4–12 Component Test Procedures
Publication 1336 IMPACT-6.8 – November, 2002
3. If either diode is out of tolerance, refer to Replacing Volt-Sharing
Resistors and Dual Diodes in Chapter 5, Part Replacement
Procedures.
Table 4.E
Dual Diode Test
Component
Meter (+)
Lead
Meter (–)
Lead
Nominal Meter
Reading*
D1
Top
Bottom
Bottom
Top
Less than 1
Open
D2
Top
Bottom
Bottom
Top
Less than 1
Open
Note: Typical malfunction is shorted in both directions.
* Meter Used: Fluke
Model 87, set to “Diode” range.
Important: There is no diode on F3.
Capacitor Test
The only practical test for these capacitors is to look for signs of
damage: swelling, leaking, or burn marks. To replace the Bus
Capacitors, refer to Replacing Bus Capacitors in Chapter 5, Part
Replacement Procedures.
!
ATTENTION: Replace all guards before applying
power to the drive. Failure to replace guards may result
in death or serious injury.
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