Nortel DMS-100 Series Maintenance Manual page 679

Rectifier replacement in an NT8X01AA, AB, BA, BB
13 Check that the sequence settings (Seq. Set) DIP switch is set to the setting
indicated in the following table.
RECTIFIER
Rectifier 0
Rectifier 1
14 Open the rectifier door and verify that fuses F1, F2, F3, and F4 are in place.
15 To reconnect the load to the rectifier, switch the rectifier breaker on the PCU
to ON.
Note: You can have to toggle the PCU breaker.
16 Remove fuse F4 and operate the rectifier ac breaker to ON.
Note 1: Do not remove fuse F4 if without a battery.
Note 2: You can have to toggle the ac breaker.
17 At the front face of the rectifier, set the dc breaker to ON.
Note: You can have to toggle the dc breaker.
18 Insert again the fuse F4 removed before in step 16.
19 Adjust the rectifier voltage screw (VA) so that both rectifiers supply an equal
amount of current. Check the voltage and make sure the voltage is 52.0 Vdc,
±0.3 V.
20 This inspection procedure is complete.
OPM routine maintenance procedures
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DMS-100 Family OPM Maintenance Manual XPM14 and up
13-77
OPM
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