SELF-TEST MODE

T.O. 31W2-2GSC24-2

TM 11-5805-688-14-1

NAVELEX 0967-LP-545-3010

NOTE

MULTIPLEXER OUT OF TOL indicator

Hazardous voltages are present at the power

may be lighted after step 14 is per-

supply electrical connectors.

Turn off

formed. When indicator is lighted, wait

operating power and disconnect power cord

approx- imately 40 seconds and repeat

before

attempting

power

supply

step 14.

replacement; otherwise, personnel death or

injury may result.

14. Upon release of DISPLAY RESET switch,

observe that all front panel error displays remain out and

4. Set POWER CONTROL switch to OFF.

POWER CON TROL ON indicator is lighted.

5. Disconnect multiplexer set power cord from its

15. Perform a self-test of the multiplexer set

source outlet.

diagnostic circuits as prescribed in paragraph 6-32.

6. Replace power supply assembly as prescribed in

6-11. SELF-TEST MODE. A manually initiated self-test

paragraph 6-23.

mode is provided for detection and isolation of faults

occurring in the diagnostic circuits on the multiplexer set

7. Connect multiplexer set power cord to its source

printed circuit cards. Faults detected during self-test are

outlet.

displayed by front panel error indicators. In the self-test

mode,

the

MULTIPLEXER

CARD

and

8 Set POWER CONTROL switch to ON.

DEMULTIPLEXER CARD indicators are normally lighted

and the number 00 appears in the FAULT LOCATION

9. Momentarily press DISPLAY RE-SET switch.

display.

(Refer to paragraph 6-32 for self-testing

procedures.) An abnormal display is indicative of a card

10. Upon release of DISPLAY RESET switch,

with faulty diagnostic circuits; perform corrective action

observe that all front panel error displays remain out and

as follows:

POWER CON- TROL ON indicator is lighted.

1. With SELF TEST switch in on (up) position,

11. If the card number appearing in the FAULT

observe which error indicator (MULTIPLEXER CARD or

LOCATION display is 15 or less, replace card as

DEMULTI- PLEXER CARD) is not lighted, and the card

prescribed in paragraph 6-22. If the displayed card

number that appears in the FAULT LOCATION display.

number is 16 or greater, set POWER CONTROL switch

to OFF, and then replace card as prescribed in

NOTE

paragraph 6-22.

The SELF TEST switch must remain in the

12. If POWER CONTROL switch was previously set

on (up) position for approximately 15

to OFF, set switch to ON.

seconds before final error information is

displayed.

13. Momentarily press DISPLAY RE-SET switch.

6-4