Abnormal Noise - Dell 1815 Mono Laser Service Manual

Troubleshooting

7.5.3 Abnormal noise

There is noise when copy.
• Description
Check and Cause
1. Check the Scanner Motor and any mechanical
disturbance.
2. Check the Motor Driver in Driver PBA.
7.5.4 Defective Image Quality
The copied image is light or bad.
• Description
Check and Cause
1. Check shading profile.
2. Check the gap between original and scanner
glass.
3. Check printing quality.
Service Manual
7-22
Solution
1. Check the right position of the Scanner Motor , and
check the any mechanical disturbance in the CCD
carriage part.
2. If any driver is defective, replace it.
• Connection PBA U4-1, 19 or U5-1, 19=0V to 24V
swing signal when operating.
Solution
1. Remake shading profile in the tech mode.
2. The gap above 0.5 mm can cause a blurred image.
3. See "Print" troubleshooting.