DOWNLOAD Sharp AL-2020 (serv.man2) Service Manual ↓ Size: 5.06 MB | Pages: 92 in PDF or view online for FREE

AL-2040  SIMULATION, TROUBLE CODES  10 - 17

64

01

Self print
Print of one page is made regardless of the status of the optical system.
(Operating procedure)
When this simulation is executed, warm-up is performed and the ready lamp is lighted. Enter the code number with the 10-key, 
and select the cassette with the cassette select key and press the PRINT switch, and paper feed operation will be made from 
the selected cassette and printing of the selected pattern will be made. Printing is in 1by2 mode, or grid pattern.

67

50

USB receive speed adjustment (USB1.1)
Used to set the limitation on the print data receive speed of USB2.0 (Full speed) port (USB port on the machine).
→ When print images from USB2.0 (Full speed) port are disturbed, change the setting and try again.
When this simulation is executed, the currently set code number is displayed.
Enter the code number corresponding to the adjustment value, and press START key to change the setting.

Main 
code

Sub 

code

Content

Code number

Pattern

0

1by2

1

Grid pattern

2

White paper

3

Black background

Code number

Setting

Speed

1

FAST

↑ Fast

2

NORMAL1

3

NORMAL2

4

SLOW

↓ Slow

Main 
code

Sub 

code

Details of trouble

E7

01

Duplex model memory setup error, memory not-
detected error

02

LSU trouble

10

Shading trouble (Black correction)

11

Shading trouble (White correction)

16

Abnormal laser output

F5

02

Copy lamp lighting abnormality

H2

00

Thermistor open

H3

00

Heat roller high temperature detection

H4

00

Heat roller low temperature detection

L1

00

Feeding is not completed within the specified time 
after starting feeding. (The scan head locking switch 
is locked)

L3

00

Scanner return trouble

L4

01

Main motor lock detection

32

Exhaust fan motor lock detection trouble

L6

10

Polygon motor lock detection

U2

04

EEPROM read/write error (Serial communication 
error)

11

Counter check sum error (EEPROM)

Main 
code

Sub 

code

Details of trouble

E7

01

Content Duplex model memory setup error, memory 

not-detected error

Detail

The memory is not set properly or the 
memory capacity is not set to the duplex 
setup (6M).

Check 
and 
remedy

Set SIM 26-39 code number to 2.

02

Content LSU trouble

Detail

The BD signal from the LSU cannot be 
detected in a certain cycle. (Always OFF or 
always ON)

Cause

LSU connector or LSU harness defect or 
disconnection
Polygon motor rotation abnormality
Laser beams are not generated.
MCU PWB abnormality.

Check 
and 
remedy

Check connection of the LSU connector.
Execute SIM 61-03 to check the LSU 
operations.
Check that the polygon motor rotates 
normally.
Check that the laser emitting diode 
generates laser beams.
Replace the LSU unit.
Replace the MCU PWB.

10

Content Shading trouble (Black correction)

Detail

The CCD black scan level is abnormal 
when the shading.

Cause

Improper connection of the CCD unit flat 
cable
CCD unit abnormality
MCU PWB abnormality

Check 
and 
remedy

Check connection of the CCD unit flat 
cable.
Check the CCD unit.

AL-2040  SIMULATION, TROUBLE CODES  10 - 18

E7

11

Content Shading trouble (White correction)

Detail

The CCD white scan level is abnormal 
when the shading.

Cause

Improper connection of the CCD unit flat 
cable
Dirt on the mirror, the lens, and the 
reference white plate
Copy lamp lighting abnormality
CCD unit abnormality
MCU PWB abnormality
(When occurred in the SPF scan position.)
Improper installation of the mirror unit

Check 
and 
remedy

Clean the mirror, lens, and the reference 
white plate.
Check the light quantity and lighting status 
of the copy lamp (SIM 05-03).
Check the MCU PWB.

16

Content Abnormal laser output

Detail

When the laser output is stopped, HSYNC 
is detected.

Cause

Laser abnormality
MCU PWB abnormality.

Check 
and 
remedy

Check the laser emitting diode operation.
Replace the MCU PWB.

F5

02

Content Copy lamp lighting abnormality

Detail

The copy lamp does not turn on.

Cause

Copy lamp abnormality
Copy lamp harness abnormality
CCD PWB harness abnormality.

Check 
and 
remedy

Use SIM 5-3 to check the copy lamp 
operations.
When the copy lamp lights up.
Check the harness and the connector 
between the CCD unit and the MCU PWB.
When the copy lamp does not light up.
Check the harness and the connector 
between the copy lamp unit and the MCU 
PWB.
Replace the copy lamp unit.
Replace the MCU PWB.

H2

00

Content Thermistor open

Detail

The thermistor is open.
The fusing unit is not installed.

Cause

Thermistor abnormality
Control PWB abnormality
Fusing section connector disconnection
The fusing unit is not installed.

