363-205-401 Power Up: DLP-511
Issue 7, March 1997 Page 3 of 4
22. Replace
PCU
with
PCU
removed previously.
23. Is
PCU
being installed in a frame-type RT with bulk powering (J1C182BB bulk
power shelf)?
If
YES,
then proceed to Step
30.
If
NO,
then continue with Step
24.
24.
NOTE:
Two dual bank assemblies share a common power shelf.
Is
PCU
being installed in second dual bank assembly?
If
YES,
then continue with Step
25.
If
NO,
then proceed to Step
29.
25. Replace associated
336A RECTIFIER
located in power shelf.
26. On
PCU
, connect DMM test leads to
GND
jack and −
48
jack.
27. Does DMM indicate between −42 and −56 volts?
If
YES,
then proceed to Step
31.
If
NO,
then continue with Step
28.
28. Replace
336A RECTIFIER
with
336A RECTIFIER
removed previously.
29. Check wiring using SD-7C117-01 or SD-7C117-02 and, if system is being
equipped with FTTH feature, also use SD-7C118-02 and SD-7C150-01.
Repeat procedure from Step
3
after locating and correcting trouble.
30. Check fuses in RT dual bank assembly
LFU
and bulk power shelf
BFU
. If trou-
ble is not found, check wiring at RT dual bank assembly and bulk power shelf
using SD-7C117-01 or SD-7C117-02 and SD-7C130-01, respectively. Repeat
procedure from Step
3
after locating and correcting trouble.
31. Disconnect DMM test leads.
STOP. YOU HAVE COMPLETED THIS PROCEDURE.
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