C451 has light shadow print out while doing double-sided (Mono only)

[brianho80]

Hi guys,

Anyone of you familiar to this problem before?

At the beginning, I try to service (k) drum unit, clean up developer, drum, blade and contact points but problems remain the same..

Second attend, I replaced (k) IU unit, hopefully can solved but no luck. There after, i suspect transfer roller and replace with another used unit (good unit), however problem remains the same.
lastly, I access service mode, change transfer value setting by adding it. Shadow had gone and my print out didnt effect much like blur or having background.

Anyone has better solution or know the why??
Aprreciate for your sharing..

[Albonline]

Re: C451 has light shadow print out while doing double-sided (Mono only)

did you jam the machine and look at the print before it went through the fixing unit?

[Synaux]

Re: C451 has light shadow print out while doing double-sided (Mono only)

Do you have the guide sheet mod installed? a00h 7034 00

[brianho80]

Re: C451 has light shadow print out while doing double-sided (Mono only)

Yes ... I did make it jam n check drum image. Can see image print on drum with very light d shadow.

Initially I though charging, after service also the same

[brianho80]

Re: C451 has light shadow print out while doing double-sided (Mono only)

Do you have the guide sheet mod installed? a00h 7034 00

What is the guide sheet mod?

[RRodgers]

Re: C451 has light shadow print out while doing double-sided (Mono only)

Clean the print head with some rubbing alcohol.

[B0265]

Re: C451 has light shadow print out while doing double-sided (Mono only)

What is the guide sheet mod?

This is the guide sheet mod:
guide sheet.jpg

[brianho80]

Re: C451 has light shadow print out while doing double-sided (Mono only)

This is the guide sheet mod:
[ATTACH=CONFIG]23651[/ATTACH]

This guide sheet mod is improve print quality ??

[Synaux]

Re: C451 has light shadow print out while doing double-sided (Mono only)

This guide sheet mod is improve print quality ??

No...posting that was just for the heck of it...its not like I was trying to be helpful or anything...

Anyway, did you check to see if it is installed? If not, install one (they are cheap...and do enhance CQ).

You can also try boosting the Secondary & Primary Transfer Adjustments and maybe a new transfer roller.