Printer Diagnostics
The printer includes self±diagnostic circuits and software to aid in the discovery, prevention, and correction of system problems and failures. Printer diagnostics fall into these categories:
•Off±line Diagnostics
•On±line Diagnostics
Off±Line Diagnostics
Most of the software diagnostics are executed under the following circumstances:
•The printer performs diagnostic routines when you request a configuration/test print via the control panel. The printout lists the current configuration of the printer. The test print also contains graphical content that demonstrates the quality of the image over the entire image area of the page.
•The printer performs a power±on self test each time the printer is powered on. During this test the printer will not produce a configuration/test print.
The power±on self test consists of the following:
•The printer controller self test: ROM Checksum
Memory Test/Auto Configuration CPU Interrupts and I/O
NOTE: Test failures for the printer controller are reported by a series of long and short beeps. Should your printer fail to power up, listen for the beep and report the pattern to your service provider; e.g. 3 long, 2 short, and 1 long beep.
•Control Panel Switches ± Tests for switches that might be shorted.
•Print Engine FIFO ± Checks for read/write errors.
•Engine Sensor Check ± Scans engine status sensors including paper out, fuser temperature, toner level, cover/door interlocks, paper jam switches, waste toner container, and fuser cam motor.
•System Life Counts ± Checks page count to verify that the OPC drum and the engine life counts have not been exceeded. The printer system counter, part of the OPC assembly, is reset when you replace the OPC.
4±2 | Diagnostics and Troubleshooting |
