Table 31. Image defects (continued) 230 Chapter 7 Troubleshooting C8523-90921 Problem Condition Solution Vertical lines Foreign substances deposited on the pickup roller. Clean the pickup roller. If the problem persists, replace the pickup roller. Foreign substances deposited on the weight plate. Clean the weight plate. If the problem persists, replace the weight plate. Foreign substances deposited on the feed rollers. Clean the feed rollers. If the problem persists, replace the feed roller assembly. Foreign substances deposited on the registration rollers. Clean the registration roller (upper and lower). If the problem persists, replace the registration roller.
Scars on the white calibration strips on the back of the glass. Clean the white calibration strips on the back of the glass. If the problem persists, replace the glass. Defective flatbed CCD driver. Replace the flatbed optical assembly. Defective scanner controller board. Replace the scanner controller board. Scars on the white calibration strip placed on the delivery roller cover. Clean the white calibration strip on the delivery roller cover. If the problem persists, replace the delivery roller cover. Defective ADF scanner controller board. Replace the ADF scanner controller board. Defective ADF analog processor PCB. Replace the ADF analog processor PCB.
Defective ADF CCD driver. Replace the ADF optical assembly. Horizontal lines Scars on the back of the glass. Clean the white calibration strips on the back of the glass. If the problem persists, replace the glass. Defective flatbed inverter PCB. Replace the flatbed inverter PCB. Defective flatbed CCD driver. Replace the flatbed optical assembly. Defective scanner controller board. Replace the scanner controller board. Scars on the white calibration strip on the delivery roller cover. Clean the white calibration strip on the delivery roller cover. If the problem persists, replace the delivery roller cover. Defective ADF inverter PCB. Replace the ADF inverter PCB.
Defective ADF analog processor PCB. Replace the ADF analog processor PCB. Defective ADF CCD driver. Replace the ADF optical assembly. Defective scanner controller PCB. Replace the scanner controller PCB.