Minolta cf3102 printing yellow where white should be

There are several reasons why your Konica Minolta C250i printer may be printing magenta as yellow. Here are some troubleshooting steps you can try:

1. Check the magenta toner cartridge: Make sure that the magenta toner cartridge is properly installed and has enough toner. If the toner cartridge is low or empty, replace it with a new one.
2. Clean the printer heads: Use the printer's cleaning function to clean the printer heads. This can help remove any clogs or buildup that may be preventing the magenta ink from flowing properly.
3. Check the printer settings: Check the printer settings to make sure that the correct paper type and color settings are selected. If the printer is set to print in grayscale or black and white mode, it may not use the magenta ink.
4. Perform a firmware update: Make sure that your printer has the latest firmware installed. Sometimes firmware updates can fix issues with printing quality.
5. Contact Konica Minolta support: If none of the above steps solve the issue, you may need to contact Konica Minolta support for further assistance. They may be able to diagnose the issue remotely or send a technician to your location.

I hope these steps help you resolve the issue.

Replace the Yellow ink

REGISTRATION ISSUE COLORS NOT ON TOP OF COLORS. You need to run the color registration procedure in service mode. requires print out to be looked at,

P codes will allow you to use the machine put degraded. Are your prints coming out with colors not on top of each other?

Try this site for the manual.
Service manuals electronic components datasheets and equipment schematics...

if the procedure does not work you mite have a bad regrestration assy which located under the transfer belt (Where the handles are for the belt

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Does the demo page do the same? Mite have image control board failure. And electrical storms on a good surge protector not a Ace hardware 19.99 special, of course nothing against Ace Hardware :). Could also be a High Voltage board failure. Meter count page OK print out.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Found this on the web. Click on link below to print the entire manual out to keep. Below are steps to do cleaning. If you find this helpful pls rate me. Thanks and Good Luck.

http://www.brother-usa.com/ModelDocuments/Consumer/Users%20Manual/UM_MFC_210C_420CN_EN_286.PDF

How to improve print quality Cleaning the print head
To ensure good print quality, the MFC will regularly clean the print head. You can start the cleaning process manually if needed. Clean the print head and ink cartridges if you get a horizontal line in the text or graphics on your printed pages. You can clean Black only or three colors at a time (Cyan/Yellow/Magenta), or all four colors at once.
Cleaning the print head consumes ink. Cleaning too often uses ink unnecessarily.
Caution
Do NOT touch the print head. Touching the print head may cause permanent damage and may void the print head’s warranty.
1 Press Ink.
2 Press ▲ or ▼ to select Cleaning.
Press Menu/Set.
3 Press ▲ or ▼ to select Black, Color or All.
Press Menu/Set.
The MFC will clean the print head. When cleaning is finished, the MFC will go back to standby mode automatically. If you clean the print head at least five times and the print has not improved, call Brother Customer Service (see Brother numbers on page i).
Checking the print quality
If faded or streaked colors and text appears on your output, some of the nozzles may be clogged. You can check this by printing the Print Quality Check Sheet and looking at the nozzle check pattern.
1 Press Ink.
2 Press ▲ or ▼ to select Test Print.
Press Menu/Set.
3 Press ▲ or ▼ to select Print Quality.
Press Menu/Set.
4 Press Color Start.
The MFC begins printing the Print Quality Check Sheet.
5 Check the sheet to see if the quality is OK by following these steps:
Color block quality check
The LCD shows:
6 Check the quality of the four color blocks on the sheet.
7 If all lines are clear and visible, press 1 (Yes), and go to Step 10.
—OR—
If you can see missing short lines as shown below, press 2 (No).
The LCD will ask you if the print quality is OK for black and three colors.
OK Poor
Is Quality OK?
1.Yes 2.No
Black OK?
1.Yes 2.N
8 Press 2 (No) for Black or three colors
with a problem.
The LCD shows:
Press 1 (Yes). The MFC will start cleaning the print head.
9 After cleaning is finished, press Color Start. The MFC will start
printing the Print Quality Check Sheet again and then return to
step 5.
10 Press Stop/Exit.

Found this on the web. Click on link below to print the entire manual out to keep. Below are steps to do cleaning. If you find this helpful pls rate me. Thanks and Good Luck.

http://www.brother-usa.com/ModelDocuments/Consumer/Users%20Manual/UM_MFC_210C_420CN_EN_286.PDF

How to improve print quality Cleaning the print head
To ensure good print quality, the MFC will regularly clean the print head. You can start the cleaning process manually if needed. Clean the print head and ink cartridges if you get a horizontal line in the text or graphics on your printed pages. You can clean Black only or three colors at a time (Cyan/Yellow/Magenta), or all four colors at once.
Cleaning the print head consumes ink. Cleaning too often uses ink unnecessarily.
Caution
Do NOT touch the print head. Touching the print head may cause permanent damage and may void the print head’s warranty.
1 Press Ink.
2 Press ▲ or ▼ to select Cleaning.
Press Menu/Set.
3 Press ▲ or ▼ to select Black, Color or All.
Press Menu/Set.
The MFC will clean the print head. When cleaning is finished, the MFC will go back to standby mode automatically. If you clean the print head at least five times and the print has not improved, call Brother Customer Service (see Brother numbers on page i).
Checking the print quality
If faded or streaked colors and text appears on your output, some of the nozzles may be clogged. You can check this by printing the Print Quality Check Sheet and looking at the nozzle check pattern.
1 Press Ink.
2 Press ▲ or ▼ to select Test Print.
Press Menu/Set.
3 Press ▲ or ▼ to select Print Quality.
Press Menu/Set.
4 Press Color Start.
The MFC begins printing the Print Quality Check Sheet.
5 Check the sheet to see if the quality is OK by following these steps:
Color block quality check
The LCD shows:
6 Check the quality of the four color blocks on the sheet.
7 If all lines are clear and visible, press 1 (Yes), and go to Step 10.
—OR—
If you can see missing short lines as shown below, press 2 (No).
The LCD will ask you if the print quality is OK for black and three colors.
OK Poor
Is Quality OK?
1.Yes 2.No
Black OK?
1.Yes 2.N
8 Press 2 (No) for Black or three colors
with a problem.
The LCD shows:
Press 1 (Yes). The MFC will start cleaning the print head.
9 After cleaning is finished, press Color Start. The MFC will start
printing the Print Quality Check Sheet again and then return to
step 5.
10 Press Stop/Exit.
There is more, but too long to put here.

Are using OEM cartridges? What about the transfer belt and transfer roller have they been replaced>
.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

in valid cartridge refill

try this site, Self Help Product Support Konica Minolta Business Solutions Inc

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Press menu then start mono then 4 times arrow-up button.
Machine will be in maintenance mode.

press 7 then 6 then 3 : This is a power purge mode. Press start mon to start the purge.
If you are outside CAN/US press 0 then 9 afterwards. machine will print a test sheet. You should see all colors. If you miss colors do the power purge again.
If you are from us/can leave the maintance mode by pressing 9 then 9.
Now press ink etc. to run the test print.

If the colors are still missing after three power purges the printhead is clogged and cant be fixed anymore.