Konica AD-7 Service Manual

AD-7

SERVICE MANUAL

CONTENTS

GENERAL, MECHANICAL/ELECTRICAL

1. SPECIFICATIO N S. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-1

2. PARTS IDENTIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-2

3. CROSS-SECTIONAL VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-3

4. DRIVE SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-4

5. ELECTRICAL COMPONENTS LAYOUT . . . . . . . . . . . . . . . . . . . . M-5

6. DESCRIPTION OF EACH MECHANISM AND CONTROL

6-1. Exit/Turnover Switching Mechanism . . . . . . . . . . . . . . . . . . . M-6

6-2. Fuser Oil Cleaning Mechanism. . . . . . . . . . . . . . . . . . . . . . . . M-6

6-3. Paper Standby Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-6

6-4. Switchback Operation (Turnover). . . . . . . . . . . . . . . . . . . . . . M-7

7. OPERATION AND CONTROL

7-1. No. of Multiple 2-Sided Copies . . . . . . . . . . . . . . . . . . . . . . . . M-8

7-2. Sensor Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-8

7-3. 2-Sided Copying Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . M-10

DIS/RE ASSE MBL Y, ADJ USTM EN T

1. DISASSEMBLY

1-1. Removal of the Exterior Covers and Guides . . . . . . . . . . . . . D-1

1-2. Removal of Vertical Transport Clutch CL1. . . . . . . . . . . . . . . D-2

1-3. Removal of the Vertical Transport Roller (Metallic One) . . . D-3

1-4. Removal of the Vertical Transport Roller (Rubber One). . . . D-3

1-5. Removal of the Turnover Entrance Guide . . . . . . . . . . . . . . . D-4

2. ADJUSTMENTS

2-1. Adjustment of Dup. Left-Margin . . . . . . . . . . . . . . . . . . . . . . . D-4

2-2. Adjustment of Exit/Turnover Switching Solenoid SL1. . . . . . D-5

TROUBLESHOOTING

1. MISFEED DETECTION

1-1. Misfeed Detection Conditions . . . . . . . . . . . . . . . . . . . . . . . . . T-1

1-2. Misfeed Troubleshooting Procedures. . . . . . . . . . . . . . . . . . . T-2

APPENDED DIAGRAMS

◆

ELECTRICAL WIRING DIAGRAM / ELECTRICAL CIRCUIT DIAGRAM

i

GENERAL,

MECHANICAL/

ELECTRICAL

SPECIFICATIONS

1

Type : Sheet turnover device for making automatic

2-sided copies
Instal la t i on : Mounte d to t he co pi e r
Modes : Exit mode

Duplex mode (single- and two-sheet paper

attraction)

Max. Storage
Capacity
Exit Tray Capacity : 250 sheets of 90-g/m
Registration : Center

Power Source : DC24V ( supplied from copier)
Power Consumption : 30W or le ss

Dimensions : Width .....121 mm or 4-3/4"

Weight : 8.9 kg or 19-1/2 lbs. (including the mount)
Environmental
Requirements

Paper Requirements

- Exit mode ­Type of Paper : Recommended paper weighing 60 to 90 g/m

Paper Si ze : A5 lengt h w ise to A3 lengt hwi s e and A3 Wide or

- Duplex mode ­Type of Paper : Recommended paper weighing 60 to 90 g/m

Paper Size : A5 lengthwise to A3 lengthwise or 5-1/2" × 8-1/2"

: 2 (A4 crosswise or s mal l e r, tw o-sheet pape r

attraction mode)

Depth .....536 mm or 21"

Height .. .. 345 mm or 13-1/2"

: Same as copier

16 to 24 lbs., OHP transparencies, thick paper

weighi ng 15 7 g/ m

5-1/2" × 8-1/2" lengthwise to 11" × 17" lengthwise

and Full Bleed

16 to 24 lbs.

lengthwise to 11" × 17" lengthwise

2

or 24-lb. paper

2

or 42 lbs. max.

