Tray #1 not detected - Brother MFC-9970CDW

size detection assy stays back side of Tray.
if their tension plate moves out of position , then such issue happens.

It is not seeing tray in the machine. Might be a piece of paper stuck behind the tray stopping it from going in and stopping it from detecting the tray?

E540

Main Cause: The tray home position sensor (PI8) is faulty. The tray lifter motor clock
sensor 1/2 (PI9/PI19) is faulty. The tray upper limit detecting switch (MS5)
is faulty. The tray lifter motor (M5) is faulty. The finisher controller PCB is
faulty.
0001 The ascent does not end in 15 secs when the tray lift motor is
driven; or, the tray home position cannot be detected when the tray
lift motor has been driven for 15 secs.

E584
Main Cause The shutter open sensor (PI5) is faulty. The safety area detecting switch
(MS3) is faulty. The shutter closed detecting switch (MS4) is faulty. The
No. 2 feed motor (M8) is faulty. The finisher controller PCB is faulty.
Mode of
Detection
0001 The shutter closed detecting switch does not turn on when the No.
2 feed motor has been rotated CCW for 1 sec or more.
0002 The shutter open sensor does not turn on when the No. 2 feed motor
has been rotated CCW for 1 sec.
0003 While the tray lift motor is in operation, the shutter closed detecting
switch is found to be off when the tray 1/2 is at OFF position
of the safety area detecting switch.

-David.

HP Laser Jet 4100 HP Not pulling paper from Tray 2
Action: The 4100 will look at tray 1 first then tray 2 If tray 1 is empty it will pull from tray 2 if the papersize matches the job otherwise back to tray 1 and ask for the paper. Your machine likely thinks the paper in tray 2 is not the size you want. For instance you have LETTER in tray2 But the machine thinks it is legal. The LJ 4100 detects the paper size in tray 2 automatically. If you print a configuration page: MENU them INFORMATION then ITEM then CONFIGURATION PAGE then SELECT. The page will print and show what size paper the machine thinks is in Tray 2 if it says LEGAL and you have LETTER you need to Check The Paper Backstop in TRAY 2. The back stop sets the length of the paper if it is not at Letter (8 1/2 x 11) the machine will not detect LETTER. Even if it just a little bit off or between positions.
If it is set at LETTER then you may have bad switches in the machine that are operated by the tray. Or the arms on the tray that operate the switches are not moving properly. You will find the arms on the rt, side of the tray and feel them change position when you move the backstop.

Hope this helps helps. Please keep us updated and remember to rate this answer. TF

E584
Main Cause The shutter open sensor (PI5) is faulty. The safety area detecting switch
(MS3) is faulty. The shutter closed detecting switch (MS4) is faulty. The
No. 2 feed motor (M8) is faulty. The finisher controller PCB is faulty.
Mode of
Detection
0001 The shutter closed detecting switch does not turn on when the No.
2 feed motor has been rotated CCW for 1 sec or more.
0002 The shutter open sensor does not turn on when the No. 2 feed motor
has been rotated CCW for 1 sec.
0003 While the tray lift motor is in operation, the shutter closed detecting
switch is found to be off when the tray 1/2 is at OFF position
of the safety area detecting switch.

Hi, your printer tray 1 is not detected by controler, so you need do:
1) change other tray box instead if you have same one, easy fix it
2) check tray 1 box back side, there is a sensor (optical sensor it does not work), you need find out a white lable stick around there, if the lable is not white enough, the optical sensor does not detecting tray 1.
hope help you fix it and answer your question any time, please rating me thanks

depends on the printer, normal home use printer have only 1 tray.
office printer usually have multiple trys. and usually the default for that is tray 2. tray 1 is manual feed.

The 4100 will look at tray 1 first then tray 2 If tray 1 is empty it will pull from tray 2 if the papersize matches the job otherwise back to tray 1 and ask for the paper.
Your machine likely thinks the paper in tray 2 is not the size you want. For instance you have LETTER in tray2 But the machine thinks it is legal.
The LJ 4100 detects the paper size in tray 2 automatically. If you print a configuration page:
MENU them INFORMATION then ITEM then CONFIGURATION PAGE then SELECT.
The page will print and show what size paper the machine thinks is in Tray 2 if it says LEGAL and you have LETTER you need to Check The Paper Backstop in TRAY 2.
The back stop sets the length of the paper if it is not at Letter (8 1/2 x 11) the machine will not detect LETTER. Even if it just a little bit off or between positions.

If it is set at LETTER then you may have bad switches in the machine that are operated by the tray.
Or the arms on the tray that operate the switches are not moving properly.
You will find the arms on the rt, side of the tray and feel them change position when you move the backstop.
Hope this helps.

look behind the tray and see if there is paper stuck behind the tray. Good luck