Avision @V2800 - Manual (Page 121)

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Check printer
cable or status. 1. Check if the printer cable has been correctly connected.
2. Check if the printer is turn on.
3. Restart the product and your printer.
4. If the message still appears, contact your nearest dealer.
Detect printer
error Please turn the printer off and on before you turn the
scanner on.
Paper size not
supported Please set the supported paper size to the tray of the
printer. HLT and * are not supported.