Black And White Dots - Ricoh B051 Service Manual

Tech Service Bulletin No. B051/B052 – 014 REISSUE

BLACK AND WHITE DOTS

Approx. 190mm pitch (Fusing belt)
Approx. 125mm pitch (pressure roller)
Replace the fusing belt assembly or
pressure roller.
Replace the PCU
N
Does the image problem
still occur?
Y
Replace the PCU
END
CÓPIA NÃO CONTROLADA
Print out test pattern (SP5-955, No.8) for each
color.
Do black/white
dots appear?
Y
Does the image problem
occur on all colors?
Y
Y
Do the dots appear at a
fixed interval (pitch)?
N
Check the surface of the OPC and
image transfer belts.
N
Are there any particles
stuck to the roller, or is
the roller damaged?
Y
Clean the belt with a dry cloth.
CÓPIA NÃO CONTROLADA
N
Clean the scanner unit exposure glass
N
Check the surface of the development roller
showing the problem.
Are there any particles
stuck to the roller, or is
the roller damaged?
Y
Clean the development roller with a dry
cloth
Does the image
problem still occur?
Y
Replace the development unit
showing the B/W dots.
N Replace the
development unit
N
END
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