Page: 14Service Guide ML390/391Chapter 1 Product Specifications1.11 RELIABILITY SPECIFICATIONS1.11.01 Mean Time Between Failures (MTBF)· 5000 hrs @ 25% duty cycle, 35% page density1.11.02 Mean Time To Repair (MTTR)· 15 minutes @ major sub-assembly level1.11.03 Printer Life· 12,000 hrs @ 25% duty cycle, 35% page density1.11.04 Ribbon Life· 2 million characters1.11.05 Printhead Life· 200 million characters in 10 cpi utility print quality. 35% page density and 25% duty cycleCopyright 1997, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA BusinessPartner Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)
