Battery Voltage Distribution, Local Control Unit C-2329(*)/GRA-39

TM 11-5820-477-30

1-17. Battery Voltage Distribution, Local Control Unit C-2329(*)/GRA-39

(figures FO-5 through FO-8)

NOTE

The following discussion applies to all models of Control, Radio Set C-2329(*)/GRA-39,

except where noted.

In the A-, B- and C- models, the call lamp circuit is connected directly to the battery

supply side of switch S101. (Refer to FO-6, FO-7 and FO-8, respectively.)

The distribution of the battery voltage depends on the position of the TEL-REMOTE-RADIO switch. The

application for each function is traced in the following paragraphs a. through c. POWER switch S101 is

considered to be at ON throughout this discussion.

NOTE

The application of the battery voltage is traced to a pin of connector P102. The

application from these pins is discussed in paragraph 1-16.

a. REMOTE Position. With the TEL-REMOTE-RADIO switch in REMOTE position, battery voltage is applied

through switch S102, section B rear (contacts 12 and 10) to terminal 1 of relay K101. Battery voltage is also

applied to the resonant relay amplifier through contacts 8 and 6 of S102, section B rear to P102 (pin F) and,

through filter FL103, to P102, pin D.

b. TEL Position. With the TEL-REMOTE-RADIO switch in TEL position, battery voltage is applied to the

preamplifier through switch S102, section B rear (contacts 8 and 5) to PI 02, pin J.

c. RADIO Position. With the TEL-REMOTE-RADIO switch in RADIO position, battery voltage is applied

through switch S102, section B rear (contacts 12 and 11) to terminal 1 of relay K101.

1-18