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F-17
TROUBLESHOOTING & REPAIR
F-17
6. If the Input Rectifier does not meet
the acceptable readings outlined in
Table F.2. the component may be
faulty. Replace.
Note: Before replacing the Input
Rectifier(D9) check the input
power switch (S1) and perform
the
Power Board Resistance
Test
. Also check for leaky or
faulty filter capacitors.
7. When installing a new Input
Rectifier, torque the mounting nuts to
44IN-LBS. A thin coating of Dow
Corning 340 Heat Sink Compound
(Lincoln E1868) is recommended.
Torque the lead terminals to 31IN-
LBS. See
Input Rectifier Bridge
Removal And Replacement
.
8. If the Input Rectifier is good be sure
to reconnect leads #207, #207A and
#209 to the correct terminals and
torque to 31IN-LBS. See wiring dia-
gram and Figure F.2.
INPUT RECTIFIER TEST (continued)
INVERTEC V250-S
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TEST POINT TERMINALS ANALOG METER X10 RANGE
+ Probe - Probe Acceptable Meter Readings
A 207 Greater than 1000 ohms
B 207 Greater than 1000 ohms
C 207 Greater than 1000 ohms
A 209 Less than 100 ohms
B 209 Less than 100 ohms
C 209 Less than 100 ohms
207 A Less than 100 ohms
207 B Less than 100 ohms
207 C Less than 100 ohms
209 A Greater than 1000 ohms
209 B Greater than 1000 ohms
209 C Greater than 1000 ohms
TABLE F.2 Input Rectifier Test Points