2

or

2

or

M-1

PARTS IDENTIFICATION

2

3

2

1

7

8

4

5

6

4458M001AA

10

9

4458M002AA

No. Name No. Name

1 Exit Tray 6 Exit Section Lower Cover
2 Exit Section Cover 7 Turnover Tray
3 Rear Cover 8 Exit/Turnover Sw itching Finger
4 Top Cover 9 Vertical Transport Guide
5 Front Cover 10 Hookup Cord

M-2

CROSS-SECTIONAL VIEW

3

1

9

8

7

No. Name Function

1 Exit Rollers Feed the copy out onto the Exit Tra y.

Exit/Turnover

2

Switching Finger
Vertical Transpor t

3

Guide
Vertical Transpor t

4

Rollers
Vertical Transpor t

5

Sensor PC3
Duplex Paper

6

Take-Up Port

7 Turnover Tray

8 Turnover Rollers

Switchback

9

Sensor PC1

Directs a copy for exit or turnover depending on the
operating mode.

Serves as a guide for the copy for turnover. Used also for
clearing a misfeed.

Transports the copy for turnover. Also removes the fuser
oil from the copy.

Detects a copy to be later turned over. Serves also as a
misfeed sensor.

The port through which the copy which has been turned
over is taken up and fed into the copier for the second
copy cycle.

Prevents the portion of the copy out of the Duplex Unit for
turnover from drooping down.

Reverse the copy fed fro m the ver tical t ransport section
(switchback motion) so that it can be taken up and fed
again into the copier.

Detects the reference t iming for the switchback mot ion of
the copy fed from the vertical transport section.

2
3

4

5

6

4458M003AA

M-3

DRIVE SYSTEM

4

M1

Turnover
Roller

B2

G4

P1

PG2

G5

Exit Roller

Drive from

Copier

G1

Vertical
Transport
Roller

G3

G2

PG1

B1

CL1

4458M004AA

Gear

Symbol

G1 30
G2 24
G3 24
G4 19
G5 33

No. of

Teeth

Pulley

Symbol

PG1 31 28
PG2 15 64

No. of

Teeth, Gear

Pulley

Symbol No. of Teeth

P1 16

M-4

No. of

Teeth, Pulley

Belt

Symbol

B1 288
B2 191.01

Length

(mm)

ELECTRICAL COMPONENTS LAYOUT

5

CL1

PC2

M1

PC3

PC1

◆

Functi on of Each Component

Symbol Name Input Signals (∗) Function

PWB-A Drive Board

M1

SL1

CL1

PC1
(PJ2A-8)

PC2
(PJ3A-2)

PC3
(PJ2A-9)

S1
(PJ2A-6)

Turnover
Motor

Exit/Turnover
Switching
Solenoid

Vertical
Transport
Clutch

Switchback
Sensor

Motor Pulse
Sensor

Vertical
Transport
Sensor

Duplex Unit
Set Switch

Paper present:
Paper not present:
Unblocked:
Blocked:
Paper present:

Paper not present:
Unit in position:

Unit out of position:

Performs commu nica tio n wi th the
copier and controls the elec trical
components of the Duplex Unit.

Drives the Turnove r Rollers to
effect a switchback motion.

Moves the Exit/Turnover
Switching Finger to chan ge the
paper path.

Controls the start and stop of the
Vertical Transpor t Ro llers to keep
the copy in the standby state.

L

Detects the reference tim i ng for a
switchback motion .

H
H

Detects the speed of M1.

L
L

Detects the copy present at th e
vertical transport section.

H

L

Detects whether or not the Duplex
Unit is installed in position.

H

S1

SL1

PWB-A

4458M005AA

∗

Signals at th e p r int jack on PW B-A.

M-5

DESCRIPTION OF EACH MECHANISM AND CONTROL

6

6-1. Exit/Turnover Switching Mechanism

•

The exit/turnover switching mechanism uses the Exit/Turnover Switching
Finger that is moved to change the paper path either for exit or turnover.

•

When in the E xi t mo de or when the co py i s to be fed out in the Dupl ex
mode, Exit/Turnover Switching Solenoid SL1 remains deenergized and the
copy moves above the Exit/Turnover Switching Finger and is fed out of the
copier by the Exit Rollers.

•

When the copy is to be turned over in the Duplex mode, SL1 is ener gized
and the copy moves beneath and along the Exit/Turnover Switching Finger
and is fed by t he Ve rt ical Tran sp or t Rol l er s of the Du pl e x Uni t down
towards the turnover section.

•

As noted above, S L 1 moves the Exit/Turnover Switching Finger to change
the pa per path. I t is energized when a L O W si gnal fr om t he copier is input
to PJ2A-1 on PWB-A.

SL1: Deenergized

Exit

Paper Exit
Roller of Copier

Exit Roller

SL1: Energized

Exit/Turnover
Switching Finger

To Turnover Section

4458M006AA

M-6