Sharp AL-841 Manuale utente

CODE: 00ZAL841//F1E

DIGITAL LASER

MULTIFUNCTION

MODEL AL-841

This document has been published to be used

for after sales service only.

The contents are subject to change without notice.

[ 1 ] SYSTEM CONFIGURATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

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

[ 5 ] EXTERNAL VIEW AND INTERNAL STRUCTURE. . . . . . . . . . . . 2

[ 6 ] MACHINE OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

[ 7 ] ADJUSTMENTS, SETTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

[ 8 ] SIMULATION (Test Command) ⋅USER PROGRAM . . . . . . . . . . 5

[ 9 ] ACTUAL WIRING CHART. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

[10] CIRCUIT DIAGRAM AND PARTS LOCATION CHART . . . . . . . 10

PARTS GUIDE

This Service Manual describes only the different points from the AL-840.

For servicing of the AL-841, therefore, use this Service Manual together

with that of the AL-840.

CONTENTS

AL-841

At the production line, the output power of

the scanner unit is adjusted to 0.33

MILLI-WATT PLUS 20 PCTS and is

maintained constant by the operation of the

Automatic Power Control (APC).

Even if the APC circuit fails in operation for

some reason, the maximum output power

will only be 15 MILLI-WATT 0.1 MICRO-

SEC. giving an acceptable emission level

of 42 MICRO-WATT which is still-less than

the limit of CLASS-1 laser product.

The foregoing is applicable only to the 220V

model, 230V model and 240V model.

Laserstrahl

CAUTION

VORSICHT

ADVARSEL

ADVERSEL

VARNING

OSYNLIG LASERSTRÅLNING NÄR DENNA DEL ÄR ÖPPNAD OCH SPÄRRAR ÄR

URKOPPLADE. STRÅLEN ÄR FARLIG.BETRAKTA EJ STRÅLEN.

USYNLIG LASERSTRÅLNING VED ÅBNING. NÅR SIKKERHEDSBRYD-

ERE ER UDE AF FUNKTION. UNDGÅ UDSAETTELSE FORSTRÅLNING.

UNSICHTBARE LASERSTRAHLUNG WENN ABDECKUNG GEÖFFNET UND SICH-

ERHEITSVERRIEGELUNG ÜBERBRÜCKT. NICHT DEM STRAHL AUSSETZEN.

INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS

DEFEATED AVOID EXPOSURE TO BEAM.

Caution

VARO!

AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA

NÄKYMÄTÖNTÄ LASERSÄTEILYLLE. ÄLÄ KATSO SÄTEESEEN.

USYNLIG LASERSTRÅLING NÅR DEKSEL ÅPNES OG SIKKERHEDSLÅS BRYTES.

UNNGÅ EKSPONERING FOR STRÅLEN.

Caution

This product contains a low power laser

device. To ensure continued safety do not

remove any cover or attempt to gain access

to the inside of the product. Refer all

servicing to qualified personnel.

LUOKAN 1 LASERLAITE

KLASS 1 LASER APPARAT

The fusing unit is hot. Exercise care when inspecting it.

Do not switch the printer rapidly on and off. After turning the printer off,

wait 10 to 15 seconds before turning it back on.

Printer power must be turned off before installing any supplies.

Wave length

Pulse times

Output Power

780 ± 15nm

(9.3 ± 2µs)/7mm

0.4mW ± 0.05mW

VAROITUS! LAITTEEN KÄYTTÄMINEN MUULLA

KUIN TÄSSÄ KÄYTTÖOHJEESSA MAINITULLA

TAVALLA SAATTAA ALTISTAA KÄYTTÄJÄN

TURVALLISUUSLUOKAN 1 YLITTÄVÄLLE

NÄKYMÄTTÖMÄLLE LASERSÄTEILYLLE.

VARNING - OM APPARATEN ANVÄNDS PÅ ANNAT

SÄTT ÄN I DENNA BRUKSANVISNING

SPECIFICERATS, KAN ANVÄNDAREN UTSÄTTAS

FÖR OSYNLIG LASERSTRÅLNING, SOM

ÖVERSKRIDER GRÄNSEN FÖR LASERKLASS 1.

