Printing apparatus and determination method thereof

A determination method for a printing apparatus provided with a plurality of printing element substrates provided with printing elements that discharge ink using thermal energy, and plurality of temperature sensors, each of the plurality of printing element substrates being provided with one of the temperature sensors that measures the temperature of the corresponding printing element substrate, the method comprising:

• selecting any one of the plurality of temperature sensors;
• and
• performing a determination operation, in a case when only the printing elements of a printing element substrate of the plurality of printing element substrates that corresponds to the selected temperature sensor are driven, to determine a state of the printing element substrate based on the temperature measured by the selected temperature sensor,
• wherein in the performing step, the determination operation for a first printing element substrate is performed, and then the determination operation for a second printing element substrate, which is not adjacent to the first printing element substrate, is performed.

A printing apparatus, comprising:

• a plurality of printing element substrates provided with printing elements that discharge ink using thermal energy;
• an ink channel configured to supply ink in common to the plurality of printing element substrates;
• a plurality of temperature sensors, wherein each of the plurality of printing element substrates is provided with one of the temperature sensors that measures the temperature of the corresponding printing element substrate;
• a selection unit configured to select any one of the plurality of temperature sensors;
• and
• a determination unit configured to perform a determination operation, in a case when only the printing elements of a printing element substrate of the plurality of printing element substrates that corresponds to the selected temperature sensor are driven, to determine a state of the printing element substrate based on the temperature measured by the selected temperature sensor,
• wherein the determination unit performs the determination operation sequentially from a printing element substrate at a downstream side of the ink channel.