Telnet client ................................................................................................ 116 Network connection ................................................................................... 117 Connect a remote connection ...................................................................................... 117 Disconnect a remote connection .................................................................................. 122 Troubleshooting process ..................................................................................................................................
124 Determine the problem source ....................................................................................................... 124 Troubleshooting flowchart .......................................................................................... 124 Power subsystem ............................................................................................................................ 125 Power-on checks .......................................................................................................... 125 Power-on troubleshooting overview .........................................................
125 Scanning subsystem (M680) ........................................................................................................... 129 Control panel checks ....................................................................................................................... 129 Control panel diagnostic flowcharts ............................................................................ 133 Touchscreen black, white, or dim (no image) ............................................ 134 Touchscreen is slow to respond or requires multiple presses to respond .......................................................................................................
135 Touchscreen has an unresponsive zone .................................................... 136 No control panel sound .............................................................................. 137 Home button is unresponsive .................................................................... 138 Hardware integration pocket (HIP) is not functioning (control panel functional) .................................................................................................. 139 Tools for troubleshooting .................................................................................................................................
140 Individual component diagnostics .................................................................................................. 140 LED diagnostics ............................................................................................................. 140 Engine diagnostics ........................................................................................................ 145 Understand lights on the formatter .......................................................... 140 Defeating interlocks ...................................................................................
145 Disable cartridge check .............................................................................. 146 Engine test button ...................................................................................... 147 Paper path test ............................................................................................................. 148 Paper path sensors test ............................................................................................... 148 Manual sensor and tray/bin manual sensor tests ....................................................... 150 Manual sensor test .....................................................................................
150 Tray/bin manual sensor test ...................................................................... 152 Print/stop test .............................................................................................................. 154 Component tests .......................................................................................................... 155 Component test (special-mode test) ......................................................... 155 Scanner tests (M680) .................................................................................................... 158 Scanner tests ..............................................................................................
158 Diagrams ......................................................................................................................................... 160 Block Diagrams ............................................................................................................. 160 viii ENWW