Konica Minolta PK-120A, PK-120 User Manual

SERVICE MANUAL

Models

PK-120/PK-120A

JANUARY 2004

CSM-PK120

KONICA MINOLTA BUSINESS SOLUTIONS U.S.A., INC.

PK-120/PK-120A

SERVICE MANUAL

JANUARY 2004

Used on Konica Models

FORCE 65/7155/7165/7255/7272

IMPORTANT NOTICE

Because of the possible hazards to an inexperienced
person servicing this equipment, as well as the risk of
damage to the equipment, Konica Minolta Business
Solutions U.S.A., Inc. strongly recommends that all
servicing be performed by Konica-trained service tech­nicians only.

Changes may have been made to this equipment to
improve its performance after this service manual was
printed. Accordingly, Konica Minolta Business Solu­tions U.S.A., Inc., makes no representations or war­ranties, either expressed or implied, that the informa­tion contained in this service manual is complete or
accurate. It is understood that the user of this manual
must assume all risks or personal injury and/or dam­age to the equipment while servicing the equipment for
which this service manual is intended.

Corporate Publishing Department

© 2004, KONICA MINOLTA BUSINESS SOLUTIONS U.S.A., INC.

All rights reserved.

Printed in U.S.A.

CONTENTS

CONTENTS

SAFETY AND IMPORTANT WARNING ITEMS

Refer to the 7155/7165/7255/7272 Service Manual

1. OUTLINE

PK-120 PRODUCT SPECIFICATIONS .....................1-1

CENTER CROSS-SECTIONAL VIEW ......................1-2

DRIVE SYSTEM DIAGRAM ......................................1-3

[1] Punch section.............................................1-3

[2] Moving section ...........................................1-3

PUNCHING PROCESS .............................................1-4

[1] Movement of the standby position of

the punch unit.............................................1-5

[2] Formation of a Registration Loop ...............1-5

[3] Correction of the punch position.................1-6

[4] Punch .........................................................1-6

2. UNIT EXPLANATION

PUNCH SECTION .....................................................2-1

[1] Composition ...............................................2-1

[2] Mechanisms ...............................................2-1

[3] Punch Control.............................................2-2

PUNCH SCRAPS BOX SECTION.............................2-4

[1] Composition ...............................................2-4

[2] Mechanisms ...............................................2-4

[3] Punch Scraps Conveyance Control ...........2-5

3. DISASSEMBLY/ASSEMBLY

PUNCH SECTION .....................................................3-1

[1] Replacing the Punch unit ...........................3-1

[2] Cleaning the Punch Edges and Punch

Scraps Full PS (PS802) .............................3-2

Blank page

SAFETY WARNINGS

[1] Modifications Not Authorized by

Konica Minolta

Konica Minolta equipment is renowned for their high
reliability. This reliability is achieved through high-quality
design and a solid service network.

Unauthorized modifications involve a high risk of degrad­ing performance and safety. Such modifications are there­fore strictly prohibited. The points listed below are not
exhaustive, but they illustrate the reasoning behind this
policy.

PROHIBITED ACTIONS :

(1) Using extension cables or a different power cord

than specified by Konica Minolta.

(2) Using other fuses than specified by Konica

Minolta. Safety will not be assured, leading to a
risk of fire and injury.

(3) Disabling fuses or bridging fuse terminals with

wire, metal clips, solder or similar. (This applies

also to thermal fuses.)
(4) Removing air filters (except for replacement).
(5) Disabling relay functions (such as wedging pa-

per between relay contacts, etc.).
(6) Disabling safety functions (interlocks, safety cir-

cuits, etc.). Safety will not be assured, leading to

a risk of fire and injury.
(7) Performing actions to equipment not described

in the instruction manual or the service hand-

book.
(8) Using parts other than specified by Konica

Minolta.

