IBM 4975 02L Maintenance Information page 54

3207 End-Of-Forms Switch
Service Check
1. Switch off the printer power.
2. Remove the top cover (3052).
3. Remove the paper deflector and reinstall the plat-
en (3101).
4. Ensure that the actuator lever
0
is approximately
centered in the platen groove
G.
If not, loosen
the end-of-forms switch assembly mounting screw
o
and move the assembly. so that the actuator
lever is centered. .
5. Set a CE meter to the R x 1 scale.
6. Connect the positive CE meter lead to N / C and
the negative lead to the switch common
e.
7. Check that the contacts transfer from 0.25 to 1.27
mm (0.010 to 0.050 in.) from the bottom of the
platen groove
G
while moving the platen-release
lever forward and backward.
Adjustment
1. Perform the pressure roll service check (3103).
2. Switch off the printer power.
3. Remove the top cover (3052).
4. Move the paper-release lever to the forward posi-
tion.
5. Remove the paper deflector and install the platen
(3101).
6. Ensure that the actuator lever
0
is approximately
centered in the platen groove
G.
If not, loosen
the end-of -forms switch assembly mounting screw
o
and move the assembly. so that the actuator
lever is centered.
3-32 SY34-0613
7. Set a CE meter to the R x 1 scale.
8. Connect the positive CE meter lead to N / C and
the negative lead to the switch common
e.
9. Loosen the holding screws
CD
and pivot the switch
assembly mounting bracket
G
forward.
10. Insert a 0.76 mm (0.030 in.) gauge between the
top of the actuator lever and the bottom of the
platen groove
G.
Slowly pivot the mounting
bracket toward the rear until the switch contacts
open.
11. Tighten the screws
CD.
12. Check, and adjust again if necessary.
13. Remove the platen (3101).
14. Reinstall the paper deflector and the platen
(3101).
15. Move the paper-release lever backward and
forward to ensure that the switch override arm
e
opens and closes the switch contacts.
16. Move the paper-release lever to the rear position.
17. Put sheets of paper together until they have a
thickness of 0.30 to 0.51 mm (0.012 to 0.020 in.).
Place the paper between the platen and the actua-
tor lever.
18. Loosen the setscrew
G
and pivot the override arm
so that the end of the arm stops on top of the
actuator lever, without moving the lever.
19. Tighten the setscrew.
20. Check and adjust again if necessary.
21. Disconnect the CE meter.
22. Remove the platen (3101).
23. Reinstall the top cover (3052).