IBM 6151 Maintenance And Service Manual page 150

Step 18
Be sure the external power cable to the system unit is plugged into
the system unit and an outlet and that the outlet has correct
voltage. If needed, see Section 5.
AJZBl68
DID
YOU FIND A PROBLEM?
YES If the outlet does not have correct voltage have the
customer correct the problem, otherwise, plug the external
power cable in.
This completes the repair.
NO Record SRN 16-880; then go to "Step 2" on page 3-8800-2.
3-0030-18 Service Manual