Sharp AL-1020, AL-1200, AL-1220, AL-1250 Service Manual

AL-1250

SERVICE MANUAL

CODE: 00ZAL1250/A1E

DIGITAL COPIER

AL-1020
AL-1200
AL-1220

MODEL AL-1250

* This Service Manual describes only the differences from

the AL-1000/1010. For the common items with the
AL-1000/1010,please refer to the AL-1000/1010 manual.

CONTENTS

[ 1 ] GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 1

[ 2 ] SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 1

[ 3 ] EXTERNAL VI EWS AND INTERNAL STRUCTURE. . . . . . . . . . . . 3 - 1

[ 4 ] UNPACKING AND INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . 4 - 1

[ 5 ] OPERATIONAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 1

[ 6 ] DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 2

[ 7 ] SIMULATION,TROUBLE CODES . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 1

[ 8 ] USER PROGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 - 1

[ 9 ] ELECTRICAL SECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 1

[10] CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 - 1

Parts marked with " " is important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safty and performance of the set.

SHARP CORPORATION

This document has been published to be used for
after sales service only.
The contents are subject to change without notice.

AL-1250

[1] GENERAL

1. General

This model is a digital personal copier produced with key words
of “Comfort able copy, Clear copy, Easy copy” providing high
copy performances and copy productivity.

2. Target User Copy Volume: Monthly Average

Copies: 400 ∼ 800 (Max. 800)
Prints: 400 ∼ 800 (Max. 800)

3. Main features

A. High-speed laser copying

● Since warm-up time is zero, copying can be started imme­diately after the power switch is turned on.

● First-copy time is only 9.6 seconds (normal mode).

● Copying speed is 10 copies/min. (AL-1020) or 12

copies/min. (AL-1220/AL-1250), which adapts to business
use, allowing improvement of working efficiency.

B. High-quality digital image

● High-quality image copying at 600 dpi can be performed.

● In addition to the automatic exposure mode, the manual ex-

posure can be adjusted in five steps.

● The photo mode copying function allows clear copying of
delicate halftone original images such as monochrome
photos and color photos.

C. Substantial copying functions

● Zoom copying from 50% to 200% in 1% increments can be
performed.

● Continuous copying of maximum 99 sheets can also be per­formed.

● Automatic document feeding through the single pass feeder
(SPF) can be performed.

● Toner save mode reduces toner consumption by ap­proximately 10%.

● User programs allow setting/modification of functions for
customer’s needs.

D. Scan once/Print many

This copier is equipped with a 1-page memory buffer. This
Memory allows the copier to scan an original 1 time only and
make up to 99 copies. This feature allows for improved
workflow, reduced operating noise from the copier and reduced
wear and tear on the scanning mechanism. This feature
provides for a higher reliability.

4. Environmental

The environmental conditions for assuring the copy quality and
the machine operations are as follows:

A. Normal operating condition

Temperature:20˚C~25
Humidity:65 ± 5%RH

B. Acceptable operating condition

Humidity (RH)

85%

60%

20%

10˚C 30˚C 35˚C

C. Optical condition

Humidity (RH)

90%

60%

15%

–25˚C 30˚C 40˚C

D. Supply storage condition

Humidity (RH)

90%

E. Printer feature

The AL-1250 copier can be used as a laser printer. The AL­1020 and AL-1220 copiers can be used as a laser printer by in­stalling an optional printer upgrade kit.

F. Environmentally friendly design

Paper output tray is housed in the copier for space saving.
Preheat mode and auto power shut-off mode are provided to
reduce power consumption in standby mode.

20%

–5˚C 45˚C

1-1

AL-1250

[2] SPECIFICATIONS

1. Basic specification

Item AL-1020 AL-1220 AL-1250 AL-1200
External dimensions (W × D × H) (mm)
Weight 21.5 kg 21.5 kg 24.5 kg 18.0 kg

H379 × W518 ×

D477 mm

←

2. Operation Specification

Section item Details AL-1020 AL-1220 AL-1250 AL-1200

1 tray (250
Paper feed
section

Electrical
section

Installed memory 6 MB ←←Not Available

*

1) May fluctuate due to environmental conditions and the input voltage.

Paper feed
system

Power source

Power
consumption

sheet) + Multi

bypass (50

sheet)

100V 110V

Voltage

Frequency

Max 1000 W ←←←
Average

(during copying)
Average (stand-

by)
Pre-heat mode 40 Wh/H *1) ←←←
Auto power

shut-off mode

120/127V 230V

240V

Common use

for 50 and 60

Hz

275 Wh/H *1) 285 Wh/H *1) 285 Wh/H *1) 270 Wh/H

70 Wh/H *1) ←←←

18 Wh/H *1) ←←←

←

←←←

←←←

H464 × W518 ×

D477 mm

2 tray (250
sheet × 2) +
Multi bypass
(50 sheet)

H293 × W518 ×

D445 mm

1 tray (250
sheet) + Multi
bypass (50
sheet)

2-1

3. Copy performance

Section item Item AL-1020 AL-1220 AL-1250 AL-1200

Copy speed First copy time

AB system:
A4
(Landscape)

B5
(Landscape)

Inch system 8­1/2" × 14"
(Landscape)

8 1/2" × 11"
(Landscape)

Void

Copy speed
(CPM)

Copy speed
(CPM)

Copy speed
(CPM)

Copy speed
(CPM)

