- Printers
- Laser printer
toner-depleted
Konica Minolta toner-depleted on laser printer: empty toner
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Medium
Quick answer
The message [Toner is depleted. Replace the Toner Cartridge according to the instructions.] or [Install toner cartridge.] on Konica Minolta bizhub printers means one of the four cartridges is empty or not seated properly. You can force black printing if a color cartridge is empty or replace it.
Safety first
Stop and check this first
- Do not throw toner or any toner container into an open flame because hot toner may scatter and cause burns; keep cartridges out of reach of babies and children and away from precision equipment or data storage devices susceptible to magnetism.
- Do not forcibly open a cartridge; wash stained skin or clothing with soap and water; if toner enters your eyes, rinse immediately with running water for 15 minutes or more and see a doctor; if inhaled or swallowed, gargle or drink water and seek medical advice.
Safe checks you can perform
- Check the exhausted toner color on the panel or tap Continue to force black printing
- Remove the empty cartridge and install a new unused cartridge after shaking it and locking the lever
- Reinstall the cartridge if [Install toner cartridge.] appears and verify it is an unused genuine unit
Leave these tasks to a qualified professional
- Do not attempt this professional task: Inspect the cartridge slot and main unit spring contact when [Install toner cartridge.] persists
- Do not attempt this professional task: Contract consumable replacement or service representative setup for Imaging Unit prompts
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Inspect the cartridge slot and main unit spring contact when [Install toner cartridge.] persists
What they doIf [Install toner cartridge.] remains on screen after reinstalling an unused genuine cartridge with the lever locked, the authorized service representative inspects the slot contacts and detection mechanism.
They must show youthe condition of the main unit spring contact and proper recognition of the installed cartridge on the control panel.
In writingthe cause of the cartridge detection failure and a completed test print.
Contract consumable replacement or service representative setup for Imaging Unit prompts
What they doWhere toner cartridges or Imaging Units are supplied under a maintenance agreement or require service representative settings, the official service team performs the replacement.
They must show youthe genuine consumable installed and clean print quality across all four colors.
In writingthe replaced consumable details and updated maintenance record.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Check the exhausted toner color on the panel or tap Continue to force black printing
- Who:
- Operator viewing the toner replacement prompt on the Control Panel.
- How:
- Check the color of the exhausted toner (black, yellow, magenta, or cyan) in the message window of the Control Panel and tap [Start Guidance] to view the procedure without replacing any color that is not displayed.
- Result that matters:
- The exact depleted color slot is confirmed before opening the Front Door.
- If the cartridge to replace is a color other than black and you need urgent output:
- tap [Continue] and select the desired print job to forcibly continue printing using black.
- If the spare cartridge was moved from a cold place to a warm humid room:
- leave it for approximately one hour to adjust to ambient conditions after storing it horizontally at 35 degrees or less and 85% humidity or less.
- Evidence to keep:
- Depleted toner color displayed in the Control Panel message window.
Evidence: bizhub C3851FS/C3851/C3351 User's Guide - Main Messages and Remedies · bizhub C3851FS/C3851/C3351 User's Guide - When a Message Appears to Replace Consumables or Carry Out Cleaning · bizhub C3851FS/C3851/C3351 User's Guide - Replacing a Toner Cartridge
Remove the empty cartridge and install a new unused cartridge after shaking it and locking the lever
- Who:
- Operator performing the 10-step replacement behind the Front Door.
- How:
- Open the Front Door, pull the lever in front of the depleted cartridge leftward, and pull the cartridge out by its handle; unbag the new cartridge only after Step 4, hold it upside down and shake it several times vertically, horizontally, and longitudinally, push it to the back of the matching color slot, pull the lever to the right to lock it, and close the Front Door.
- Result that matters:
- The front lever locks into its original position, the Front Door closes, and the toner message clears.
- If the lever is difficult to operate or the Front Door will not close:
- push the lever unit to the back and carefully return the front lever to its original locked position.
- If any toner spills during replacement:
- wipe it off immediately with a soft, dry cloth without touching the copper terminal, printed circuit board, or main unit spring contact.
- Evidence to keep:
- Front lever locked to the right, Front Door closed, and used cartridge sealed with tape in its bag and box.
Evidence: bizhub C3851FS/C3851/C3351 User's Guide - Main Messages and Remedies · bizhub C3851FS/C3851/C3351 User's Guide - When a Message Appears to Replace Consumables or Carry Out Cleaning · bizhub C3851FS/C3851/C3351 User's Guide - Replacing a Toner Cartridge
Reinstall the cartridge if [Install toner cartridge.] appears and verify it is an unused genuine unit
- Who:
- Operator if the cartridge prompt remains after closing the Front Door.
- How:
- Open the Front Door, confirm that the installed cartridge is an unused genuine product rather than a previously used unit, and push it firmly to the back with the lever locked to the right.
