Section VII. DC VOLTAGE REGULATOR AND DATA OUTPUT PRINTED CIRCUIT

TM 11-6130-385-34

Section

VII.

VOLTAGE

REGULATOR

AND

DATA

OUTPUT

PRINTED

CIRCUIT

BOARD

3-29. General

and Zener diodes (CR402, CR405) which supply + 5V

low power and logic circuitry. The + 2.5v is the basic

The Dc Voltage Regulator and Data Output board

reference

for

logic

circuit

decisions

and

also provides a high and low voltage detector circuit,

regulator.

a negative bias source, and a 12-volt booster. Each

network is illustrated and detailed in this section.

3-32. High and Low Voltage Detector Circuit

(fig. 3-23)

3-30. 8-Volt and 12-Volt Regulator Circuit

(fig. 3-21)

The high and low voltage detector responds to levels

above 33v (at U401-8) and below 8V (at

U401-7).

The 8-volt and 12-volt regulator receives 18-32 vdc

High or low input voltage activates the kill control

f r o m the capacitor bank supply and provides a

which disables output via logic circuitry.

regulated +8 - to 12-volt nominal output as required

by the various other circuits of the unit. Also see

3-33. Negative Bias Circuit

figure FO-1.

(fig. 3-24)

3-31. Voltage Regulator Circuits, 2.5 and 5.0

The input to the negative bias circuit is fed from the

(fig. 3-22)

switching modulator. Negative bias is supplied to

the modulator circuits on printed circuit boards A2

The

2.5-

and

.0-voltage

regulators

are

emitter

and A3 by the -- 3 .4v regulator.

follower types composed of transistors (Q405, Q406)

3-43