Nortel SONET AccessNode User Manual page 9

Replacing modules in a common-equipment shelf
Chapter contents 7-1
Procedure 7-1
Procedure 7-2
Procedure 7-3
Procedure 7-4
Procedure 7-5
Procedure 7-6
Procedure 7-7
Procedure 7-8
Procedure 7-9
Procedure 7-10
Procedure 7-11
Procedure 7-12
Procedure 7-13
Procedure 7-14
Procedure 7-15
Procedure 7-16
Procedure 7-17
Procedure 7-18
Testing the batteries and rectifiers
Chapter contents 8-1
Warnings and cautions 8-2
Procedure 8-1
Procedure 8-2
Procedure 8-3
Procedure 8-4
Procedure 8-5
Procedure 8-6
Procedure 8-7
Replacing the low-voltage disconnect unit
Chapter contents 9-1
Warnings and cautions 9-2
Procedure 9-1
Procedure 9-2
Procedure 9-3
Procedure 9-4
Procedure 9-5
Procedure 9-6
MBP routine maintenance
Chapter contents 10-1
Routine maintenance intervals 10-1
Procedure 10-1
Procedure 10-2
Procedure 10-3
Ordering information
Chapter contents 11-1
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
Replacing an NT4K30 DS3 I/O card 7-3
Replacing an NT4K31 DS1 protection bridge card 7-4
Replacing an NT4K32 DS1 input card 7-7
Replacing an NT4K33 DS1 output card 7-9
Replacing an NT4K50 side interconnect left 7-11
Replacing an NT4K51 side interconnect right 7-13
Replacing an NT4K52 processor card 7-14
Replacing an NT4K53 maintenance interface card 7-17
Replacing an NT4K54 test access card 7-20
Replacing an NT4K55 access interface card 7-22
Replacing an NT4K56 transport interface card 7-24
Replacing an NT4K57 integrated remote test unit 7-26
Replacing an NT4K58LA serial I/O card 7-28
Replacing an NT4K58MA common-equipment power card 7-30
Replacing an NT4K75 timing and cross-connect 7-34
Replacing an NT7E05 OC-12 VTBM optical interface 7-37
Replacing an NT7E04 DS1/VT mapper 7-45
Replacing an NT7E08 DS3 mapper 7-50
Rejuvenating the batteries 8-5
Testing and replacing the batteries 8-8
Replacing a rectifier 8-14
High voltage shutdown adjustments for replacement
rectifiers 8-16
Setting equalize (EQL) voltage level
Adjusting the float voltage
Load sharing adjustments for replacement rectifiers 8-25
Removing and installing an LVD 9-3
Restoring power to the system 9-9
Verifying the LVD indicators 9-10
Adjusting the LVD unit 9-13
Adjusting the load sharing 9-16
Return the system to service 9-18
Checking and adjusting rectifier voltages 10-2
Changing the MBP air filter 10-6
Replacing the NT4K2630 MBP blower module 10-10
8-21
8-23
Contents vii
7-1
8-1
9-1
10-1
11-1