Patent ID: 9643413
Date: 2017-05-09
CPC Classifications: B41J

Claim:
1. A printing apparatus comprising: a carriage on which a printhead is mounted; a moving unit configured to reciprocally move said carriage; an encoder configured to detect a position of said carriage; a supply unit configured to supply, to the printhead, one of a first voltage which is used to perform printing by the printhead through a first power line to which a capacitor is parallel-connected, and a second voltage, lower than the first voltage, which is used to detect a current leakage from the printhead through a second power line; and a monitor unit configured to monitor a voltage appearing on the second power line; a control unit configured to execute a detection operation to detect the current leakage based on the voltage monitored by said monitor unit after turning off supply of the first voltage by said supply unit and turning on supply of the second voltage by said supply unit, wherein said control unit executes the detection operation at a timing at which a moving direction of said carriage is reversed by a signal from said encoder.