imagepress c1 need tons of help

[Oze]

First thing I'd suggest is to clear the DC/MMI clear and then re-enter the door settings and factory PASCAL settings.
It sounds like either a DC issue or the HVT gone bad.
If you clear the DC and the issue resolves for a short time and then reappears...replace the DC pcb.
The reason to suspect the DC is the fact that the reference values have gone back to 0...and that's why the SGNL levels are reading 0.
Looks like the information that was stored on the DC for the machine to compare against is gone.
The SGNL readings can be anything....as this is just reading the density of the dev at the time...but the reference values MUST be present for this to happen and they just aren't there.

[Penvy]

well that makes sense on the ref and the clear..the HVT I will have to look into.
but with the door open and the door switch bypass
you can see the Prim grid wire glow when in a print cycle

again the solid black on the copier print would show the wire to be ok

How about changing the dev and toner , just clean it out and replace the dev and new toner.
the dev unit is just to new to replace the entire unit/units

Is there just the dev powder and remix the toner like you would when replacing the unit?

[Oze]

well that makes sense on the ref and the clear..the HVT I will have to look into.
but with the door open and the door switch bypass
you can see the Prim grid wire glow when in a print cycle

again the solid black on the copier print would show the wire to be ok

How about changing the dev and toner , just clean it out and replace the dev and new toner.
the dev unit is just to new to replace the entire unit/units

Is there just the dev powder and remix the toner like you would when replacing the unit?

Hmmm...I know that C1 devs can't be restarted...they're meant to be a straight swap.
I'll check at work tomorrow to see if we even have C1 starter.
It might be a case like irc3100 devs where you order each dev as a different part number.
iRC6800 devs come with the one part number and you add the YMC starter.

[Penvy]

Boy I remember that,
all you had to do was vac out all the old toner /dev , clean it ck the blades
and your up!.

Any way the devs are way to new to even do that 75K

there listed replace at 500K.
Funny thing on the service mode 1-display -dens and the readings
DENS-Y 19.80%
DENS-M 21.00%
DENS-C 21.00%
REF-Y 0
REF-M 0
REF-C 0
SGNL-Y 0
SGNY-M 0
SGNY-C 0
PCH-LED 142
PCH-LED 135
PCH-LED 127

Again the patch image sensor error thing
seems as if the image on the drum is just not getting on the drum.
except the K black copy or scan with text or a solid black page on the scan bed.
it looks great.

But the color is just so bad.

The main problem was the color voids or streaks starting with the Y.
I cleaned up the dev unit and it worked fine on just the Y
then the C and M started to do it. They wer getting little clumps that would ride along with the toner and void that area.


The toner is all oem canon as with all service parts kept in cool/dry conditions.

all the gradation and adj would not fix that.

As far as the door settings and the print readout that the install tech did after the install.
I have all of that.
What I did was compare the org readout printout with the last one I just printed out from the same C1 iam having problems with.
But the TEST-DENS on the Y-C-M K show the colors having a real prob with the C-M.

I did cleanout of the Y and toner refresh and it worked fine.

sure replacing the color units would be a start but too soon with the total count.

Funny thing is that when we call other dealers in our area that service canon....they almost all say that they cant srvice the C1!!!!!!!!!!!


Well hey I am going in he Function-install and ck the supply_h_y,c,m,k
and do a INISET-Y-C-M.

I seem to have read somewhere the setup ref sgnl had to start over.
also we have had many power shutoff's here due to storms and just plain
random power loss..wondering if that might have messed with the ram.
does it in pc's all the time, even with batt B/U.

[Oze]

Well hey I am going in he Function-install and ck the supply_h_y,c,m,k
and do a INISET-Y-C-M.

