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Service (repair) Manual RISO GR3750 - Office Equipment & Supplies

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Posted on Jan 02, 2017

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SOURCE: Riso GR3750 T1 error Drum Jam

The hook is located just above the power supply once the back cover is off. Also there is a drum release centered under the drum that a screwdriver can disengage.

Posted on Apr 22, 2008

  • 55 Answers

SOURCE: riso graph GR3750 marca falla

"Risograph GR3750 marks to fault T11. I need consultation to solve this problem. Or it is necessary to call to technical support?"
Error T11 means: Call service.
Here some details of the error which may help to solve it: Pressure Control Motor Lock • In 100ms from turning ON of the pressure control motor, the encoder sensor cannot detect a pulse. • In 5 seconds from turning ON of the pressure control motor, the pressure centering sensor is not turned ON/OFF. • When the fuse of the main power board is gone.

Posted on Apr 29, 2011

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Riso GR3750


this copier can not print envelops

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Riso graph GR3750 marca falla t11 necesito asesoria para solucionar este problema. O es necesario llamar a soporte tecnico ??


"Risograph GR3750 marks to fault T11. I need consultation to solve this problem. Or it is necessary to call to technical support?"
Error T11 means: Call service.
Here some details of the error which may help to solve it: Pressure Control Motor Lock • In 100ms from turning ON of the pressure control motor, the encoder sensor cannot detect a pulse. • In 5 seconds from turning ON of the pressure control motor, the pressure centering sensor is not turned ON/OFF. • When the fuse of the main power board is gone.

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What is a T11 error code mean on a Risograph GR3750?


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T2 indicates an elevator motor failure. Take off the back cover and check the lower limit sensor for the paper tray to make sure its not full of dust.
Reset can be done by holding the reset key down during power up.
Test mode is entered by holding down LINE/PHOTO and the M/P buttons during power up.
Test mode# 102 tests operation of the elevator motor.

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Check the Power PCB ,maybe some fusies' ve blown

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Riso GR3750 T1 error Drum Jam


I had this problem too: just unlock the hook under the drum; disengage the drum then pull out the drum; then check the home position if not in position open the behind cover, pull the belt until you get the puller to the home position. You will get the same problem if you will not put the main drum puller to the home position. chimuntu@yahoo.com

Aug 06, 2008 | Office Equipment & Supplies

1 Answer

Riso GR3750 T1 error Drum Jam


The hook is located just above the power supply once the back cover is off. Also there is a drum release centered under the drum that a screwdriver can disengage.

Apr 21, 2008 | Office Equipment & Supplies

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