3-154 Phaser 7400 Color Printer Service ManualCRUM Reader Board FailureAn error occurred while attempting to read the status of the Toner Cartridge CRUMs.Applicable Status Codes:Code 230: The CRUM Reader Board does not respond.Code 231: A communications error with the CRUM Reader Board.Code 232: A transmit error with the CRUM Reader Board at power on.Code 233: A communications error between the CRUM Antenna and CRUM.Code 234: The CRUM Reader Board detects five or more CRUMs.Initial Actions:■ Cycle the printer's power.■ If the problem persists follow the procedure below.Troubleshooting Reference TableApplicable Parts Wiring and Plug/Jack References■ CRUM Antenna■ CRUM Reader Board■ Print Engine Map 1 (page 10-4)■ Print Engine Fuser (page 10-40)Troubleshooting Procedure TableStep Actions and Questions Yes No1 Check all pins of the CRUM Harness forcontinuity.1. Remove the Top Cover (page 8-24).2. Disconnect the CRUM cable from RFIDon the Engine Control Board and CN1on the CRUM Reader Board.Is the cable conductive?Replace the CRUMReader Board(page 8-146). If theerror persists, go toStep 2.Replace theCRUM Harness. Ifthe error persists,go to Step 2.2 Check continuity of each Antenna Harness.Disconnect CN2, CN3, CN4, and CN5 fromthe CRUM Reader Board and CRUMAntennas.Is each harness conductive?Replace the CRUMAntennas(page 8-147). If theerror persists, go toStep 3.Replace damagedwiring.3 Check for +5V at RFID-2 on the EngineControl Board.Is there +5 V at RFID-2 <=> ground?Go to Step 4. Replace theEngine ControlBoard(page 8-112).4 Check for +5V at POWER-2 on the EngineControl Board.Is there +5 V at POWER-2 <=> ground?Replace the EngineControl Board(page 8-112).Replace the LVPS(page 8-121).
