How to mend Geller Sx580

Hello i have Geller SX580 and shows key op error .how disolve this problem?

How can I mend my cash register?

How can I mend my geller cash register , says no-cl?

how do i change the venue name?

How do I replace the dry cell battery in my Geller AX 100?

I have a E6 fault on a Geller AX-200 Till?

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I have a geller sx-580 ?

I have a geller fx-400 cash register?

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How can I fix Geller SX 580 cash register printer error ?

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items added to Geller SX-580?

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more explanation geller SX-580?

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