■ Failure detection
The DC controller determines a fixing unit failure, makes the FIXING HEATER CONTROL signal inactive, releases the relay to
interrupt power supply to the fixing heater and notifies the Main Controller of a failure state when it encounters the following
conditions:
1. Start-up failure (E000)
• If the detected temperature of the thermistor is kept a specified degrees or higher for a specified period of heater start-
up during the wait period.
• If the detected temperature of the thermistor is kept a specified degrees or lower for a specified period under the heater
temperature control during the initial rotation period.
• If the detected temperature of the thermistor is kept a specified degrees or lower for a specified period under the heater
temperature control during the print period.
• If the detected temperature of the thermistor does not reach its targeted temperature within a specified period under the
heater temperature control during the initial rotation period.
2. Abnormal high temperature (E001)
• If the detected temperature of the main thermistor is kept a specified degrees or higher for a specified period.
3. Abnormal low temperature (E003)
• If the detected temperature of the thermistor is kept a specified degrees or lower for a specified period under the heater
temperature control.
4. Drive circuit failure (E004)
• If a specified frequency of the FREQUENCY signal is not detected within a specified period after the printer is turned
on.
• If an out of specified frequency of the FREQUENCY signal is detected after the printer is turned on and the signal is
once detected.
2. Technology
25
Содержание LBP253 SM
Страница 1: ...Revision 1 0 LBP253 SM ...
Страница 11: ...Product Overview 1 Product Lineups 5 Features 6 Product Specifications 7 List of Parts 10 Operation 12 ...
Страница 69: ...Periodical Service 3 Periodically Replaced Parts 63 Consumable Parts 64 Periodical Service 65 Cleaning 66 ...
Страница 109: ...3 Press Release Button and open Front Cover Unit 1 Remove Multi purpose Separation Pad 2 2 1 4 Disassembly Assembly 102 ...
Страница 110: ...Troubleshooting 5 Trouble Shooting 104 Version Upgrade 108 Corrective Actions 114 Debug Log 120 ...
Страница 117: ...4 Click Next button 5 Select USB Device and click Next button 5 Troubleshooting 110 ...
Страница 118: ...6 Click Start button 7 Click Yes button for the warning message to start download Start download 5 Troubleshooting 111 ...
Страница 129: ...Error Jam Alarm 6 Error Codes 123 ...
Страница 135: ...Service Mode 7 Service Mode 129 ...