After Sales
Technical Documentation
Handset HSU–1
Page – 7
Original 50/96
Voltage Regulator
Supply voltage to DG–1 module is fed via connector X1 pin 1. Voltage is
regulated with regulator N1 ( LP2951 ACM ). Capacitors C4 and C1 are
used to improve filtering. Bias voltage for Mic and Ear signals and amplifi-
ers is made byamplifier N2C (TL074ID). Regulated voltage 5 volts is de-
vided by resistors R1 and R2 and the amplified by N2C. Capacitor C18
filters regulated voltage.
Block Diagram
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