CLASS 1

LASER PRODUCT

LASER KLASSE 1

AL-841

[1] SYSTEM CONFIGURATION

3. SOFTWARE

Items Contents Media

GDI Printer driver Printer driver CD-ROM

Twain driver Scanner driver

4. OPERATING ENVIRONMENT

(1) System requirements

Host computer Operating system Emulation Plug and play Network

IBM PC/AT or

100% compatible

(Supported ECP mode)

MS-DOS 3.3 +

MS-Windows 3.1X or later

MS-Windows 95/98

MS-Windows NT 4.0

Sleek type GDI (Printer)

Twain (Scanner) Supported Not supported

∗MS-DOS 3.3 + (Printer only)

(2) Interface

Type Host computer Operating system Protocol

IEEE1284P ×1 IBM PC/AT or

100% compatible MS-DOS 3.3 +

MS-Windows 3.1X or later

MS-Windows 95/98

MS-Windows NT 4.0

Peppy

Nibble

ECP

[2] SPECIFICATIONS

D. Scanner mode

(1) System requirements

a. Operating conditions

Host computer Operating system Software/Driver Plug and play Network

IBM PC/AT or compatible

(Supported ECP mode) Windows 3.1x Twain driver Supported Not supported

Windows 95/98

Windows NT 4.0

b. Interface

Type Host computer Operating Protocol

IEEE 1284 P IBM PC/AT or compatible Windows 3.1x ECP

Windows 95/98

Windows NT 4.0

AL-841

– 1 –

[5] EXTERNAL VIEW AND INTERNAL STRUCTURE

B. Internal parts

(1) Parts in each section

c. Optical section

<1> Scanner (reading) section

No. Parts Note

Code Signal

name Name Type Function/operation Active condition

1 Scanner lamp

control PWB Drives the scanner lamp. Maintains

the lamp light quantity at a constant

level.

2 Scanner drive wire Transmits the scanner motor power

to the scanner unit.

3 Scanner motor Drives the scanner unit.

4 MHPS MHPS Scanner home

position sensor Photo

transmission

sensor

Detects the scanner home position.

By this signal the image scanning

operation is controlled.

HIGH (5V) when

the home position

is detected.

5 Lens Transfers the document image to

CCD.

6 CCD

SENSOR CCD OUT CCD (Image)

sensor CCD Scans the document images (photo

signals) and converts them into

electrical signals.

Digital signal (8Bit)

7 Scanner lamp Radiates light to the document to

allow the CCD to scan the document

images.

8 SL SENSOR PDA/PDK Scanner lamp light

quantity sensor Photo diode Detects the scanner lamp light

quantity. This signal is inputted to the

scanner lamp control PWB to control

the scanner lamp drive voltage to

maintain a constant level of light

quantity.

Analog signal

(0 ∼0.5V)

9 No. 1 mirror Leads the document image to CCD.

10 No. 2 mirror Leads the document image to CCD.

11 No. 3 mirror Leads the document image to CCD.

10)

11)

8) SL SENSOR

6) CCD SENSOR

4) MHPS

10) 8) SL SENSOR 7) 6) CCD SENSOR

11) 9) 5) 3)

4) MHPS

AL-841

– 2 –

C. Functional parts

(5) PWB

No. Parts MODEL Note

Name Function/operation

1 Power PWB Outputs DC power. Drives the heater lamp. The voltage specification differs

depending on the destination.

2 Scanner lamp drive

PWB Controls light quantity of the scanner lamp.

3 ICU PWB Converts print data set from the host and converts it into bit

image data and send to the MCU. Allows connection with one

host computers. Printer models

only

4 MCU (PCU) PWB Controls the image process section and the engine section.

5 High voltage power

PWB Outputs the high voltage for the image process section.

Controls the main motor.

6 Operation control PWB Displays the value information. Outputs the key operation

signal.

(11) Adjustment volume

No. Parts Note

Code Name Function/operation

1 VR1 Scanner lamp light quantity adjustment

volume Adjusts the scanner lamp light quantity.

2 VR601 Output voltage adjustment volume Adjust the DC output voltage (+24V).

VR801 Main charger voltage adjustment volume Adjusts the main charger voltage.

VR802 Developing bias voltage adjustment

volume Adjusts the developing bias voltage.

