Sharp UP-800 (serv.man17) Service Manual ▷ View online
3-4
LT-1320CS
2
q Use a tool such as a pair of tweezers and
remove the pawls of the gear cover from
square cutouts A (2 locations) on the rear
side of the frame.
w Remove the pawls from square cutout B on
the frame and square cutout C on the paper
sensor guide, and remove the gear cover.
e Use a pair of tweezers and remove the
reduction gears in the order of 3rd gear, 2nd
gear, and 1st gear.
● Lubrication
Apply Sumitec 501 No. 1 to the teeth of all
gears, to each gear pivot, and to the section
where the 3rd reduction gear and gear cover
make contact.
q
w
e
Reduction gear
1st 2nd 3rd
Gear cover
Square cutouts A
Gear cover
Square cutout B
Square cutout C
Gear pivot
Reduction gear
Apply Sumitec 501
No.1
No.1
Caution
Do not apply excessive force to the gear cover pawl to prevent it from breaking off.
3-5
LT-1320CS
3
q Insert the tip of the tweezers into part A of the
head spring and push it in direction D until coil
part B becomes disengaged from groove G.
w While doing this, use your hand to prevent the
head spring from becoming dislodged from
the frame.
● Lubrication
Apply Epnoc AP-1 to the contact section of
head spring and thermal head unit.
● Attaching the head spring
1) Insert tip I of the head spring into square cutout
J on the frame [Fig. (1)].
2) Grasp part A of the head spring with the radio
pliers and push part K of the head spring with
your finger [Fig. (2)].
3) While pushing coil part B into groove C, use
the radio pliers to seat tip L of the head spring
in the groove M [Fig. (3)].
- Make sure that head spring tip I has not become
disengaged from square cutout J on the frame.
4) Push part A of the head spring under frame part
N, using the radio pliers [Fig. (4)].
5) Push coil part E into groove G, using radio
pliers [Fig. (5)].
q
Head spring
Epinoc AP-1
D
(1)
(2)
(3)
(4)
Part N
(5)
Groove G
w
Tip I
Square
cutout J
cutout J
Part A
Groove
C
Coil part B
Coil part F
H
Part E
Groove G
Part A
Part K
Groove
M
Groove
C
Coil part B
Tip L
Part A
Coil part F
3-6
LT-1320CS
5
q Pull up the right side of the thermal print head
unit in direction A.
w While tilting the thermal print head unit in
direction B, pull it out in direction C.
e Remove the screw (M2.0x3) and remove the
earth wire from the thermal head unit.
r Verify the head bushing R/L mounting
orientation.
t Remove head bushing L and head bushing R
from the thermal print head unit.
● Lubrication
- Apply Sumitec 501 No. 1 to the section where
the thermal print head unit contacts the frame.
- Apply Sumitec 501 No. 1 to the section where
the head bushing L and head bushing R contact
Sumitec 501 No. 1
(outer circumference)
Sumitec
501 No. 1
(bothsides)
4
q Turn the head up lever until the shaft hole and
the protrusion on the head bushing L are
matched.
matched.
w Remove the head up lever.
● Lubrication
Apply Sumitec 501 No. 1 to the protrusion on
the frame contacted by the head up lever cam.
● Mounting head bushing L
Align the top/bottom orientation of the stepped
sections according to the paper specification
and attach the head bushing [Fig. (1)].
● Mounting head bushing R
Align the top/bottom orientation of the cutouts
on the external circumference according to the
paper specification and attach the head bushing
[Fig. (2)].
● Mounting the thermal print head unit
Verify that protrusion G on the thermal print
head unit is engaged in square cutout H on the
frame [Figs. q,w].
q
w
A
q w
Sumitec 501 No. 1
Head bushing L
orientation
(2)
(1)
Head bushing R
orientation
e r t
Protrusion G
B
C
Protrusion G
Thermal print
head unit
Square cutout H
Head
bushing R
Head
bushing L
Thermal print head unit
Head bushing L
Head up lever
Earth wire
Screw
(M2.0x3)
Section 4
Parts List
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