Direct answer
For the Canon Color imageCLASS MF656Cdw, the exact consumable/service item and whether it is customer-replaceable are model-specific. First, record the full message and remaining-life page.
What this covers
- Canon Color imageCLASS MF656Cdw (5158C002)
- Canon printer; PIXMA/MegaTank/MAXIFY/imageCLASS ink/toner systems and maintenance paths differ.
- The specific fault this record addresses: shows a maintenance box, drum, fuser, waste toner or service message
What it does not cover
- ×The same symptom on a different Canon product line, which has its own record and its own cited source
- ×An on-screen error code whose meaning has not been checked against this exact model's manual
- ×Live electrical, gas, sealed-system, internal battery-cell or structural repair — a technician boundary, not a self-service step
Differential
What actually causes this, and how to tell them apart
These are ordered by how often each one is the answer, not by how easy it is to try. The point of the middle column is that two causes producing the same headline symptom rarely produce the same detail — that detail is what tells you which one you have before you change anything.
- 1
The drum or fuser has reached its rated life
What separates it A message naming the drum, fuser or transfer unit, with print quality still acceptable.
How to confirm These are rated in pages and are consumables distinct from toner. The message is a counter reaching its limit rather than a fault.
- 2
The counter was not reset after the part was replaced
What separates it The message persists with a new component installed.
How to confirm Some counters reset automatically and some must be reset manually through a documented menu sequence.
- 3
The message is advisory rather than blocking
What separates it The printer continues to work with the message showing.
How to confirm Many maintenance messages are advance warnings. Plan the replacement rather than treating it as an emergency.
- 4
The drum and the toner are being confused for one part
What separates it A drum message on a printer whose toner was recently replaced, or the reverse.
How to confirm On many laser printers these are two separate consumables with very different lifespans — the drum typically lasts several toner cartridges — and on some they are sold as one combined unit. Which applies determines whether the message means a cheap swap or an expensive one.
- 5
The waste toner container is full
What separates it A waste-toner or collection-unit message on a colour laser printer.
How to confirm Colour lasers collect unused toner in a separate container that fills over time and is replaced independently of the cartridges. It is a distinct consumable that owners frequently do not know exists.
- 6
The belt or transfer unit has reached its rated life
What separates it A message naming a transfer belt or transfer unit on a colour laser.
How to confirm A colour laser carries a transfer belt that is rated in pages independently of drums and toner, and it is a genuine replaceable consumable rather than a fault.
Before you touch a setting
Record this first — changing settings destroys the evidence
Every item below stops existing the moment a reset, re-pair or settings change is made. Written down first, they are what separates the causes above; recovered afterwards, they are guesswork.
- The exact message text and any code, which names the component directly.
- Whether the printer still prints, which distinguishes an advisory warning from a blocking condition.
- Whether the named component was replaced recently without the counter being reset.
- The page count, compared with the component's rated life.
Read the exact message and identify the named component
ReversibleMaintenance messages name the part, which makes them far more specific than they first appear.
Replace only the user-serviceable component the message names
ReversibleDrums, fusers and maintenance boxes are consumables distinct from toner and ink.
Reset the counter using the documented sequence after replacement
ReversibleSome counters reset automatically; others must be reset by hand or the message persists.
Establish whether the drum and toner are separate parts on this model
ReversibleOn many laser printers they are separate consumables with very different lifespans; on others they are one combined unit. That determines whether the message means an inexpensive swap or a costly one.
Check the waste toner container on a colour laser
ReversibleColour models collect unused toner in a separate container that fills over time and is replaced independently — a consumable many owners do not know exists.
Compare the page count against the named component's rated life
ReversibleDrums, fusers and transfer belts are all rated in pages, so the count tells you whether the message is a genuine end-of-life or something premature worth investigating.
Model-specific
What is true of this model and not of its siblings
Generic advice for the product line fails here. Each item below is a property of this specific model family that changes which of the steps above apply to you.
