TM 55-4920-402-13&P
4-21. Disassembly of Balancer (Fig. C-2).
a. Remove rear cover (1) by removing four
screws (2) and sliding cover off of chassis (51).
b. Remove IPS meter M1201 (17) as follows:
(1) Disconnect red and black leads from
meter.
(2) Remove three screws (18), washers (19),
and nuts (20) attaching meter to case. Remove
meter (17) from chassis (51).
c. Remove R.P.M. TUNE potentiometer R1201
(21) as follows:
(1) Tag leads for identification and unsolder
from R1201.
(2) Pull knob, part of (27), from front panel.
(3) Remove R1201 (21), 10-turn dial (27), and
bracket (26) by removing two screws (23),
washers (24), nuts (25), and springs (22),
(4) Loosen two sesetscrews holding 10-turn
dial (27) to shaft of R1201 (21) and separate 10-
turn dial from R1201.
NOTE
The two circuit cards (8 and 12) are
hard wired to the chassis. Replace com-
ponents on the cards in accordance
with instructions in Section VII.
4-22. Disassembly of Strobex (Fig. C-5).
WARNING
Dangerous voltages are present in the
Strobex which may cause death or in-
jury. Disconnect Strobex from
Balancer and discharge capacitors
C1201 (22) and C1202 (23) prior to any
repair. The flash tube (29) is at several
atmospheres pressure and may cause
injury if it is broken. Wear safety
shield or safety glasses.
CAUTION
Avoid twisting or bending the flash
tube as the quartz envelope will break.
Avoid touching glass envelope with
fingers. Body oils from fingerprints
may cause etching of the glass when
hot and may result in fracture. Handle
flash tubes by metal ends.
a. Remove rear cover (18) by removing six
screws (l), six lock washers (2), and six flat-
washers (3) and sliding cover out of case (55) to
length of electrical leads.
b. Remove circuit card (4) by grasping end and
pulling out of connector (5).
c. Remove capacitors C1201 (22) and C1202 (23)
by removing two screws (21) and clips (20). Move
C1201 and C1202 out of case as far as leads per-
mit, Tag and unsolder leads as necessary.
d. Remove diode package (24) by removing
three screws (25). Move diode package out of case
as far as leads permit. Tag and unsolder leads as
necessary.
e. Remove lens (26) over reflector assembly (43)
and flash tube V1201 (29) by removing four nuts
(27).
f. Remove four screws (30) and nuts (27) secur-
ing reflector (43) to case. Remove reflector and
flash tube C1201 (29) out through back.
g. Identify the three leads coming from the han-
dle assembly (49), and tag and unsolder them
where they connect to the MODE switch S501
(11) and connector P502 (5).
h. Remove handle assembly (49) by removing
four screws (47) and washers (48) attaching han-
dle to case (55).
i. Loosen three screws (50) from nuts (51) to
separate handle (49).
4-23. Removal of Flash Tube (Fig. C-5).
WARNING
The flash tube is at several at-
mospheres pressure and may cause in-
jury if broken. Wear a safety shield or
safety glasses. Avoid twisting or ben-
ding the flash tube or the quartz glass
will fracture,
a. Remove lens cover as indicated below.
b. Remove four nuts (27) attaching lens (26) to
case (55).
NOTE
Do not remove red wire and clip from
flash tube until flash tube is clear of
case.
4-16.6
Change 4