Table 6-4. Dc Resistance of Transformers

C1, TM 11-6625-646-15

Table 6-4. Dc Resistance of Transformers

Reference

Dc resistance

designation

Part number

Wire color or terminal number

In ohms (10%)

T301

DO-T23

Yellow to green ................................ ...........

100

T401

Brown to blue ................................ ..............

830

T603

T604

T402

DO-T25

Yellow to green ................................ ...........

125

T601

Brown to red................................ ................

750

T602

DO-T36

Brown to blue ................................ ..............

876

T605

Yellow to green ................................ ...........

1100

T101 (adapter)

DO-T39

Brown to blue ................................ ..............

650

Brown to red................................ ................

350

Yellow to white ................................ ............

Black to green ................................ .............

1 to 2 ................................ ..........................

T501

TW-25F26T

3 to 5 ................................ ..........................

0.6

attempted. When repairs are completed. apply new

6-11. Replacement of Printed Circuit Cards

protective coating. Proceed as follows to remove or

Replace a print-wiring or component card as follows:

apply protective coating:

a. Remove the panel-chassis from its case.

WARNING

b. Remove the card retainer.

Protective coating EC 1103 is toxic.

c. Withdraw the card from its receptacle by pulling

The work area must be well

it straight out.

ventilated.

Avoid breathing the

CAUTION

fumes.

If the coating comes in

When removing or installing a card,

contact with the skin, wash the

be careful not to damage compo-

affected area with soap and water

nents of the card or those of

immediately.

adjacent cards.

(1) Removal of protective coating.

d. Install the replacement card in its receptacle.

(a) If repairs are extensive, soak the

e. Align the cards and reinstall the card retainer.

card in trichloroethylene to soften the protective coating.

f. Reinstall the panel-chassis in the case.

Wipe the area clean with a lint free cloth.

(b) If repairs are minor, carefully scrape

6-12. Repairs

the protective coating from the area to be repaired using

a knife or similar sharp tool.

6-13. Card Repairs

(2) Application of protective coating.

Repair a printed-wiring card as follows:

(a) Clean the repaired area thoroughly

a. Two types of card defects are reparable

using a rubber eraser.

defective components and defective conductors.

(b) Prepare the protective coating by

Discard broken, cracked, or blistered cards.

mixing 70 parts of volume of coating EC 1103 with 30

CAUTION

parts by volume of naphtha. Stir the mixture thoroughly.

Use a pencil-type soldering iron with

a maximum rating of 25 watts when

card by spraying, dipping, or brushing. When brushing

repairing printed-wiring cards.

b. The printed-wiring cards are coated with

Figure 6-1. SAS bench test set, wiring diagram.

protective coating EC 1103. Remove the protective

coating from the immediate area before repairs are

(Located in back of manual.)