• Main Logic PCB Installation Considerations
• False Motor Errors Due To Poor Grounding
• Paper Jam Sensor Adjustment
• Carriage Tachometer Error on LCD Display

• Premature Fuser Wear and Failure Issues
• Printing of Random Dots
• Developer Unit Problems and Adjustment Procedure
• Main Logic PCB Installation Considerations
• Paper & Label Stock Recommendations
• Laser Failures, Grinding Noises
• EC Firmware Upgrade, Excessive Toner Use
• Error Message "NEED TONER CUP"May Appear In The Display

• Dual Track Tach Motor Compatibility
• Unix Printing Issues
• Knowing the difference between the 850XL and the OTC850
• 4130/4140/1050/1450 transformer compatibility
• Ribbon Advancement Problem
• 850XL Sporadic Form Feeding and repetitive character printing

Drivers

• OTC Text Driver use and Microsoft Open Case Number "SRX990112602002"