Void area

Image loss

AL-1250

9.6 sec. (Pre­heat mode: 16
sec. or
delow/Auto
power-shut-off

Tray paper feed

Manual paper
feed

SPF

Same size 10 12 ←←
Enlargement 10 12 ←←
Reduction 10 11 ←←
Same size 10 12 ←←
Enlargement 10 12 ←←
Reduction 10 12 ←←
Same size 10 10 ←←
Enlargement 10 10 ←←
Reduction 10 10 ←←
Same size 10 12 ←←
Enlargement 10 12 ←←
Reduction 10 12 ←←
leading edge 1 ~ 255 4 mm ←←←
Tailing edge 4 mm or less ←←←

Side void area

leading edge

Trailing edge

Side void area
(per side)

mode: 23 sec.
or delow Feed
from
Tray1/Scan
Once Print
Many Mode:

13.9 sec
Single: 10

sec./Multi: 8.0
(Pre-heat
mode: 16 sec.)

Optic at
Scanning
Position: 11.5
sec Optic at
Home Position:

13.0 sec

4 mm or less
(per side)

Same size: 3.0
mm or less

Enlarge (200):

1.5 mm or less
Reduction (50):

6.0 mm or less
Same size: 4.0

mm or less
Enlarge (200):

4.0 mm or less
Reduction (50):

4.0 mm or less
Same size: 2.0

mm or less
Enlarge (200):

2.0 mm or less
Reduction (50):

2.0 mm or less

←←←

←←←

—

←←

Not Available

←←←

←←←

←←←

←←←

←←←

←←←

←←←

←←←

←←←

←←←

2-2

AL-1250

4. GDI Printer Specification (Standard for AL-1250, Option for AL-1020/1220)

Printer speed WPPM (TBD) (A4/8-1/2 × 11, Sharp original)
First Print time
CPU None

Memory 4 MB • 6 MB
Interface IEEE1284
Emulation Sleek type GDI
Interface Font None
Resolution 600 dpi
Operation System Compatibility Win 3.1, WFW 3.11, Win 95, Win 98, Win NT 4.0

Minimum System Requirements

9.6 sec (A4/8-1/2 × 11, Not include communication time to the host PC and the set up
time of polygon mirror)

Win 3.1: 486 or better processor, 8 MB Ram (16 recommended)
30 MB of additional HD Space (+5 MB for Win 32s installation)
Win 95: 486 or better processor, 8 MB Ram (16 recommended)
30 MB of additional HD Space.
Win 98: 486 DX or better processor, 16 MB Ram (32 recommended)
30 MB of additional HD Space.
NT 4.0: 486 or better processor, 8 MB Ram (16 recommended)
30 MB of additional HD Space.

5. Other

AL-1020 10cpm/MB/SOPM/SPF
AL-1220 12cpm/MB/SOPM/SPF
AL-1250 12cpm/MB/SOPM/SPF/GDI/2nd

*) The above models allow to use the SOPM function from the SPF.

A. SOPM function

(1) The SOPM function is effective either in the OC copy mode or in the SPF copy mode.
(2) The SOPM in the SPF copy mode: Even when a document is set on the document table and the SPF mode lamp is lighted, the

quantity display remains unchanged (does not turn to “1”). Under that condition, press the quantity set key to set the quantity.

(3) Basic operation: The first document is read and data are stored in the memory and copies of the set quantity are made.

If there is the second document, it is read and the data are stored in the memory and copies of the set quantity are made similarly.
This procedure is repeated until the end of the documents.

B. 2nd cassette door

(1) The sensor output when the 2nd cassette door is open is the same as that when PPD3 is ON. Therefore, when the initial operation

is made (the power is turned on and the side door is opened/closed) with the 2nd door open, the JAM lamp will light up.

6. AL-1200 specifications

The AL-1200 is the 12 sheets/min model of the AL-1010.
The Specifications are the same as those of the AL-1010, except for the copy speed and the average power consumption during copy­ing (270Wh/H (*1)).
Please refer to the Service Manual of the AL-1010.
(*1) Depends on the operating conditions and the input voltage.

2-3

[3] EXTERNAL VIEWS AND INTERNAL STRUCTURES

AL-1250

1. Appearance

(2)

(1)

(13)

(12)

(3)

(7)

(8)

(9)

(10)

(11)

(4)

(20)

(6)

(5)

(14)

(19)

(18)

(1) Operation panel (2) Original table (3) SPF exit area
(4) Original guides (5) Document feeder tray (6) Feeding roller cover

(7) Original cover (8) Side cover (9) Bypass tray
(10) Bypass tray guides (11) Side cover open button (12) Front cover
(13) Paper tray

∗1

(14) Handle (15) Cover for optional printer interface
(16) Paper output tray (17) Paper output tray extension (18) Power switch
(19) Power cord socket (20) Parallel interface connector

∗3

(15)

(16)

(17)

(14)

∗2

∗1 The AL-1250 is equipped with two paper trays.
∗2 (AL-1020/AL-1220 only) (For the AL-1020/AL-1220, a printer upgrade kit is optional.)
∗3 AL-1250 only

2. Internal

(1)

(5)

(2)

(6)

(7)

(3)

(4)

(8)

(1) TC cartridge lock release button (2) TD cartridge (3) Drum cartridge
(4) Drum cartridge handle (5) Paper feed roller (6) Fusing unit release lever
(7) Charger cleaner (8) Transfer charger

3-1

AL-1250

3. Operational panel

(1) (2) (4) (11)(10)(3) (5) (6) (7)

200%

MAX.

