Furuno FAX-410 - Manual (Page 24)

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3. Maintenance
３．１ Back-up battery
This device uses a manganese lithium battery as a back-up battery.
Please exchange to new one after using for 5 years.
Ask to a service shop for replacing the back-up battery.
３．２ Lubrication and Cleaning
(1) Lubrication
Lubricate a paper sending gear with 1-2 drops of lubricating oil at every 2-3
months.
(2) Cleaning
Clean the thermal head with attached cotton cleaner at every month.
When garbage has adhered to the thermal head, soak a little ethyl alcohol on
cloth and wipe it off. Don't use other than ethyl alcohol.