TECHNICAL SERVICE BULLETIN
BULLETIN NUMBER: AFICIO COLOR 5106/5206 - 017 12/22/97
APPLICABLE MODEL: AFICIO COLOR 5106/5206
SUBJECT: CYAN TONER SCATTERING IN PRINTER MODE
SYMPTOM:
Cyan toner scattered around the text and the edge of solid images in print mode.
CAUSE:
The PTL light (red light) is blocked by cyan toner. The electrical potential of the image area does not drop
while the potential on the bare drum surface drops. As a result, some toner is attracted to the bare drum
surface. See below figure(VD drops to bare drum potential level but VL does not drop to the same level
because the PTL light is blocked by cyan toner.)
The problem is evident when the amount of toner on the drum (M/A) is large. The problem is seen only in the
print mode since the maximum amount of toner on the drum is higher compared to that of the copy mode.
Compared to the NC5006, the 5106 has a higher M/A for cyan. This causesthe level of cyan toner scattering
to become worse than the NC5006
SOLUTION:
1. The PTL has been changed to emit stronger light.
2. The ACC target for the printer mode has been modified to decrease the maximum amount of toner on the
drum. (IPU ROM revision G)
Before PTL Emission After PTL Emission
REFERENCE
OLD PART NO. NEW PART NO. DESCRIPTION QTY. PAGE ITEM
A0305243 A3995243 PTL Lamp 1
UNITS AFFECTED:
All AFICIO COLOR 5106/5206 copiers manufactured after Serial Number A7137030001 and A7127030001
respectively will have the new PTL Lamp installed during production.
NOTE: This problem can be eliminated by disconnecting the PTL, but in this case, magenta toner blasting
in 2C mode may occur. This is because the intention of the PTL is to cause a little cyan toner
scattering which will repel the scattered magenta toner.
CUSTOMER SERVICE GROUP
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MECHANICAL
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PAPER PATH
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ELECTRICAL
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OTHER
Note: This copy intended as master of original
for reproduction of additional bulletins.
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S M
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COPY QUALITY
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PARTS
toner
toner
VD
VL
bare drum
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