Error code U2 on a AR201 copier

toner chip not recognised so need replace toner cartridge.

http://olsonbros.com/sharp/support/sim.html

U2 04 EEPROM read/write error (serial communication
error)
11 Counter check sum error (EEPROM)
12 Adjustment value check sum error (EEPROM)
40 CRUM chip communication error

EEPROM error , need to order a new EEPROM from Japan, or a mainbord issue
need to replace , no reset available

Check EEPROM for proper set-up
To prevent the erasure of counter data
and adjustment values, write down the
counter data and adjustment values by
simulation. (If there is a printer option,
execute SIM23-1 and note counter
data/adjustment values.)
Clear U2 trouble with SIM16.
Replace PCU PWB.

press 0 U2 if 04 occurs EEPROM read/write error (serial communicationerror) if 11 occurs Counter check sum error (EEPROM) if 12 occurs Adjustment value check sum error (EEPROM) if 40 occurs CRUM chip communication error

U2 04 EEPROM serial communication error
11 Counter check sum error
12 Adjustment value check sum error (EEPROM)
40 CRUM communication error

this the U2 Code Error

U2 00 EPROM error 11 EPROM error





U2 04 EEPROM serial communication error 11 counter check sum error 12 adjustment value check sum error(EEPROM) 40 CRUM communication error

U2 04 EPROM error 11 Main counter error 12 EPROM error

U2 04 EEPROM serial communication error 11 counter check sum error 12 adjustment value check sum error(EEPROM) 40 CRUM communication errorYou need the service help. It is no a distans work Good luck)

Content Counter check sum error (EEPROM)
Detail Checksum error in counter data area
Cause EEPROM defective
Control circuit hung up due to noise
Defective EEPROM access circuit on
PCU PWB
Check Check EEPROM for proper set-up
and To prevent the erasure of counter data
remedy and adjustment values, write down the
counter data and adjustment values by
simulation. (If there is a printer option,
execute SIM23-1 and note counter
data/adjustment values.)
Clear U2 trouble with SIM16.
Replace PCU PWB.

U2 RAM error
U2-00 EPROM error
U2-01 Counter error
U2-01 Memory back-up battery dead
U2-04 EPROM error
U2-11 Main counter error
U2-12 EPROM error

As you can see there are many U2 error codes. Needless to say, find your code and the replace the bad part. The battery is on the main board. The EPROM is on the main board.
If you find your code, replace the part and error still remains -- replace main board.

To find out the sub code for the U2 error hold down the Start key. Below is a list of the errors:
U2-04 EEPROM serial communication error
U2-11 Counter check sum error
U2-12 Adjustment value check sum error (EEPROM)
U2-40 CRUM communication error

To clear the U2-40 error try pulling out the toner cartridge and firmly reinstalling it. If that doesn't work you must install a new toner cartridge. There is a CRUM chip on the cartridge that keeps up with how many impressions have been made with that cardridge. You cannot "refill" these cartridges without replacing the CRUM. This problem occurs frequently with remanufactured cartridges.

To clear other U2 errors you must enter simulation mode.
Perform the following procedure to enter the simulation mode.
Clear key - Interrupt key - "0" key - Interrupt key - 16 - Start key - Start key. The unit should reset.