DLP-511
: Detailed Level Procedure 363-206-305
Page 2 of 2 Issue 3, June 2000
DDM-2000 F
IBER
R
EACH
 W
IDEBAND
 S
HELF
7.
!
CAUTION:
Before removing a fuse that does not have a failure indicator activated, 
you must first verify that –48 V is available to the shelf through the fuse 
that is not going to be removed. 
 Remove the 
SYSCTL
.
8. If fuse 
FA
 is being removed, verify that –48 V DC is present between 
–48V A
 
(negative connector) and 
–RTN A
 (positive connector) on backplane of shelf.
If fuse 
FB
 is being removed, verify that –48 V DC is present between 
–48V B
 
(negative connector) and 
–RTN B
 (positive connector) on backplane of shelf.
Requirement: Voltage must be between –40.00 V and –60.0 V DC
9. Was requirement met?
If 
YES
, continue with 
Step 10
. 
If 
NO
, proceed to 
Step 13
.
10. Reinstall 
SYSCTL
.
11. You can safely remove one fuse as required, if power is maintained to the shelf 
through the other fuse.
12.
STOP. YOU HAVE COMPLETED THIS PROCEDURE
.
13. Trouble in User Panel, power feeder(s), or office battery distribution. If User 
Panel needs to be replaced, see 
DLP-502
.
If you need assistance, notify your supervisor, your local technical support 
organization, or call Lucent Technologies RTAC, per local operating 
instructions.
14.
STOP. YOU HAVE COMPLETED THIS PROCEDURE
.