TROUBLESHOOTING & REPAIR
F-58 F-58
RANGER 305D
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OUTPUT RECTIFIER BRIDGE TEST (continued)
FIGURE F.15
X1
DC+
DC-
D5
D6
D3
D4
D1
D2
AC3
AC2
AC1
TEST PROCEDURE
1. Turn the engine off.
2. Perform the Case Cover Removal proce-
dure.
3. Perform the Chopper Module Capacitor
Discharge procedure.
Electrically isolatethe three-phase input
terminals of the output bridge rectifier as
follows:
4. Mark leads W1, W2, and W3 so they can be
properly reconnected after the test is com-
plete. Remove these leads and position
them so they do not come in contact with any
part of the rectifier. See figure F16. See
wiring diagram.
Electrically isolate the DC output termi-
nals of the rectifier:
5. Mark the leads connected to the positive and
negative terminals of the output bridge recti-
fier to assure that they can be reconnected
properly. Seefigure F-16.
6. Remove leads W4, W5, and W10 from the
positive terminal of the Rectifier, and remove
leads W6 and W11 from the negative termi-
nal. Position these leads so they do not
come to contact with any part of the rectifier.
See Figure F.16. See the wiring diagram..