3-154 Phaser 7400 Color Printer Service Manual
CRUM Reader Board Failure
An 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 Table
Applicable 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 Table
Step Actions and Questions Yes No
1
Check all pins of the CRUM Harness for
continuity.
1. Remove the Top Cover (page 8-24).
2. Disconnect the CRUM cable from RFID
on the Engine Control Board and CN1
on the CRUM Reader Board.
Is the cable conductive?
Replace the CRUM
Reader Board
(
page 8-146). If the
error persists, go to
Step 2.
Replace the
CRUM Harness. If
the error persists,
go to Step 2.
2
Check continuity of each Antenna Harness.
Disconnect CN2, CN3, CN4, and CN5 from
the CRUM Reader Board and CRUM
Antennas.
Is each harness conductive?
Replace the CRUM
Antennas
(
page 8-147). If the
error persists, go to
Step 3.
Replace damaged
wiring.
3
Check for +5V at RFID-2 on the Engine
Control Board.
Is there +5 V at RFID-2 <=> ground?
Go to Step 4. Replace the
Engine Control
Board
(
page 8-112).
4
Check for +5V at POWER-2 on the Engine
Control Board.
Is there +5 V at POWER-2 <=> ground?
Replace the Engine
Control Board
(
page 8-112).
Replace the LVPS
(
page 8-121).
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