NP 6035 Exposure Adjustment?

[User Name]

I'm not familiar with Canons so I was hoping someone would be kind enough to take me through the steps of how to darken the exposure on an NP 6035.

As of now it copies so light that it doesn't see anything written in pen. I copied the service history of the machine and It came out as a blank service history sheet.

Thanks.

[User Name]

Have you cleaned the optics? when these mirrors get dusty/dirty the copies start to come out light.

Yeah, I cleaned the optics.

[User Name]

If you are sure all 6 mirrors & dust glass are clean (number 6 & dust glass is above the drum)

I'm wrong. I only cleaned four of the six. Are the ones above the drum easy to clean? And thanks for info on the dev bias.

[blackcat4866]

If you are sure all 6 mirrors & dust glass are clean (number 6 & dust glass is above the drum)

Then you can ajust the dev bias in service mode. Open the front door with the m/c on, under the counter is a small hole, using a small pointer ( a bent paper clip for instance) poke it in the hole to press the service mode button.

Look on the screen you should now see a "$" in the top corner of the screen, now press the * key twice (additional functions key) this will take you to service mode, now press the AJUST tab on the screen, scroll through the munu untill you see BIAS you can then ajust this. There should be a label inside the front door that shows the correct value. Also while you are there check teh PRINMARY & IPOFSET are the same as on the front of the drum.

Hope this helps.

Canon.Tech is right on the mark. Most of the time exposures do not need to be adjusted if the mirrors are clean. All the mirrors. To access mirrors 5 & 6 you must remove the drum , developing unit, and front cover. The wiring is routed through the front frame and must be freed up. There are two screws through the front frame to release the blanking assembly.

I'm not familiar with Canons ... if you're not so familiar with Canons I doubt you've cleaned all the optics. =^..^=

[User Name]

Canon.Tech is right on the mark. Most of the time exposures do not need to be adjusted if the mirrors are clean. All the mirrors. To access mirrors 5 & 6 you must remove the drum , developing unit, and front cover. The wiring is routed through the front frame and must be freed up. There are two screws through the front frame to release the blanking assembly.

I'm not familiar with Canons ... if you're not so familiar with Canons I doubt you've cleaned all the optics. =^..^=

Thanks for the info and I admitted I didn't clean all of the mirrors. I suppose I should have known they were there but you'd be surprised at how much I don't know/can't remember.

Something about the way you worded your response makes me feel like I've just failed a test.

[blackcat4866]

It's just that I've hear lots of techs tell me: "Sure, I cleaned all the optics .... ".
These same guys should have known better, having manuals, Canon training, and lots of support.

You didn't have these advantages. As a matter of fact most more recent techs do not even have to think about the additional optics used by analog copiers. The laser does the job, and is more or less sealed up.

You'll be surprised how dirty those other mirrors are. I tried to clean them once a year.

Your answer wasn't up yet, when I was posting. It's just that I've heard this answer before. =^..^=

[fred breault]

you can ajust exposer in service mode. open and cheat the front door. use a paper clip and press service switch sw3. This is inside just below were the counters are at it is just a little hole. press it once then you will see on the display a $ symbol, then press the * button on the controll pannel twice. Now you should be in service mode. you should see display,i/o,adjust,function, and so on. you want *3* adjust. Scroll down to the 7th screen to light-5 and change the setting you can lighten or darken your copy. First you should clean all the optics coronas before making any adjustment.

[User Name]

As a matter of fact most more recent techs...

That's me. A more "recent" tech.

Still appreciate your help as always blackcat4866.

There is a cleaning tool inder the glass (if it's not gone missing after all these years!) towards the front of the machine, use that to clean the lower mirror under the lens cover & use it to clean the mirror above the drum.

Under the glass? Interesting. That will come in handy if it's still there. Thanks again!

[User Name]

you can ajust exposer in service mode. open and cheat the front door. use a paper clip and press service switch sw3. This is inside just below were the counters are at it is just a little hole. press it once then you will see on the display a $ symbol, then press the * button on the controll pannel twice. Now you should be in service mode. you should see display,i/o,adjust,function, and so on. you want *3* adjust. Scroll down to the 7th screen to light-5 and change the setting you can lighten or darken your copy. First you should clean all the optics coronas before making any adjustment.

^^^^^^^^^^^^^^^^^^^^^^

Hello!? did I not say that already!?

You can never have too much help.

[teckat]

CHECK PM

[User Name]

CHECK PM

The drum cartridge has less than 20,000 pages on it and that's all I remember as far as PM items are concerned. If cleaning the optics solves the light copies issue I'm not going to do much else with it. This machine only makes a few thousand copies a year at most.

But if I do need to do anything further with it, I think I'll be able to handle it.

Thanks teckat.

[ikon01]

May make suggestion too.Don't forget the discharge lamps and filter screen above the drum.If they aren't clean you will be compensating for them when you set up exp and bias.

[User Name]

May make suggestion too.Don't forget the discharge lamps and filter screen above the drum.If they aren't clean you will be compensating for them when you set up exp and bias.

Ok, I'll check them as well.

Thanks for the advice.