Diskette Drive - IBM 3274 51C Maintenance Information

F.3.7 Diskette Drive Control Card
F.3.7.1 Control Card Removal (Figure F·40)
1. Power down.
2. Remove the six connectors
0
from the control card.
3. Loosen the two retainer screws
e
and turn the two
retainers
e
outward until they are no longer in the path
of the control card
e .
4. Remove the control card.
F.3.7.2 Control Card Replacement (Figure F·40)
1. Reinstall the control card
e.
2. Turn the two retainers
e
inward slightly until they pre·
vent the card from moving.
3. Tighten the two retainer screws
CD .
4. Reinstall the six connectors
0
on the control card.
5.
Power up.
F.3.7.3 Control Card Test Pins and Connector Pins
See Figure FA1 to check test points and Figure F·42 to
check connector pins.
Stepper Motor
Connector
Head Connector
e
Control Card
e
Control Card
.
,
/ :
Retainer (2)
G
Control Card
/ Retainer Screw (2)
~
Head Load
~
Solenoid Connector
~_-I.._
.
.....-:::~ili._----
G
LED Connector
110 Connector
Figure F·40. Diskette Drive Control Card
F~O
PTX
Connector