Fi-4990c problems- front optical sensor

You need a service call or take it to a service centre

https://www.google.com/search?q=%22frontside+background+changeover+function+overrun%22

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Hi,

If the scan count of your fi-6130 scanner exceeded 2,00,000 scans, then you may have to replace the consumable parts. After replacement of the consumables, you need to rest the consumable counters. To check/reset the Pick/Brake Roller Counter, please follow the steps provided below:

1.Turn on the scanner, and confirm if it is connected correctly to your computer.
2.From the "start" menu, select "All Programs", then select "Scanner Utility for Microsoft Windows", then click on "Software Operation Panel"
3.In the dialog box displayed, from the list on the left of the panel, select "Device Setting"
4.Click the "Clear" button beside the replaced consumable under "Page Counter"
5.Click the "OK" button on the displayed confirmation message. The counter is reset to 0
6.Click the "OK" button to close the "Software Operation Panel" dialog box

Hope the above information is helpful.

Thanks & regards,
ScanCare

Hi,
Explanation:
Front Side Optical Alarm only generated when start command is received or when white level reference is checked (every 50 scans). CCD output must be above predetermined slice level when reading the white reference. Slice level is set in F/W and compared to the read range values. The read range is approximately pixel 120 to 4800. If CCD output does not reach slice level the AGC tries to adjust the output of the amplifier to exceed the slice level. If any portion of the read range is lower than slice then Optical Alarm is generated. Also, it can be generated by dirty optics or reference, bad lamp or CCD.

Resolution:

If "Front Side Optical Alarm" appeared, clean the glass (small and large one) of the flatbed and carrier unit.
If the issue persists, then check if CCD harness or CR cable is disconnected? Connect the connector.
If the issue persists, then replace Front lamp.
If the issue is not resolved, then replace the Control PCA or Carrier unit or Optical unit.

Pls acknowledge if the issue is resolved.

Regards,

Tech Satya

The problem is not just to roll over, be changed and separation pad. These two components change very easily and boxes that are delivered and indications for replacement.
These are the codes for parts:
Pad Assembly - Part Number: PA03289-0111
Pick Roller - Part Number: PA03289-0001
After replacement counters to be reset for each Pieces. Open the scanner properties.

Usually have to display a maintenance message on the computer display, such as: separation pad should be replaced.

If there is to scan any messages like that, you have to clean the sensors around the separation pad. They are round and are getting a little inside. Click on the blue button at the top of the ADF and open the lid.

I hope you was helpful.

Try a flatbed scan scan with the cover open.  If you see the lamp come on, it's likely a cable or CCD problem, though it can be caused by a really dirty reference strip or mirrors. I've never seen one that dirty but it's mentioned in the service manual. I have seen lost documents in the ADF unit cause backside optical alarms, but the front unit is protected from this by glass. If the lamp doesn't light, it can be a defective lamp or cable. In all these cases, you'll need a tech onsite. Disassembly of this model is difficult & reassembly is even worse. I wouldn't recommend it even if you're mechanically inclined.

Attributed to paper sensor problems.

Clean the little square and round paper sensors under swing arm of
upper feed roller asm.

also clean the clear plastic return reflectors.
these may need changing as they taint after time.

When the scanner scans the first image it will bring in via a set of solenoids a background white Reference metal flap for both rear and front cameras.
The above error comes about when the solenoids are sticking or they have magnetised themselves.
1.Clean the Solenoids.
if scanner still errors .
2. Replace solenoids.

The scanner's paper sensor may be jammed. IT is sensint there is paper and hence scanning!. Try and fix it. Sensor may be optical or mechanical. If optical remove shreds of paper or dust. If mechanical ensure it moves forward and backward.

S. Mohan. Chennai

I had the same problem on mine.I found it was due to the vertical height of an aluminum window plate, that is attached in front of the CCD optical sensor box, this box is located inside the back aluminum enclosure.

You have to unscrew the back cover and slide it out sideways, be carefull becasue the back cover is heavy and you don't want that falling on someones toes. Also there is some strong adhesive tape holding the cover to the enclosure so you'll have to pry on it a bit to pull the tape loose.

Once you have the cover off, you will be able to see the optical sensor box that is on the far side where the two guard bars (the flat aluminum bars that hold the back panel in place) the two guard bars meet on the one side Like a V.

Right where the bars meet and the V, you should be able to see the small optical box that has a small **** on the face of it and has two small screws on each side of this **** or "window". This is the Window for the optical sensor to pick up the image it is scanning which is a reflection on a mirror that is located on the opposite side of the enclosure. This mirror is about the size of a standard classroom meter stick and it reflects the scribbles of the panaboard surface as the canvas rolls around durring the scanning phase.

If you uncrew the two small screws that are on each side of the Optical sensor window, you will notice that this Window plate will be able to slide back and forth. Adjut this window plate hight and try printing another page and see how the image looks. If the Black bars are bigger then you have moved the plate the wrong way. Readjust and try again. Once you make the proper adjustments the black bars will no longer appear.

Well, this is what fixed mine, so hopefully this will help you.

Regards,
Gerry O'Brien
email: gerryob AT digital-circuitry DOT com

1.st step remove the software from the computer and then reboot. 2nd step install the software. 3rd step try a scan. Still in trouble? 4th step new scanner These items are not repairable.