A-16 Phaser 6121MFP Service Manual
Reference
Acronyms and Abbreviations
Acronym Description
A3 Paper size 297 millimeters (11.69 inches) x 420 
millimeters (16.54 inches).
A4 Paper size 210 millimeters (8.27 inches) x 297 
millimeters (11.69 inches).
A5 Paper size 148 millimeters (5.82 inches) x 210 
millimeters (2.10 inches).
AC Alternating Current is type of current available at 
power source for the printer.
ADC Automatic Density Control
AMPV Average Monthly Print Volume
APC Auto Power Control
ASSY Assembly
ATM Adobe Type Manager
BCR Bias Charge Roller
BOOTP Boot Parameter Protocol
BTR Bias Transfer Roller
CCD Charge Coupled Device (Photoelectric Converter)
CCW Counter-Clock Wise
CMYK Toner colors for the printer:
Y=yellow, C=cyan, M=magenta, K=black
CRU Customer Replaceable Unit
CRUM Customer Replaceable Unit Meter/Memory
CST Cassette
dB Decibel
DC Direct Current
DDNS Dynamic Domain Name System
DDR2 DIMM Double Data Rate Dual In-Line Memory Module
DEV Developer
DHCP Dynamic Host Configuration Protocol
DPI Dots Per Inch
DRV Drive
DUP Duplex
Duplex 2-sided printing
EA Emulsion Aggregation (Toner)
EEPROM Electrically Erasable Programmable Read-Only 
Memory