[2] Checkpoints When Performing On-

site Service

Konica Minolta equipment is extensively tested before
shipping, to ensure that all applicable safety standards
are met, in order to protect the customer and customer
engineer from the risk of injury. However, in daily use, any
electrical equipment may be subject to parts wear and
eventual failure. In order to maintain safety and reliability,
the customer engineer must perform regular safety checks.

(3) Be sure to disconnect the power cord of the

equipment from the AC outlet.
Simply turning off the power switch is not suffi­cient, because paper feed units or other electri­cal equipment may be powered also when the
power switch is turned off.

(4) Proceed with special care when performing op-

eration checks or adjustment while the unit is
powered. When carrying out operation checks or
adjustment while external covers are removed,
the risk of electrical shock exists when touching
parts which carry high voltage or electrical charge.
The risk of injury exists when touching moving
parts such as gears or chains.

2. Safety Checkpoints

The following list is not exhaustive, but it includes actions
which must be carried out at every on-site service.

CAUTION:

(1) Check external covers and the frame for sharp

edges, burrs, or nicks.

(2) Check external covers and hinges for loosening

or damage.
(3) Check wiring for squeezing or damage.
(4) Check power cord for insulation problems (con-

ductor must not be exposed).
(5) Check power cord and cable ties etc. for loosen-

ing from frame.

WARNING:

(1) Verify that the equipment is properly grounded. If

a problem is detected, establish a proper ground

connection.
(2) Connecting the ground lead to an improper point

such as listed below results in a risk of explosion

and electric shock.

Unsuitable ground points:

- Gas pipe

- Lightning rod

- Telephone line ground

- Plastic water pipe or water pipe or faucet that
has not been approved by authorities for
grounding use

1. Advance Preparation for Safety Checks

CAUTION:

(1) Wear clothing that facilitates work and is de-

signed for safety.

(2) Carry out all procedures carefully to prevent in-

jury.

3. Description of Safety Checks

CAUTION:

(1) Before performing safety check work, read all

relevant documentation (service handbook, tech­nical notices, etc.) and proceed according to the
prescribed procedure, using only the prescribed
tools. Do not carry out any adjustments not
described in the documentation.

(2) If the power cord is damaged, replace it only with

the specified power cord. If the power cord insu­lation has been damaged and there are exposed
sections, short- circuits and overheating may
occur, leading to a serious fire risk.

(3) Do not route the power cord so that it can be

stepped on or pinched. Otherwise overheating
may occur, leading to a serious fire risk.

(4) When disconnecting any cables, always grasp

the connector and not the cable (especially in the
case of AC and high-voltage leads).

(5) Carefully remove all toner remnants from electri-

cal parts, electrodes, etc.

(6) Make sure that wiring cannot come into contact

with sharp edges, burrs, or other pointed parts.

(7) Double-check to make sure that all screws, com-

ponents, wiring, connectors, etc. that were re­moved for safety check maintenance have been
reinstalled in the original location. (Pay special
attention to forgotten connectors, pinched cables,
forgotten screws, etc.)

(8) When installation and preventive maintenance,

verify that the power cord has been securely
plugged into the AC outlet. Contact problems
may lead to increased resistance, overheating,
and the risk of fire.

WARNING:

Before disassembling or adjusting the equip­ment, make sure that the power cord has been
disconnected.

[4] Measures to Take in Case of an

Accident

(1) If an accident has occurred, the distributor who has

been notified first must immediately take emergency
measures to provide relief to affected persons and to
prevent further damage.

(2) If a report of a serious accident has been received

from a customer, an on-site evaluation must be
carried out quickly and Konica Minolta must be
notified.

(3) To determine the cause of the accident, conditions

and materials must be recorded through direct on­site checks, in accordance with instructions issued
by Konica Minolta.

(4) For reports and measures concerning accidents,

consult your superior, and follow the regulations set
in "Standards for the Control Program for Measures
Against Electrical Equipment Accidents".

