August 20072-683WorkCentre 5687 Family 14-703B to 14-706B, 712B, 714BStatus Indicator RAPs14-703B to 14-706B, 712B, 714B Failure To Calibrate RAP(65-87 ppm)Initial ActionsMake sure that the correct RAP is used. To identify the correct RAP to use, go to the 14-703 to14-706, 712, 714, 716, 718 Failure to Calibrate Entry RAP.Check that the exposure lamp illuminates when the machine is performing the set up proce-dure. If necessary, enter the dC330 output code, 14-005. If the lamp does not illuminate, go tothe Exposure Lamp Check at the end of this RAP.ProcedureWARNINGSwitch off the electricity to the machine, GP 14. Disconnect the power cord from thecustomer supply while performing tasks that do not need electricity. Electricity cancause death or injury. Moving parts can cause injury.WARNINGTake care, a hazardous voltage is present at the output of the exposure lamp inverter.Electricity can cause death or injury.Figure 1 shows the component location. Switch off the machine, then switch on the machine,GP 14. The fault is still present.Y NPerform SCP 6 Final Actions.Perform the following:• Remove the DADH, REP 5.19.• Remove the scanner top cover, REP 14.2B.• Reinstall the DADH, REP 5.19.Go to Flag 1 and check the voltages at P/J135 on the power distribution PWB. As necessary,refer to:• 01D +3.3V Distribution RAP.• 01F +12V Distribution RAP.• 01G +24V Distribution RAP.• 01B 0V Distribution RAP.Check the wiring between P/J135 on the power distribution PWB in the image processingmodule and P/J455 and P/J450 on the scanner PWB. Repair as necessary, REP 1.2 or installa new power distribution PWB/scanner PWB harness, PL 14.16 Item 7.Perform dC640 Video Path Diagnostics. The machine passes the diagnostic check.Y NCheck that all scanner harness connectors are correctly seated and that all wiring is in agood condition. Install new parts as necessary.Inspect the calibration strips on the front underside of the CVT glass and document glass. Thecalibration strips are undamaged.Y NInstall a new CVT glass, PL 14.10 Item 4 and/or a new document glass, PL 14.10 Item 5.Clean the white CVT strips, under the front edges of the document glass and the CVT glass,using a cleaning cloth dampened with film remover, PL 26.10 Item 4. Re-assemble the parts.If the fault persists, install new components as necessary:• Scan carriage assembly, PL 14.15 Item 1.• Scan carriage ribbon cable, PL 14.15 Item 4.• Scanner PWB, PL 14.16 Item 8.• Scanner, PL 14.10 Item 1.Exposure Lamp CheckCAUTIONWhen measuring voltages at P/J452 on the scanner PWB, take special care not to short anytwo pins together.Remove the document glass, go to Flag 2 and check the +24V at P/J452 on the scannerPWB. Measure between pins 2 and 4.If +24V cannot be measured, check that there is no short circuit between P/J452, pins 2 and 4.As necessary install new components:• Scanner PWB, PL 14.16 Item 8.• Exposure lamp ribbon harness, PL 14.15 Item 5.• Exposure lamp inverter, PL 14.15 Item 3.Measure the lamp enable signal between P/J452, pin 3 on the scanner PWB and the chassis,and enter the dC330 output code 14-005. Pin 3 is the centre contact on the body of the PJ. Thesignal should change from +24V to 0V. If the signal does not change, install a new scannerPWB, PL 14.16 Item 8.WARNINGDo not install a fuse of a different type or rating. Installing the wrong type or rating offuse can cause overheating and a risk of fire.Check the fuse, PL 14.15 Item 6 in the exposure lamp inverter. If necessary, install new com-ponents:• Fuse, PL 14.15 Item 6.• Exposure lamp, PL 14.15 Item 2.• Exposure lamp inverter, PL 14.15 Item 3.• Scan carriage assembly, PL 14.15 Item 1.AA
