HP 8550mfp Service Manual - Page 609

drums cleaning transfer 465 illustration 136 installing imaging 124 installing transfer 120 location 118 replace frequency 119 dual inline memory modules (DIMMs). See DIMMs (dual inline memory modules) duplex printing configuring 86 process 199 total page count 94 duplex registration 107, 416 Duplex Registration Menu 91 duplexer accessories 22, 512 adjusting registration 107 booklet printing 109 deflector 136 error 397 jams 389, 392 location 44 media specifications 35 printer model included with 22 dynamic random access memory (DRAM). See DRAM (dynamic random access memory) E ECCC (European Customer Care Center) Assist Line 67 ECO board 279 EIO (enhanced input/output) accessories parts list 512 buffer overflow 370 connection broken 371 features 23 initializing 397 not functional 398 printing page 83 slot locations 43 EIO hard disk parts list 512 EIO page using to verify installation 105 eject rollers (multi-bin mailbox) 210 ejector motor (multi-bin mailbox) 209 electrical schematics 503 specifications 24 systems 164 electrostatic discharge (ESD) 222 electrostatic latent image 143, 144 embossed media 37 emissions acoustic 25 ozone 58 empty tray 413 engine settings 94 test 398 enhanced input/output (EIO). See EIO (enhanced input/output) envelopes cautions for printing 35 sealed 434 See also media environmental automatic change control 159 operating requirements 27 specifications 24 EP process. See image formation EPH (external paper-handling) controller board 199, 207 error log 469 errors 2,000-sheet input unit 384, 385 breaks and pauses 95 carousel 377 controller 386 cycle power 382 density sensor 378 DIMM 376 firmware 373 flipper 480 fuser 373 illegal output 379 input feed 379 internal 383 laser 375 laser scanner 371 messages 368 motor 383 multi-bin mailbox 384, 386 NVRAM 387, 481 PostScript printing 88 power-on self-test 387 RAM 383, 384 scan buffer 384 ESD (electrostatic discharge) 222 Ethernet accessories 512 network connection 76 European Customer Care Center (ECCC) Assist Line 67 event log 407 clearing 94 description 419 printing 83 exchanging parts 63 Executive-sized media. See media expanding memory 22 EN Index 607