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•

This chapter mainly outlines the procedure for disassembling the
printer. It is advisable to reinstall the printer in the reverse order
from disassembly, referring to "Cautions to be taken when install-
ing." 

•

Some easy steps have been omitted.

•

Only part names are described without indicating their part codes.
For the part codes, refer to the Parts Guide.

1) The parts which need to be greased are indicated in "Cautions to

be taken when reinstalling." Whenever such a part is replaced
with a new one, grease it before installing. 

Lubrication interval (rough guide)

•

Every 6 months

•

Every 2 years or 2,000,000 lines of printing

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Parts code of lubricant

Lubricant type

PARTS CODE

PRICE RANK

G36

00BB703600001

AU

2) Use caution not to have the gear chipped or deformed when

removing or reinstalling.

3) Do not touch directly the printing head.

4) Be sure to wear an earth band to ground your body.

Fig. 1

No.

PARTS NAME

Q’ty

A/C unit

1

Connector cable

1

PWB unit

1

Ground wire

1

Head frame

1

Housing PR58H

1

Screw (M3 x 5 Black)

1

1) Remove the connector cable 

 from the 4-pin connector CON4

of the PWB unit 

.

2) Remove the screw 

. Remove the ground wire 

 from the

Head frame 

.

3) Remove the A/C unit 

 from the housing PR58H 

.

Fig. 2

No.

PARTS NAME

Q’ty

Housing PR58H

1

PR58H gear cover

1

SCREW (M3 

×

 5 Black)

1

PT-COVER

1

1) Remove the PR58H gear cover 

Using a screwdriver, raise the two tabs of the PR58H gear cover

 and remove the PR58H gear cover 

 from the housing

PR58H  .

Fig. 3

2) Remove the SCREWs 

. Remove the PT-COVER 

.

Insert a flat-bladed screwdriver into the slit shown in the fig-
ure below.
Apply force into the direction indicated by the arrow, to raise
the tang and pull out the PT-COVER upward.

Fig. 4

Along the right side in the slit,
Insert a screwdriver (-) here.

PT-COVER

Fig. 5

No.

PARTS NAME

Q’ty

H-SPRING

2

HEAD UP LEVER

1

E-RING

1

SCREW (M3 

×

 6)

2

THERMAL HEAD

1

HEAD FRAME

1

Use caution not to touch the heating element of the
THERMAL HEAD 

 and PWB.

1) Remove the H-SPRINGs 

 on the right and left sides of the

printer frame.

<Note> Pinch the H-SPRING at point E with long-nose pliers

and remove it taking care not to deform the rib of the
HOUSING A.

Fig. 6

2) Remove the HEAD UP LEVER 

.

3) Remove the E-RING 

 .

4) Remove the HEAD FRAME UNIT (Part of the assembly of the

THERMAL HEAD

 and HEAD FRAME 

).

<Note> Use caution not to damage or deform the HEAD

FRAME UNIT by inadvertently hitting them with the
ROLLERs and gears.

5) Remove the two SCREWs 

 and remove the THERMAL HEAD

 from the HEAD FRAME 

.

Apply grease on the two mounting areas 

 of the HEAD FRAME 

.

H-spring

Pinch here with long-nose pliers.

1. Adjusting the HEAD position

Whenever the THERMAL HEAD 

 is replaced with a new one,

adjust its position for the HEAD FRAME 

.

•

Procedure:

1) The screw hole for fixing the THERMAL HEAD 

 in the

HEAD FRAME 

 is made a slot as shown in the figure

below. First, align the screw hole in the THERMAL HEAD

 with the bottom area of the slot and temporarily secure

it with the SCREW 

.

2) Install the HEAD FRAME UNIT 

 on the HOUSING 

.

3) Adjust the HEAD position and make sure that heating

element of the HEAD 

 is most properly positioned, by

performing a printing test. Do not adjust the Head position
during printing; otherwise the HEAD might break down
due to friction.

<Procedure for adjusting HEAD position>

(1) Insert a flat-bladed screwdriver into the adjustment

hole C in the HEAD FRAME 

. Adjust the HEAD

upward little by little with the screwdriver until it
reaches the desired position, and secure it with the
SCREW 

 (tightening torque: 6.5 kgf-cm).

4) If there is a difference in darkness in print between the

receipt and journal, insert the angle A’s spacer into the
gap between the HEAD FRAME unit and the thermal
head as shown in the figure below.

2. Direction of H-SPRING 

Install the H-SPRINGs 

 so that the hooks point outward.

Fig. 7

3. HEAD cable

Install the 9-pin connector to the right end of the THERMAL
HEAD   and the 10-pin connector to the left end.
Use caution to make a good connection or a deformed connec-
tor  when connecting the THERMAL HEAD 

 and HEAD ca-

bles.

Fig. 8

4. Installing HEAD UP LEVER and H-SPRING ("J" side)

1)

2)

3)

Fig. 9

HEAD FRAME unit

The number of pins on the
PWB unit:10P

The number of pins on the
PWB unit:9P

H-SPRING ("J" side)