Check 
and 
remedy

Check the harness and the connector 
between the thermistor and the PWB.
Use SIM 14 to clear the self diagnostic 
display.

Main 
code

Sub 

code

Details of trouble

H3

00

Content Heat roller high temperature detection

Detail

The fusing temperature exceeds 240°C.

Cause

Thermistor abnormality
Control PWB abnormality
Fusing section connector disconnection.

Check 
and 
remedy

Use SIM 5-02 to check the heater lamp 
blinking operation.
When the lamp blinks normally.
Check the thermistor and its harness.
Check the thermistor input circuit on the 
control PWB.
When the lamp keeps ON.
Check the power PWB and the lamp control 
circuit on the MCU PWB.
Use SIM 14 to clear the self diagnostic 
display.

H4

00

Content Heat roller low temperature detection

Detail

1) When the target temperature (165°C) is 

not reached in 55 sec after starting 
warming-up.

2) When the temperature below 100°C is 

detected for 300ms under the ready 
print state.

∗ "Starting warming-up" means not only 

that in power supply but also reset that in 
reset from shut-off and in side door 
close. (The timing of generating H4 is not 
limited to that in power supply.)

Cause

Thermistor abnormality
Heater lamp abnormality
Thermostat abnormality
Control PWB abnormality

Check 
and 
remedy

Use SIM 5-02 to check the heater lamp 
blinking operation.
When the lamp blinks normally.
Check the thermistor and its harness.
Check the thermistor input circuit on the 
control PWB.
When the lamp does not light up.
Check for disconnection of the heater lamp 
and the thermostat. Check the interlock 
switch.
Check the power PWB and the lamp control 
circuit on the MCU PWB.
Use SIM 14 to clear the self diagnostic 
display.

Main 
code

Sub 

code

Details of trouble

AL-2040  SIMULATION, TROUBLE CODES  10 - 19

L1

00

Content Feeding is not completed within the 

specified time after starting feeding. (The 
scan head locking switch is locked)

Detail

The white area and the black marking on 
the shading plate are used to obtain the 
difference in the CCD level values for 
judgment of lock. When the difference in 
the levels of which and black is small, it is 
judged that the black mark could not be 
scanned by lock and the trouble code “L1” 
is displayed.

Cause

The scan head is locked by the lock switch.
Mirror unit abnormality
The scanner wire is disconnected.
The origin detection sensor abnormality
Mirror motor harness abnormality

Check 
and 
remedy

Check to confirm that the scan head lock 
switch is released.
Use SIM 1-1 to check the mirror 
reciprocating operations.
When the mirror does not feed.
Check for disconnection of the scanner 
wire.
Check the harness and the connector 
between the mirror motor and the MCU 
PWB.
Replace the mirror unit.
Replace the MCU PWB.
When the mirror does feed.
Use SIM 1-2 to check the mirror home 
position sensor.

L3

00

Content Scanner return trouble

Detail

When the mirror base is returned for the 
specified time (6 sec) in mirror initializing 
after turning on the power, the mirror home 
position sensor (MHPS) does not turn ON. 
Or when the mirror base is returned for the 
specified time (about 6 sec) after start of 
copy return, the mirror home position 
sensor (MHPS) does not turn ON.

Cause

Mirror unit abnormality
Scanner wire disconnection
Origin detection sensor abnormality
Mirror motor harness abnormality

Check 
and 
remedy

Use SIM 1-1 to check the mirror 
reciprocating operations.
When the mirror does not return.
Check for disconnection of the scanner 
wire.
Check the harness and the connector 
between the mirror motor and the MCU 
PWB.
Replace the mirror unit.
Replace the MCU PWB.
When the mirror does feed.
Use SIM 1-2 to check the mirror home 
position sensor.

Main 
code

Sub 

code

Details of trouble

L4

01

Content Main motor lock detection

Detail

When the main motor encoder pulse is not 
detected for 100 msec.

Cause

Main motor unit abnormality
Improper connection or disconnection the 
main motor and the harness.
MCU PWB abnormality

Check 
and 
remedy

Use SIM 25-01 to check the main motor 
operations.
Check connection of the main motor 
harness/connector.
Replace the main motor.
Replace the MCU PWB.

32

Content Exhaust fan motor lock detection trouble

Detail

The error detection is started after 2 sec 
from starting rotation of the exhaust fan 
motor.
1) The continuous rotation state of 250ms 

is not detected for 1 sec after starting 
detection.

2) When the lock sensor (in the exhaust 

fan) detects the HIGH level (unstable) 
after detection the lock state (stable 
state).

Cause

Exhaust fan motor connector connection 
trouble
Exhaust fan motor trouble
MCU PWB trouble

Check 
and 
remedy

Exhaust fan motor connector connection 
check
Exhaust fan motor replacement
Replace the MCU PWB.

L6

10

Content Polygon motor lock detection

Detail

The lock signal (specified rpm signal) does 
not return within a certain time (about 20 
sec) from starting the polygon motor 
rotation.