- Result that matters:
- The machine recognizes the cartridge and displays an accurate toner level.
- If a used or non-genuine recycled cartridge was installed:
- replace it with an unused genuine cartridge so the message window clears.
- If [Install toner cartridge.] persists after reinstalling each consumable and replaceable part:
- contact your service representative for cartridge slot inspection.
- Evidence to keep:
- Cartridge recognition status on the Control Panel after reseating.
Evidence: bizhub C3851FS/C3851/C3351 User's Guide - Main Messages and Remedies · bizhub C3851FS/C3851/C3351 User's Guide - When a Message Appears to Replace Consumables or Carry Out Cleaning · bizhub C3851FS/C3851/C3351 User's Guide - Replacing a Toner Cartridge
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Printers
- Brand
- Konica Minolta
- Product type
- Laser printer
Known code variants
- Debe sustituirse el cartucho de tóner.
- Instale el cartucho de tóner.
- Install toner cartridge.
- Queda poco tóner. Cámbielo cuando así se indique.
- The Toner Cartridge needs to be replaced.
- Tóner agotado. Sustituya el cartucho de tóner según las instrucciones.
- Toner is depleted. Replace the Toner Cartridge according to the instructions.
- Toner is low. Replace when indicated.
What it means
According to the Konica Minolta bizhub C3851FS, C3851, and C3351 User's Guide (2016 edition), the machine uses four toner cartridges (black, yellow, magenta, and cyan) and displays [Toner is low. Replace when indicated.] as an advance warning followed by [Toner is depleted. Replace the Toner Cartridge according to the instructions.] or [The Toner Cartridge needs to be replaced.]; if a cartridge is not seated properly, it shows [Install toner cartridge.]. Other Konica Minolta models may differ, and the message alone never proves the main unit spring contact is faulty.
Warnings and stop conditions
- Highsource verified
Do not throw toner or any toner container into an open flame because hot toner may scatter and cause burns; keep cartridges out of reach of babies and children and away from precision equipment or data storage devices susceptible to magnetism.
Evidence: bizhub C3851FS/C3851/C3351 User's Guide - Main Messages and Remedies · bizhub C3851FS/C3851/C3351 User's Guide - When a Message Appears to Replace Consumables or Carry Out Cleaning · bizhub C3851FS/C3851/C3351 User's Guide - Replacing a Toner Cartridge
- Mediumsource verified
Do not forcibly open a cartridge; wash stained skin or clothing with soap and water; if toner enters your eyes, rinse immediately with running water for 15 minutes or more and see a doctor; if inhaled or swallowed, gargle or drink water and seek medical advice.
Evidence: bizhub C3851FS/C3851/C3351 User's Guide - Main Messages and Remedies · bizhub C3851FS/C3851/C3351 User's Guide - When a Message Appears to Replace Consumables or Carry Out Cleaning · bizhub C3851FS/C3851/C3351 User's Guide - Replacing a Toner Cartridge
Symptoms and causes
Probable causes · in order
- Exhausted toner in the cartridge of the color indicated on the control panelCommon
The toner cartridge for the color shown in the message window has run out of toner and must be replaced with an unused genuine cartridge.
Evidence: bizhub C3851FS/C3851/C3351 User's Guide - Main Messages and Remedies · bizhub C3851FS/C3851/C3351 User's Guide - When a Message Appears to Replace Consumables or Carry Out Cleaning · bizhub C3851FS/C3851/C3351 User's Guide - Replacing a Toner Cartridge
- Improperly seated toner cartridge, unlocked front lever, or installation of a used cartridgePossible
If a cartridge is not pushed all the way back with its front lever locked to the right, [Install toner cartridge.] appears; if replaced with a used cartridge, the message window may not clear.
Evidence: bizhub C3851FS/C3851/C3351 User's Guide - Main Messages and Remedies · bizhub C3851FS/C3851/C3351 User's Guide - When a Message Appears to Replace Consumables or Carry Out Cleaning · bizhub C3851FS/C3851/C3351 User's Guide - Replacing a Toner Cartridge
Virtual technician
Does toner-depleted still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
bizhub C3851FS/C3851/C3351 User's Guide - Main Messages and Remedies
Konica Minolta · 2016 · official_doc
- 2
bizhub C3851FS/C3851/C3351 Manual del operador - Mensajes principales y soluciones
Konica Minolta · 2016 · official_doc
- 3
Konica Minolta · 2016 · official_doc
- 4
- 5
bizhub C3851FS/C3851/C3351 User's Guide - Replacing a Toner Cartridge
Konica Minolta · 2016 · official_doc
- 6
bizhub C3851FS/C3851/C3351 Manual del operador - Reemplazo de un cartucho de tóner
Konica Minolta · 2016 · official_doc
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