- Model scope
- 5158C002. Canon printer; PIXMA/MegaTank/MAXIFY/imageCLASS ink/toner systems and maintenance paths differ.
- Type — COLOR LASER all-in-one (toner)
- A colour laser AIO (print/scan/copy/fax, duplex, wireless). LASER uses toner, not ink, so it does NOT clog from disuse and is fast and low-cost for text/office colour — faded print is usually low/unseated toner, not a clog.
- Toner & drum
- Streaks/spots are usually a toner cartridge or drum issue; repeating marks at a fixed interval point to the imaging drum. Replace toner when prompted; genuine Canon toner is recommended.
- Connectivity
- Wi-Fi/Ethernet/USB; 'offline' is usually a network/queue issue.
- Symptom boundary
- This record covers Canon Color imageCLASS MF656Cdw when it shows a maintenance box, drum, fuser, waste toner or service message. A different symptom on the same hardware, or this symptom on a different Canon product line, has its own record with its own causes and its own cited source.
Stop boundary
When this stops being a self-service repair
Continuing past any one of these costs more than the repair saves — in safety, in warranty, or in evidence a technician needs.
- !Never reset a waste-ink counter without replacing the pad or box — the pad is what stops waste ink escaping into the printer and onto the surface beneath it.
- !Let a laser printer cool before touching any part of the fuser assembly.
Evidence ledger
Sources behind this answer
Visible sources support the visible claims. Home Product Support records the publisher, the fact used and the review date; community reports can suggest an issue but do not become a published fact on their own.
Where the manufacturer's article stops. Canon publishes this as "What to Do When Your Printer's Waste Ink Absorber Is Full". Explains the 5B00 waste-ink-absorber service message, what it means and what the options are. Probed 2026-08-21: title-verified. What that article does not carry is the model boundary — it is written for a product line, and 5158C002 is the scope applied here. Where a control label, terminal, indicator pattern or reset sequence differs on your unit, the manual for that exact model is the authority, not this page and not the article.
Exact questions
Common follow-ups
Does my Canon imageCLASS MF656Cdw clog if I don't print for a while?+
No — it is a colour laser printer, so it uses dry toner rather than liquid ink and does not clog or dry out from sitting unused, unlike an inkjet. That makes it a good choice for occasional but quality colour printing. If print is faded, check for low toner or a cartridge not seated; streaks or repeating marks point to a toner cartridge or the imaging drum. Laser troubleshooting is toner/drum, never nozzle-cleaning.
My printer says it needs service but it prints fine.+
Most maintenance messages are counters reaching a rated page or cycle limit rather than a detected fault, and many are advisory — the printer keeps working while warning you. Read which component it names, because that tells you whether it is a user-replaceable consumable like a maintenance box or drum, or a genuine service item.
I just replaced the toner — why is it asking for a drum?+
On most laser printers the drum and the toner are two separate consumables with very different lifespans, and a drum typically outlasts several toner cartridges before needing replacement itself. On some models they are sold as one combined unit instead. Checking which applies to your model tells you whether this is a routine inexpensive swap or a significantly costlier one.
What is a waste toner container?+
On a colour laser printer, unused toner from the imaging process is collected in a separate container rather than being reused, and it gradually fills. It is replaced independently of the toner cartridges themselves, and it is a consumable a lot of owners do not realise exists until the printer asks for it.
Does this answer apply to every Canon model?+
No. It is scoped to 5158C002. Canon printer; PIXMA/MegaTank/MAXIFY/imageCLASS ink/toner systems and maintenance paths differ.
What should I record before troubleshooting maintenance or drum or fuser?+
Record the complete model identifier, exact message or indicator, software/firmware where visible, the operating stage and what still works.
Why is a factory reset not the first step?+
A reset can erase accounts, networks, maps, schedules or preferences without distinguishing maintenance, drum, fuser. The ordered checks preserve that evidence.
When should I stop and use qualified service?+
Avoid hot fusers, loose toner/ink and service-only internal parts.
Answer for the exact device and software version shown above.