TM 5-3610-253-14
35E, Special Electronic Devices Repairer
MOS:
Flat Tip Screwdriver
TOOLS:
5 mm Hex Head Key Wrench
Digital Multimeter
Extender Board
SUPPLIES:
Rubber Matting
Turn off power.
a.
(1) Turn Star-Delta switch to Y position, then to O position.
(2) Turn main power switch to O position.
b. Remove front and rear electronics enclosure covers.
c.
Extend IAR circuit board.
d.
Turn on power.
WARNING
Electrical shock hazard. You must stand on rubber matting as a protective
measure before performing this procedure. Death or serious injury may
occur.
(1) Turn main power switch to I position.
(2) Turn Star-Delta switch to Y position. After the main motor has
reached full speed, turn switch to
position.
(3) Press control power on switch.
e.
Move backgauge forward or backward as required until the backgauge
position is displayed on the measurement display.
f. Check pin 9 a/c for +5.1 V. Use ground post on SCU as ground. If
+5.1 V is not present, check output of PS5 (paragraph 5-40.63). If
correct, replace SCU motherboard (paragraph 5-40.34).
Check pin 16 a/c for +12 V. Use ground post on SCU as ground. If
g.
+12 V is not present, replace HK circuit board (paragraph 5-40.31).
h. Check pin 24 a/c for +24 V. Use ground post on SCU as ground. If
+24 V is not present, check output of PS24. If correct, replace SCU
motherboard (paragraph 5-40.34).
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