Roland VersaEXPRESS RF-640 Service Notes page 242

Consumable Parts and
Replacement Cycle
Parts Name
Print Head
Wiper
Felt Wiper
Cap Top
Wiper Scraper
Scan Motor
Ink Tube
Sponge for Wipers
Lithium Battery
Pinch Roller
Replacement Cycle
6 billion shots / nozzle (6,000,000 kshots)
Wiping 3000 times
Wiping 800 times
6 months (ECO-SOL MAX) 24 months (FPG)
12 months
3000 hours
3000 hours
Replace it appropriately diagnosing from the appearance of it
24 months
Replace it depending on the wear of the rubber part
6-12