• Code: 091-600
• Description: Humidity Sensor Fail RAP Environment Humidity Sensor failure.
• Remedy: Check the following: • The Humidity Sensor for failure: Component Control [092-201] (PL 8.2). • The connection between the Hum and Temp Sensor P/J150 and the MCU PWB P/J415 for open circuit, short circuit, and poor contact If no problems are found, reload the machine software (GP 16).

• Code: 091-912
• Description: Drum Cartridge Life End RAP Drum Not In Position.
• Remedy: Reinstall or replace the Drum (PL 8.1) as necessary.

• Code: 091-913
• Description: Drum Cartridge Life End RAP Drum has reached the end of its life span.
• Remedy: Replace the Drum (PL 8.1).

• Code: 091-914
• Description: Drum CRUM Communication Fail RAP Communication failure with Drum was detected.
• Remedy: 1. Turn the power OFF and ON. 2. Check the following: • The connection between the MCU PWB P/J413 and the Drum CRUM PWB P/J999 for an open circuit and poor contact. • The connection terminals between the Drum CRUM PWB and the Drum CRUM PWB for damage and foreign substances • The Drum CRUM PWB for contamination or disengagement • The Drum for improper installation If no problems are found, replace the following parts in sequence: • Drum (PL 8.1) • MCU PWB (PL 18.2)

• Code: 091-915
• Description: Drum CRUM Data Broken RAP The system detected that the data written to the Drum and the data read from the Drum (K) do not match.
• Remedy: 1. Turn the power OFF and ON. 2. Check the following: • The connection between the MCU PWB P/J413 and the Drum CRUM PWB P/J999 for an open circuit and poor contact. • The connection terminals between the Drum CRUM PWB and the Drum CRUM PWB for damage and foreign substances • The Drum CRUM PWB for contamination or disengagement • The Drum for improper installation If no problems are found, replace the following parts in sequence: • Drum (PL 8.1) • MCU PWB (PL 18.2)

• Code: 091-916
• Description: Drum CRUM Data Mismatch RAP Incorrect authentication area data was detected in Drum.
• Remedy: 1. Turn the power OFF and ON. 2. Check the following: • The connection between the MCU PWB P/J413 and the Drum CRUM PWB P/J999 for an open circuit and poor contact. • The connection terminals between the Drum CRUM PWB and the Drum CRUM PWB for damage and foreign substances • The Drum CRUM PWB for contamination or disengagement • The Drum for improper installation If no problems are found, replace the following parts in sequence: • Drum (PL 8.1) • MCU PWB (PL 18.2)

• Code: 091-921
• Description: Drum CRUM Not In Position RAP The Drum is not in the proper position (loose CRUM).
• Remedy: 1. Remove and reinstall the Drum. 2. Polish the connection terminals between the Drum CRUM PWB and the Drum CRUM PWB with dry cloth. (When cleaning, do not use Drum cleaner, etc.) 3. Check the following: • The connection between the MCU PWB P/J413 and the Drum CRUM PWB P/J999 for an open circuit and poor contact. • The connection terminals between the Drum CRUM PWB and the Drum CRUM PWB for damage and foreign substances • The Drum CRUM PWB for contamination or disengagement • The Drum for improper installation If no problems are found, replace the following parts in sequence: • Drum (PL 8.1) • MCU PWB (PL 18.2)

• Code: 092-315
• Description: ATC Fail RAP The frequency at which the ATC Average Fail or the ATC Amplitude Fail has been occurring has exceeded the threshold value. NOTE: • Although this Fault can be cleared by turning the power OFF and ON and it will be possible to output a few sheets of printouts, when this Fault has occurred a certain number of times, it will no longer be clearable by turning the power OFF and ON. To clear it, clear the value of NVM location [752-022] (ATC Average Fail) or NVM location [752-023] (ATC Amplitude Fail) to "0" (NVM Read/Write). If the machine is not repaired back to normal status, this Fault will occur again during the operation. • When turning the power OFF, turn OFF the power switch first and then the main power switch.
• Remedy: Check the following: • The connection between the MCU PWB P/J413 and the Xero/Developer Cartridge P/ J615 for open circuit, short circuit, and poor contact • The Toner Dispense Motor for revolution failure: Component Control [093-002] (PL 8.2) • The Toner Cartridge for internal toner blockage If no problems are found, replace the following parts in sequence: • Drum Cartridge (PL 8.1) • MCU PWB (PL 18.2)