
J3
on the side of the Base-16 PCBA connects optional devices such as the Party Line EOL
Module or the SmartSeries
®
Station RTU installed in special enclosures.