VR601 VR802

VR801

AL-841

– 3 –

[6] MACHINE OPERATION

Machine condition READY

LAMP

LINE

LAMP

3 GREEN

SEGMENT

LED

PRE-

HEAT

LAMP

JAM

LAMP

TONER

CERTRIDGE

REPLACE-

MENT LAMP

DRUM

CERTRIDGE

REPLACE-

MENT LAMP

Copy

lamp NOTE

Scanner operation

Scanning cannot be

performed. (OFFLINE) ON OFF — OFF OFF OFF OFF ON

Scanning can be

performed. (ONLINE) ON ON — OFF OFF OFF OFF ON

During scan/preview OFF ON — OFF OFF OFF OFF ON

[7] ADJUSTMENTS, SETTING

ADJ M9 Copy lamp light quantity adjustment

∗Location value

Range (MIN) 3.9 V

Range (MAX) 4.1 V

Standard value 4.0 V

Default 4.0 V

∗Program used

Test command (Simulation) MODE Normal

MAIN CODE 63

SUB CODE 1

∗Enforcement time

Enforcement

time JOB No Content

S 004/Ua

001/

P 002

When replacing the scanner

(copy) lamp control PWB

When replacing the copy lamp

In case of E7 (05) trouble

In case of E7 (04) trouble

In case of E7 (12) trouble

In case of E7 (15) trouble

Cycle —

Condition Normal copy exposure is not

obtained.

∗Necessary condition

1) The scanner section must be clean.

∗Job content

1) Put an oscilloscope between the check point JP2 (VIN) on the

MCU (PCU) PWB and GND.

At that time, trigger with the SH (JP3) signal to see the waveform

correctly.

2) Execute simulation 63-1. (The copy lamp lights up in the scanner

unit home position.)

JP2 (VIN) JP3 (SH)

JP1 (GND)

AL-841

– 4 –

3) Turn and adjust the volume on the copy lamp drive PWB so that

the CCD output waveform max. value is 4.0 ±0.1 V. ∗Trouble caused y improper operation

1) E7 (05) trouble

2) E7 (04) trouble

3) E7 (12) trouble

4) E7 (15) trouble

5) Copy exposure cannot be adjusted.

6) Copy exposure abnormality

∗Preliminary work

JOB No Content

S 004 Scanner (reading) section cleaning

∗After-work

JOB No Content

ADJ M1 Copy exposure adjustment

∗Necessary tools

Name Oscilloscope

Parts code/Price rank —

[8] SIMULATION (Test Command) ⋅USER PROGRAM

(2) Simulation list

Code Function (Purpose) Purpose Section Item

Main Sub

22 4 Used to check the number of total mis-feed (jam) in the

machine. Operation data output/

Check (Display/Print) Trouble Misfeed

14 Used to check the ROM version. Others Software

17 Used to check the copy count number. Operation data output/

Check (Display/Print) Counter Copier

18 Used to check the print count number. Operation data output/

Check (Display/Print) Counter Printer

21 Used to check the frequency of use (scanning) of the

scanner (reading). Operation data output/

Check (Display/Print) Optical (Image

scanning) Counter Scanner

24 1 Used to clear the mis-feed (jam) counter in the machine. Data clear Counter

8 Used to clear the copy counter. Data clear Counter Copier

9 Used to clear the print counter. Data clear Counter Printer

26 2 Used to set Enable/Disable of the SPF and the FAX

functions. (When a trouble occurs in the SPF and the

FAX section, disable those functions to allow only copying

and scanning functions.

Setting ADF/RADF/UDH/SPF Specifications

6 Used to set the specifications depending on destination. Setting Specifications Destination

7 Used to set the model (hardware) specifications. Setting PCU Specifications Operation mode

(Common)

(3) Details of simulations

22 -4

Purpose Operation data output/Check (Display/Print)

Function

(Purpose) Used to check the number of total mis-feed (jam) in

the machine.

Item Trouble Misfeed

Operation/

Procedure The JAM counter value is displayed in 3 digits ×2

times.

Display example: 12345

012 →Blank →345 →Blank →012

0.7s 0.3s 0.7s 1.0s 0.7s

22 -14

Purpose Others

Function

(Purpose) Used to check the ROM version.

Section PCU

Item Software

Operation/

Procedure The ROM version on the MCU PWB is displayed in 3

digits on the copy quantity display.

If any trouble occurs in the software operation, check

the version with this simulation.

4.0±0.1V

AL-841

– 5 –

22 -17

Purpose Operation data output/Check (Display/Print)

Function

(Purpose) Used to check the copy count number.

