MPC4504. Blue backgroud when scanning

[GeorgeBest]

Hi,

When scanning on this one (MPC4504) it SOMETIMES gives an blue darkground, see picture.
Visited this customer often, the darkground is not always there !!

Tried to change the exposure from automatic tot manual, no results
Adjust with SP4610, no results
customer told that this problem is not always there, sometimes it goes good for weeks, and then, out of the blue there it is !!

its a weird problem, customer told when having this scan they turned the machine off/on, getting a good scan after doing that,
or scan a document first time, getting blue darkground, scanning second time the same original, its gets better, scanning for the fourth time it is good (?!!)

someone a clue here?

Ricoh engineer suggested its condence under the glass after running a lot of prints when scanning, but that is not the case here . .it comes spontaneously

can't figure it out ;(IMG_8090.jpg

[slimslob]

Re: MPC4504. Blue backgroud when scanning

Check the cyan PCDU for toner scattering and correct any found. Then clean the scanner to remove any toner filming that has built up. Finally run Auto Color Calibration for Copier Function.

[Nifty]

Re: MPC4504. Blue backgroud when scanning

Hi,

When scanning on this one (MPC4504) it SOMETIMES gives an blue darkground, see picture.
Visited this customer often, the darkground is not always there !!

Tried to change the exposure from automatic tot manual, no results
Adjust with SP4610, no results
customer told that this problem is not always there, sometimes it goes good for weeks, and then, out of the blue there it is !!

its a weird problem, customer told when having this scan they turned the machine off/on, getting a good scan after doing that,
or scan a document first time, getting blue darkground, scanning second time the same original, its gets better, scanning for the fourth time it is good (?!!)

someone a clue here?

Ricoh engineer suggested its condence under the glass after running a lot of prints when scanning, but that is not the case here . .it comes spontaneously

can't figure it out ;([ATTACH=CONFIG]61700[/ATTACH]

Is the problem just when using Doc feeder, or does it also happen when scanning on the glass???

[luca72]

Re: MPC4504. Blue backgroud when scanning

Hi,

When scanning on this one (MPC4504) it SOMETIMES gives an blue darkground, see picture.
Visited this customer often, the darkground is not always there !!

Tried to change the exposure from automatic tot manual, no results
Adjust with SP4610, no results
customer told that this problem is not always there, sometimes it goes good for weeks, and then, out of the blue there it is !!

its a weird problem, customer told when having this scan they turned the machine off/on, getting a good scan after doing that,
or scan a document first time, getting blue darkground, scanning second time the same original, its gets better, scanning for the fourth time it is good (?!!)

someone a clue here?

Ricoh engineer suggested its condence under the glass after running a lot of prints when scanning, but that is not the case here . .it comes spontaneously

can't figure it out ;([ATTACH=CONFIG]61700[/ATTACH]

what accessory do you use? spdf or rdf?...it seems like something crooked/badly assembled, also try to check that under the carriage, some anti-friction plastic thicknesses have not been lost, the carriage would become lower on one side, moving the image away laterally and creating so shadows, however scanning documents is better in black and white

[GIUBOSS]

Re: MPC4504. Blue backgroud when scanning

carry out a thorough and delicate cleaning of the mirror and glass section, use a mirror cleaning product, taking care not to leave traces of halo.

[copyboy99]

Re: MPC4504. Blue backgroud when scanning

Hi,

When scanning on this one (MPC4504) it SOMETIMES gives an blue darkground, see picture.
Visited this customer often, the darkground is not always there !!

Tried to change the exposure from automatic tot manual, no results
Adjust with SP4610, no results
customer told that this problem is not always there, sometimes it goes good for weeks, and then, out of the blue there it is !!

its a weird problem, customer told when having this scan they turned the machine off/on, getting a good scan after doing that,
or scan a document first time, getting blue darkground, scanning second time the same original, its gets better, scanning for the fourth time it is good (?!!)

someone a clue here?

Ricoh engineer suggested its condence under the glass after running a lot of prints when scanning, but that is not the case here . .it comes spontaneously

can't figure it out ;([ATTACH=CONFIG]61700[/ATTACH]

replace Scanner Carriage Unit (LED Unit)

[Gift]

Re: MPC4504. Blue backgroud when scanning

replace Scanner Carriage Unit (LED Unit)

Had an issue that disappeared after re-seating the flat-cable at the carriage unit.
I think the issue was only visible during DF operation and not from glass plate,
tried all sorts of adjustemts before including swapping the DF.

Scanner swapped the entire scanner from a donator and the issue moved
from the customer to the donator. Like I said after re-seating the cable the
issue was gone.

[Camper8]

[GeorgeBest]

Re: MPC4504. Blue backgroud when scanning

only scanning from the document feeder...

Is the problem just when using Doc feeder, or does it also happen when scanning on the glass???

[Nifty]

Re: MPC4504. Blue backgroud when scanning

only scanning from the document feeder...

There's a black Mylar strip on the adf scan glass. Try peeling it off, and moving it a little further left.

[Gift]

Re: MPC4504. Blue backgroud when scanning

only scanning from the document feeder...

Well then check the cable if the DF is adjustet properly and if the scannerframe is not bent.
Please get back to us with your findings.

[copyboy99]

Re: MPC4504. Blue backgroud when scanning

Well then check the cable if the DF is adjustet properly and if the scannerframe is not bent.
Please get back to us with your findings.

While scanning from SADF/ADF, for the first side of the Copy/Scan it still uses Scanner Carriage Unit. 2nd side (duplex) will use CIS unit on SADF.

recently we are seeing lot of calls similar to this issue, in some cases it resolves by replacing Scanner Carriage unit or IPU board (or BICU if ipu and bcu is combined depending on model)

[mortalbike]

Re: MPC4504. Blue backgroud when scanning

I recently had that same problem with that same machine. The problem occurred exclusively when scanning or copying from the df. I cleaned the optics, replaced the df, changed the scanner glass and it was not solved. The problem was solved when I changed the optical reading unit from another machine.