6002i light prints and nearly blank copies

[Scottb]

hello all,

so we got this gem in off the wholesale truck, and it had light internal prints. I figured, that it had been robbed of the good and replaced with old drums dv and such. I ordered a MK and installed ran u952 and no joy.
here is a list of other things that i have tried. Any other ideas would be appreciated...and the fix more so

MK
Cleaned Laser
Kyocera service navigation flow chart
engine pwb
feed image pwb
feed drive pwb(because it was easy and just to rule it out)
transfer high voltage pwb
302ND39170 base terminal HV
the complete conveying section
drum/developer pwb
the connector pwb for the transfer belt assy
replaced laser
Main pwb

[PrintWhisperer]

[darry1322]

Re: 6002i light prints and nearly blank copies

Crash the machine in the middle of printing a skyshot and compare the images on the drum and belt. Might give you a hint as to where you're losing density.

[dalewb74]

Re: 6002i light prints and nearly blank copies

in the cleaning process, you cleaned the optics?

[Scottb]

Re: 6002i light prints and nearly blank copies


eco print is off

[Scottb]

Re: 6002i light prints and nearly blank copies

Crash the machine in the middle of printing a skyshot and compare the images on the drum and belt. Might give you a hint as to where you're losing density.

It looks like there is plenty of image on the belt, so I guess that narrows down to the secondary transfer on the machine side because i did replace the whole conveying with a known working unit....

[Scottb]

Re: 6002i light prints and nearly blank copies

in the cleaning process, you cleaned the optics?

actually no i have not cleaned the mirrors because i noticed the issue was still in the machine when I was in U952 doing the internal print calibrations. I just made a copy after the fact because I knew I would be asked if it did it on copies as well.
I did remove the laser and disassemble it and clean it so that was one of the first things done

[darry1322]

Re: 6002i light prints and nearly blank copies

It looks like there is plenty of image on the belt, so I guess that narrows down to the secondary transfer on the machine side because i did replace the whole conveying with a known working unit....

Looks like you've changed all the parts responsible for second transfer HV, conveying unit). Probably going to be some issue in the circuit connections and contacts. Harness, springs, etc.

[Luther]

Re: 6002i light prints and nearly blank copies

I would check for a bent pin in the side door connection on the machine side, it's easy to bend them and they may have been bent before you changed the conveyance section.

[blackcat4866]

Re: 6002i light prints and nearly blank copies

Crash the machine in the middle of printing a skyshot and compare the images on the drum and belt. Might give you a hint as to where you're losing density.

That was my thought. Emergency stop the machine with a heavy fill image. Then check the latent image density at each drum and on the transfer belt. That will help you determine exactly when you're losing your image fill. =^..^=

[JR2ALTA]

Re: 6002i light prints and nearly blank copies

make sure you have all 3 of these springs on the front and rear of your 2nd transfer. I had one missing, same symptoms, same trouble resolving it.

[PrintWhisperer]

Re: 6002i light prints and nearly blank copies

If shock is applied during transportation or depending on the assembly variation, the pressure release gear of the primary transfer unit at the machine front side might come off when setting up or over time. If the print operation is done under the above condition, the abnormal image (missing image, light image, etc. (Refer to [Fig.1])) or service call error C2700 (the primary/secondary transfer pressure release error) might occur. And once the event log is printed, the history of service call below might remain on the list.
- C7601, C7602: ID sensor error - C7620: Auto color registration error
- C7611 to C7614: Bias calibration read value error - C5130 to C5134: Primary transfer high-voltage error


[Content of changes]
To make fixed strengthen of the pressure release gear, change from snap fit fixing to cut washer fixing. (Refer to the following page.)
Field Measure: When the above phenomenon occurs, pull the pressure release joint gear in the outside direction of the unit at the machine rear side of the primary transfer unit (Refer to [Fig.2]). If it is possibl to pull out the pressure release joint gear, the pressure release gear is come off, therefore, replace with the new primary transfer unit (New No.1 to 4). (there is a high possibility that the snap-fit claw is deformed therefore, do not re-use it)

[Old_Tech]

Re: 6002i light prints and nearly blank copies

That was my thought. Emergency stop the machine with a heavy fill image. Then check the latent image density at each drum and on the transfer belt. That will help you determine exactly when you're losing your image fill. =^..^=

make sure you have all 3 of these springs on the front and rear of your 2nd transfer. I had one missing, same symptoms, same trouble resolving it.

[tmaged]

Re: 6002i light prints and nearly blank copies

If I get odd issues like this, I'd try changing and resetting the country code or running U021.

[KYO_OEM]

Re: 6002i light prints and nearly blank copies

Enter U100 and switch off AC AUTOADJ.
Remove MC and check for solid image on DK.
Without U100 change you will get C5101.
If you get no solid image, you must check HV terminal from DV
If you get solid image, check LK or LK controlling
Next step will be check from image on Transfer Belt, terminal for HV
finally:
Take a look for upper right corner above DK contact, there you will find HV springs for secondary transfer roller.