TM 5-4310-354-14
(3) Rectifier bridge check. The rectifier bridge
has a grounded heat sink and an insulated heat sink
connected to the output terminal. An insulating washer
is located between the insulated heat sink and end
frame. To check rectifier bridge, connect an ohmmeter
to the grounded heat sink and one of the three terminals
as shown in A, figure 7-4. IMPORTANT: If rectifier
bridge is constructed as shown in B, figure 7-4, connect
ohmmeter pressing down very firmly onto flat metal
connector, and not onto threaded stud as shown in A,
grounded heat sink and the same terminal. If both
readings are the same, replace the rectifier bridge. A
good rectivier bridge will give one high and one low
reading. Repeat this same test between the grounded
heat sink and the other two terminals, and between the
insulated heat sink and each of the three terminals. This
makes a total of six checks, with two readings taken for
each check. The ohmmeter check of the rectifier bridge,
and of the diode trio descripted in step 2 above, is a
valid and accurate check. DO NOT replace either unit
unless at least one pair of readings is the same.
Rectifier bridges may vary in appearance but are
completely interchangeable.
TS5-4310-354-14/7-3
Figure 7-3. Diode trio check
7-4
