Xerox 7700DX Service Manual - Page 157
Processes of the RegiCon Adjustment, Check Print-quality, Preparation for RegiCon
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Processes of the RegiCon Adjustment RegiCon is an engine resident algorithm that aligns the Magenta, Yellow, and Black lasers to the Cyan laser. Normally, the RegiCon procedure only needs to be performed if the Laser Unit has been replaced. The RegiCon procedures are listed in the Adjustment/Calibration Menu of Service Diagnostics as RegiCon 685 Setup Cycle, and are split into several sections. The should be performed in the order listed, for optimal adjustments. The test procedures should be performed in the following order. Each test must be successful before proceeding to the next. Refer to the RegiCon Flowchart on page 4-133. Check Print-quality RegiCon will fail if there are any print-quality problems or if the MOB Sensor is not functioning correctly. 1. Select the Print Halftone pages from diagnostics and examine the page for any print-quality problems. Diagnose and repair any print-quality problems before running any RegiCon procedure. 2. Exame the shutter on the MOB Sensor and verify that it is not dislodged and moves freely without contacting any other parts. 3. If RegiCon appears to run correctly, but "No Results" is displayed, one of the Sensors on the MOB Sensor Assembly or the Laser could have failed, or the usrstart_del snippet needs to be downloaded to the hard drive. Note The preferred method to correct any color registration issues is to follow the Reset Engine NVRAM procedure (page 6-150). This will write the stored, original, printer specific RegiCon values from the Hard Drive to Engine NVRAM. If this does not restore Proper Printer Color Registration, then proceed with RegiCon Adjustments. Preparation for RegiCon 1. Use the Front Panel connection setup menu to disable Netware. 2. Flip the Dip Switch #2 on the printer's rear panel Down (this disables the Startup Page and enables the printer to write test results to the print engine NVRAM). 3. Disconnect any parallel or network cables from the rear panel of the printer. 4. If a Finisher is installed, disconnect the two cables to the printer and slide the Finisher away from the printer. Note Remember to wait until the printer displays "Ready to Print," plus 10 seconds, after each of the 685-x tests are run before power cycling printer to display results in diagnostics. Failure to wait long enough will result in a "No Results" message. Phaser 7700 Color Laser Printer Service Manual 4-127