General Symptom List187Power StackerPrinter does not detect presence ofpower stacker-or-Stacker not working1. Check that the power stacker is enabled under the Printer Control menu. (Refer to theUser’sManual.) If the power stacker enable/disable option does not appear in the menu, go to the nextstep.2. Open the rear cabinet door. Check that the ON/OFF indicator lamp is lit. If the ON/OFF indicator isnot lit, go to step 3. If the ON/OFF indicator is lit, press the ON LINE key and check that the ONLINE indicator lights. If the ON LINE indicator comes on, the stacker is detected by the printer. If theON LINE indicator does not come on, go to step 4.3. a) Power off the printer.b) Unfasten the cable clamp holding the stacker operator panel cables.c) Disconnect the stacker power cable from the back of the stacker operator panel. (See Figure 65,page 468.)d) Locate pin 1 of connector P106. (See the cable assembly drawing in Appendix A.)e) Power on the printer.f) At connector P106 check for +48 volts DC between pins 1 and 2 and +5 volts DC between pins 3and 4. If the voltages are correct, replace the stacker operator panel. If the voltages are not correct,power off and unplug the printer, remove the paper guide assembly, and disconnect the stackerpower cable from the controller board. (See Figure 71, page 474.) Check the continuity of thestacker power cable between P105 and P106. If the cable fails the continuity test, replace it. If thecable is OK, go to the next step.4. Power off and unplug the printer. Remove the paper guide assembly. Disconnect the stacker cablesfrom the controller board, stacker assembly, and the stacker operator panel (see Figure 71, page474). Check cables for cuts, breaks, or damaged pins. Check continuity of cables. Replace anycable that is damaged or fails continuity test. Reconnect all stacker cables to the controller board,stacker, and stacker operator panel.5. Plug in the printer and power it on. Check that the ON LINE indicator lights on the stacker operatorpanel. If the ON LINE indicator does not light, replace the stacker operator panel.6. Power on the printer. Check that the ON LINE indicator lights on the stacker operator panel. If theON LINE indicator does not light, suspect the controller board. Do the following:7. Save the printer configuration values. (Refer to theUser’s Manual.)Table 5. General Symptom ListSymptom Corrective Action
