Section Il. OPERATION UNDER USUAL CONDITIONS

TM 9-4931-378-13&P

Section Il. OPERATION UNDER USUAL CONDITIONS

P r o c e d u r e . Perform Before

Set TS MON switch S11 (52) to each of the fol-

2-5. Preliminary Starting

lowing positions and read the specified voltages:

Operation (B) Preventive Maintenance Checks and Services

(See table 2-2), then proceed as follows:

DVM Reading (Volts)

S11 Position

Set DATA MODE CONTROL switch S1 (4, figure

2-1) to CONT.

115VAC

108 to 122 Vac

b. Set the following switches to the off (down) posi-

28 VDC

24 to 32 Vdc

tion:

+10V

9.985 to 10.005 Vdc

SELF TEST S5 (11)

CPU TEST S2 (5)

-10V

-9.985 to -10.005 Vdc

PANEL LIGHTS

LAI FLR S3 (7)

4.90 to 5.10 Vdc

RDR ALT RELBL S4 (9)

519 (37)

REF OSC

6.87 to 7.27 Vac Rms

ADS FLR S20 (33)

Set circuit breakers CBI (47) and CB2 (46) to

Connect positive DVM lead to TP11 (49) and

OFF.

negative DVM lead to TP12 (43).

d. Position of rotary switches and resolvers is irrele-

Set POWER TEST switch S12 (53) to each of the

vant.

following positions and read the specified voltagas:

2.6 Initial Adjustments. No initial adjustments of the test

DVM Reading (Volts)

S12 Position

set are needed before operation unless otherwise indicated

EPU 28V

24 to 32 Vdc

by apparent physical damage. In such an event, refer to

14.80 to 15.20 Vdc

LAI +15V

Chapter 5.

-14.80 to -15.20 Vdc

L A I -15V

2-7. Operating Procedure. To place the test set in opera-

tion perform the following steps:

Disconnect DVM.

Set up test set as illustrated in figure 2-2.

k. The test set is now ready for operation.

Procedures for operating the test set are contained

b. Set the 115 VAC circuit breaker CB1 (47, figure

2-1) ON and check that 115 VAC indicator lamp

in TM 9-1270-219-13.

(48) illuminates.

c. Set the 28 VDC circuit breaker CB2 (46) ON and

2-8. Procedure for Placing Equipment in Standby Condi-

check that 28 VDC indicator lamp (45) illumi-

tion. To place test set in standby condition, set circuit

nates.

breakers CBI (47, figure 2-1) and CB2 (46) to OFF.

d. Set the SELF TEST switch S5 (11) up and check

that all indicator lamps on the front panel of the

t e s t set illuminate. DATA WORD display (23)

2-9. Procedure For Shutdown. To shut down test set, set

shall display 888.

Return S5 (11) to the off (down) position.

both circuit breakers CB1 (47, figure 2-1) and CB2 (46) to

f. Connect positive DVM lead to TP9 (50) and nega-

OFF. Next, disconnect power cable assemblies W1 and W2

from bench power and then from the test set.

tive DVM lead to TP10 (51).

2-10