SATO TG308, Руководство по обслуживанию

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Section 7: Replacement Procedures
Page 7-10
TG3 Series Service Manual
7.5 REPLACING RIBBON FEED ROLLER, ONEWAY CLUTCH AND TORQUE LIMITER (cont’d)
10.
Reverse the above procedures for reassembly.
11.
After replacement, adjust the ribbon tension according to the procedure in
Section 6.19 Adjusting Timing
Belt Tension
.
7.6 REPLACING TORQUE LIMITER (RIBBON UNWINDER)
1.
Before proceeding, switch off the printer and remove the main cover, left housing cover and the top left
housing cover to gain access to the internal (electrical and mechanism) hardware. Refer to
Section 7.1
Removal of Housing cover
for details.
2.
Unscrew five
screws
(1) to detach the
Main (CONT) PCB bracket
(2) from the printer frame.
3.
Locate the
Ribbon unwinder assembly
which is on the top left of the mechanism as shown above.
4.
Remove four
screws
(3) securing the
Ribbon unwinder bracket
(6) to the printer frame. Remove another
two
screws
(4) that hold the two
ribbon shafts
to the
ribbon unwinder bracket
(6). There are two
ball
bearings
(5) attached to the tip of the
ribbon shafts
, take note on the direction of inserting the
ball bear-
ings
to the
bracket
holes.
5.
Remove the
E-ring
(7) from the upper ribbon shaft (13) and then the
Ribbon Gear_J(50)
(8).
CAUTION:
A PROPERLY TENSIONED BELT WILL BE JUST ENOUGH TO PREVENT SLIPPAGE.
AN OVERLY TENSIONED BELT WILL EXCESSIVELY INCREASE DRAG ON THEIR
PULLEYS AND INCREASE COMPONENT WEAR.
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