HP — HP Color LaserJet Enterprise M750 Service Manual

Sign In menu .................................................................................................................................... 247 Retrieve Job From USB menu ......................................................................................................... 247 Retrieve Job From Device Memory menu ....................................................................................... 247 Supplies menu .................................................................................................................................

248 Trays menu ...................................................................................................................................... 250 Administration menu ...................................................................................................................... 251 Reports menu ............................................................................................................... 251 General Settings menu ................................................................................................. 251 General Print Settings menu ........................................................................................

255 Default Print Options menu .......................................................................................... 256 Display Settings menu .................................................................................................. 258 Manage Supplies menu ................................................................................................ 259 Manage Trays menu ..................................................................................................... 260 Network Settings menu ................................................................................................

261 Troubleshooting menu ................................................................................................................... 264 Device Maintenance menu .............................................................................................................. 265 Backup/Restore menu .................................................................................................. 265 Calibration/Cleaning menu ........................................................................................... 266 USB Firmware Upgrade menu ......................................................................................

266 Service menu ................................................................................................................ 267 Troubleshooting process .................................................................................................................................. 268 Determine the problem source ....................................................................................................... 268 Pre-troubleshooting checklist ..................................................................................... 268 Troubleshooting flowchart ..........................................................................................

269 Power subsystem ............................................................................................................................ 271 Power-on checks .......................................................................................................... 271 Power-on troubleshooting overview ......................................................... 271 Tools for troubleshooting ................................................................................................................................. 273 Component diagnostics ..................................................................................................................

273 LED diagnostics ............................................................................................................. 273 Engine diagnostics ........................................................................................................ 276 Understand lights on the formatter .......................................................... 273 Defeating interlocks ................................................................................... 277 Disable cartridge check .............................................................................. 278 Engine test button ......................................................................................

279 Paper-path test ............................................................................................................ 279 Manual sensor test ....................................................................................................... 280 Front-door opening/closing switch (PS14) ............................................... 281 Right-door opening/closing sensor (PS15) ............................................... 282 TOP (top-of-page) sensor (PS5) ................................................................ 284 Fuser loop sensors 1 and 2 (PS7 and PS8) ................................................ 285 ENWW xi