Contents4.2.3 Periodical Servicing ............................................................................................ 4-34.2.3.1 Periodical Servicing (Finisher Unit) ............................................................ 4-34.3 Adjustment................................................................................................................. 4-44.3.1 Basic Adjustment ................................................................................................ 4-44.3.1.1 Upward Curl Mode....................................................................................... 4-44.3.1.2 Special Curl Mode........................................................................................ 4-44.3.1.3 Downward Curl Mode.................................................................................. 4-54.3.1.4 Heavy Paper Upward Curl Mode ................................................................. 4-64.3.1.5 Stack Delivery Mode.................................................................................... 4-74.3.1.6 Offset Stack Mode........................................................................................ 4-84.3.2 Adjustment at Time of Parts Replacement ......................................................... 4-84.3.2.1 Adjusting the Alignment Position ................................................................ 4-84.3.2.2 Adjusting the Staple Position ....................................................................... 4-94.4 Troubleshooting ....................................................................................................... 4-114.4.1 Error Code ......................................................................................................... 4-114.4.1.1 E500;Communication error........................................................................ 4-114.4.1.2 E505;Backup RAM error ........................................................................... 4-114.4.1.3 E514;Rear end assist motor error ............................................................... 4-114.4.1.4 E530;Front aligning plate motor error ....................................................... 4-124.4.1.5 E531;Staple motor error ............................................................................. 4-124.4.1.6 E532;Stapler shift motor error.................................................................... 4-124.4.1.7 E535;Swing motor error............................................................................. 4-134.4.1.8 E537;Rear aligning plate motor error......................................................... 4-134.4.1.9 E540;Tray 1 shift motor error .................................................................... 4-144.4.1.10 E542;Tray 2 shift motor error .................................................................. 4-144.4.1.11 E584;Shutter malfunction ........................................................................ 4-154.5 Outline of Electrical Components............................................................................ 4-164.5.1 Sensors (Finisher Unit) ..................................................................................... 4-164.5.2 Microswitches (Finisher Unit) .......................................................................... 4-194.5.3 Solenoids (Finisher Unit) .................................................................................. 4-214.5.4 Motors (Finisher Unit) ...................................................................................... 4-234.5.5 Clutches (Finisher Unit).................................................................................... 4-254.5.6 PCBs (Finisher Unit)......................................................................................... 4-264.6 Variable Resistors (VR), Light-Emitting Diodes (LED), and Check Pins by PCB. 4-284.6.1 Overview........................................................................................................... 4-284.6.2 Finisher Controller PCB.................................................................................... 4-284.7 Upgrading ................................................................................................................ 4-304.7.1 Upgrading (Finisher Unit)................................................................................. 4-304.8 Service Tools ........................................................................................................... 4-404.8.1 Solvents and Oils .............................................................................................. 4-40