Konica AFR-12 Service Manual

AFR-12/AF-5

SERVICE MANUAL

GENERAL/MECHANICAL/

ELECTRICAL

Table Of Contents-1 AFR-12/AF-5Rev. 1.0/05.99

1GENERAL/MECHANICAL/ELECTRICAL

1.1 Specifications - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 1

1.2 Components Identification- - - - - - - - - - - - - - - - - - - - 4

1.3 Cross-sectional View- - - - - - - - - - - - - - - - - - - - - - - - 6

1.4 Driv e System - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 8

1.5 Electrical Component Layout- - - - - - - - - - - - - - - - - - 9

1.6 Description Of Modes - - - - - - - - - - - - - - - - - - - - - - 1 0

1.6.1 Mixed Original Mode- - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10

1.6.2 1-Sided Original Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - 10

1.6.3 2-Sided Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10

1.6.4 2-in-1 Mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10

1.6.5 S-ADF (Single Feed) Mode - - - - - - - - - - - - - - - - - - - - - - - - 10

1.6.6 Thin Mode (As set by "Ori ginal Thickness" of User’s Mode) - 11

1.7 Document Take-up/feeding Mechanism - - - - - - - - - 12

1.7.1 Construction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 12

1.7.2 Document Pick-Up Mechanism - - - - - - - - - - - - - - - - - - - - -13

1.7.3 Document Tak e- U p Mec hanism- - - - - - - - - - - - - - - - - - - - - 14

1.7.4 Separating Mechanism - - - - - - - - - - - - - - - - - - - - - - - - - - - 16

1.7.5 Single Feed Mechanism - - - - - - - - - - - - - - - - - - - - - - - - - - 17

1.8 Document Transport Mechanism- - - - - - - - - - - - - - 18

1.8.1 Construction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 18

1.8.2 Document Transpo rt Mechanism - - - - - - - - - - - - - - - - - - - - 18

1.8.3 Original Width Scale Retraction Mechanism - - - - - - - - - - - - 19

1.9 Turnover/Exit Mechanism - - - - - - - - - - - - - - - - - - - 20

1.9.1 Construction - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 20

1.9.2 Turnover/Exit Document Transport Mechanism- - - - - - - - - - 21

1.9.3 Turnover/Exit Switching Mechanism (AFR-12) - - - - - - - - - - 23

1.9.4 Exit Mechanism (AF-5) - - - - - - - - - - - - - - - - - - - - - - - - - - - 24

Table Of Contents-2EP1052 Rev. 1.0/05. 99

1.10 Miscell an eous - - - - - - - - - - - - - - - - - - - - - - - - - - - - 25

1.10.1 Document Size Detection Mechanism - - - - - - - - - - - - - - - - 25

1.10.2 Raised/Lowered Position Detecting Mechanism - - - - - - - - - 25

Table Of Contents-3 AFR-12/AF-5Rev. 1.0/05.99

1GENERAL/MECHANICAL/ELECTRICAL

1.1 Specifications

NAME Duplexing Document Feed er AFR-12

Document Feeder AF-5

Electrical

General/Mechanical

TYPE

● Paper Take-Up: Take-up from top of stack,

U-turn feeding

● Transpor t: Automatic single-belt trans port system

● Turnover: Loop turnover system (AFR-12)

● Ejection: U-turn ejection

INST ALLAT ION Mounted onto the copier

TYPE OF DOCUMENT

● Plain paper

● 1-Sided and Dual Original

● Scanning (2-in-1) Modes: 50 to 100 g/m²

● 2-Sided Mode: 60 to 90 g/m²

● Mixed Original Mode: 60 to 90 g/m²

● Single Feed Mode: AFR-12 · 35 to 200 g/m²,

AF-5 · 35 to 157 g/m²

DETECT ABLE
DOCUMENT SIZES

CAP ACITY

A3L, B4L, A4LC, B5LC, A5L, 11" x 17"L, 8-1/2 " x 14" L,
8-1/2" x 11"LC, 11" x 15"L, 8-1/4" x 13"L

● Document Feed Table:

A4 or smaller 50 sheets (of paper weighing 80 g/m²)
B4 or larger 30 sheets (of paper weighing 80 g/m²)

● Document Exit Table:

A4 or smaller 50 sheets (of paper weighing 80 g/m²)
B4 or larger 30 sheets (of paper weighing 80 g/m²)

ALIGNMENT Aligned along the rear Document Edge Guide

DOCUMENT LOADING Face up (Single Feed Mode-Face down)

M-1 AFR-12/AF-5Rev. 1.0/05.99

MODES ● 1-Sided Original

● 2-Sided Original

● 2-in-1

● Mixed Original

● Single Feed Mode

The "Original Thickness" function of User ’s Choice
permits selection between the plain paper and thi n
paper mode.

