How do I clear the spanner error on a thoshiba e studio 120

The Code H-4 Mean the copier needs to be reset. Also I have added a link to help you troubleshoot the copier.
Thread Toshiba studio 120 with error code H4

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0+8>252="0"

I think the cable is not connected properly on the developer unit...Open front cover, take out the waste toner box, and u will see the connector.

how do I clear a spanner

OK now key ( 8 + Clear ) to know the error code

close all doors & try again

How to reset spanner indication in Toshiba e-studio 163

Hi, the two main reasons for the Maint error light (spanner) to come on are the toner warning when it reaches 10% full and the developer when it reaches 25k count. The light can only be reset by entering one of the pre programmed simulations on the machine and clearing the error.

What is the error code?
PS: press clear+8

Hello sir; The error code you display F-120 it means "data base" problem it can not be reset you have to replace either memory chip or hard drive.