SATO TG308, Руководство по обслуживанию

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Section 7: Replacement Procedures
Page 7-34
TG3 Series Service Manual
7.21 REPLACING RIBBON SENSOR
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
to detach the
Main (CONT) PCB bracket
from the printer frame. Refer to
Section
7.6 Replacing Torque Limiter (Ribbon Unwinder)
for details.
To replace the sensor of the ribbon unwinder
3.
From the
Ribbon unwinder assembly
which is on the top left of the mechanism as shown below, remove
the lower
screw
(1) that hold the lower
Ribbon shaft
to the
Ribbon unwinder bracket
. There is a
Ball
bearing
(2) attached to the tip of the
Ribbon shaft
, remove and set aside.
4.
Remove the
E-ring
(3) from the
Ribbon unwinder shaft
(5) and then pull out the
Ribbon unwinder shaft
(5) to remove the
Ribbon Gear_I(20)
(4).
5.
Locate the
Ribbon unwinder sensor assembly
attached to the
print frame
.
6.
Remove a
screw
(6) securing the
ribbon unwinder sensor assembly
to the print frame. Disconnect the
wiring harness
of the
Ribbon unwinder sensor
(8) from the mechanism side of the printer.
7.
Remove two
screws
(7) to detach the
Ribbon unwinder sensor
(8) from the
sensor bracket (ribbon)
(9). Replace the defective
Ribbon unwinder sensor
(8) as necessary and reverse the above procedures
for reassembly.
Note:
Insert the
wiring harness
firmly and arrange the
wiring harnesses
to ensure that they are not
pinched during installation.
8.
After replacement, check the Ribbon end sensor condition based on
Section 6.11.1 To check Ribbon
End
.
Ribbon unwinder assembly Behind the ribbon unwinder bracket
1
2
5
4
3
6
Ribbon unwinder spindle assembly
5
Ribbon unwinder
sensor assembly
7
9
7
8