1

x

51/

2

100%

x

81/214

x

81/

2

MIN.

x

/

81/211

8

2

x

81/211

x

11

51/281/

2

129%

100%

78%
64%
50%

ZOOM

(9)(8)

(13) (14) (15) (16) (17)(12)

Exposure mode selector key and

(1)

indicators

(4) SPF indicator (5) SPF misfeed indicator (6)

Light and dark keys and exposure

(2)

indicators

(3) Alarm indicators

∗1

Copy ratio selector key and copy
ratio indicators

(7) Zoom indicator (8) Copy ratio display (%) key (9) Display
(10) ON LINE indicator (11) Power save indicator (12) Tray select key
(13) Paper feed location indicators (14) Zoom keys (15) Copy quantity keys
(16) Clear key (17) Print key and ready indicator

∗1

Drum replacement required indicator

When the drum counter reaches 17,000 copies, the indicator lights up. After 1,000 additional copies are made, the indicator starts
blinking and machine will not-operate (after current job) until a new cartridge is installed.

Misfeed indicator

TD cartridge replacement required indicator

When toner density is lower than a specified level, the TONER DEVELOPER CARTRIDGE REPLACEMENT indicator lights up
to warn the user.
If toner is not added after approximately 10 sheets are copied, the indicator starts blinking and machine starts to supply
toner.(Toner Developer cartridg replacement indicator keeps lighting up)
If toner density is not back to specific level after two minutes, the READ indicator goes out and Toner Developer indicator starts
blinking, and the copier stops.

∗2 ON: Indicates that the machine is in the energy saving (pre-heat) mode.

Blink: Indicates that the machine is in the process of resetting from the energy saving mode or just after supplying the power.
OFF: Indicates that resetting from the energy saving mode is completed and that the fusing temperature is in ready state.
The combinations of the above display lamps are as follows: (● = ON, ✕ = OFF)

Lamp Immediately after power ON Ready Copying
Pre-heat lamp Blink ✕✕
Ready lamp ●●✕
Other lamps ●●●

Copy is started during

resetting from energy

saving mode

Lamp

Energy saving mode (Pre-

heating)

Energy saving mode

(Auto power shut off)

Resetting from energy

saving mode

Pre-heat lamp ●●Blink Blink
Ready lamp ●✕●✕
Other lamps ●✕●●

3-2

4. Motors and solenoids

AL-1250

(3)

(2)

(8)

(4)

(1)

(5)

(7)

(6)

No. Part name Control signal Function,operation

(1) Main motor MM Drives the copier.
(2) Mirror motor MRMT Drives the optical mirror base (scanner unit).
(3) Toner motor TM Supplies toner.
(4) Cooling fan motor VFM Cools the optical section.
(5) Resist roller solenoid RRS Resist roller rotation control solenoid
(6) Paper feed solenoid CPFS1 Cassette Paper feed solenoid
(7) Multi paper feed solenoid MPFS Multi manual pages feed solenoid
(8) SPF motor SPFM Drives the single pass feeder

3-3

AL-1250

5. Sensors and switches

(1)

(12)

(2)

(10)

(11)

(3)

(4)

(13)

(5)

(9)

(7)

(6)

(14)

(8)

No. Name Signal Type Function Output

Mirror home position

(1)

sensor

(2) POD sensor POD Transmission sensor Paper exit detection “H” at paper pass
(3) PPD2 sensor PPD2 Transmission sensor

(4) Cassette detection switch CED1 Microswitch

Manual feed detection

(5)

switch

(6) PPD1 sensor PPD1 Transmission sensor

(7) Door switch DSW Micro switch

(8) Door switch DSW Micro switch

(9) Drum reset switch DRST Micro switch

(10) SPF sensor

(11) SPPD sensor SPPD Transmission sensor Paper transport detection “L” at paper pass

(12) SDOD sensor SDOD Transmission sensor

(13) 2nd cassette DSW Micro switch

(14) PPD3 sensor PPD3 Transmission sensor

MHPS Transmission sensor

MFD Transmission sensor

SPID/SD
SW

Transmission sensor

Mirror (scanner unit)
home position detection

Paper transport detection
2

Cassette installation
detection

Manual feed paper
detection (single only)

Paper transport detection
1

Door open/close
detection (safety switch
for 5V)

Door open/close
detection (safety switch
for 24V)

New drum detection
switch

Paper entry detection
Cover open/close
detection

SPF open/close detection
Book sensor

2nd cassette door open
detection

Paper transport
detection 3

“H” at home position

“L” at paper pass

“H” at cassette insertion

“L” at paper detection

“L” at paper pass

1 or 0V of 5V at door
open

1 or 0V of 24V at door
open

Instantaneously “H” at
insertion of new drum

“L” at paper pass

“L” at paper pass
1 or 0V of 5V at door

open
“L” at paper pass

3-4

6. PWB unit

AL-1250

(1)

(2)

(9)

(5)

(8)

(6)

(4)

(3)

(7)

No. Name Function

(1) Exposure lamp invertor PWB Exposure lamp (Xenon lamp) control
(2) Main PWB (MCU) Copier control
(3) Operation PWB Operation input/display
(4) Power PWB AC power input, DC voltage control, High voltage control
(5) CCD sensor PWB For image scanning
(6) LSU motor PWB For polygon motor drive
(7) TCS PWB For toner sensor control
(8) LSU PWB For laser control
(9) Memory PWB 6MB For memorying data

3-5

AL-1250

7. Cross sectional view

(4)

