118Chapter 3 Troubleshooting Other SymptomsPower StackerPrinter does not detectpresence of power stacker1. Check that the power stacker is enabled under the PrinterControl menu. (Refer to the User’s Manual.) If the powerstacker enable/disable option does not appear in themenu, go to the next step.2. Open the rear cabinet door. Check that the ON/OFFindicator lamp is lit. If the ON/OFF indicator is not lit, go tostep 3. If the ON/OFF indicator is lit, press the ON LINEkey and check that the ON LINE indicator lights. If the ONLINE indicator comes on, the stacker is detected by theprinter. If the ON LINE indicator does not come on, go tostep 4.3. a) Power off the printer.b) Unfasten the cable clamp holding the stacker controlpanel cables.c) Disconnect the stacker power cable from the back of thestacker control panel. (See Figure 74, page 368.)d) Locate pin 1 of connector P106. (See the cableassembly drawing in Appendix A.)e) Power on the printer.f) At connector P106 check for +48 volts DC between pins1 and 2 and +5 volts DC between pins 3 and 4. If thevoltages are correct, replace the stacker control panel. Ifthe voltages are not correct, power off the printer, removethe paper path, and disconnect the stacker power cablefrom the controller board. (See Figure 77, page 371.)Check the continuity of the stacker power cable betweenP105 and P106. If the cable fails the continuity test,replace it. If the cable is OK, replace the controller board.4. Power off the printer. Remove the paper path. Disconnectstacker cables from the controller board, stackerassembly, and the stacker control panel (see Figure 74,page 368). Check cables for cuts, breaks, or damagedpins. Check continuity of cables. (See Appendix A.)Replace any cable that is damaged or fails continuity test.Reconnect all stacker cables to the controller board,stacker, and stacker control panel.5. Power on the printer. Check that the ON LINE indicatorlights on the stacker control panel. If the ON LINE indicatordoes not light, replace the stacker control panel.6. Power on the printer. Check that the ON LINE indicatorlights on the stacker control panel. If the ON LINE indicatordoes not light, replace the controller board.Table 4. General Symptom ListSymptom Solution
