General Troubleshooting Information Miscellaneous Problems and Solutions The following lists symptoms and typical solutions to those problems. Abnormal noises are evident, such as grinding or chattering when main motor energized. From the toner cartridge area: 1 Replace the toner cartridge. 2 Replace the Main Gear Assembly. See “Main Gear Assembly” on page 202 for instructions. From Tray 2 or 3: 1 Verify proper paper loading, acceptable media. 2 Inspect the “fingers” on the paper trays to ensure proper paper size detection. 3 Replace the Paper Input Unit. See “Paper Input Unit (PIU)” on page 206 for instructions. 4 Replace the Main Gear Assembly.
See “Main Gear Assembly” on page 202 for instructions. From 2000-sheet Input Tray: 1 Check the white plastic bushing on Tray 4. The bushing is located on the Tray 4 main drive assembly. The bushing accepts the Tray 4 pilot pin when Tray 4 is closed. Replace if broken. 2 Replace 2000-sheet Input Tray Vertical Transfer Assembly. 3 Replace the 2000-sheet Input Tray Main Drive Assembly. C4085-91087 General Troubleshooting Information 381