(19) (16) (17)

(6)

(5)

(3)

(15)

(14)

(18)

(1)

(2)

(7)

(8)

(9)

(10)

(11)

(12)

(13)

No. Part name Function and operation

(1) Scanner unit
(2) Exposure lamp Exposure lamp (Xenon lamp) Illuminates original

(3) Lens unit Scans the original image with the lens and the CCD.
(4) LSU (Laser unit) Converts the original image signal into laser beams and writes onto the drum.
(5) Paper exit roller Roller for paper exit
(6) Main charger Provides negative charges evenly to the drum surface.
(7) Heat roller Fuses toner on the paper. (Teflon roller)
(8) Pressure roller Fuses toner on the paper. (Silicon rubber roller)

(9) Drum Forms images.
(10) Transfer unit Transfers images onto the drum.
(11) Pickup roller Picks up the manual feed paper. (In multi feed only)

Manual paper feed

(12)

tray
Manual paper feed

(13)

roller
(14) PS roller unit Takes synchronization between the lead edge and the rear edge of the paper.
(15) Paper feed roller Picks up a sheet of paper from the cassette.
(16) Pickup roller Picks up documents.
(17) Separation roller Separates documents to feed properly.
(18) PS roller Feeds documents to the scanning section.
(19) Paper exit roller Discharges documents.

Illuminates the original with the copy lamp and passes the reflected light to the lens unit
(CCD).

Tray for manual feed paper

Transport the paper from the manual paper feed port.

3-6

[4] UNPACKING AND INSTALLATION

1. A WORD ON COPIER INSTALLATION

Improper installation may damage the copier. Please note the
following during initial installation and whenever the copier is
moved.

Do not install your copier in areas that are:

● damp, humid, or very dusty

AL-1250

● subject to extreme temperature or humidity changes, e.g.,
near an air conditioner or heater.

Be sure to allow the required space around the machine for
servicing and proper ventilation.

● exposed to direct sunlight

● poorly ventilated

4"

(10cm)

8"(20cm)

4"
(10cm)

8"(20cm)

2. CHECKING PACKED COMPONENTS AND

ACCESSORIES

Open the carton and check if the following components and ac­cessories are included.

Power cord

Operation manual
(Printer driver (CD-ROM)
AL-1250 only)

Interface cable
(IBM PC/AT or compatible computer)
(AL-1250 only)

TD cartridge

4-1

Copier

Drum cartridge

(installed in copier)

AL-1250

3. UNPACKING

Be sure to hold the handles on both sides of the copier to un­pack the copier and carry it to the installation location.

2) Remove the CAUTION tape from the front cover and
remove the two protective pins from the fusing unit by pull­ing the strings upward one at a time.

4. REMOVING PROTECTIVE PACKING
MATERIALS

1) Remove pieces of tape and protective cover. Then open the

original cover and remove protective materials (a) and (b).

AL-1020/AL-1220

AL-1250

2) Use a coin (or suitable object) to remove the screw.

Store the screw in the paper tray because it will be used if
the copier has to be moved.

CAUTION tape

Protective pins

3) Push gently on both sides of the front cover to open the
cover.

4) Remove the TD cartridge from the bag. Remove the protec­tive paper. Hold the cartridge on both sides and shake it
horizontally four or five times.

4 or 5 times

5. INSTALLING THE TD CARTRIDGE

1) Open the bypass tray and then open the side cover while
pressing the side cover open button.

5) Hold the tab of the protective cover and pull the tab to your
side to remove the cover.

6) Gently insert the TD cartridge until it locks in place.

4-2

7) Close the front cover and then the side cover by pressing
the round projections near the side cover open button.

AL-1250

4) Adjust the paper guides on the paper tray to the copy paper
width and length. Squeeze the lever of paper guide (A) and
slide the guide to match with the width of the paper.
Move paper guide (B) to the appropriate slot as marked on
the tray.

6. LOADING COPY PAPER (installing the
paper tray)

1) Raise the handle of the paper tray and pull the paper tray

out until it stops.

2) Remove the pressure plate lock. Rotate the pressure plate

lock in the direction of the arrow to remove it while pressing
down the pressure plate of the paper tray.

Paper guide (B)

Paper guide (A)

5) Fan the copy paper and insert it into the tray. Make sure the
edges go under the corner hooks.

6) Gently push the paper tray back into the copier.

3) Store the pressure plate lock which has been removed in
step 2 and the screw which has been removed when un­packing (see page 4-2, step 2 of REMOVING PROTEC­TIVE PACKING MATERIALS) in the front of the paper tray.
To store the pressure plate lock, rotate the lock to fix it on
the relevant location.

Pressure plate lock

Screw

7. POWER TO COPIER

1) Ensure that the power switch of the copier is in the OFF
position. Insert the attached power cord into the power cord
socket at the rear of the copier.

2) Plug the other end of the power cord into the nearest outlet.

4-3

AL-1250

[5] OPERATIONAL DESCRIPTIONS

1. SPF section

A. Outline

The SPF (Single Path Feeder) is installed to the AL-1000/1200 as a standard provision, and it automatically copies up to 30 sheets
of documents of a same size. (Only one set of copies)

B. Document transport path and basic composition

(1) Pickup roller (2) Sheet of document for paper feed (3) Set detection ACT
(4) Paper stopper (5) Document feed roller (6) Separation sheet
(7) Paper entry sensor (8) PS roller D (9) Transport follower roller

(10) Paper exit roller (11) Paper exit follower roller (12) Document tray

C. Operational descriptions

(Copier side)

MM rotation

CPFS ON

PPD ON

RRC ON

(Transfer)

(Fusing)

Time chart (Tray feed)

Document set

SPID ON

Document feed unit lamp ON

PSW ON

MIRM rotation

Main motor rotation

Paper feed

Synchronization

Paper transport

Document set sensor

Copy start

The scanner is shifted
to the exposure position.