Item Counter Copier

Operation/

Procedure The display format and the method are same as SIM

22-5 (Total printer counter display).

22 -18

Purpose Operation data output/Check (Display/Print)

Function

(Purpose) Used to check the print count number.

Item Counter Printer

Operation/

Procedure The display format and the method are same as SIM

22-5 (Total printer counter display).

22 -21

Purpose Operation data output/Check (Display/Print)

Function

(Purpose) Used to check the count of use (count of scanning)

of the scanner (reading) unit.

Section Optical (Image scanning)

Item Counter

Operation/

Procedure The display system and the method are the same as

those of SIM 22-5 (Total print counter display).

24 -1

Purpose Data clear

Function

(Purpose) Used to clear the mis-feed (jam) counter in the

machine.

Item Counter

24 -8

Purpose Data clear

Function

(Purpose) Used to clear the copy counter.

Item Counter Copier

24 -9

Purpose Data clear

Function

(Purpose) Used to clear the print counter.

Item Counter Printer

26 -2

Purpose Setting

Function

(Purpose) Used to set Enable/Disable of the SPF and the FAX

functions. (When a trouble occurs in the SPF and the

FAX section, disable those functions to allow only

copying and scanning functions.

Section ADF/RADF/UDH/SPF

Item Specifications

Operation/

Procedure When this simulation is executed, the code of current

setup of ENABLE/DISABLE of SPF/FAX function is

displayed.

Enter the desired code number corresponding to Enable/Disable

setup and press the Start button, and the setup will be effective.

Set code number SPF/FAX function

0 Disable

1 Enable

26 -6

Purpose Setting

Function

(Purpose) Used to set the destination.

Item Specifications

Operation/

Procedure 1) The currently set code of the destination is

displayed.

2) To change the set content, enter the code of your desired

setting and press the start button.

Destination code Detected paper size

Set

value Destination Paper

type Paper width

detector ON Paper width

detector OFF

0Inch

series 11 58.5/

14 58.5 8.5 55.5/

8.5 511

1 EX Japan AB

series A4 (210 5

356 mm) A5

2 Japan AB

series A4 (210 5

356 mm) B5

When the set value is changed, the paper size specification and the

fixed, enlarged, and reduced copy magnification ratios are changed.

26 -7

Purpose Setting

Function

(Purpose) Used to set the model (hardware) specifications.

Section PCU

Item Specifications Operation mode (Common)

Operation/

Procedure When this simulation is executed, the monitor lamp

corresponding to the model (hardware) is displayed.

Copy quantity display Copy speed (CPM)

66cpm

88cpm

AL-841

– 6 –

AL-841

GND

MA-

MB-

24V

PUS

NC 1 1 NC 24V(DSW) 1

D-GND 2 2 D-GND DGND 2

D-GND 3 3 D-GND DGND 4

5V 4 4 5V 5V

5V 5 5 5V MEN- 5

3.3V 6 6 3.3V MMT1 6

1 HL-L (100V) 12V 7 7 12V MMTO 7

2HL-N (200V) FW 8 8 FW PIN 8

3HL-L (200V) PR 9 9 PR 3.3V 9

4 HL-N (100V) HL 10 10 HL 12V 10

24VH 11 11 24VH FW 11

24VH 12 12 24VH 24VH 12

P-GND 13 13 P-GND PGND 13

1 L-IN P-GND 14 14 P-GND PGND 14

2 L-OUT P-GND 15 15 P-GND MCON 15

3 N-IN P-GND 16 16 P-GND HLON 16

4 N-OUT 24V(DSW) 17 17 24V(DSW) TC/BIA

24V(DSW) 18 18 24V(DSW) PUS 18

24V(DSW) 19 19 24V(DSW) PR 19

PWNSIN 20

24V

24VS

POWER-SW

HEATER

DC-

BIASS

EARTH

DRUM

EARTH

CN805CN804

CN802 CN803

CN601

CN801

CN603

CN602

Power

supply

PWB

Developing cartridge

Photoconductor cartridge

Developing roller

Earth sheet

Main charger roller

Drum

Discharge brush

(Japan only)

Separation electrode

Main

motor

Copy roller

High

voltage

PWB

PID sensor

Temperature fuse

GND

PUS

[9] ACTUAL WIRING CHART

AL-841

– 7 –

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