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Independent model diagnostic center

Canon PIXMA TR4720: test what you can before replacing anything.

Run controlled print references first, then use Canon's model support and TR4720 support-code documentation for repeatable printer errors.

Start with evidence

Relevant live checks

Printer Color Test PagePrint CMYK and RGB reference blocks to inspect missing colors and obvious print-quality problems.

Printer Grayscale Test PagePrint a stepped grayscale to inspect tonal separation, color casts, and blocked shadows or highlights.

Printer Alignment Test PagePrint fine lines and alignment references to inspect registration and obvious misalignment.

Printer Small Text Test PagePrint small text at several sizes to inspect sharpness, edge quality, smearing, and readability.

Printer Margin & Clipping TestPrint border references to inspect clipping, scaling, centering, and unexpected page margins.

Model-specific facts

Facts that change how you test it

Canon provides a dedicated PIXMA TR4720 support center with drivers, downloads and manuals.
Canon documents TR4720/TR4722 support codes as numbered error messages shown on the printer/computer.

Connections: Use Canon's model setup documentation for the configured connection

Diagnostic focus

Problems this center is designed to narrow

Print-quality defect
Alignment/scaling problem
TR4720 support code
Setup/driver path requiring Canon support