[5] Conclusion

(1) Safety of users and customer engineers depends

highly on accurate maintenance and administration.
Therefore, safety can be maintained by the appropri­ate by the proper daily service work conducted by the
customer engineer.

(2) When performing service, equipment on the site

must be tested for safety. The customer engineer
must verify the safety of parts and ensure appropri­ate management of the equipment.

[3]

Handling of Materials for Servicing

CAUTION: Alcohol-based and acetone- based

cleaners are highly flammable and
must be handled with care. When
using these materials for cleaning
parts, observe the following precau-

tions.
(1) Disconnect the power cord from the AC outlet.
(2) Use only a small amount of cleaner at a time and

take care not to spill any liquid. If this happens,
immediately wipe it off.

(3) Perform cleaning only in an environment where

sufficient ventilation is assured. Breathing large
quantities of organic solvents can lead to dis­comfort.

(4) Do not replace the cover or turn the unit on before

any solvent remnants on the cleaned parts have
fully evaporated.

1

OUTLINE

Blank page

PK-120 PRODUCT SPECIFICATIONS

PK-120

[1] Type

Type:

Self-contained puncher

[2] Functions

Punching method:

Reciprocating type punching

Number of holes:

3 holes (for inch area) or 4 holes (for metric
area) *1

Hole diameter:

φ6.5 mm (2 holes / 4 holes)
φ8.0 mm (3 holes)

Hole pitch:

80 mm (2 holes / 4 holes)
108 mm (3 holes)

Hole positions

<2 holes>

10.5 mm (adjustable)

80 mm
(not
adjustable)

Longitudinal positions
of holes: Paper center
(adjustable)

[3] Applicable Paper

Non-Punch mode:

Same as main body

Punch mode:

• Metric area (4 holes)
A3 / B4 / A4 / B5
11 x 17 / 8.5 x 11

• Inch area (3 holes)
11 x 17 / 8.5 x 11
A3 / B4 / A4 / B5

• Punch mode with A5R or 5.5 x 8.5R size
paper cannot be used together with the sta­pling mode.

• High quality paper of 64g/m
16lbs to 24lbs

Punch mode cannot be used together with the
folding mode, stitch-and-fold mode, or three­folding mode.

Prohibition paper from punching:

OHP film, Label paper, Blue print master,
Binding-holed paper, Ta bs

Amount of paper curl:

Max. 10mm for 5 sheets of copied paper in
piles

2

to 128g/m2 or

<3 holes>

9.5 mm (adjustable)

Longitudinal positions
of holes: Paper center
(adjustable)

108 mm
(not
adjustable)

<4 holes>

10.5 mm (adjustable)

Longitudinal positions

80 mm
(not
adjustable)

of holes: Paper center
(adjustable)

*1: The 2 holes type is used in Japan. There are

three types of PK-120: 2 holes, 3 holes and
4 holes types. All the three types can be pur­chased as product.

Amount of curl

Copied paper (5 sheets)

[4] Particulars of Machine

Power source:

DC24V, DC5V (supplied from FNS)

Maximum power consumption:

40VA

Machine dimensions:

5.1(W) x 18.5(D) x 4.2(H) (in)

Weight:

Approximately 6.6 lbs

[5] Maintenance

Maintenance:

Same as the main body.

[6] Operating environment

Temperature: 10°C to 30°C (50°F to 86°F)
Humidity: 10% to 80% RH

Note: The information herein may be subject to

change for improvement without notice.

1-1

PK-120

CENTER CROSS-SECTIONAL VIEW

Shift roller

Conveyance roller / B

Intermediate conveyance roller

Stacker entrance roller

Punch section

Entrance roller

(Main body)

Conveyance roller / A

Punch scraps box

1-2

DRIVE SYSTEM DIAGRAM

[1] Punch section

Punch motor (M801)

Punch edge

PK-120

Eccentric cam

Drive arm

[2] Moving section

Rack

Belt

Punch shift motor (M802)

FRONT

Punch unit

Guide shafts

1-3

PK-120

PUNCHING PROCESS

PK consists of the following sections:

Shift roller

Conveyance roller / B

Intermediate conveyance roller

Stacker entrance roller

Note: The punching process differs between

the punch mode (holes are made) and
non-punch mode (no holes are made).
Either of these modes can be selected on

the operation panel of the main body.
The following flowchart shows the flow of opera­tions performed by the above sections. These
operations are explained according to this flow­chart.

