U2-90 U2-91 on MX3100

[ben@km]

Hello everyone,
I'm dealing with an increase (weekly now) of these 2 code on a bunch of MX3100n. We have a fleet (more than a hundred) of these MFP in different location now from close to 4 years. We replace some PCU, PCU EEPROM (Sharp had to program it). But we can not keep the pace... As anyone deal with this code and got through without replacing EEPROM.

[Akitu]

I got some info from a very reliable source.

Confirm you have good power going to the equipment, any U2 code with sub-code can definitely be related to unstable power. This is the most common cause of a U2 code.
Confirm you have the latest part number Motherboard, and good condition DC power supply board.
To permanently clear this code (in most cases, providing the above 2 conditions are also met), leave main side door open, backup ALL to HDD via sim 56-01. Perform a device clone as well. Once complete, run Sim 16, Sim 14, perform the emergency firmware installation and then run HDD to ALL again in sim 56-01. Restart and you should be OK. This procedure 'reinitializes' the eeproms without replacing them.

Whenever you order new EEPROMs from Sharp, make sure to order a new MFP and PCU EEPROM as they're created as a set.

[jakobmuis]

Hello everyone,
I'm dealing with an increase (weekly now) of these 2 code on a bunch of MX3100n. We have a fleet (more than a hundred) of these MFP in different location now from close to 4 years. We replace some PCU, PCU EEPROM (Sharp had to program it). But we can not keep the pace... As anyone deal with this code and got through without replacing EEPROM.

It is possible to reset all three EEPROM's in "hidden code"

At first save HDD and SRAM onto a USB-stick with code 56-02!!
Then enter "hidden Code"
Copier must be in "copy-mode", enter #*CA#.
Then enter code 80-09.
Choose all three EEPROMS and touch "Execute"
When finished the machine will be in original factorysettings.
Enter the code 56-02 and replace the settings with the settings saved on the USB-stick.
Now the machine will act as before without U-code!!
Good luck!

[Akitu]

It is possible to reset all three EEPROM's in "hidden code"

At first save HDD and SRAM onto a USB-stick with code 56-02!!
Then enter "hidden Code"
Copier must be in "copy-mode", enter #*CA#.
Then enter code 80-09.
Choose all three EEPROMS and touch "Execute"
When finished the machine will be in original factorysettings.
Enter the code 56-02 and replace the settings with the settings saved on the USB-stick.
Now the machine will act as before without U-code!!
Good luck!

It's people like you that made Sharp change the elevated sims, and now no one has them.

[faxman28]

It's people like you that made Sharp change the elevated sims, and now no one has them.

yea I think if you do what is in that elevated sim procedure it will kill all three of those boards, had a tech do it on smaller machine thinking it would fix a problem, it cleared out all the page counts and machine wouldn't recognize toner cart, had to replace mcu, pcu and scn pwb.