IBM 3270 Maintenance Manual page 578

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7. Insert a scratch diskette into the diskette
drive.
8. Place the diskette drive (left side up) on the
system unit power supply.
9. Connect a jumper between J-1 pin 16 on the
diskette-drive logic board and ground.
10. Plug power connector P-3 into the
diskette-d.rive logic board.
11. Plug the system unit power cord into the
system unit, then into the outlet.
12. Set the system unit Power switch to On.
Speed Adjustment
Variable Resistor
(Rear View)
October 1984 5-602-17