HP LaserJet 4 Service Manual - Page 16

Product Family Information The model HP C2021A is identical to the model HP C2001A from a hardware standpoint, as is the model HP C2039A to the model HP C2037A. The models HP C2021A and C2039A printers include the following features: • PostScript Level 2 SIMM • AppleTalk MIO Card • 4 MBytes of RAM In every instance the repair procedures for all products are similar. Some LaserJet 4 accessories are compatible with the LaserJet 4 Plus and some are not. The compatibility chart below may be used when there is a question of accessory compatibility. Table 1-2 Product Family Compatibility Matrix Accessory C2082A C2082B C2083A C2083D C2085A C2085D C3129A C2080A C2063A C2064A C2065A C2066A C3130A * C3131A * C3132A* C3133A* C3146A * C3157A 92298A Description Envelope Feeder Envelope Feeder Optional 500 Sheet Feeder Assembly Optional 500 Sheet Feeder Assembly 250 Sheet Universal PC tray 250 Sheet Universal PC tray PostScript SIMM PostScript SIMM Memory (1 MByte) Memory (2 MByte) Memory (4 MByte) Memory (8 MByte) Memory (1 MByte) Memory (2 MByte) Memory (4 MByte) Memory (8 MByte) Memory (16 MByte) Duplex Assembly Toner Cartridge Does it work in the HPLaserJet 4? Yes Yes Yes Yes Yes No No Yes Yes Yes Yes Yes No No No No No No Yes Does it work in the HPLaserJet 4 Plus? No Yes No Yes No Yes Yes No Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes *If HP LaserJet 4 Plus Optional Memory (C3130A, C3131A, C3132A, C3133 or C3146A) is installed in the HP LaserJet 4, the printer will display a "53.1X.08 ERROR" (X indicates the position of the SIMMs slot). 1-2 Product Information