Canon IR7105 light copy

[mramlawi]

Dear all,

im facing a light prints documents i wonder why ,i changed the primary corona's wires and the transfer ,and also the cylander and the DC and same problem,what made the document light? isnt the HV Board or any thing else !

[teckat]

Re: Canon IR7105 light copy

Dear all,

im facing a light prints documents i wonder why ,i changed the primary corona's wires and the transfer ,and also the cylander and the DC and same problem,what made the document light? isnt the HV Board or any thing else !

=================;/
is this on Copies(glass) & Network Prints

CHECK DEVELOPER
If copies and prints are light, -check the coating of Toner on the Developer.

-PRINTS ARE LIGHT and COPIES ARE FINE
Print jobs are light and copies are fine.The problem may be corrected in level 2 Service Mode > Copier > Option > User > PR-D-Se > change from 4 (default) to 6.


CHECK DRUM SURFACE POTENTIALS
The measured and target values (VL1M and VL1T) (VDM and VDT) in DPOT, SERVICE MODE>COPIER>DPOT, should be relatively close in value. When the measured value of VDM (VOLTAGE DRUM/DARK) is close to the value of VL1M (VOLTAGE LIGHT) the SCANNER LASER AND BLANK LAMPS should be investigated because the primary voltage is not being dissipated by light.

-Check visually to make sure that blanking lamps are coming on.
-Check the the laser shutter. When the shutter is not open fully, the VL1 value will rise. Bent actuator may be the cause.

[Simons]

Re: Canon IR7105 light copy

Check the laser unit value checks ini service mode. That can tell you if a laser is bad. Also this series had most laser units defective causing light prints. Do you know about the bad laser units. Certain ones under or over a lot number are prone to this failure. Red tape over a laser unit means it has been repaired .

[manuelubau]

Re: Canon IR7105 light copy

=================;/
is this on Copies(glass) & Network Prints

CHECK DEVELOPER
If copies and prints are light, -check the coating of Toner on the Developer.

-PRINTS ARE LIGHT and COPIES ARE FINE
Print jobs are light and copies are fine.The problem may be corrected in level 2 Service Mode > Copier > Option > User > PR-D-Se > change from 4 (default) to 6.


CHECK DRUM SURFACE POTENTIALS
The measured and target values (VL1M and VL1T) (VDM and VDT) in DPOT, SERVICE MODE>COPIER>DPOT, should be relatively close in value. When the measured value of VDM (VOLTAGE DRUM/DARK) is close to the value of VL1M (VOLTAGE LIGHT) the SCANNER LASER AND BLANK LAMPS should be investigated because the primary voltage is not being dissipated by light.

-Check visually to make sure that blanking lamps are coming on.
-Check the the laser shutter. When the shutter is not open fully, the VL1 value will rise. Bent actuator may be the cause.

what should the values of VL1M and VL1T be?? and VDM and VDT?? I am having the same problem... I checked the values of those and they are not even close to each other... VL1M is like 300...