Table 7-3. Troubleshooting Intercommunication Switchboard SB-2601/G

TM 32-5895-227-14&P

Table 7-3. Troubleshooting Intercommunication Switchboard SB-2601/G - Continued

Item

Trouble symptom

Probable trouble

Corrective action

number

Defective corresponding relay KO

Refer to FO-6. Transfer function of any

Inability to transfer

through K9

one station; check for presence of 20

any one of the

Vdc at relay coils KO through K9. If 20

following groups of

Vdc is present and relay is not

stations on a specific

energized, relay is defective. Remove

channel:

and replace relay.

STATIONS: 1- 9

10-19

20-29

30-39

40-49

50-59

60-69

70-79

80-89

90-99

indicated. The rear view of the RICS shows the proper

7-9 TROUBLESHOOTING SB-2602/G.

jack location for intercommunication channels I through

a. General. Perform the procedures indicated

10 and transfer control and special stations 1 through 6

below for sectionalizing, localizing, and isolating trouble

connections.

to a particular circuit in the Radio Intercept Control

(2) The wiring diagram for the RICS is

Switchboard (RICS) SB-2602/G.

shown in FO-7. This diagram indicates a complete

b. Diagrams.

electrical means of performing maintenance on this unit.

(1) The location diagram for the RICS is

It consists of power supplies, blinker circuit, audio

shown in figure 7-5. There are ten transfer channels

volume compression unit, connectors, switches, relays,

and six special stations which indicate the corresponding

and associated wiring.

switches and relays. Location of power supplies No. 1

c. Troubleshooting Chart. Table 7-4 lists the

and No. 2 components, blinker board, and AMP 1

trouble symptoms, the probable troubles, and the

through AMP 4 boards are

corrective actions to be taken.

7-10