Ptx Removal And Replacement; Removal; Replacement - IBM 5280 Maintenance Information Manual

375
PTX REMOVAL AND REPLACEMENT
Removal
1.
2.
3.
4.
5.
Power off.
Disconnect the LED cable connector
1m
from the
diskette drive control card
D.
(Note the cable path
for replacement.)
Close the diskette locking lever
O.
Loosen the bai I lever screw
II.
Push the bail
fJ
inward slightly and disconnect the
bail actuator cable eyelet
B
from the bail lever
O.
6. Open the diskette locking lever
O.
7. (51 TD) Place a piece of clean paper between the
heads, or insert a scratch diskette.
8.
Remove the four diskette guide screws
1m .
CAUTION
(31 SD) Do not let the head hit the pressure pad or the head
could be damaged. (51TD) Do not let the heads hit each
other or the heads could be damaged.
54 LED and PTX Assemblies
9. Remove the diskette guide
ill
by lifting it up and
sliding the bailout from under the head load arm
375
1m.
10. Remove the remaining cables from the diskette drive
control card
IJ.
(Note the cable connections for
the replacement procedure.)
11. Loosen the two retaining screws
II.
12. Turn the two card retainers
iii
out of the way and
remove the diskette drive control card
IJ.
13. Remove the two PTX mounting screws
1m.
14. Remove the PTX assembly
m.
Replacement
To reinstall the PTX assembly, reverse the steps in the
removal procedure then go to 347, bail replacement
procedure, step 2.