Table 5-4. Troubleshooting

TM 9-4931-378-13&P

(47 ) Carefully adjust

resolver B2 (2) for

Voltage recorded in step (37) shall be

(39)

maximum positive dc voltage. Record

within 0.136 Vdc of the voltage recorded

voltage.

in step {29) multiplied by 0.440. (See ta-

(48) Dual-speed drive shall indicate between

ble 5-4, 74.)

359.9 and 0.0O. (See table 5-4, 75.)

(40) Set AADS TEST switch S16 (30) to SIN

(49) Voltage recorded in step (47) shall be

within 0.136 Vdc of the voltage recorded

(41) Set

resolver B2 (2) to 90.0.

in step (29) multiplied by 0.440. (See

resolver B2 (2) for

(42) Carefully adjust

table 5-4, 74. )

maximum positive dc voltage. Record

Set circuit breakers CB1 (47) and CB2

(50)

voltage. (See table 5-4, 73 and 76.)

(46) to OFF.

(43) Dual-speed drive shall indicate between

(51)

Disconnect power cables W1 and W2

89.9 and 90.1o. (See table 5-4, 75.)

from facility power.

Voltage recorded in step (42) shall be

(44)

Disconnect power cables from test set.

(52)

within 0.136 Vdc of the voltage recorded

Remove test cable.

(53)

in step (29) multiplied by 0.440. (See ta-

ble 5-4, 74.)

5.13. Troubleshooting. Table 5-4 lists corrective actions in

Set AADS TEST switch S16 (30) to COS

checkout procedure order. A malfunction is identified, a

(45)

corrective action is stated and direction is given for disposi-

resolver B2 (2) to 0.0O.

Set

tion.

(46)

Table 5-4. Troubleshooting

Malfunction

Test or Inspection

Corrective Action

NOTE

This table lists malfunctions in the order

they are met in the checkout procedure.

Refer to Chapter 6 Section II for com-

ponent removal and Section V for instal-

lation. If any malfunction continues after

all listed corrective actions have been

taken, send the test set to higher mainte-

nance for repair.

Failure isolation shop set will help identify

failed circuit card assemblies.

1. OPEN CIRCUIT BETWEEN TP4 AND J4-59 WITH S2 SET TO CPU TEST.

Step 1. Check witch S2.

Replace switch S2.

Step 2. Perform continuity check of wiring to S2. (See paragraph 5-14 and figure F0-1.)

Repair wiring as necessary

2. SHORT CIRCUIT BETWEEN TP4 AND J4-59 WITH S2 SET TO OFF (DOWN) POSITION.

Step 1. Check witch S2.

Replace switch S2.

3. OPEN CIRCUIT BETWEEN TP4 AND J4-60 WITH S3 SET TO LAI FLR,

Step 1. Check switch S3.

Replace switch S3.

Step 2. Perform continuity check of wiring to S3, (See paragraph 5-14 and figure FO-1.)

Repair wiring as necessary.

5-23

Change 1