Punch section

Entrance roller

(Main body)

Conveyance roller / A

Punch scraps box

Start

Movement of the standby position of the punch unit

Formation of a Registration Loop

Correction of the punch position

Punch

1-4

PK-120

[1] Movement of the standby position of

the punch unit

When the punch mode is selected, the punch
shift motor (M802) runs to move the punch unit
so that the paper edge sensor mounted on the
punch unit is placed inside of the side edge of
paper by 5mm. However, if the paper size is

8.5×11, 8.5×14, or 5.5×8.5R, the sensor is posi­tioned by 10mm inside.
The above operation is not generally performed
in the non-punch mode, however, for the paper
sizes shown below, the punch unit is moved to
the position located inside of the side edge of
paper by 10mm in order to secure the easy feed­ing of paper when conveyed.
2 holes/4 holes machines:
B6 / 16K
3 holes machine:

8.5×11 / 8.5×14 / 5.5×8.5R / A5R / A4

Rack

Punch unit

[2] Formation of a Registration Loop

The FNS conveyance motor (M701) turns OFF
temporarily to stop conveyance of paper when
the specified time has passed since paper exit
PS (PS37) detected the leading edge of the
paper. Thus the paper is pressed against the
entrance roller forming a loop to correct the
bend. When the specified time has passed,
M7 01 tur ns ON to restart conveying the paper.
The above operation is not performed when con­veying a large paper (220 mm and longer in
direction of conveyance) and in the non-punch­ing mode.
When punching the paper conveyed from PI, the
loop is formed on the PI's side. For details, refer
to PI-110 SHB.

(Main body)

Entrance
roller

Belt

Punch shift motor (M802)

FRONT

Punch unit

Punch edge

Direction of paper conveyance

Loop

Guide shafts

Paper edge sensor

5mm

or

10mm

Paper

1-5

PK-120

[3] Correction of the punch position

The punch unit positioned inside of the side edge
of paper by 5mm or 10mm performs the following
procedures to correct the punch position so that
the punch is always centered on the paper. The
punch position is corrected by moving the punch
unit to and fro during conveyance of the paper.

• When FNS entrance PS (PS704) detects the

leading edge of the paper, the punch unit is
moved backward temporarily until the paper
edge sensor detects the side edge of the
paper. If punching is performed for the paper
conveyed from PI, the time when PI passage
PS/U (PS201) or PI passage PS/L (PS206)
detects the leading edge of the paper becomes
the starting point.

• Subsequently, the punch unit moves back

frontward until the paper edge sensor re­detects the side edge of the paper (Detection
of side edge reference position).

• When the side edge reference position is

detected, the punch unit is again moved to
position the center of punch edges to the cen­ter of the paper. The distance and direction of
this movement differ from paper sizes. Only
when moving backward, the punch unit makes
a stop at the side edge reference position.

[4] Punch

In the punch mode, the FNS conveyance motor
(M701) turns OFF to stop the paper conveyance
temporarily when the specified time has passed
since the FNS entrance PS (PS704) detected
the trailing edge of the paper, and holes are
punched.
During punching, the drive force of the punch
motor (M801) is transferred to the shaft to rotate
the shaft once. As the shaft rotates, the eccentric
cams at both ends of the shaft rotate to lower the
punch edges, making holes in the paper.
After the punch is finished, the punch unit moves
to the side edge reference position when the
specified time has passed since the trailing edge
of the paper is detected by PS704, which makes
a standby status for the punch process for the fol­lowing paper.

