HP 1050c Service Manual - Page 303

Functional Overview Interface Specifications Below are the parallel interface specifications. For specifications of the HP JetDirect Print Server (Network Interface), see the JetDirect Print Server documentation supplied with the Print Server Interface or consult your dealer. Parallel (IEEE-1284 compatible/Centronics) Interface The connector on the printer is 36-pin female. Most existing parallel cables support IEEE-1284 compatible communication, but for use with this printer, the cable must meet the specification in this table. Pin 1 2 ... 9 10 11 12 13 14 16 19 ... 30 31 32 36 Wire/Signal Name Source Strobe computer D0 ... D7 (data both lines) Ack printer Busy printer PError printer Select (SelectOut) printer AutoFd computer GND GND Init computer Fault printer SelectIn computer The following cable is recommended for optimum performance and electromagnetic compatibility: Recommended Cable for PCs and Unix Systems Interface type (Computer) HP part number IEEE compatible/Centronics Interface (All) C2951A Cable length 3.0 m Connector type at computer end of cable 25-pin male NOTE There is a small serial port at the rear of the printer, this is there for manufacturing purposes only and cannot be used to print. HP DesignJets 1050C and 1055CM Printers Service Manual 10-17