POWER SOURCE 24 VDC, supplied from the copier

POWER
CONSUMPTION

DIMENSIONS
<AFR-12>

WEIGHT
<AFR-12>

DIMENSIONS
<AF-5>

WEIGHT
<AF-5>

OPERA TING
ENVIRONMENT

DOCUMENTS WHICH
CANNOT BE USED

AFR-12 · 60W or less/2.5A AF-5 · 48W or less/2A

Width 627 mm
Depth 515 mm
Height 125 mm

13.0 kg

Width 604 mm
Depth 515 mm
Height 125 mm

12.0 kg or less

Same as copier

The following docum ents, if used in the AFR-12/AF-5,
are very likely to cause trouble.

Type of Document Possible Trouble

Documents stapled or clipped
together

Documents glued together Take-up failure, damaged document
Documents folded, torn, or wrinkled Take-up failure, damaged document
Documents severely curled Documents mis-fed due to being dog-eared

Take-up failure, damaged document, defective drive train due to
jammed staples or clips.

M-2AFR-12/AF-5 Rev. 1.0/05. 99

DOCUMENTS FOR
WHICH

The following documents, if used in the

AFR-12/AF-5, may or may not cause trouble.
FEEDING CANNOT BE
GUARANTEED.

Type of Document Possible Trouble

Slightly curled documents Dog-eared pages, ejection failure
Heat-sensitive paper for facsimile Crease, ejection failure
Coated documents Take-up failure
Documents with uneven surface

(letter head etc.)
Translucent paper Take-up failure, transport failure
Paper just ejected from the ADF Take-up failure, transport failure
Perforated documents (loose

leafed etc.)

Documents weighing 40 to 50 g/m² Folded leading edge, transport failure
Folded documents Transport failure, distorted image

Take-up failure

Take-up failure, transport failure

Electrical

General/Mechanical

M-3 AFR-12/AF-5Rev. 1.0/05.99

1.2 Components Identification

1

7

<AF-5> <AFR-12>

2

3

4

5

6

9

8

10

M-4AFR-12/AF-5 Rev. 1.0/05. 99

1. Hookup Cord

2. Maintenance Cover

3. T a ke -Up Co ve r

4. Single Feed Tray

5. Document Feed Table

6. Turnover Cover Release Swit ch (AFR-12)

7. Turnover Cover (AFR- 12)

8. Transport Belt

9. Magnet Catches

10.Guide Plate Release Lever (AF-5)

Electrical

General/Mechanical

M-5 AFR-12/AF-5Rev. 1.0/05.99

1.3 Cross-sectional View

19

18

<AFR-12>

1

2

3

4

5

17

16 15

21

20

22

14

13

12

<AF-5>

11

10

6

9

7

8

M-6AFR-12/AF-5 Rev. 1.0/05. 99

1. Document Detecting Sensor (S1)

2. Document Take-Up Roller

3. Document Separator Roll er

4. Registration Sensor

5. Single Feed Transpor t Roller

6. Manual Feed Take-up Sensor (PWB-D)

7. Single Feed Transpor t Roll

8. Registration Driven Roller

9. Registration Drive Roller

10.Size Sensor

11.Transport Belt Drive Roller

12.Transport Rolls

13.Transport Belt Guide Roller

14.Transport Belt Driven Roller

15. Exit Ro lle r

16.Turnover Roller

17.Turnover/Exit Sensor

18.Turnover/Exit Switching Plate

19.Exit Roll

20.Exit Transport Roll

21.Exit Sensor (S3)

22.Exit Transport Roller

Electrical

General/Mechanical

M-7 AFR-12/AF-5Rev. 1.0/05.99

1.4 Drive System

Exit Mechanism

<AF-5>

Exit Motor (M3)

Turnover/
Exit Mechanism

<AFR-12>

Turnover/Exit Motor (M3)

Take-Up/
Transport Mechanism

Take-Up Motor (M1)

Transport Motor ( M2 )