(SPF side)

SPFM rotation

SPUS ON

SPPD ON

(Exposure)

(Document exit)

SPF motor rotation

Document feed

Document transport sensor
Document transport

POD ON

(Paper exit)

In the zooming mode, the magnification ratio in the sub
scanning direction (paper transport direction) is adjusted
by changing the document transport speed.

5-1

AL-1250

D. Cases where a document jam is caused

a. When SPPD is ON (document remaining) when the power is turned on.
b. When SPPD is not turned ON within about 1.5 sec (at 100% copy) after starting the document feed operation.
c. When SPPD is not turned on within about 4.7 sec (at 100% copy) after turning on SPPD.
d. When the SPF document jam release door or the OC cover is opened during document transport (SPF motor rotating).

[6] DISASSEMBLY AND ASSEMBLY

1. SPF

No. Part name Ref.

A Sensor PWB
B Pickup solenoid
C Clutch
D Manual paper feed roller, pickup roller
E Belt
F SPF motor
G Paper entry sensor
H PS roller

I Paper exit roller

Pickup unit removal

1) Remove three fixing pawls from the bottom of the machine.

2) Remove the front cover and the rear cover.

2

2

1) Remove the belt, the paper feed frame SP, and two har­nesses.

2) Remove the pickup unit.

1

1

2

3

4

3

1

*

When installing the parts, be careful of the hole position of

1

the paper frame SP.

1

5-2

AL-1250

A. Sensor PWB

1) Remove two screws from the bottom of the pickup unit.

2) Remove the upper cover.

2

C. Clutch

1) Remove the E-ring.

2) Remove the pulley and bush.

3) Slide the bush in the arrow direction.

4) Lift the clutch, and 5) remove the clutch.

1

1) Remove two screws.

2) Remove the sensor PWB.

3) Remove the harness.

1

2

2

5

1

3

1

3

1) Remove the E-ring.

4

1

2) Remove the parts.

1

B. Pickup solenoid

1) Remove two screws.

2) Remove the pickup solenoid

2

*

When installing, hang iron core A on the solenoid arm.

1

A

2

D. Manual paper feed roller, pickup roller

1) Lift the paper stopper.

2) Slide the takeup roller unit.

3) Slide the bush in the arrow direction.

4) Remove the takeup roller unit.

A

1

2

4

6-1

3

*

When installing the takeup roller, hang the projection of the
takeup roller unit on the solenoid arm.

1) Remove the parts.

2) Remove the manual paper feed roller.

3) Remove the pickup roller.

4) Remove the parts.

4

3

1

1

F. SPF motor

1) Remove the harness.

2) Remove four screws.

3) Remove the drive unit.

4) Remove the belt.

5) Remove two screws.

6) Remove the SPF motor.

5

AL-1250

6

2

1

1

Transport unit removal

1) Remove two screws.

2) Remove the document tray unit.

3) Remove five screws.

4) Remove the transport unit.

2

3

3

1

5

2

3

1

3

G. Paper entry sensor

1) Loosen the screw.

2

3

4

2) Open the paper exit PG.

3) Remove the paper entry sensor.

4) Remove the harness.

4

E. Belt

1) Remove the belt.

4

3

1

2

1

6-2

AL-1250

H. PS roller

1) Remove the parts.

2) Remove the PS roller.

1) Open the right cabinet.

2) Remove three screws.

3) Remove one connector.

4) While tilting down the 2nd connection arm A, pull and
remove the paper feed unit toward you.

1

I. Paper exit roller

1) Remove the parts.

2) Remove the paper exit roller.

1

1

D

1

2

*

When installing, securely insert two bosses C on the machine

D

A

1

C

4

3

B

2

side and two bosses D on the paper feed unit side. Be sure
to fix the earth B.

*

Insert the 2nd page feed.

A. Paper sensor

1) Remove the pawl.

2) Remove the paper sensor.

3) Remove the harness.

2

2

3

2. 2ND CASSETTE (AL-1250 only)

No. Part name Ref.

A Paper sensor
B Cassette detection SW
C Paper feed solenoid
D Transport roller
E Paper feed clutch
F 2nd paper feed roller

Paper feed unit removal

1) Remove the screw.

2) Remove the rear cover.

*

When installing, engage the pawl and install the unit.

A

2

1

1

B. Cassette detection SW

1) Remove the pawl.

2) Remove the cassette detection SW.

3) Remove the harness.

1

3

2

6-3

C. Paper feed solenoid

1) Remove the screw.

2) Remove the connector.

3) Remove the paper feed solenoid.

3

AL-1250

E. Paper feed clutch

1) Remove the E-ring.

2) Remove the paper feed clutch.

3) Remove the parts.

2

A

2

1

1

D. Transport roller

1) Remove two E-rings.

2) Remove the transport roller.

4

1

A

B

2

*

Install so that the earth spring A is brought into contact over

3

bearing B.

3

*

When installing, fit the cut surface A.

F. 2nd paper feed roller

1) Remove the E-ring and the parts.

2) Remove the 2nd paper feed roller.