Eccentric cam

Shaft

Punch motor
(M801)

Punch edges

Eccentric cam

Punch unit

Punch edge

Front Back

Moving direction
of punch unit

Direction of paper
conveyance

Paper center

Paper edge sensor

Center of
punch edges

Paper

5mm

or

10mm

FRONT

Punch HP PS (PS801)

Top position (HP) Bottom position

Eccentric cam

Drive arm

Punch
edges

Paper

1-6

2

UNIT EXPLANATION

Blank page

PUNCH SECTION

[1] Composition

PK-120

Guide shafts

Eccentric cam

Punch motor (M801)

Punch scraps box set PS (PS804)

Drive arm

[2] Mechanisms

Mechanism Method

Back-and-forth move­ment of punch unit

Punch unit movement Punch shift motor

Punch motor (M801)
Eccentric cam
Drive arms
Punch edges

(M802)
Concurrent use of
Gear / Rack

Punch scraps full PS (PS802)

Punch edges
(Japanese specification has
inside 2 edges only.)

Punch HP PS (PS801)

Punch shift motor (M802)

Eccentric cam

Drive arm

Punch shift
HP PS (PS803)

FRONT

2-1

PK-120

[3] Punch Control

M801 CONT

M801 F/R

PS801

OUT-1

OUT-2

OUT-3

OUT-4

OUT-5

OUT-6

OUT-7

OUT-8

OUT-9

OUT-10

SIG_1

SIG_2

SIG_3

SIG_4

SIG_5

SIG_6

SIG_7

SIG_8

SIG_9

SIG_10

PKSET

PKSET2

5V

SG

24V

PG

PKDBFNS CB

The movement of the punch unit is driven by
M802 (punch shift) and the punching operation is
driven by M801 (punch). M801 is DC motor, and
rotates once per punch. Related signals are
PS801 (punch HP), PS803 (punch shift HP), and
PAPER EDGE SENSOR.

1. Operation

The punching operation can be divided into the
movement of the punch unit and the punch
movement that makes holes. In the punch mode,
these movements are performed for every sheet
of paper, while in the non-punch mode these are
not performed. However, the movement of the
punch unit is performed for some paper sizes
even in the non-punch mode.

a. Searching the standby home position of the

punch unit

With power turned ON, M802 (punch shift) runs
to move the punch unit to the position where
PS803 (punch shift HP) is turned ON, which
makes a standby state. This position becomes
the standby home position of the punch unit.

24V

24V

M802 DRVA

M802 DRVA

M802 DRVB

M802 DRVB

PS803 5V

PS803 IN

PS803 SG

IN1

IN2

IN3

IN4

IN5

SG

M801 DRV1

M801 DRV2

PS801 5V

PS801 IN

PS801 SG

M802

PS803

5V

PAPER

EDGE

SENSOR

M801

PS801

b. Moving the standby position of the punch

unit

When the punch mode is selected, M802 (punch
shift) runs to move the punch unit so that the
paper edge sensor mounted on the punch unit is
located inside of the side edge of paper by 5mm.
However, if the paper size is 8.5×11, 8.5×14, or

5.5×8.5R, the sensor is positioned by 10mm
inside. Either of these positions becomes the
standby position in the punch mode.
The above operation is not generally performed
in the non-punch mode, however, for the paper
sizes shown below, the punch unit is moved to
the position located inside of the side edge of
paper by 10mm in order to secure the easy feed­ing of paper when conveyed.
2 holes / 4 holes machines:
B6 / 16K
3 holes machine:

8.5×11 / 8.5×14 / 5.5×8.5R / A5R / A4

c. Detecting the side edge reference position

When FNS entrance PS (PS704) detects the
leading edge of paper, M802 (punch shift) runs
again to move the punch unit backward tempo­rarily until the paper edge sensor detects the side
edge of the paper. If punching is performed for
the paper conveyed from PI, the time when
PS201 (PI passage/U) or PS206 (PI passage/L)
detects the leading edge of the paper is the start­ing point.
Subsequently, M802 runs inversely to move the
punch unit frontward until the paper edge sensor
re-detects the side edge of the paper. This p osi­tion becomes the side edge reference position.

