U
Unit interface, II–221
Unpacking the printer, I–35
Upgrading software, I–228, I–231
User Maint option, service levels, I–68
Utility program, lasr2fls, I–228
V
Vacuum cleaners, recommended models, I–30
Vacuum fan (VAF) transfer assembly, I–276
Vacuum fan, MC board, I–212
Varistor
main charger, I–304
transfer/transport unit, I–279
Voltage setting, power supply, I–60
W
WAITING FOR / PROGRAM DOWNLOAD, I–122
Waste toner
bottle, I–249
bottle (box) unit, I–252
bottle full sensor (WTBF), I–250
bottle set sensor (WTBS), I–251
monitoring, theory, II–155
recovery unit, I–248
Waste toner bottle, installation, I–52
Waste Toner Full (Error 28), I–153
I–372