Diagnostic aids
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of the paper. The toner image is now on the paper and the paper is now stuck to the transfer belt due to the
relative electrical differences.
Service tips
•
If the transfer roller has nicks, pits, or flat spots on it, the surface doesn’t come into contact
with the media and transfer unit properly. This will cause voids or light spots on the page or
repeating voids/light areas, because the toner can’t be fully transferred due to the charge
difference in the areas of damage.
•
If the transfer roller does not engage the transfer unit, or does not have voltage coming from
the high-voltage power supply, the toner will not fully transfer from the transfer unit. As a
result, the entire page will be very light or blank. Any toner that does transfer will be due to a
contact
transfer instead of a
charge
transfer. Check the high-voltage power supply contacts to
the transfer roller.
Step 7: Electric Discharge
A detack saw evenly neutralizes the charge on the paper in order to separate the paper from the belt.
Step 8: Cleaning (Transfer belt/2nd transfer roll)
Some of the unwanted toner will remain on the 2nd transfer roll. To remove these, a positive voltage from the
HVPS is applied to transfer the unwanted toner to the transfer belt.
A cleaning blade comes into contact with the transfer belt and scrapes off the remaining toner on the belt
surface. The scraped toner is then transported to the waste toner cartridge.
Step 9: Fusing
The paper with the toner image has to go through fusing in order to bond the toner particles to the paper surface.
The paper passes to a heat belt, which is heated by the inner heater to melt the toner particles on the paper
surface. At the same time, pressure is also applied to permanently fuse the toner onto the media. The fuser then
moves the printed media to the redrive rolls, which transport the media to the output bin.
The fuser is equipped with a pressure roll retract mechanism that retracts the fuser pressure roll from the fuser
heat belt when printing is not taking place or when the fuser is removed from the machine. This feature reduces
HVPS
Transfer belt
2nd transfer roll
assembly
Summary of Contents for X95 series
Page 26: ...xxvi Service Manual 7558 xxx Go Back Previous Next ...
Page 34: ...xxxiv Service Manual 7558 xxx Go Back Previous Next ...
Page 52: ...1 18 Service Manual 7558 xxx Go Back Previous Next ...
Page 464: ...3 112 Service Manual 7558 xxx Go Back Previous Next TTM theory of operations ...
Page 471: ...Diagnostic aids 3 119 7558 xxx Go Back Previous Next 3TM theory of operations ...
Page 477: ...Diagnostic aids 3 125 7558 xxx Go Back Previous Next 1TM theory of operations ...
Page 494: ...3 142 Service Manual 7558 xxx Go Back Previous Next ...
Page 506: ...4 12 Service Manual 7558 xxx Go Back Previous Next 6 Remove the operator panel top cover ...
Page 512: ...4 18 Service Manual 7558 xxx Go Back Previous Next 5 Remove the rear lower cover ...
Page 619: ...Repair information 4 125 7558 xxx Go Back Previous Next 4 Detach the media feed lift motor ...
Page 704: ...4 210 Service Manual 7558 xxx Go Back Previous Next 8 Remove the LED ...
Page 730: ...4 236 Service Manual 7558 xxx Go Back Previous Next 14 Remove the flatbed scanner assembly ...
Page 1038: ...6 12 Service Manual 7558 xxx Go Back Previous Next ...
Page 1076: ...7 38 Service Manual 7558 xxx Go Back Previous Next Assembly 37 TTM media feed 2 ...
Page 1112: ...7 74 Service Manual 7558 xxx Go Back Previous Next Assembly 71 Finisher punch 8 4 3 10 11 ...
Page 1158: ...7 120 Service Manual 7558 xxx Go Back Previous Next ...
Page 1168: ...I 10 Service Manual 7558 xxx Go Back Previous Next ...