Service manual

Page 6-37
Section 6. Replacement Procedures
PN 9001080
Rev. A
SATO M-8485Se Standard Print Engine
Service Manual
6.16 Replacing the Platen
STEP PROCEDURE
1. Switch the printer OFF and disconnect the power cable.
2. Position for access to the underside of the printer. Remove screw from cabinet
side and raise the lid. Figs. 6-60
3. Unlatch the head lock lever if engaged. Fig.6-61
4. Release the nip roller latch and swing open the nip roller assembly. Fig. 6-61
5. Unfasten the thumb screw and remove the nip roller assembly. Figs. 6-62
6. Remove (2) Allen screws attaching bracket to platen frame Fig. 6-63
7. Remove (4) Allen screws attaching cradle frame to chassis. Use an open end
wrench and remove pin. Pry off cover and remove Allen screw under cover.
Fig. 6-64
8. Remove (1) Allen screw which holds one side of the peel bar to the small
bracket that is attached to the chassis. Fig. 6-65
9. Reposition printer for access to the motor. Loosen (2) motor mounting screws
to free belts from platen and feed rollers. Fig. 6-66
10. Carefully separate the cradle frame containing the platen and components
from the chassis. The peel bar will still be attached on one end to the cradle
frame. Fig. 6-67
CAUTION! Be careful of the cable connections which are attached.
11. Remove E clip from the end of the shaft which holds a stepped gear to the
end of the platen shaft. Push shaft slightly back into the gear so that the end
of support bearing will clear the cradle. Repeat this step for the feed roller.
Figs 6-67 & 6-68
12. Push shaft slightly forward so that the end of the support bearing will clear the
cradle frame. Platen and components can now be easily separated.
Figs. 6-68
13. Replace the platen roller and reattach the components. Position collar against
bushing and tighten screw after installation. Figs. 6-69
14. Reassemble other parts previously removed.
15. Remount the motor and adjust belt tension as outlined in Section 5-6.
16. Close the printer and replace the locking screw.
17. Reconnect the power cable.