MP 3352 Missing text/blank line on scanned document

[rdyjnkns]

Good evening. Back in July of this year, I customer stated that her Ricoh MP3352 had a scanning issue. It started when she used the ADF in SCANNER mode, the documents would have a blank space approximately 1-11/16" from the top of the page. If she scanned the same document in COPY mode, the document was fine. I performed a memory clear of the scanner (SP8501-9) and the results were acceptable until a week ago. I performed the memory clear again, but this time there was no change. I have attached printouts of the documents, the original, SCANNER mode and COPY mode. If I had the theory of operation, it would help. Any assistance would be deeply appreciated. Thank you.Thru ADF in Scanner Mode.pdfThru ADF in Copy Mode.pdfOriginal Document.pdf

[KeviM]

Hello

Firstly I would like to know if the documents being fed and copied LEF or SEF.

I'm going to assume that it is LEF until you say otherwise.

You say that you had this problem earlier and did a memory reset and it came right. I would say the first thing you need to try is firmware update for all your modules.

If that doesn't work the next thing I would look at is changing the lens and SBU board as an entire unit. Swap it with another and test. These have a tendency of getting damaged if there's some sort of electrical power surge or fluctuations in the area.

Next up check you laser unit and glass shield on it. Make sure all is clean. PCU thereafter check your drum, charge and developer. If your PCU has done some mileage swap it with another 1 just to test if it corrects the problem.

That's the basic steps. Try it and let us know how it goes.

[Phil B.]

Good evening. Back in July of this year, I customer stated that her Ricoh MP3352 had a scanning issue. It started when she used the ADF in SCANNER mode, the documents would have a blank space approximately 1-11/16" from the top of the page. If she scanned the same document in COPY mode, the document was fine. I performed a memory clear of the scanner (SP8501-9) and the results were acceptable until a week ago. I performed the memory clear again, but this time there was no change. I have attached printouts of the documents, the original, SCANNER mode and COPY mode. If I had the theory of operation, it would help. Any assistance would be deeply appreciated. Thank you.Thru ADF in Scanner Mode.pdfThru ADF in Copy Mode.pdfOriginal Document.pdf

1) i can't see the attachment
2) you never mention pages passed thru ADF.
3) ADF Rollers cleaned?
4) error/jam codes

PULLING THEETH HERE.

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[slimslob]

If you get a similar result placing the original on the platen glass, then what KeviM says is most likely the problem. You have to remove the entire lens block, including the cross frame that the lens hangs from. The lens is factory aligned to that cross frame. If you loosen the screws holding the lens to the cross frame you could spend days trying to align it again.

If it only affects the document feeder you may have something on the slit glass like a finger print.

[KeviM]

If you get a similar result placing the original on the platen glass, then what KeviM says is most likely the problem. You have to remove the entire lens block, including the cross frame that the lens hangs from. The lens is factory aligned to that cross frame. If you loosen the screws holding the lens to the cross frame you could spend days trying to align it again.

If it only affects the document feeder you may have something on the slit glass like a finger print.

Yes well said Slimslob. Also I forgot to mention never to open the factory set screws which hold the lens in position. Thank you for that.

[KeviM]

1) i can't see the attachment
2) you never mention pages passed thru ADF.
3) ADF Rollers cleaned?
4) error/jam codes

PULLING THEETH HERE.

Sent from my SM-G960U using Tapatalk

Phil B this is what he posted. Hope you can view this Screenshot_20211003_104514.jpgScreenshot_20211003_104500.jpgScreenshot_20211003_104445.jpg

[blackcat4866]

If these faint areas are in the original feed direction (LEF), it could be as simple as a dirty shading plate/roller.

I had a Kyocera not long ago that all second side scans through the DF were nearly blank. The white reference roller for the second side CIS was as close to solid black as I've ever seen one. It must have something to do do with the originals they're scanning. To my surprise it came very close to perfectly clean with ZEP fast505.

The shading plate/shading roller/white plate/white roller serves as a reference to calibrate the CIS to the background color of originals. If the reference is solid black, then the CIS is calibrating to black as the background original color, making the text invisible.

Another thing: Just because your customer noticed it yesterday, does not mean that it occurred suddenly. It very well could have happenened very gradually, like a roller getting dirty, without the enduser noticing. Enduser observations can be very helpful, or completely incorrect ... or anywhere in between. I use them as a starting point only when I make my own observations. =^..^=

[BillyCarpenter]

The shading plate/shading roller/white plate/white roller serves as a reference to calibrate the CIS to the background color of originals. If the reference is solid black, then the CIS is calibrating to black as the background original color, making the text invisible.

=^..^=

Very interesting. I'm having a little trouble wrapping my mind around that. Give me a few minutes to think about it and I'm sure I'll have some questions.

[rdyjnkns]

Hello

Firstly I would like to know if the documents being fed and copied LEF or SEF.

I'm going to assume that it is LEF until you say otherwise.

You say that you had this problem earlier and did a memory reset and it came right. I would say the first thing you need to try is firmware update for all your modules.

If that doesn't work the next thing I would look at is changing the lens and SBU board as an entire unit. Swap it with another and test. These have a tendency of getting damaged if there's some sort of electrical power surge or fluctuations in the area.

Next up check you laser unit and glass shield on it. Make sure all is clean. PCU thereafter check your drum, charge and developer. If your PCU has done some mileage swap it with another 1 just to test if it corrects the problem.

That's the basic steps. Try it and let us know how it goes.

Good morning KeviM,

This is a legal office and the documents are mostly contracts, depositions, etc., so there are lots of pages. That's why they are using the ADF in SCANNER mode. The court requires that all submitted documents be in pdf format. When they are scanning documents on the scanner glass in either the SCANNER or COPY modes, the documents are perfect.

The first thing I did was clean all the scanner mirrors, and both the exposure glass and the scanner exposure glass. The OPC and cleaning blade were replaced 6 months ago, the charging roller will have to be changed due to a faint line produced across the page. I tried to rub it out, but with little success.

As far as updating the firmware, my Ricoh qualifications have expired. So we may have to bring in an outside tech. However could you provide a part number for the lens that you mentioned in your reply it would be deeply appreciated.

[rdyjnkns]

1) i can't see the attachment
2) you never mention pages passed thru ADF.
3) ADF Rollers cleaned?
4) error/jam codes

PULLING THEETH HERE.

Sent from my SM-G960U using Tapatalk

Good morning Phil B.

1. I have resubmitted the attachments.

2. This only happens when the customer uses the ADF in either SCANNER or COPY mode, but so bad in COPY mode.

3. I cleaned the ADF rollers and pads, as well as the scanner mirrors and both the document feeder exposure glass and the exposure glass.

4. There were no jam or other error codes. It add an "Add Toner" issue that was resolved.

Thru ADF in Scanner Mode.pdfThru ADF in Copy Mode.pdfOriginal Document.pdf