Brother International MFC 8890DW Service Manual - Page 153

■ Pickup function of paper tray does not work. Step 1 2 3 4 5 Cause Remedy Link lever not operating smoothly or Make sure correct movemet of the link catching. lever. Pickup roller holder ASSY not operating smoothly or catching. Make sure correct movement of the pickup roller holder ASSY. Link lever damaged Replace the link lever. Roller holder ASSY failure Replace the roller holder ASSY. Paper feed/belt cleaner motor failure Replace the paper feed/belt cleaner motor. ■ The new toner is not detected. Step 1 2 3 4 Cause Remedy New toner actuator not operating smoothly or catching. Make sure correct movement of the new toner actuator of the appropriate color. New toner actuator damaged Replace the drum unit. Main PCB failure Replace the main PCB ASSY. Toner sensor PCB (TE/NEW) failure Replace the toner sensor PCB ASSY (TE/ NEW) of the appropriate color. ■ Printing from Macintosh applications fails. - Check that the printer driver which, is supplied with the product, is installed in Library/ Printers, and that the print queue is created. - Check the connecting end on the printer browser. It must be matched with the connecting end which is actually connected. Step 1 2 Possible cause Check Result Remedy Failure inside the machine Does the machine print test pattern? (Check it following the procedure described in "4.5 Test Pattern 1 (Function code 09)" in Chapter 7.) Identify the error type, and then refer to the specified section of this chapter. No Breakage of main PCB Does the machine make a print using a correct PC and a USB cable? Replace the main PCB No ASSY. ■ USB direct printing does not work. Step 1 2 Cause USB host PCB failure Main PCB failure Remedy Replace the USB host PCB. Replace the main PCB ASSY. 3-81 Confidential