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TM 55-4920-430-13
DIGITAL
STEP
CONTROL/SWITCH
NO.
`NOMENCLATURE
POSITION
TEST CONNECTION
NORMAL RESULTS
(2) None
(2) Connect
(2) None
(2) None
J3-JJ and
J3-HH to J1-C
(3) -0.02 to +0.02 Vdc
(3) DASH switch
(3) J3-w to J3-AA
(3) TF2
S51
(4) Same
(4) Same
(4) Disconnect
(4) None
connection
from J3-HH and
J3-JJ to J1-C.
(5) +3. 563 to 3. 937Vdc
(5) Same
(5) Same
(5) Apply +15Vdc
at J3-HH (+) to
J3-JJ (-), and
measure voltage
between J3-w
(+) ad J3-AA (-)
(6) +6.0 to +7. 0Vdc
(6) Same
(6) Same
(6) Adjust Power
Supply to +28Vac.
Apply +28Vdc to
J3-HH (+) and
J3-JJ (-). Mea-
sure voltage bet-
ween J3-w (+) and
J3-AA (-).
(7) -3.937 to -3.563
(7) Same
(7) Same
(7) Disconnect +28
Vdc
Vdc connections.
Apply +15Vdc
to J3-JJ (+) and
J3-HH (-). Mea-
sure voltage
between J3-w (-t-)
and J3-AA (-).
(8) Same
(8) Same
and J3-AA (-).
4-57
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