HP LaserJet 4 Service Manual - Page 429

primary device Application GDI DDI Ptr DVR IRLMP IRLAP IR Physical Transmitter ASCII Data Windows System Standard Windows LJ Printer Driver (SW) IR Redirector (Software) IR Driver Packetizes Data (SW or FW) Protocol Serializer IR Chip Data Packets & Queries Receiver Responses Formatter I/O Buffer IRLMP IRLAP IR Physical Receiver secondary device ASCII to Raster Data ASCII Data Buffer Unpacks Data Checks Packets Protocol Deserializer IR Chip Transmitter Figure B-5 IR Data Flow System Requirements • Hardware • Both the primary and secondary devices must be equipped with an IrDA-compliant IR component. Older, non-IrDA-compliant devices may not be compatible with the HP LaserJet 5/5M/5N printers. • Software • The primary device must be loaded during boot-up with software provided by the manufacturer for infrared operation. • The primary device must be properly configured with an infrared COM port, IRQ level, and base address value. • The infrared port must be installed and selected in the Printers section of the Windows Control Panel. • The SIR transceiver pod (C2929A) accessory must be purchased for the LaserJet 5, 5M, or 5N printer. LaserJet 5/5M/5N Printer B-35