SATO TG308, Service Manual

Page: 213 / 252

Section 7: Replacement Procedures
TG3 Series Service Manual
Page 7-29
7.18 REPLACING JUMP HOLE SENSOR
Sensors may malfunction due to dirt buildup, but their function may be restored upon cleaning. Replace
sensors only when you are sure they have failed electrically.
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.
3.
Detach the
Operator Panel assembly
based on
step 2
and
step 3
of
Section 7.15 Replacing Operator
Panel PCB
.
4.
Press the purple
Lid Latch Lever
to release the
Lid Latch
.
To replace Jump hole sensor (upper) board
5.
On the side of the
Lid Latch assembly
(4), unscrew two
screws
(1) to remove the
Plate (F/R position)
(2) that holds the
Lid Latch
. Remove the
plastic roller
(3) attached to the
shaft
and set side.
6.
On the mechanism side of the printer, disconnect the
wiring harnesses
attached to the
Lid Latch assem-
bly
(4). Then, slide out the
Lid Latch assembly
(4) from the Shaft (Lid Latch) on the other side.
7.
Remove four
screws
(5) on both sides of the
Lid Latch assembly
(4) and remove the
Feed Cover ASSY
(6).
8.
On the
Feed Cover (Bottom)
(7), remove the
Tight screw
(8) securing the
Upper Jump hole sensor
board
(9).
9.
Replace the defective
Upper Jump hole sensor board
(9) and reverse the above procedures for reas-
sembly.
Note:
Insert the
wiring harnesses
firmly and arrange the
wiring harnesses
to ensure that they are not
pinched during installation.
4
1
5
2
3
Shaft
Spring
6
8
9
7
8
9