to test circuits of the synchronizer assembly. Per.
ductor and connector pins will be indicated by a
meter indication of O ohms.
form the resistance measurements given in table
with all power removed from equipment.
4-15. Testing Synchronizer Assembly
Test safety circuit breaker light DS1 by substitu-
Use the AN/URM-105, arranged as an ohmmeter,
receptacle or damaged threads, replace it as
4-16. Testing Switchbox (PU-699/M)
With the AN/URM-105 arranged as an ohmmeter,
(1) Prop open the front cover of distribution
place test probe on each side of switch (S1
panel of the distribution box and remove recepta-
through S4) and with power off and switch S1
this on all three circuits of each switch. If one
(2) Remove back panel of distribution box.
Remove cover and attaching hardware. Tag and
defective and must be replaced.
disconnect wiring, then remove connector-recepta-
(3) Install replacement connector-receptacle
If the brackets, braces, mounting bases and ac-
in distribution panel, install mounting hardware,
cessory boxes are bent or missing hardware,
connect wiring, and receptacle cover, install back
remove and straighten. If unable to correct, re-
panel and close front panels. Replace a defective
place the defective item. Replace missing hard-
(4) To replace defective connector-receptacle
a. Inspection. Inspect condition of circuit
and remove screws holding control panel. Prop
breakers, panel assembly bus bars, current trans-
up the control panel and remove mounting hard-
formers, ammeters and wiring. If circuit breakers
ware. Remove connector cover, tag and discon-
don't operate smoothly, panel is dented, bus bars
nect wire leads and remove connector-receptacle
from portable distribution box.
burned, or wiring is burned or loose, refer condi-
(5) Install replacement connector-receptacle
tions to direct support maintenance.
in portable distribution box, and install mounting
hardware and cover. Install wire leads, insert
control panel into place inside the portable dis-
on each portable distribution box. If visual inspec-
tribution box, add mounting screws and close lid.
tion indicates a cracked or corroded connector-
Replace a defective receptacle cover.