Section VI, FUNCTIONING OF CONVERTER-MULTIPLIER ASSEMBLY CV-3633/GRC-144(V) CIRCUITS

TM 11-5820-695-35

Section VI, FUNCTIONING OF CONVERTER-MULTIPLIER ASSEMBLY CV-3633/GRC-144(V) CIRCUITS

connector plug P2 pins A6, A8 and A5, and rfi filters

2-81.

General

3ATFLl through 3A7FL3. Filters, rfi 3A7FLl, 3A7FL2

and 3A7FL3 prevent unwanted interference of

This section covers the functioning of circuits used in

electromagnetic radiation of radio frequency from

Converter-Multiplier Assembly CV-3633/GRC-144(V),

transformer 3A7T1 and amplifier-multiplier 3A5 heater

Unit 3. The coverage is not presented in sequential

circuits from entering into the operating circuits.

reference designation order but in the functional

operating sequence and is at the schematic diagram

level. Circuit functioning and schematic diagrams are

a. Transformer 3A7T1 is a step down transformer

not provided for the nonrepairable assemblies (i.e. BP

with a single primary and four secondary windings.

filters 3A3 and 3A4, circulator 3HY1, etc). Circuit

Each secondary winding is connected to power supply

descriptions for cabinet mounted components such as rfi

3A6 rectifying and control circuits (refer to paragraph 2-

filters are covered in this section.

All electrical

84 for circuit descriptions). The RMS voltage output of

equipment cabinet 3A7 mounted circuits and all

each transformer secondary winding is as follows:

interconnections in the CV-3633/GRC-144(V) are shown

in figure 5-98 and subassembly schematic diagrams are

Winding

Voltage

shown in figures 5-99 through 5-106.

3-4

95V RMS

2-82.

Chassis, Electrical Equipment 3A7

5-7 (CT)

7-2V RMS

Chassis, Electrical Equipment 3A7 contains all

necessary wiring that interconnect components of an

8-9

14.7V RMS

operable AN/CRC-144(V)4 radio set together. Primary

115-120 Vdc power (fig. 2-32) is applied and returned to

10-11

14.7V RMS

source through connector J1 at pins A, B and C. The

primary power is then distributed through terminal

b. Direct current (dc) power (fig. 2-33) is distributed

boards to Receiver, Radio R-1467(P)A/QCC-144 by

from power supply 3A6 through terminal boards to the

cable assembly connector P1 pins A, B and C and to the

CV-3633/GRC-144(V) amplifier-multiplier 3A5, alarm

status panel 3A8 by cable assembly connector P2, pins

monitor 3Al, frequency electronic converter 3A2, status

A1, A3 and A4. The status panel contains POWER

panel 3A8 and air flow sensor circuits consisting of

ON/OFF switch 3A8S1 and the necessary fuses to

thermostat 3A7S1 and air flow sensor 3A7S2. The

protect the CV-3633/GRC-144(V) circuits and is

power supply 3A6 +100 Vdc is applied to amplifier-

discussed in paragraph 2-83. When the status panel

multiplier 3A5 current regulator 3ASA8 circuits through

POWER ON/OFF switch is in the ON position, primary

connector XA5 pins 3 and 4. The power supply 3A6 +28

power is applied to power transformer 3A7T1 and

Vdc is applied to the

amplifier-multiplier 3A5 heater circuits consisting of

thermostat 3A5S1 and heater 3A5HR1 through

Change 6 2-126