IBM 3270 Maintenance Manual page 223

1.
Set the Power switch on the system unit (and
expansion unit, if attached) to Off.
2.
Partially remove the diskette-drive logic
board see Section 5, "Removal/Replacement
and Adjustments" and the instructions below.
• For a Type 1 diskette drive, leave all
connectors except P5 and P6 connected.
• For a Type 2 diskette drive, leave all
connectors except
HDO
and
HDI
connected.
3. Lift the diskette-drive logic board just enough
to see the head· assembly.
4.
Move the head assembly away from track
o.
Track
39
Track 0
Type 1
Track 391
CONTINUE
3-600-24
Maintenance Information