TAP-105
: Trouble Clearing 363-206-305
Page 2 of 2 Issue 3, June 2000
DDM-2000 F
IBER
R
EACH
N
ARROWBAND
S
HELF
10. Has the replacement unit that was installed in
Step
8
been replaced while
performing this procedure?
11. Press
LED TEST
button on
DSXBIU
.
Requirement:
FAIL
LED lights on
PCU
.
If LED does not light, replace the
PCU
by repeating this procedure starting at
Step
4
.
12. Measure voltage at test points −
48VDC
and −
48VDC RETURN
.
Requirement: −42 to −60 V DC.
13. Were
PCU
voltage requirements met?
14. Remove your wrist strap, secure the electronics compartment.
15.
STOP. YOU HAVE COMPLETED THIS PROCEDURE
.
If
YES
, escalate to next level of support.
If
NO
, replace unit by repeating this procedure starting at
Step
4
.
If
YES
, continue with
Step
14.
If
NO
, replace
PCU
by repeating this procedure from
Step
4
.
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