GR3750 is not printing work on the papers - The Office Equipment & Supplies

Brother printer not printing double sided correctly
If the Paper Adjustment Lever for 2-sided(Duplex) Printing is not correctly set for the paper size, paper jams may occur and the print will be out of position on the paper. Open the Properties dialog box in the printer driver. ... The printer will print on both sides of the paper automatically.Sep. 2, 2016

Print on both sides of the paper(2-sided/Duplex Printing ...

https://www.google.com/search?q=Brother+Printer+Duplex+Not+Working

Fixed the Question and turned it into proper English.

Here is the answers. Safety Bar Switch is the most likely, but also open all the doors and look for a small piece of stuck paper.

https://www.google.com/search?safe=off&rlz=1C1QJDB_enCA643CA644&sxsrf=ALeKk00g4pe6XLDImkRO26aEjzkbOu7J5g%3A1615074839665&ei=FxZEYJSDKKLj5NoPz5mg-Ac&q=riso+GR3750+%22check+paper+feed+area%22

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Lift motor

All you really have to do is put in the ink color you want and run a bunch of prints. Going from a light to dark color like black is fast--like about 3000 prints. Black to light color is going to be a lot more prints. Best is to print something with heavy ink. the more ink you put out the fast it will change color.

this copier can not print envelops

"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.

this problem is on pressure motor, stay in rear part machine,i don´t remember of the code for testing. after i put here, if you need pass e- mail for [email protected]

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.

Check the Power PCB ,maybe some fusies' ve blown

reduce scanning density or print desnity