Microtek Converter - Manual (Page 46)

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5-4. Specific firmware revision for specific SCSI device
Printers:
Fuji Pictrography Series(PG3000,PG3500,PG4000,PG4000II,PG4500)
Firmware 1.23 works better than 1.33 (MacOS X only)
If you have any question about firmware update, contact our tech support.
http://www.ratocsystems.com/english/contact/support.html