Transport Belt Drive Mech anism

M-8AFR-12/AF-5 Rev. 1.0/05. 99

1.5 Electrical Component Layout

<AFR-12>

<AF-5>

Code Name Code Name

PWB-A
PWB-B
PWB-C
PWB-D
PWB-E
M1
M2
M3
M3

Main Control Board
Registration Sensor
Size Sensor
Manual Feed Take-up Sensor
Turnover/Exit Sensor
Take-Up Mot o r
Transport Motor
Turnover/Exit Motor (AFR-12)
Exit Motor (AF-5)

SOL1
SOL2
SOL3
SOL4
S1
S2
S3
S4
MICLK

Document Stopper Solenoid
Document Pressure Solenoid
Scale Solenoid
Turnover/Exit Switching Solenoid
Document Detecting Sensor
Feed Cover Set Switch
Turnover Cover Set Switch
Exit Sensor
Document Feed Motor Pulse Sensor

Electrical

General/Mechanical

M-9 AFR-12/AF-5Rev. 1.0/05.99

1.6 Description Of Modes

1.6.1 Mixed Original Mode

● If the Mixed Orig key on the control panel is pressed when the copier is set

in 1- or 2-sided mode, or 2-in-1 mode, the copier detects the size of the
document each time a document is taken up and fed in. The copier feeds
the copy paper of a size selected from among the available paper sources
according to the document size detected.

1.6.2 1-Sided Original Mode

● When in this mode, the copier detects the size of the document which is

taken up and fed in first .

● The copier therefore needs to determine the size of the copy paper only

once based on the detec ted document size and the copying se tting made on
the control pane l. This makes for faster paper feed timing on the part of the
copier.

NOTE

If a set of documents of varying sizes are used in this mode, image trouble could
result including missing copy image. (The system does not force a misfeed
condition.)

1.6.3 2-Sided Mode

● The copier automatically turns over the 2-sided document for a speedy

copying operation (copies are made in the order of the first and second
pages).

1.6.4 2-in-1 Mode

● When in this mode, the copier positions two different documents on the

Original Glass side-by-side for making a copy of the two documents onto
one side of a single sheet of paper in a single copy run.

● If this mode is to be used for a set of documents of different widths, the

Mixed Orig key must first be pressed.

1.6.5 S-ADF (Single Feed) Mode

● When a single document is placed in the Single Feed Tray, the ADF

automatically takes it up and feeds it in to let the copier run a single copy
cycle.

NOTE

The ADF automatically takes up and feeds in documents even when two or more
documents are placed on the Single Feed Tray ; However, it could resul t in a double
feed or other faulty condition. Only one document should therefore be lo aded.

M-10AFR-12/AF-5 Rev. 1.0/05. 99

1.6.6 Thin Mode (As set by "Original Thickness" of User’s M ode)

● When in this mode, the ADF transports the document at a low speed and

stops it without l etting it hit against the Original Width Scale.

Electrical

General/Mechanical

M-11 AFR-12/AF-5Rev. 1.0/05.99

1.7 Document Take-up/feeding Mechanism

1.7.1 Construction

No. Name No. Name

1

Feed Cover Set Sensor (S2)

2

Document Pressure Pad

3

Document Feed Motor Pulse Sensor
(M1CLK)

4

Document Pressure Solenoid (SOL2)

5

Document Stopper Solenoid (SOL1)

6

Take-Up Motor (M1)

7

Transport Motor

8

Registration Sensor (PWB-B)

9

Manual Feed Take-up Sensor
(PWB-D)

10

Registration Drive Roller

11

Single Feed Transport Roller

12

Registration Driven Roller

13

Document Separator Roller

14

Document Take-Up Roller

15

Size Sens or (PWB-C)

16

Document Stopper Guide Plate

M-12AFR-12/AF-5 Rev. 1.0/05. 99

1.7.2 Document Pick-Up Mechanism

● The document pick-up mechanism consists of the Document Pressure

Pads, Document Stopper Guide Plate and Document Take-Up Roller.

● When documents are loaded on the document feed table, they are pressed

against the Document Take-Up Roller by the Document Pressure Pads,
then they are taken up by the Document Take-Up Roller one by one,
commencing with the one from the bottom of the stack.

● The Document Stopper Gu ide Pl ate det ermines t he leadi ng edge posi tio n of

the documents loaded in the ADF. It is normally in the raised position, and
is lowered at the star t of pi ck-up motion.

Electrical

General/Mechanical

SOL1/2 Control

SOL 1 and 2 are energized and de-energized by the signal output from IC3A on
PWB-A.

