Brother International MFC 8890DW Service Manual - Page 93
Error code 76 - print unable 78
UPC - 012502622673
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■ Error code 76 Print Unable 76 Turn the power off and then back on again. Rapid temperature rising failure (center thermistor) Error code 78 Print Unable 78 Turn the power off and then back on again. Rapid temperature falling failure (center thermistor) Step Cause Remedy 1 Fuser unit failure Replace the fuser unit. 2 Main PCB failure Replace the main PCB ASSY. ■ Error code 7A Print Unable 7A See Troubleshooting and routine maintenance chapter in User's Guide. No detection of main motor synchronous signal Step 1 2 Cause Motor failure Main PCB failure Remedy Replace the main motor. Replace the main PCB ASSY. ■ Error code 7D Drum Error Open the Front Cover and slide the blue tab across the Drum Unit several times. Dirt on charged wire (detect discharge error) User Check • Clean the corona wire in the drum unit. • Replace the drum unit with a new one. Step 1 2 3 Cause Dirt or dust on drum unit electrodes Charge HVPS PCB failure Main PCB failure Remedy Clean the electrodes of the main body and the drum unit. (Refer to Fig. 3-2) Replace the charge HVPS PCB ASSY. Replace the main PCB ASSY. 3-21 Confidential