Assembly Instructions Chapter 4

LX Series Power Amplifier Assembly Chapter 4, Circuit Descriptions
LX Series, Rev. 0 4-5
and connected to the Reflected Power
Shutdown circuit at CR28. The low shuts
off Q14 causing pin 3 to go high that is
connected to the inverter U15C. The
output of U15C goes low producing a
Reflected Power Fault that is connected
to an output of the board, the Fault Alert
circuit and also shuts down Amplifier #1.
Gain of the power measurements is
completed through software. Only the
Aural Null and Offset Null need to be
done through front panel pots.
4.2 Power Supply Assembly (1302863;
Appendix B)
The Power Supply Assembly contains (A1)
a +32V/2000W switching power supply
(1301504) and (A2) a ±12V/40W
switching power supply (1303242). The
+32VDC connects through J1 (+32VDC)
and J2 (RTN) to the rest of the amplifier
assembly. The +/-12VDC outputs, the
+32VDC control lines and the 220VAC
connect to the assembly through Jack J3.
Both power supplies contain no customer
adjustments.
This completes the description of the Power
Amplifier Module Assembly and the Power
Supply Assembly.