SOL1 IC3A-20 IC3A-21 SOL2 IC3A- 16

ON

(Stopper UP)

OFF

(Stopper DOWN)

HLONH

LHOFFL

M-13 AFR-12/AF-5Rev. 1.0/05.99

1.7.3 Document Take-Up Mechanism

● The document take-up m echanism takes up a document from the bottom of

a set of documents loaded on the Single Feed Tray and feeds it up to the
registration roller. It is drive n by the Take-Up Motor.

● The Take-Up motor (M1) rotates the Document Take-Up Roller, Document

Separator Roller and Single Feed Transport Roller via Gears, Pulleys and
Timing Belt.

M-14AFR-12/AF-5 Rev. 1.0/05. 99

M1 Control

M1 is controlled by the following output signals. M1 speed is detected by the pulse
disk mounted on the motor output shaft and Document Feed Motor Pulse Sensor
(M1 CLK). M1 pulses are applied to IC1A-74, and period A is maintained at the
same length so that the motor rotates at a constant speed.

IC3 Forward Backward

Pin 65
(MIL1)

Pin 66

(MUL2)

Pin 67
(MIHI)

Pin 68
(MIL2)

Electrical

General/Mechanical

M-15 AFR-12/AF-5Rev. 1.0/05.99

1.7.4 Separating Mechanism

● Movable Separator Guide Plates are used in the Document Separating

Mechanism. The height of the 1st and 2nd Separator Guide Plates can be
adjusted by a lever or screws, respectively.

● Lowering the Guide Plates can reduce the occurrence of Smudging on the

back of documents and smearing of the document image by reducing the
number of documents delivered of the Separator Roller.

NOTE

Both 1st an d 2n d Sep arator Guide Pla tes ha ve b een set i n the rais ed p ositi on at the
time of shipment from the factory.

● The Separator Pad is design ed t o be pr esse d aga inst the Sepa rator Rolle rs.

This ensures t hat documents ar e transport ed one by one even i f two or more
documents are fed fr om the Take-Up Roller.

M-16AFR-12/AF-5 Rev. 1.0/05. 99

1.7.5 Sing le Feed M e chanis m

● The single feed mechanism is used to copy docum ents one at a time only.

● Open the Single Feed Tray and set a doc um ent in place. The Manual Feed

Take-up Sensor (PWB-D) will detect the document and the Single Feed
Transport Roller/Registration Roller begins to rotate to take up the
document automatically even if the Start key i s not pressed.

Take-Up Motor (M1)

Transport Motor (M2)

Electrical

General/Mechanical

Registration Drive
Roller

Single Feed
Transport Roller

M-17 AFR-12/AF-5Rev. 1.0/05.99

Manual Feed
Take - up Sens o r (P WB-D)

1.8 Document Transport Mechanism

1.8.1 Construction

1.8.2 Document Transport Mec hanism

● The document transport mechanism transport the document, which has

been fed up to the Registration Roller from the document take-up
mechanism, up to the Original Width Scale by means of the Document
Transport Belt.

● During the turnover motion, the Document Transport Belt is turned to

transport the docum ent toward the take-up end.

M2 Control

Whether M2 is turned f orward or bac kward is det ermined by the combinat i on of the
following signals output from IC4 on PWB-A.

IC4

Pin 2 H H L L
Pin 3 L L H H
Pin 6 L H H L
Pin 7 H L L H

Forward Rotation

Backward Rotation

Step1 Step2 Step3 Step4

Procedure

M-18AFR-12/AF-5 Rev. 1.0/05. 99

1.8.3 Original Width Scal e Retraction Mechanism

● When the document is positioned on the Original Glass by the ADF, the

leading edge o f the d ocument is p res sed agai nst th e Ori ginal Width Scale t o
improve positioning accuracy. During turnover and ejection motion,
however, the document must move over the Original Width Scale. For this
reason, the Orig inal Width Scale retraction mechanism is employed.

● Scale Solenoid SOL3 is used to drive the retraction mechanism.

<Operation>

When the document is positioned: SOL3 is de-energized and the Original

Width Scale i s rai sed by t he t ensio n of t he
Original Width Scal e Spring.

While the document is being
transported and during a copy cycle:

SOL3 is en ergi zed and the Original Width
Scale is pressed downward by the
Original Width Scale Drive Lever and
spring.

Electrical

General/Mechanical

SOL3 Control

The SOL3 is energized and de- energized by the signal output from IC3A on
PWB-A.

SOL3 IC3A-14

ON H

OFF L

M-19 AFR-12/AF-5Rev. 1.0/05.99