d. Moving the punch position

When the side edge reference position is
detected, M802 (punch shift) moves the punch
unit again so that the center of punch edges is
positioned to the center of paper. The distance
and direction of this movement differ from paper
sizes. Only when moving backward, the punch
unit makes a stop at the side edge reference
position. The direction of the movement from the
side edge reference position to the punch posi­tion classified by paper sizes is as follows:
Frontward:
A5 / A5R / B5R / A4 / A4R / B4 / A3 / 8.5×11 /

8.5×14 / 5.5×8.5 / 5.5×8.5R / 8K / 16K / 16KR
Backward:
B5 / F4 / 8.5×11R / 11×17

2-2

PK-120

The series of movement from "c. Detecting the
side edge reference position" to "d. Moving the
punch position" are performed per each paper,
and these movements correct the punch posi­tion.

e. Forming a registration loop

M701 (FNS conveyance) turns OFF temporarily
a specified time after PS37 (paper exit) detects
the leading edge of the paper to form a loop at the
entrance roller. If punching is performed for the
paper conveyed from PI, the loop will be formed
on the PI's side.

f. Punch movement

When FNS entrance PS (PS704) detects the
trailing edge of the paper, M801 (punch) runs
and performs the punch movement. For some
paper sizes, the punch movement is executed
before completing the correction of the punch
position for the punch unit. To avoid this, switch
the conveyance speed on FNS to a low speed
only for such paper size.

Paper size Conveyance speed
A5 / 5.5×8.5R 345mm/s

Other sizes 670mm/s
If punching is performed for the paper conveyed
from PI, the time when the trailing edge of the
paper is detected by PS206 (PI passage/L) is the
starting point.

g. Paper edge sensor

To detect the side edge of the paper, the paper
edge sensor mounted on the punch unit is used.
The paper edge sensor consists of 5 sensors
shown in the below figure. Which sensor is used
depends on the paper sizes.

Paper edge sensor

2. Signals

a. Input signals

(1) PS801 IN (PS801 to PKDB)

Punch drive HP detection signal
[L]: Other than HP
[H]: HP

(2) PS803 IN (PS803 to PKDB)

Punch unit HP detection signal
[L]: Other than HP
[H]: HP

(3) IN1 to 5 (PAPER EDGE SENSOR to PKDB)

• IN1 to 5 (Paper edge sensors)
[L]: Without paper
[H]: With paper

(4) M801 CONT (FNS CB to PKDB)

ON/OFF control signal for M801 (punch)
[L]: M801 ON
[H]: M801 OFF

(5) M801 F/R (FNS CB to PKDB)

Signal for switching the direction of rotation for
M801 (punch)
[L]: Forward direction
[H]: Reverse direction

(6) SIG_1 to 10 (FNS CB to PKDB)

PK control signal from FNS CB

b. Output signals

(1) M801 DRV 1, 2 (PKDB to M801)

Drive signal for M801 (punch)

(2) M802 DRVA, A, B, B (PKDB to M802)

Drive signal for M802 (punch shift) (A phase, B
phase)

(3) PKSET, PKSET2 (PKDB to FNS CB)

Connection signal of PK
[L]: Connected
[H]: Not connected

(4) OUT-1 to 10 (PKDB to FNS CB)

Status informing signal from PK to FNS CB

Direction of paper
conveyance

2-3

PK-120

PUNCH SCRAPS BOX SECTION

[1] Composition

Punch unit

Punch scraps full PS (PS802)

Punch scraps box

[2] Mechanisms

Mechanism Method

Alarm clear *1 Punch scraps box

*1: Alarm clear

Punch scraps are collected in the punch
scraps box.
When the punch scraps box is full or it is
removed, the related message appears on
the operation panel of the main body.
To remove the punch scraps box, open the
front door of the FNS and pull forward.

