Brother International MFC 8890DW Service Manual - Page 103
Error code AD, Error code AE, Error code AF
UPC - 012502622673
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■ Error code AD Scan Unable AD Remove the original document. Turn the power off, then on again. DMA transfer error Step 1 2 Cause Main PCB failure CCD unit failure Remedy Replace the main PCB ASSY. Replace the CCD unit. ■ Error code AE Scan Unable AE See Troubleshooting and routine maintenance chapter in User's Guide. CCD unit home position sensor is not turned on. User Check • Check that the scanner lock lever is unlocked. Step 1 2 3 4 5 6 Cause Drive PCB failure Belt broken Home position sensor failure Tab of CCD unit broken Scanner motor failure Main PCB failure Remedy Replace the drive PCB. Replace the belt. Replace the home position sensor. Replace the CCD unit. Replace the scanner motor. Replace the main PCB ASSY. ■ Error code AF Scanner Locked Open the Document Cover and release Scanner lock lever. Press Stop key. CCD unit home position sensor is not turned off. User Check • Check that the scanner lock lever is unlocked. Step 1 2 3 4 5 Cause Drive PCB failure Belt broken Home position sensor failure Scanner motor failure Main PCB failure Remedy Replace the drive PCB. Replace the belt. Replace the home position sensor. Replace the scanner motor. Replace the main PCB ASSY. 3-31 Confidential