Service manual

1-18 June 21,2004
GENERAL NP88 FLEX
Theory of Operation
General Circuit Description
The following information describes the general theory of operation for the 352
pager. Refer to F igure 1-5 for a functional block diagram.
Power
Operating power for both the receiver and t he decoder boards is obtained from the
battery. On the receiver board, a 1-volt regulator supplies the RF circuitry with
power. The regulator is turned on and off by t he decoder via the control lines. On
thedecoderboard, thesupportIC receivesitspowerfrom thebatteryand generates
the operating voltage supplied to the microcomputer.
Figure 1-5. Functional Block Diagram