IBM 3270 Maintenance Manual page 233

3-600-34
You may have a bad connection or a broken
wire. qheck the continuity of the diskette drive
signal cable as follows:
1.
Set the Power switch on the system unit (and
expansion unit, if attached) to Off.
2. Disconnect the diskette drive signal cable
from the Diskette Drive Adapter and diskette
drive.
3. Carefully inspect the cable connectors for
bent or broken contacts. Inspect the
connectors on the adapter and on the diskette
drive logic board for cracks or corrosion.
4. Set the meter on the Ohms (xl) scale.
5. Refer to the tables on the next page and
check the continuity of the signal cable. The
meter should indicate approximately 0 ohms.
OC'II1!!3ef!!1!~_
Drive A
Connector
Adapter End
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Maintenance Information