Nortel 1000E Maintenance Manual page 129

7 Check the tracking of the Clock Controller with the following overlay:
LD 60 SCK 0
If it is not tracking or is not locked, use the following commands to track:
LD 60 TRCK PCK/SCLK
Removing daughterboards from the NTBK50 card
Because of the physical layout of the motherboards and daughterboards,
remove the NTAK20 before the NTAK93/NTBK51. To remove the NTAK20
and NTAK93/NTBK51 from the NTBK50 card, follow the steps in
Procedure 15.
Procedure 15
Removing the NTAK20 and NTAK93/NTBK51 from the NTBK50 card
1 Starting at the two corners opposite the connector, gently lift each corner
out of the locking groove of the standoff.
2 At the two corners adjacent to the connector, gently lift the entire side until
the mounting holes are clear of the locking groove of the standoff.
3 To remove the connector pins, grasp the edge of the board adjacent to
the connector and lift gently.
If more than one NTBK50 card is installed, the additional cards may not carry
daughterboards, depending on the system configuration. At least one
NTAK20 for each system is required.
Replacing equipment
End of Procedure
End of Procedure
Communication Server 1000E
Page 129 of 162
Maintenance