Phaser 4500/4510 Service Manual 3-75Error Messages and CodesNo Recognition of StackerTroubleshooting ReferenceApplicable Parts Wiring and Plug/Jack Map References■ HVPS/engine logic board■ Stacker assembly harness 1■ Stacker PWBA■ Stacker assembly harness 2■ “Stacker Signal Diagram” on page 10-37■ “Stacker General Wiring Diagram” onpage 10-36■ “Stacker Plug/Jack Locator” on page 10-16Troubleshooting ProcedureSteps Actions and Questions Yes No1 Check the stacker detection signal (1):1. Disconnect P/J70 on the stackerPWBA.2. Measure the voltage across J70-5<=> J70-6 of stacker assemblyharness 2.Does the voltage measure 3.3 VDC?Go to step 5. Go to step 2.2 Check the stacker detection signal (2):Measure the voltage across P/J30-4<=> P/J30-3 on the HVPS/engine logicboard.Does the voltage measure 3.3 VDC?Go to step 3. Replace theHVPS/enginelogic board(page 8-73).3 Check stacker assembly harness 2:Remove stacker assembly harness 2.Check for continuity between J70 <=>J3070.Is the harness continuous?Go to step 4. Replace stackerassemblyharness 2.4 Check stacker assembly harness 1:1. Remove stacker assembly harness1.2. Check for continuity between J30<=> J3070.Is the harness continuous?Go to step 5. Replace stackerassemblyharness 1.5 Replace the stacker PWBA.Does the problem still occur?Replace theHVPS/enginelogic board(page 8-73).Problem solved.
