Troubleshooting process .................................................................................................................. 139
Determine the problem source ........................................................................................ 139
Troubleshooting flowchart ............................................................................... 139
Power subsystem ............................................................................................................ 140
Power-on checks ............................................................................................. 140
Power-on troubleshooting overview ............................................... 140
Control-panel checks ....................................................................................................... 141
Control-panel diagnostic flowcharts ................................................................ 144
Touchscreen black, white, or dim (no image) ................................. 145
Touchscreen is slow to respond or requires multiple presses to
respond ........................................................................................... 146
Touchscreen has an unresponsive zone ........................................ 147
No control-panel sound .................................................................. 148
Home button is unresponsive ......................................................... 149
Hardware integration pocket (HIP) is not functioning (control
panel functional) ............................................................................. 150
Scanning subsystem ........................................................................................................ 150
Tools for troubleshooting .................................................................................................................. 151
Individual component diagnostics .................................................................................... 151
LED diagnostics .............................................................................................. 151
Understand lights on the formatter ................................................. 151
Engine diagnostics .......................................................................................... 156
Defeating interlocks ........................................................................ 156
Disable cartridge check .................................................................. 157
Engine test button ........................................................................... 158
Paper path test ................................................................................................ 158
Paper path sensors test .................................................................................. 159
Manual sensor and tray/bin manual sensor tests ............................................ 160
Manual sensor test ......................................................................... 160
Tray/bin manual sensor test ........................................................... 161
Print/stop test .................................................................................................. 163
Component tests ............................................................................................. 163
Control-panel tests ......................................................................... 163
Component test (special-mode test) ............................................... 164
Finishing accessory component test .............................................. 166
Scanner tests M830 ........................................................................................ 202
Scanner tests .................................................................................. 202
Diagrams ......................................................................................................................... 204
Block diagrams ................................................................................................ 205
Location of connectors .................................................................................... 215
DC controller PCA connectors ........................................................ 215
viii ENWW
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