To stop auto calibration in toshiba color mfd

check the charge cleaner for that color it might be stuck in the middle of the pin array

under system menu. maintenance run color calibration and auto grad adjustment.

I’m happy to help further over the phone at https://www.6ya.com/expert/mustafa_06f84c65ab5cc745

U might need to check your laser unit...

Never ever do a memory clear all on a color unit. As you discovered it changes all the color registration values. This is a very, very complicated adjustment and very time consuming. I am a color expert and have been for 25 years now. Unless youre a trained tech youll never figure it out. spend 120 bucks and call a technician sorry..

Hi,

Hope it's not the calibration. This could happen due to transfer belt timing problem. There are sensors and reflectors inside the transfer belt assembly. They may be dirty. Clean them or replace the transfer belt if required.

now you can do a full auto gradation under the additional functions button. just follow the instructions as you run it they are self explantory.

though my experience from working on them it is never that simple. there is so much involoved on the inside of this machine that will wear the toner starter out, the developers go bad, cleaning blades and several other factors all effect the color of this particular machine.

so start with the auto gradation and if that doesn't help then i would suggest getting a tech familure with that machine to come and fix it for you.

You May have to recalibrate Here is the procedure
Engaging Maintenance Mode 1. Press and hold the , and keys together. 2. A beep will sound and the “MAINTENANCE MODE” will display momentarily in the information window. 3. Release all keys. “SERIAL NO XXXXX” will display in the information window.
Modifying the Maintenance Mode The following keys are used to modify Maintenance Settings: Upper and Lower Data Information Window SCROLL keys: Display the next and previous settings. Increase and Decrease Level Keys: Adjust the value of the displayed setting up and down respectively, in increments of 1 unit. OK Key: Updates (saves) the value of the display setting in the Flash

Diagnostics - UB Calibration UB (Upper Body) Calibration (Elite Only) The UB Calibration will set the minimum and maximum range of the upper body arms in which they can move within. You can do a Manual Calibration or an Auto Calibration. Auto Calibration is recommended. To calibrate the Upper Body: 1. Enter the Maintenance Mode (see Settings – Maintenance Mode). 2. Press until UB Calibration is displayed in the information window. 3. Press to enter UB Calibration Mode. Manual Calibration 1. For Manual Calibration press 1. 2. Press the until the upper body arms stop moving (None Position), and then press to save. 3. Press the until the upper body actuator stops, and then press the to save. Auto Calibration For Auto Calibration press 2. The display will automatically raise the arms up, then bring them back down to calibrate the positions.

Go to menu on your remote control and select picture setting and try selecting "default" setting to seeif you like the color, if not adjust contrast to about two thirds of the way and brightness to your liking and color to about the middle.

try under user mode (add.function) cleaning or similar and auto calibration, it will print out 4 test that you need to scann on copier, you just follow the copiers instruction

Hi, if you are not able to adjust the convergence using the remote you will need to replace the convergence chips. 
Typical Symptoms

1) Convergence menu does not work for one or more colors.  
Such as: Red moves up,down, but left or right fails. 

2) Screen is bowed looking.

If you have one or more of the problems above you need to replace the convergence chips. You can get a kit and instructions from www.TvRepairKits.com  

Hope this helps :)