1

B

2

A

D

*

When installing, hang the 2nd connection arm on the 2nd

C

1

connection arm SP B. Be sure to install so that the earth
spring C is in contact under the bearing D.

6-4

AL-1250

[7] SIMULATION TROUBLE CODE

1. Contents of simulations

Main code Sub code Contents

2 2 SPF sensor status display

(Operation/Procedure)
ON/OFF of the SPF sensor is displayed with the lamps on the operation panel.

Sensor name Display lamp

Document set sensor (SPID) Developer cartridge replacement lamp

SPF document transport sensor (SPPD) Jam lamp

SPF cover sensor (SCOD) Photoconductor cartridge replacement lamp

SPF open/close sensor (SDSW) SPF jam lamp

3 SPF motor operation check

(Operation/Procedure)
When the start key is pressed, the SPF motor rotates for 10 sec at the speed corresponding to
the currently set magnification ratio.

4 SPF paper feed solenoid (SPUS) operation check

(Operation/Procedure)
When the start key is pressed, the SPF paper feed solenoid repeats ON (500 ms) and OFF (500
ms) 20 times.

5 RSPF pressure release solenoid (SPFS) operation check

(Operation/Procedure)
When the start key is pressed, the RSPF document transport solenoid (SPFS) repeats ON (500
ms) and OFF (500 ms) 20 times.

6 RSPF resist clutch (SRRC) operation check

(Operation/Procedure)
When the start key is pressed, the RSPF resist clutch (SRRC) repeats ON (500 ms) and OFF
(500 ms) 20 times.

7 RSPF gate solenoid (SGS) operation check

(Operation/Procedure)
When the start key is pressed, the RSPF gate solenoid (SGS) repeats ON (500 ms) and OFF
(500 ms) 20 times.

26 2 SPF setting

(Operation/Procedure)

1. When this simulation is executed, the currently set code number of SPF is displayed.

2. Enter the code number and press the start key. The setting is changed.
Code number SPF

0 Without SPF
1 With SPF
2 With RSPF

3 Second cassette setting

(Operation/Procedure)

1. When this simulation is executed, the currently set code number of the second cassette is

displayed.

2. Enter the code number and press the start key. The setting is changed.
Code number Second cassette

0 Without second cassette
1 With second cassette

7-1

Main code Sub code Contents

26 43 Side void amount setting

(Operation/Procedure)

1. When this simulation is executed, the currently set code number of the side void amount is
displayed.

2. Enter the code number and press the start key. The setting is changed.

Code number Setting

0 0 mm
1 0.5 mm
2 1.0 mm
3 1.5 mm

*

4 2.0 mm

Default
5 2.5 mm
6 3.0 mm
7 3.5 mm
8 4.0 mm
9 4.5 mm

10 5.0 mm

44 SPF document rear edge detection setting (Used to erase the document rear edge shade

generated in SPF reduction copy.)
When this simulation is executed, the currently set code number is displayed. Enter the desired

code number and press the START key, and the display will be changed. The document rear
edge scanning area in SPF reduction (less than 100%) copy is changed.

AL-1250

The code number is changeable in the range of 0 - 8.
The default value is 4, and 2 mm of the document rear edge is cut.
When the value is changed by 1, the area is changed by 1 mm.

50 1 Lead edge image position and paper lead edge/rear edge void adjustment

(Outline)
This adjustment is used to adjust the copy image position and lead edge/rear edge void amount
on the copy paper by adjusting the image scan start position and the print start position (resist
roller ON timing) at 100%.
(Operation/Procedure)

1. When this simulation is executed, the currently set value is displayed in two digits. (Center
value: 50)

2. When the copy mode select key is pressed, each setting mode and the display are changed.

∗ The selected adjustment mode is indicated by the lamps as shown in the table below.

3. Enter the adjustment value with the 10-key and press the start key. The set value is stored
and a copy is made. (When the set value is increased by 1, the void amount is shifted by 0.1
mm.)

4. When the clear key is pressed, the set value is stored and the simulation mode is terminated.

Adjustment mode Display lamp
Print start position AE lamp
Image lead edge void amount TEXT lamp
Image scan start position (Scanner) PHOTO lamp
Image rear edge void amount AE, TEXT, PHOTO lamp
SPF image scan start position AE, TEXT lamp

7-2

AL-1250

Main code Sub code Contents

50 1 (Adjustment method)

1. Set the print start position (A: AE ON), the lead edge void amount (B: TEXT ON), the scanning
start position (C: PHOTO ON) to zero and make a copy of a scale at 100%.

2. Measure the image loss R (mm) of the scale.
Set as C = 10 × R (mm). (Example: Set to 30.)
∗ When C is increased by 10, the image loss is

decreased by 1 mm. (Default: 5)

3. Measure the distance H (mm) from the paper lead
edge to the image print start position.
Set as A = 10 × R (mm). (Example: Set to 50.)
∗ When the value of A is increased by 10, the

image lead edge is shifted toward the paper
lead edge by 1 mm. (Default: 50)

4. Set the lead edge void amount as B = 50 (2.5
mm). (Default: 50)
∗ When the value of B is increased by 10, the

void is increased by about 1 mm.
(For 25 or less, however, the void amount
becomes zero.)

✩ The SPF adjustment is made by adjusting the SPF image scan start position immediately after

turning on the power.

