Code :

Code: 091-917
Description: IOT Y Drum Comm Fail Detect Yellow Drum Comm Fail
Causes: • Yellow Imaging Unit (PL8.1.2) • CRUM Connector Assembly (PL8.1.1) • MCU Board (PL18.1.13)
Remedy: 1 Check the Imaging Unit installation Is the connection part between the CRUM and the CRUM Connector Assembly inside the Yellow Imaging Unit clean (without any foreign objects)? And, is the Yellow Imaging Unit installed properly? Go to step 2. Reinstall the Yellow Imaging Unit. 2 Check the Imaging Unit CRUM Is the connection terminal of the CRUM inside the Yellow Imaging Unit broken? Replace the Yellow Imaging Unit. Go to step 3. 3 Check the CRUM Connector Assembly Is the connection terminal of the CRUM Connector Assembly broken? Replace the CRUM Connector Assembly. Go to step 4. 4 Check the CRUM Connector Assembly connection Check the connection between the CRUM Connector Assembly and the MCU Board. Are P/J121 and P/J12 connected securely? Go to step 5. Connect P/J121 and P/J12 securely. 5 Check the continuity between the CRUM Connector Assembly and the MCU Board Is each cable of P/J121<=>P/J12 continuous? Replace the MCU Board. Replace the CRUM Connector Assembly.

Code: 091-918
Description: IOT M Drum Comm Fail Detect Magenta Drum Comm Fail
Causes: • Magenta Imaging Unit (PL8.1.3) • CRUM Connector Assembly (PL8.1.1) • MCU Board (PL18.1.13)
Remedy: 1 Check the Imaging Unit installation Is the connection part between the CRUM and the CRUM Connector Assembly inside the Magenta Imaging Unit clean (without any foreign objects)? And, is the Magenta Imaging Unit installed properly? Go to step 2. Reinstall the Magenta Imaging Unit. 2 Check the Imaging Unit CRUM Is the connection terminal of the CRUM inside the Magenta Imaging Unit broken? Replace the Magenta Imaging Unit. Go to step 3. 3 Check the CRUM Connector Assembly Is the connection terminal of the CRUM Connector Assembly broken? Replace the CRUM Connector Assembly. Go to step 4. 4 Check the CRUM Connector Assembly connection Check the connection between the CRUM Connector Assembly and the MCU Board. Are P/J122 and P/J12 connected securely? Go to step 5. Connect P/J122 and P/J12 securely. 5 Check the continuity between the CRUM Connector Assembly and the MCU Board Is each cable of P/J122<=>P/J12 continuous? Replace the MCU Board. Replace the CRUM Connector Assembly.

Code: 091-919
Description: IOT C Drum Comm Fail Detect Cyan Drum Comm Fail
Causes: • Cyan Imaging Unit (PL8.1.4) • CRUM Connector Assembly (PL8.1.1) • MCU Board (PL18.1.13)
Remedy: 1 Check the Imaging Unit installation Is the connection part between the CRUM and the CRUM Connector Assembly inside the Cyan Imaging Unit clean (without any foreign objects)? And, is the Cyan Imaging Unit installed properly? Go to step 2. Reinstall the Cyan Imaging Unit. 2 Check the Imaging Unit CRUM Is the connection terminal of the CRUM inside the Cyan Imaging Unit broken? Replace the Cyan Imaging Unit. Go to step 3. 3 Check the CRUM Connector Assembly Is the connection terminal of the CRUM Connector Assembly broken? Replace the CRUM Connector Assembly. Go to step 4. 4 Check the CRUM Connector Assembly connection Check the connection between the CRUM Connector Assembly and the MCU Board. Are P/J123 and P/J12 connected securely? Go to step 5. Connect P/J123 and P/J12 securely. 5 Check the continuity between the CRUM Connector Assembly and the MCU Board Is each cable of P/J123<=>P/J12 continuous? Replace the MCU Board. Replace the CRUM Connector Assembly.

Code: 091-920
Description: DRUM Y CRUM Data Broken Fail Wrong data in CRUM of drum Y
Causes: • Yellow Imaging Unit (PL8.1.2)
Remedy: 1 Check the Imaging Unit installation Is an Imaging Unit other than a Yellow Imaging Unit installed? Or, is the installed Imaging Unit for another printer? Install the right Yellow Imaging Unit. Reinstall the Yellow Imaging Unit.

Code: 091-922
Description: DRUM M CRUM Data Broken Fail Wrong data in CRUM of drum M
Causes: • Magenta Imaging Unit (PL8.1.3)
Remedy: 1 Check the Imaging Unit installation Is an Imaging Unit other than a Magenta Imaging Unit installed? Or, is the installed Imaging Unit for another printer? Install the right Magenta Imaging Unit. Reinstall the Magenta Imaging Unit.

Code: 091-923
Description: DRUM C CRUM Data Broken Fail Wrong data in CRUM of drum C
Causes: • Cyan Imaging Unit (PL8.1.3)
Remedy: 1 Check the Imaging Unit installation Is an Imaging Unit other than a Cyan Imaging Unit installed? Or, is the installed Imaging Unit for another printer? Install the right Cyan Imaging Unit. Reinstall the Cyan Imaging Unit.