Oki OKIOFFICE 84 Service Manual page 245

Reliability Table (6.1.1)
No. Item
1 Document feeder
2 Recording paper
feeder
3 MTBF
4 Battery (for RTC)
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Service Guide OKIOFFICE 84
Chapter 6 Cleaning and Maintenance
Specifications
Jam occurrence and misfeeds in the automatic document
feeder will be less than one in 500 operations for all
specified documents.
Jam occurrence in the automatic paper feeder will be less
than one in 1,500 operations and misfeeds will be less
than one in 500 operations for all specified recording
paper.
The MTBF for the overall machine will exceed 3,000 hours
of actual operation.
The MTBF will be measured at a confidence level of 95%
under controlled laboratory conditions.
The MTBF will be based on 50% transmit and 50%
receive activities.
5 years
Lithium battery: Not rechargeable
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