For those about a manual with error code solutions, C-tech has the one that covers these codes: E01, E02, E03, E04, E06, E07, E08, E09, E10, E11, E12, E13, E14, E17, E18, E19, E25, E26. It has remedies for each of the codes. You can find it here:
http://the-checkout-tech.com/manuals/cashregisters/Casio_TK-1300_operation_manual.html
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