Punch scraps box set PS (PS804)

Punch scraps box

2-4

PK-120

[3] Punch Scraps Conveyance Control

5V

5V

5V

5V

SG

SG

PS802 IN

PS804 IN

SG

SG

PS802 5V

PS802 IN

PS802 SG

PS804 5V

PS804 IN

PS804 SG

PKDBFNS CB

PS802

PS804

PS802 IN

PS804 IN

Punch scraps are collected in the punch scraps
box.
Related signals are PS802 (punch scraps full)
and PS804 (punch scraps box set).

1. Operation

a. Punch scraps full detection

PS802 (punch scraps full) detects whether the
punch scraps box is full.
When the punch scraps box becomes full,
PS802 turns ON to send the "punch scraps full"
signal to the main body.
Upon receipt of this signal, the main body dis­plays a related message on the operation panel.

b. Punch scraps box detection

PS804 (punch scraps box set) detects whether
the punch scraps box is attached.
If the punch scraps box is not attached, PS804
turns OFF to send the "punch scraps box not
attached" signal to the main body.
Upon receipt of this signal, the main body dis­plays a related message on the operation panel.

2. Signals

a. Input signals

(1) PS804IN (PS804 to PKDB to FNS CB)

Punch scraps box existence detection signal
[L]: Punch scraps box is not set
[H]: Punch scraps box is set

(2) PS802IN (PS802 to PKDB to FNS CB)

Punch scraps box full detection signal
[L]: Punch scraps box is full
[H]: Punch scraps box is not full

2-5

Blank page

3

DISASSEMBLY/ASSEMBLY

This section explains how to disassemble and reassemble the machine.
When disassembling and reassembling the machine, follow the precau­tions given below.

1. Be sure the power cord has been unplugged from the wall outlet.

2. The disassembled parts must be reassembled following the disas­sembly procedure in reverse unless otherwise specified.

3. Care should be taken not to lose small parts. Care should also be
taken not to install small parts in wrong places.

4. Do not operate the machine before installing all the disassembled
parts completely.

5. Removal of some screws is prohibited in this section. Never loosen
them.

PUNCH SECTION

PK-120

Caution: The following screws should not be

removed. If you do, punching cannot
be done as designed.

Punch unit

Screws that should
not be removed

(2) Remove the punch drive board cover by remov-

ing one screw.

Punch drive board cover

Screw

(3) Disconnect two connectors (CN65, 68) and one

relay connector (CN531) from the punch drive
board (PKDB).

Connector (CN65)

Relay connector (CN531)

[1] Replacing the Punch unit

Caution:Be sure to unplug the power

cord of the main body from the
wall outlet.

a. Procedure

(1) Remove the punch scraps box.

Punch scraps box

Punch drive board (PKDB)

Connector (CN68)

3-1

PK-120

(4) Remove three screws to remove the punch unit

cover.

Punch unit cover

Screw

(5) Disconnect two connectors (CN158, 505).
(6) Remove the punch unit from FNS by removing

four screws.

Punch unit

Screw

Connector (CN505)

Screw

[2] Cleaning the Punch Edges and Punch

Scraps Full PS (PS802)

Caution:Be sure to unplug the power

cord of the main body from the
wall outlet.

a. Procedure

(1) Remove the punch unit.
(2) Use a blower brush to remove paper dust and

punch scraps from the punch edges and punch
scraps full PS (PS802).

Punch scraps full PS (PS802)

Punch edges

(3) Reinstall the above parts following the removal

steps in reverse.

Punch shift HP PS
(PS803)

Screw

Connector (CN158)

Punch shift motor
(M802)

(7) Reinstall the above parts following the removal

steps in reverse.

3-2