Sharp FO-1850, Service Manual

Page: 40 / 120

4 Head frame and thermal head
a. Remove the bottom plate ass’y from the mechanism unit
according to procedure 1-a.
b. Remove the top cover and paper out guide unit from the
mechanism unit according to procedure 2-b.
c. Remove the paper out guide and head frame unit from
the paper out guide unit according to the 3-c.
d. Remove the head frame and thermal head from the head
frame unit according to the flowchart.
Parts list (Fig. 4)
No. Part name Q’ty No. Part name Q’ty
1 Head frame unit 1 13 Head support spring 1
2 Screw (3
×
8) 1 14 Head spring F 2
3 Earth cable 1 15 Head spring K 2
4 Head frame cover 1 16 Head spring B 1
5 Lock lever spring, left 1 17 Head frame 1
6 Lock lever, left 1 18 Connector 1
7 Lock lever spring, right 1 19 Screw (2.6
×
6) 2
8 Lock lever, right 1 20 Film guide plate 1
9 Connector 1 21 Head guide, right 1
10 Ink switch 1 22 Head guide, left 1
11 Screw (3
×
5) 1 23 Head guide sheet 1
12 Thermal head unit 1 24 Thermal head 1
2
3
11
5
6
5 7
4
10
9
8
7
23
19
21
25
18
19
22
24
12
13
15
16
14
17
1
4
1
4
1
1
2
4
3
7
9
10
11
8
5
6
12
14
15
13
24
19
20
21
22
23
18
OK NG
Rib Rib
OK
OK
NG
4
1
,
16
14
15
17
20
Fig. 4
FO-1850TH
3 – 7