Image Defects; Image Defect Examples - Brother HL-720 - B/W Laser Printer Service Manual

2.

IMAGE DEFECTS

2.1

Image Defect Examples

I-1 Light
I-5 Dirt back of paper
I-8 Dropout
I-12 Image distortion
I-2 Dark
I-6 Black vertical streaks
I-9 White vertical streaks
o t i n p r s t t e u t o t i n P r o o i n i n t t p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o
o t i n p r s t t e u t o t i n P r o o i n t i n t p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o i n i n t t p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o
o t i n p r s t t e u t o t i n P r o o i n t i n t p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o t i n i n t p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o
o t i n p r s t t e u t o i n t P r o o t i n t i n p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o t i n t i n p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o
o t i n p r s t t e u t o t i n P r o o t i n i n t p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o i n t i n t p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o
o t i n p r s t t e u t o i n t P r o o t t i n i n p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o t i n i n t p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o
o t i n p r s t t e u t o t i n P r o o i n i n t t p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o i n t t i n p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o
o t i n p r s t t e u t o i n t P r o o i n t i n t p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o i n t i n t p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o
o t i n p r s t t e u t o i n t P r o o i n i n t t p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o
o t i n p r s t t e u t o t i n P r o o t i n t i n p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o t i n t i n p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o
o t i n p r s t t e u t o t i n P r o o i n i n t t p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o
o t i n p r s t t e u t o t i n P r o o i n t i n t p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o i n t t i n p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print out test print out test Print out test print o Print out test print o
o t i n p r s t t e u t o t i n P r o o i n i n t t p r p r s t s t t e t e u t u t o o t t i n i n P r P r s t s t t e t e u t u t o o t t i n i n p r p r s t s t t e t e u t u t o o t i n i n t p r p r s t s t t e t e u t u t o o t t i n i n P r P r Print out test print out test print out test Print out test print o Print out test print o Print out test print out test print out test Print out test print o
I-13 Blurred at either side
Fig. 4.1


I-3 Completely blank
I-6 Black and blurred I-7 Black and blurred
vertical stripes
I-10 Faulty
registration
I-4 All black
horizontal stripes
I-11 Poor fixing