IBM 3270 Maintenance Manual page 610

5. Remove all option adapters (5-20-3).
6. Remove the mounting screws on the left side
of drive D.
Mounting Screws
Note: Shown below are examples of the fixed
disk drive and connectors. These may not be
the same as those in your system; however,
certain items are the same.
•
J1, the control connector, has 34 pins.
• J3, the data connector, has 22 pins.
• The Power connector has 4 pins and:
May be mounted on the logic board or,
- May be on a pigtail.
October 1984· 5-1700-11