10 Center offset adjustment

(Outline)
The center offset position of copy image on the copy paper and that of document scan are
adjusted by adjusting the scan left margin of ASIC and the print left margin register set value.
(Operation/Procedure)

1. When this simulation is executed, the currently set value is displayed.

2. For a machine with a multi manual paper feed unit installed, when the copy mode select key is
pressed, each set mode and display are changed.
For a machine with a single manual paper feed unit installed, when the copy mode select key
is pressed, each set mode and display are changed.

(Example)

Distance from the paper
lead edge to the image
H = 5mm

Image loss
R = 3mm

✩ Machine with a multi manual paper feed unit

Adjustment mode Display lamp
Print center offset (Main cassette paper feed) AE, main cassette lamp
Print center offset (2nd cassette paper feed) AE, 2nd cassette lamp
Print center offset (Manual paper feed) AE, Manual paper feed lamp
OC/Document center offset AE, TEXT lamp
SPF/Document center offset AE, TEXT, PHOTO lamp

✩ Machine with a single manual paper feed unit

Adjustment mode Display lamp
Print center offset (Main cassette paper feed) AE, Main cassette lamp
Print center offset (Manual paper feed) AE lamp (Blinking)
OC/Document center offset AE, TEXT lamp
SPF/Document center offset AE, TEXT, PHOTO lamp

7-3

Main code Sub code Contents

51 2 Resist amount adjustment

(Outline)
The contact pressure of paper onto the resist roller and the RSPF resist roller is adjusted.
(Operation/Procedure)

1. When this simulation is executed, the currently set value is displayed.

2. For a machine with a multi manual paper feed unit installed, when the copy mode select key is
pressed, each set mode and display are changed.
For a machine with a single manual paper feed unit installed, when the copy mode select key
is pressed, each set mode and display are changed.

✩ Machine with a multi manual paper feed unit

Adjustment mode Display lamp
Main cassette paper feed AE, main cassette lamp
2nd cassette paper feed AE, 2nd cassette lamp
Manual paper feed AE, manual paper feed lamp
RSPF document feed AE, TEXT, PHOTO lamp

✩ Machine with a single manual paper feed unit

Adjustment mode Display lamp
Main cassette paper feed AE, main cassette lamp
Manual paper feed AE lamp (Blinking)
RSPF document feed AE, TEXT, PHOTO lamp

AL-1250

6 SPF exposure correction amount adjustment

(Outline)
The APF exposure correction amount is adjusted by adjusting the change in Vref voltage for the
OC mode.
(Operation/Procedure)

1. When this simulation is executed, the currently set value is displayed.

2. Enter the adjustment value with the 10-key and press the start key. The entered value is
stored and a copy is made.

∗ When the adjustment value is changed by 1, the D/A output is changed by +1 digit (dark)

for OC exposure. When it is changed by –1, the output is changed by –1 digit (light).

3. When the clear key is pressed, the entered value is stored and the simulation mode is
terminated.

64 1 Self print by the engine only (1 by 2 mode)

(Outline)
Used to print in the 1 by 2 mode by ignoring the state of the optical system.
(Operation/Procedure)

1. When this simulation is executed, warming up is made and the ready lamp is lighted.

2. Select with the cassette select key and press the start key. Paper is fed from the selected
cassette and printing is performed.

In the 1 by 2 mode, one line is printed and two lines are not printed.

7-4

AL-1250

[8] USER PROGRAM

The conditions of factory setting can be changed according to the use conditions.

1. Functions which can be set with the user program

Function Contents Factory setting

●

When a certain time is passed after completion of copying, this function returns to the

Auto clear.

Pre-heat.

Auto shut off
passing time.

Stream feeding.

Auto shut off setting

∗Note: The power consumption values in pre-heat and auto shut off may be varied depending on the use conditions.

2. Change the setting.

Example: Changing the time to operate the auto shut off func-

tion (Change from 60 sec to 90 sec)

1) Press the right and the left exposure adjustment keys
simultaneously to start setting.

● Keep pressing the keys for five sec.

● Display lamps ( , , blink simultaneously and “-

-” is displayed on the copy quantity display.

2) Select the function code with the 10-digit key (copy
quantity set key).

● The number of the selected function blinks on the digit of 10

on the copy quantity display.

● For auto clear, select “1.”

● For setting, refer to the following function codes.

initial state automatically. The time to reach the initial state can be set in the range of
30 sec to 120 sec by the unit of 30 sec. This function can be disabled.

●

When the copier is left unused with the power ON, the power consumption is
automatically reduced to about 40Wh/H (∗ Note).
The time to start this function can be set in the range of 30 sec to 90 sec by the unit
of 30 sec. This function cannot be disabled.

●

When this function is operated, the pre-heat lamp on the operation panel lights up.
To return to the initial state, press any key on the operation panel. (When the COPY
button is pressed, a copy is made after returning to the initial state.)

●

When the copier is left unused with the power ON, the power consumption is
automatically reduced to about 18Wh/H (∗ Note). The time to start this function can be
set in the range of 2 min to 120 min.

●

When this function is operated, all the lamps except for the pre-heat lamp on the
operation panel turn off.
To return to the initial state, press the COPY button.

After completion of copying with the automatic document feeder (SPF), when documents
are set while the SPF indicator is blinking (for about 5 sec), the documents are
automatically fed.

●

Used to set or cancel this function. Set

Function name Function code
Auto clear 1
Pre-heat 2
Auto shut off passing time 3
Stream feeding 4
Auto shut off setting 5

[Cancel] If a wrong code is entered, press the clear key and

enter the correct function code.

3) Press the COPY button.

