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 TM 5-4120-386-14
4-28. RECTIFIER -Continued.
LOCATION/ITEM
ACTION
REMARKS
Inspection
a.
Inspect rectifier (4) for
external damage.
b. Inspect capacitors (2 and
3) for external damage.
Test
1. Rectifier
Apply 24-28 VAC to input
a.
See Figure E-2.
terminals (unmarked).
b. Check for 24-28 VDC across
output terminals (marked
pos and neg).
Replace if fails test.
c.
2. Capacitor
a.
Check for internal condition
by placing the test leads of an
ohmmeter on the terminals of the
capacitor.
b. Ohmmeter needle should move
rapidly toward top of the scale;
then slowly return toward zero
if the capacitor is good.
c. If needle moves to top of scale and
remains there, the capacitor is in-
ternally short-circuited: if the
needle does not move, the capacitor
contains an open circuit.
d . Replace capacitors with short/open
circuits.
Installation
Install shrink sleeving on
a.
capacitor C6 (3).
See Figures
b.
Solder capacitors (2 and 3) to
E-1 and E-2.
rectifier (4).
Install rectifier (4) using
c.
screws (1).
d.
Connect leads and remove
tags on wires.
See
Install junction box.
e.
See
f.
Install control module.
See
Install evaporator inlet louver.
g.
See
h.
Install front top cover.
i.
Reconnect power.
4-69
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