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C1, TM 11-6625-646-15
Table 6-4. Dc Resistance of Transformers
Reference
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 ................................ ............
45
Black to green ................................ .............
55
1 to 2 ................................ ..........................
11
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
(c) Apply the protective coating to the
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.)
53

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