IBM 5280 Technical Newsletter page 13

563
ROS PATCH CARD
REMOVAL AND REPLACEMENT
Removal
1. Power off.
2. Remove the data station covers (031).
3. Remove the logic card cover (513).
4. Disconnect the signal cable Dfrom the ROS
patch card.
5. Remove the retainer clip
a
and remove the power
cable from
J0211.
6. If a power cable is present at
J0311 ,
remove the
retainer clip
II
and remove the cable.
7. Remove the ROS patch card.
CAUTION
The logic cards will overheat if patch cards (either ROS
patch or dummy patch) are not installed.
102
583
9. If you are not going to install a ROS patch card in
the same position as the one you just removed,
install a dummy patch card in that position.
Replacement
For replacement of the ROS patch card, observe the
following and reverse the steps in the removal procedure.
1. Align the corner cut on the Signal cable connector
II
with the corner cut of the connector on the
ROS patch card.
2. Route the cables correctly (561).