Cause

Polygon motor unit abnormality
Improper connection or disconnection of 
the polygon motor and the harness.
MCU PWB abnormality

Check 
and 
remedy

Use SIM 61-1 to check the polygon motor 
operations.
Check connection of the polygon motor 
harness/connector.
Replace the polygon motor.
Replace the MCU PWB.

U2

04

Content EEPROM read/write error (Serial 

communication error)

Detail

EEPROM access process error

Cause

EEPROM abnormality

Check 
and 
remedy

Check that the EEPROM is properly set.
Use SIM 16 to cancel the trouble.
Replace the MCU PWB.

11

Content Counter check sum error (EEPROM)

Detail

Check sum error of the counter area in the 
EEPROM

Cause

EEPROM abnormality

Check 
and 
remedy

Check that the EEPROM is properly set.
Use SIM 16 to cancel the trouble.
Replace the MCU PWB.

Main 
code

Sub 

code

Details of trouble

AL-2040  USER PROGRAMS  11 - 1

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

Reduces toner consumption by approximately 10%.

The unit has two power save modes of operation: preheat mode
and auto power shut-off mode.

When the unit enters the preheat mode, the power save (

) indi-

cator will light up and other indicators will remain on or off as
before. In this condition, the fuser in the unit is maintained at a
lower heat level, thereby saving power. To copy from the preheat
mode, make desired copier selections and press the start (

)

key using the normal copying procedure.

When the unit enters the auto power shut-off mode, the power
save (

) indicator will light up and other indicators except the

ONLINE indicator will go out. The auto power shut-off mode saves
more power than the preheat mode but requires a longer time
before starting copying. To copy from the auto power shut-off
mode, press the start (

) key. Then make desired copier selec-

tions and press the start (

) key using the normal copying proce-

dure.

The unit returns to the initial settings a preset amount of time after
the end of job.

This preset amount of time (auto clear time) can be changed.

You can set the copy resolution used for AUTO and MANUAL
(

) exposure mode.

1) Press the exposure mode selector key to select the MANUAL

(

) mode.

2) Press and hold down the exposure mode selector key for

approximately 5 seconds. The MANUAL (

) indicator will

go out and the PHOTO (

) indicator will begin to blink. The

light and dark indicator marked "5" will light up, indicating the
standard toner mode is active.

3) To enter the toner save mode, press the light (

) key. The

light and dark indicator marked "1" will light up, indicating the
toner save mode is selected.

4) Press the exposure mode selector key. The PHOTO (

)

indicator will stop blinking and light up steadily. The light and
dark indicator marked "3" will light up. The toner save mode is
now active.

Note: To return to the standard mode, repeat the procedure but

use the dark (

) key to select exposure level "5" in step

3).

The user programs allow the parameters of certain functions to be
set, changed, or canceled as desired.

1) Press and hold down the light (

) key simultaneously for

more than 5 seconds until all the alarm indicators (

, 

,

) blink and "

" appears in the display.

2) Use the left copy quantity (

) key to select a user program

number (1: Auto clear time, 2: Preheat mode, 3: Auto power
shut off mode, 4: Auto power shut off timer, 6: SPF automatic
original discharge time, 10: Resolution of AUTO & MANUAL
mode, 21: Reset factory, 24: Prevention of OC copies when
the SPF is up function, 25: Copy effective paper width setting
function (Bypass tray), 26: Copy effective paper width setting
function (Tray), 28: Selection of copy start state (Polygon rota-
tion on/off), 29: Fusing temperature setting when the bypass
tray is used). The selected number will blink in the left side of
the display.

3) Press the start (

) key. The entered program number will be

steadily lit and the currently selected parameter number for the
program will blink on the right side of the display.

4) Select the desired parameter using the right copy quantity

(

) key. The entered parameter number will blink on the

right of the display.

Program 

No.

Mode

Parameters

1

Auto clear time

1 

→ 10 sec., 2 → 30 sec., 

*3 

→ 60 sec., 4 → 90 sec., 

5 

→ 120 sec., 6 → OFF

2

Preheat mode

*1 

→ 30 sec., 2 → 60 sec., 

3 

→ 5 min., 4 → 30 min., 

5 

→ 60 min., 6 → 120 min., 

7 

→ 240 min.

3

Auto power shut off mode

*1 

→ ON, 2 → OFF

4

Auto power shut off timer

*1 

→ 5 min., 2 → 30min., 

3 

→ 60 min., 4 → 120 min., 

5 

→ 240 min.

6

SPF automatic original 
discharge time

1 

→ 5 min., *2 → 30 min., 

3 

→ 60 min., 4 → 120 min., 

5 

→ 240 min., 6 → OFF

10

Resolution of AUTO & 
MANUAL mode

*1 

→ 300dpi, 2 → 600dpi

21

Reset factory

1 

→ YES, *2 → NO

24

Prevention of OC copies 
when the SPF is up 
function

*1 

→ ON, 2 → OFF