DOWNLOAD Sharp AL-2021 Service Manual ↓ Size: 12.48 MB | Pages: 120 in PDF or view online for FREE

AL-2041  SIMULATION, TROUBLE CODES  10 - 25

F2

74

Content Toner cartridge CRUM error
Detail

PCU

Cause

Toner cartridge (CRUM) trouble.
PCU PWB trouble.
Connector/harness trouble.

Check 
and 
remedy

Replace the toner cartridge.
Replace the PCU PWB.
Connector and harness check.

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.

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.

Main 
code

Sub 

code

Details of trouble

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.

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.

Main 
code

Sub 

code

Details of trouble

AL-2041  SIMULATION, TROUBLE CODES  10 - 26

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.

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.

31

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.

Main 
code

Sub 

code

Details of trouble

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 25-10 to check the polygon motor 
operations.
Check connection of the polygon motor 
harness/connector.
Replace the polygon motor.
Replace the MCU PWB.

U2

00

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-2041  USER PROGRAM  11 - 1

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

1) Press and hold down the light (

) key for more than 5 sec-

onds until all the alarm indicators (

,

,

) blink and "

"

appears in the display.

2) Use the left copy quantity (

) key to select a user program

number (For the user program numbers, see the following
table.).
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 dis-
play.

* Factory default settings are indicated with an asterisk (*).

5) Press the start (

) key. The right-hand number in the display

will be steadily lit and the entered value will be stored.

Note: To change the setting or to set another mode, press the

clear key. The unit will return to step 2.

6) Press the light (

) key to return to the normal copy mode.

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 → 30 min., 

3 

→ 60 min., 4 → 120 min., 

5 

→ 240 min.

6

SPF automatic original 
discharge time 
(AL-2031/2041)

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

13

Memory for printer

1 

→ 30%, 2 → 40%, 

*3 

→ 50%, 4 → 60%, 

5 

→ 70%

21

Reset factory

1 

→ YES, *2 → NO

22

Sort auto select 
(AL-2031/2041)

*1 

→ ON, 2 → OFF

24

Prevention of OC copies 
when the original cover/
SPF is up function

*1 

→ ON, 2 → OFF

25

Copy effective paper 
width setting function 
(Bypass tray)

*1 

→ Large 

(LETTER/A4 width),
 2 

→ Small 

(INVOICE/B5R width)

26

Copy effective paper 
width setting function 
(Paper tray)

*1 

→ Large 

(LETTER/A4 width), 
2 

→ Small 

(INVOICE/B5R width)

28

Selection of copy start 
state (Polygon rotation 
on/off)

*1 

→ ON, 2 → OFF

29

Fusing temperature 
setting when the bypass 
tray is used

1 

→ Low, *2 → High

32

USB 2.0 mode switching

1 

→ Full-Speed, 

*2 

→ Hi-Speed

AL-2041  CHECKING THE TONER LEVEL  12 - 1

The toner level is indicated by a 6-level display. Use it as a guideline
for replacing the toner cartridge.

1) Hold down the light (

) key until the alarm indicators

(

,

,

) blink. 

The display will show "- -".

2) Hold down the Copy ratio display (%) key for more than 5 sec-

onds.
The approximate quantity of toner remaining will be indicated in
the display as a percentage. ("100", "75", "50", "25", "10" is dis-
played.)
When the percentage is less than 10%, "LO" will be displayed.

3) Press the light (

) key to return to the normal display.

The alarm indicators (

,

,

) go off.

The display returns to the number of copies display.