Continuity and Short Circuit Tests for Cable Assembly, Special Purpose, Electrical CX-4655/GRC

TM 11-5820-498-35

NOTE:

TM5020-498-35-6

CONNECTORS VIEWED FROM PIN SIDE.

Figure 3-5. Cable Assembly, Special Purpose, Electrical CX-4655/GRC, wiring diagram.

3-7.

Continuity and Short Circuit Tests for

switch settings and resistance indications. Refer to

c below for the resistance indications at all switch

Cable Assembly, Special Purpose, Elec-

positions of the ANT. FREQ. CONTROL switch.

trical CX-4655/GRC

Use Multimeter ME-26(*)/U as an ohmmeter to

b. Voltage Measurements. To make voltage

c h e c k for continuity and short circuits in

measurements, apply a 25.5-volt dc power source

CX-4655/GRC wires. Refer to figure 35 for the

(or 25.2 volts from the PP-2953(*)/U)to POWER

wiring diagram.

INPUT connector J3 (para 3-4). Refer to figure

3-6 for the required AM2060(*)/GRC switch set-

3-3. AM-2060(*)/GRC, Voltage and

tings and voltage indications. Refer to c below for

Resistance Measurements at Connectors

the voltage indications at all positions of the ANT

J2, J3, and J4

FREQ. CONTROL switch.

To isolate trouble to a defective part in the

c. ANTENNA CONTROL Connector J4. Voltage

AM-2060(*)/GRC, other than on the plug-in as-

(b above) and resistance (a above) indications at

sembly, use the techniques given in a through c

connector J4 for all positions of ANT. FRE-

below. Use the schematic diagram (fig. 4-9) to

QUENCY CONTROL switch are provided in the

trace and isolate the defective part.

following chart. The SPKR switch is set to OFF;

a. Resistance Measurements Before making re-

the PWR switch is set to ON. The ME-26(*)/U

sistance measurements, remove all power and

cable connections to the AM-2060()/GRC. Refer

measurements are made between J4 pins and

to figure 3-6 for the required AM-2060(*)/GRC

ground.

3-8