The SPLY you can do but do NOT do INISET.
It's only meant for when you have installed new devs or have restarted devs.
All it does is lock in the current SGNL values as a TRGT....since your issue seems to be affecting both the target values AND the signal values you'll dig yourself a deeper hole.
If you think the devs are under toning then by all means supply toner.
I STILL say the very first thing to do when you get onsite is a DC clear.
Re-enter the values off that original P-print.

seems as if the image on the drum is just not getting on the drum.
except the K black copy or scan with text or a solid black page on the scan bed.
it looks great.

But the color is just so bad.

It sounds like a bias issue affecting the itb.
When you inspect the devs...what does the brush on the black dev look like compared to the brushes of the colored devs?
I refurbed 2 irc6800 black devs yesterday and before I replaced the cylinder they had no brush at all...I replaced the cylinder and bingo...instant brush...didn't even have to touch the blade.

[Penvy]

First I would like to thank you for your help!
I did the dc clear
and yes the "brush" on each unit looks good.

Keep in mind It will copy a b&w just fine even a solid bk

Its the color . now the Y has done a test dens with full coverage.
but the C and M start somewhat but serious void about 3 in into it.
The pattern looks like a beach with small water mark ripples and going to white.
same for both C and M

The prim wire and grid look OK and that would not print B&W if bad as far as I know.
and yes the toner on each color look well blended and brush.
the Y will print the whole page but not the C or M.

The M starts but some hard banding and uneven then into that beach effect and looks as if the toner just wont get off the dev unit.

I just dont feel as if its the patch sensor.
I did a ck on the shutter for it and watched it work as well as the atr flag.


but the display dens will show the default # on the dens and sgnl
but then print and error shutoff and the dens settings on display back to 0

I really think theres something going on with the dev units C am M just not getting the proper toner on drum then 0000020 error.
or the patch sensor for the K and Y is ok but the C and M not.


well I now know enough to tell a good tech like you whats up
Shur would like call you .
ill see if i can pm you my # if its ok.

thanks again

[Oze]

AHHHHHHH...

but the display dens will show the default # on the dens and sgnl
but then print and error shutoff and the dens settings on display back to 0

The density readings at startup will always be zero until a copy/print is made....for example...when I'm checking density readings I always run an Autogradation as soon as the machine has booted.
Can you tell me the exact error code and sub code?...I
can go to dealer support for you if I know the code.

[Penvy]

Its usually 0000020 xx1a or xx86 xx12
always with the ATR or patch .

its showing that the led's 1,2,3 have values of 134.132 etc.
just the fact that the display dens WILL show the default after a boot, auto grad and you can hear the shutter and cylinder spin the the color units.
I think that its the dev units that were clumping and voiding.
thats when we pulled them and cked the blades.

the fast thing would to just clean them out and refresh the dev/toner
like some of the other machs.

Yes I know thats messy and for a tech to pull apart the dev unit and clean
is to much work for the tech in the field but their $$$ to just replace and send them back to do just the same at the factory or even toss!.

The iron oxide refresh dev powder should be easy enough to find

come to think about it after a while the den powder gets wasted too. and will empty out of the dev unit.
If I could find the dev powder I would just clean it out and treat it as a new install for each color.

but that does not fix the whole prob.
The ITB belt looks ok but there are small hickeys on it.
We cleaned the 2 cleaner roll assy on that also with the roll brushes blades etc.
also the drum cleaner assy blades, roll ect.

the fuser roll was damaged by the web wrapping around the roll ends and causing a wrinkel pattern on each side.
this C! is loaded with problems

And we just did not us it that much.
In 1 year under 70K wirh a new drum change in the first Mo. that canon did.
This mach is CLEAN inside and out to have these kinds of problems.
When it works its great but at what cost to the customer and canon.

Even if we change out all the components......dev units, patch sensor, new clean web, new fuser roll with belt, new ITB belt, all the cleaner roll assy's what to say this just wont happen again at 70K
Keep in mind the shop that it's located in it VERY well controlled for TEMP hum, Shop is very clean. and supplys kept IN SHOP.