Figure 2-16. Stator Winding Points

TM 9-2920-257-30&P

[2] Reverse phase leads, and observe resistance between pin B or C of the output connector and each

of the six heat sink terminals S (fig. 2-15). All six readings should be very high. If all six readings are not alike, the diode

rectifier assembly is defective. Replace the front housing assembly, in accordance with paragraph 3-4b, steps 1 thru 17.

(6) Stator Tests - Remove all phase leads (P1-P6) from front housing (fig 2-16).

NOTE

A grounded stator is difficult to confirm by static check. Examine stator for burnt

insulation or loose coil.

NOTE

It may be necessary to probe under the sleeves of the phase leads to make

electrical contact.

(a) Open stator winding - Set ohmmeter for X10 scale and make sure ohmmeter is zeroed. Connect

multimeter leads to each successive pair of phase stator windings (fig. 2-16). Ohms should read less than 1 ohm

between each pair of stator phase windings. If ohms reads very high, the stator is open and must be replaced. Replace

or repair stator and shell assembly, in accordance with paragraph 3-4b, steps 1 thru 12.

(b) Shorted stator winding - Set ohmmeter for X1 scale and make sure ohmmeter is zeroed. Connect

multimeter leads to each phase lead and ground terminal located on outside of front housing (fig. 2-16). Ohms should

read very high. If ohms read zero, the stator is grounded and must be replaced. Replace or repair stator and shell

assembly, in accordance with paragraph 3-4b, steps 1 thru 12.

Figure 2-16. Stator Winding Points

Change 1 2-23/(2-24 Blank)