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Riso GR3770 Paper Jam, Check paper feed

I got an adhesive label stuck up in the center of my paper feed. Long story, short, I have to disassemble the paper feed to get to where the label had come off. I thought I had all the label off and the machine put back together, when I found after it feeds a sheet of paper, the machine stops (without making an impression on the paper), and slowly ejects the sheet; error message; Paper Jam, Check paper feed.

Any suggestions?

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Re: Riso GR3770 Paper Jam, Check paper feed

Sounds like you forgot to plug the High voltage transformer or a sensor back

Posted on Dec 12, 2007

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Canon ix4000 printer. Paper jam caused by sticky label, came off backing, stuck to roller. Normal paper jam cures not effective.

This seems to be fault in the transport of the paper in the rollers. So since you have used adhesive sticker printing, it is possible that some glue has got clogged into the rollers.So use a good clening of the rollers using methyl spirit. also check to see asthere can be some jammed paper in the rollers or the mechanism.
So start this work only if you are mechanically able with the right tools.
Remove the covers to get access to the mechanism . Remove the motor drive assembly , the fitting of the motor to the mechanism. Once this is removed the rollers can be turned manually so that you will be able to feed a paper to see the progress of the movement while studying if there is any obstruction or damage to the paper.
There is a in-detect sensor, usually an opto-coupler , make sure this is not clogged or dirty as this IR detection feeds the signal to the processor for starting the motor drive feed.
Reassemble but make sure the rollers are aligned to be in equal gap to feed the paper without a side pull. Now you must print and see if the fault has changed. If not repeat the above work to confirm the area of obstruction.

Mar 30, 2011 | Canon PIXMA iX4000 InkJet Photo Printer

1 Answer

Riso V800

Riso's are famous for this, i will scrub the rubber timing roll with rubber rejuvenator and clean the steel roll with alcohol.The riso paper feed clutches are weak compared to what they were in this series you may have to replace the clutch. Bud, after doing some research you need to clean the oneway bearings on the pickup and feed rolls, adjust feed table hieght and lastly check/adjust timing in drive and feed roller-you will need a manual for this.

Hope this may help;


Jul 25, 2008 | Riso RZ220 Duplicator

3 Answers

We have a gr 3750 and when the paper tray comes up the feed wheels do not start up to feed the paper in.Any suggestions

  1. check the upward sensor for adjustments and the sensor on the stripper pad unit for adjustments

Mar 13, 2011 | Riso Printers & Copiers

1 Answer

Printer says paper jam, but there is no jam. Everytime it is to print, the alarm light comes on and says to remove paper jam. No jam is there!

Printers use either small 'flags' to detect paper presence or passage or a photo-optical interrupter. The first can be damaged by a previous jam and the latter can fail.
If you have ever used label stock or another adhesive-treated stock, you may have residue from these and without disassembling the printer, you won't be able to determine the exact cause of the erroneous paper-jam error.
Do a search on your brand and model to see if there is a site or tech with specific knowledge of your printer.

Jan 20, 2011 | Canon Pixma MP450 All-In-One InkJet...

2 Answers

The paper twists and causes a jam on every print

sounds like something jamed in the rollers like a pin etc

Jan 05, 2010 | Epson Stylus R265 InkJet Photo Printer

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Riso GR3770 will not pull the paper through once it passes the initial feed assembly. The paper ''picks up'' just fine, but after the lead edge enters the machine, it kicks off impression and gives a...

what happens sometimes is the rear side of the registration (shiny silver color) roller becomes worn down so bad that the spring cannot grab properly. the registration roller, in this case, would have to be replaced.

the way to check is by getting to the back of the machine, and if this is the cause, the spring should be a little wobbly on the shaft. with a new roller, the spring fits snug, and grabs properly for it to feed.

Mar 31, 2009 | Riso Printers & Copiers

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Paper feeding problems Riso TR1510

refix your ink cartrdige also check there is not any paepr jam issue.
also some times printer neeed servicing creates this type of issue.

Mar 28, 2009 | Riso Printers & Copiers

1 Answer

Riso 3700 - Error Code G064

1 Power  swich off/on
2 Open and close front cover twise

Mar 22, 2009 | Printers & Copiers

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Paper feeding problems Riso TR1510

first try paper feed clutch.. make sure nothing is blocking paper path...

Feb 03, 2009 | Riso RZ220 Duplicator

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Paper tray will not lift on a GR3770

either the motor is not turning to lift it up or the gear is broken, do you hear the motor turning when the tray is pushed in? take the tray out and look in the back to see if there is anything blocking it also.

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