TM 11-6625-441-34
the case by following the instructions contained in
(1)
Select a drill bit of appropriate size to
drill out
the rivets holding the defective item.
(2)
Remove the defective hinge, latch or
3-10. Removal and Replacement of Lampholders
handle.
a. Removal.
(3)
Replace the defective item with a new
(1) Remove the interphone test set chassis
one.
f r o m the case by following the instructions
(4)
Hold in place with new rivets.
contained in paragraph 3-6 b.
3-8. Removal and Replacement of Switches
(2) Tag and unsolder the wires connected to
the lampholder.
a. Removal.
(3) Remove and retain the indicator lens,
(1) Remove the interphone test set chassis
l a m p and hexagonal mounting nut from the
f r o m the case by following the instructions
lampholder.
contained in paragraph 3-6 b.
(4) Remove the lampholder from the front
(2) Tag and solder all wires connecting to the
panel.
switch. Be careful not to burn the insulation
(5) Remove and retain the hexagonal
covering the wire.
mounting nut on the lampholder.
(3) Remove and retain the hexagonal
mounting nut which secures the switch to the
b. Replacement.
(1) Replace the hexagonal mounting nut
interphone test set panel.
removed in a (5) above on the new lampholder. A
(4) Remove the switch.
mounting nut is not supplied with the item.
b. Replacement.
(1) Refer to figure FO-4 and solder jumpers
(2) Place the new lampholder through the
to the switch as required.
appropriate hole in the interphone test set front
(2) Use the hardware removed in a (3) above
panel and secure with the hexagonal mounting
to secure the switch to the interphone test set
nut removed in a (3) above.
panel.
(3) Connect and solder the wires removed in
CAUTION
a (2) above following the tag instructions and
Be careful not to burn insulation, use
excessive solder, or drop solder beads into
(4) Place the lamp and lens removed in a (3)
the switch as this may cause conduction
above on the lampholder.
between switch contacts.
(5) Replace the interphone test set chassis
(3) Connect and solder the wires removed in
into the case by following the instructions con-
a (2) above to the correct contacts of the new
tained in paragraph 3-6c.
switch by following the tag instructions.
3-11. Removal and Replacement of Fuseholders
(4) Replace the interphone test set chassis
a. Removal.
into the case by following the instructions con-
(1) Remove the interphone test set chassis
tained in paragraph 3-6c.
f r o m the case by following the instructions
3-9. Removal and Replacement of Relay K1
contained in paragraph 3-6 b.
(2) Remove and retain the fuseholder cap
a. Remova[.
(1) Remove the interphone test set chassis
and fuse.
f r o m the case by following the instructions
(3) Tag and unsolder the wires connected to
the fuseholder.
contained in paragraph 3-6 b.
(4) Remove the hexagonal mounting nut
(2) Tag and unsolder all wires connected to
which secures the fuseholder to the interphone
relay K1.
test set panel.
(3) Remove and retain hardware securing
(5) Remove the fuseholder.
relay K1 to its mounting bracket.
b. Replacement.
(5) Remove the relay.
b. Replacement.
(1) Use the hexagonal mounting nut
removed in a (4) above to secure the fuseholder to
(1) Secure the replacement relay K1 to its
t h e interphone test set panel. If the new
mounting bracket with the hardware removed in
fuseholder has a hexagonal mounting nut with it,
a (3) above.
(2) Connect and solder the wires removed in
then dispose of the nut which was retained.
a (2) above to the correct pins following the tag
(2) Connect and solder the wires removed in
instructions and figure FO-4.
a (3) above following the tag instructions and
(3) Replace the interphone test set chassis in
3-9
