IBM 5280 Maintenance Information Manual page 28

DANGER
Capacitor discharge voltage might be present at the
socket when the AC drive motor power cable is
disconnected.
13. Disconnect the AC drive motor power cable
iD.
14. Remove the timing pin.
15. Power on.
16. Install a jumper from
fJ
(ground) to
II
(-disable
stepper motor).
17.
31SD
Install a jumper from
D
(ground) to
B
(Me-D).
O i~:
TPC
TPD
TPE
TPF
TPG
II
18. I f the ti m ing pin passes freely through the stepper
motor pulley into the timing hole in the casting, go to
step 23. If the timing pin does not pass freely,
proceed with step
19.
19.
Remove the timing pin.
20.
Remove the jumpers installed in steps 16 and 17.
21 . Power off.
22. Go to 339, step 4.
23. Remove the timing pin.
24. Go to 339, step 12.
TPH
0 0 0
TPHOl
16 Head/Carriage Assembly
TPA
oTPBOl TPB
TPC
TPD
341