● The number blinking on the digit of 10 of the coyp quantity
display is lighted.

● The number of the current set code blinks on the digit of 1.

4) Select the setting code with 1-digit key (copy quantity

set key).

● To set to 90 sec, select “3.”

● For setting, refer to the following set codes.

60 sec

90 sec

5 min

Set

✽

Function
name

Auto clear

∗ : Factory setting

● The number of the selected set code blinks on the digit of 1
of the copy quantity display.

[Cancel] When a wrong number of the function code is set,

5) Press the COPY button.

● The number blinking on the digit of 1 of the copy quantity
display is lighted up. This means the setting is completed.

Set code

0 (Cancel)
1 (30 sec) 1 (60 sec) ∗1 (5 min) ∗1 (Setting) ∗1 (Setting)

∗2 (60 sec) ∗2 (90 sec) 2 (15 min)

3 (90 sec) 3 (30 min)

4 (120 sec) 4 (60 min)

press the clear key and perform the procedure again
from 2.

Function
name

Pre-heat

Set code

0 (30 sec)

Function
name

Auto shut
off

Set code
0 (2 min)

5 (120 min)

[Note] To set another function, press the clear key after com-

6) Press either one of exposure adjustment keys

● Display lamps ( , , ) go off and the copy quan­tity display returns to the normal state.

8-1

Function
name

Stream
feeding

pletion of this operation and perform the procedure
from 2.

( or ) to co mplete the sett ing.

Set code

0 (Cancel)

Function
name

Auto shut
off setting

Set code

0 (Cancel)

3. AE level adjustment (OC mode)

[Input method]

When the PHOTO lamp lights up, press and hold the density
select key for 5 sec, and the AUTO mode lamp will blink and
the adjusted level will be displayed on the exposure level dis­play.

[Adjustment]

For adjustment, press the density adjustment key too select the
density in 5 steps.

[Terminating method]

Press the density select key, and the model display will turn
from blinking to lighting to terminate the AE level adjustment.

4. AE level adjustment (SPF mode)

[Input method]

While the SPF mode lamp is lighting, when the PHOTO mode
lamp lights up, press and hold the density select key for 5 sec,
and the AUTO mode lamp will blink and the adjusted level will
be displayed on the exposure level display.

[Adjustment]

For adjustment, press the density adjustment key to select the
density in 5 steps.

[Terminating method]

When the density select key is pressed, the mode display will
turn from blinking to lighting to terminate the AE level adjust­ment.

AL-1250

5. Toner save mode setup and cancel

[Input method]

When the TEST mode lamp lights up, press and hold the den­sity select key for 5 sec, and the PHOTO mode lamp will turn
from blinking to lighting and the adjusted level will be displayed
on the exposure level display.

[Setup/Cancel]

Press the left key: Level “1” ON, toner save mode setup Press
the right key: Level “5” ON, toner save mode cancel.

[Terminating method]

When the density select key is pressed, the mode display turns
from blinking to lighting to terminate setup.

8-2

AL-1250

[9] ELECTRICAL SECTION

1. Block diagram

A. Overall block diagram

9-1

B. Main PWB block diagram

AL-1250

9-2

AL-1250

2. Circuit descriptions

A. Main PWB (MCU)

(1) CPU signal table

The additional signal is as follows:

Pin No. Signal name In/Out During operation

109 SIN3 Input Sensor input 3

The signals of function change are as follows:

Pin No. Signal name In/Out During operation

119 MRMT3 Motor output Mirror motor/SPF motor control signal
120 MRMT2 Motor output Mirror motor/SPF motor control signal
121 MRMT1 Motor output Mirror motor/SPF motor control signal
122 MRMT0 Motor output Mirror motor/SPF motor control signal

(2) ASIC signal table

The additional signal is as follows:

Pin No. Signal name In/Out Connection Descriptions

SPF gate solenoid

201 SGS Output TR array IC

202 SRRC Output TR array IC

203 SPUS Output TR array IC

208 SPFS Output TR array IC

209 SMSEL Output TR array IC

227 CPFS2 Output TR array IC

control signal. “H”: Gate
solenoid ON

SPF resist roller clutch
control signal. “H”:
Clutch ON

SPF pickup solenoid
control signal. “H”:
Solenoid ON

SPF paper feed solenoid
control signal. “H”:
Solenoid ON

SPF/mirror motor relay
switch signal. “L”: Mirror
motor, “H”: SPF motor

2nd cassette paper feed
solenoid control signal.
“H”: Solenoid ON

(3) Input signal table

The additional signals are as follows:

Signal name Descriptions

SPID SPF paper entry detection signal

SPF

2nd

SPPD SPF paper transport detection signal

SDOD SPF open/close detection signal

SDSW SPF cover open/close detection signal

CED2 2nd cassette section cassette presence detection
PPD3 2nd cassette section paper transport detection

9-3

AL-1250

(4) Mirror motor circuit

The mirror motor is a stepping motor. Its driver is IC113 constant-current chopper control IC (SLA7024). For control, the CPU
outputs a drive signal to IC113 to drive the mirror motor by 1-2 phase excitement.
The SPF motor and the mirror motor are switched with relays RY1 and RY2. The switching signal is SMSEL-. When SMSEL­is LOW, a current flows through the SPF motor. When it is HIGH, a current flows through the mirror motor.

/SMSEL

ULN2003

24V-mir

24V

RY102 G5V-2(OMRON)

RY101 G5V-2(OMRON)

M

SPF motor

M

9-4