Remove the imaging (developing) high-voltage power supply ....... 152
First transfer high-voltage power supply ......................................................... 153
Remove the first transfer high-voltage power supply .................... 153
Second transfer high-voltage power supply .................................................... 155
Remove the second transfer high-voltage power supply ................ 155
Driver PCA ...................................................................................................... 157
Remove the driver PCA .................................................................. 157
Power switch PCA ........................................................................................... 159
Remove the power switch PCA ...................................................... 159
Environmental sensor ..................................................................................... 160
Remove the environmental sensor ................................................. 160
Optional paper feeder assembly (Tray 3) ........................................................................ 161
Tray 3 rear cover ............................................................................................. 161
Tray 3 left cover .............................................................................................. 161
Tray 3 right-front cover .................................................................................... 163
Tray 3 front-upper cover .................................................................................. 164
Tray 3 right door .............................................................................................. 164
Tray 3 right-lower cover .................................................................................. 166
Tray 3 pickup assembly .................................................................................. 167
Tray 3 lifter drive assembly ............................................................................. 168
Tray 3 pickup motor ........................................................................................ 169
Tray 3 driver PCA ............................................................................................ 170
3 Solve problems
Solve problems checklist .................................................................................................................. 172
Menu map ........................................................................................................................................ 173
Troubleshooting process .................................................................................................................. 174
Pretroubleshooting checklist ........................................................................................... 174
Power-on checks ............................................................................................................. 176
Tools for troubleshooting .................................................................................................................. 177
Diagrams ......................................................................................................................... 177
Block diagrams ................................................................................................ 177
Plug/jack locations .......................................................................................... 179
Location of connectors .................................................................................... 180
DC controller connections .............................................................. 180
Product connections ....................................................................... 182
Locations of major components ...................................................................... 189
General timing charts ...................................................................................... 196
General circuit diagram ................................................................................... 197
HP ToolboxFX ................................................................................................................. 200
Open HP ToolboxFX ....................................................................................... 200
Status .............................................................................................................. 201
Event log ......................................................................................... 201
ENWW vii