| 摘要 |
Printing apparatus 20 comprises a contact detection terminal 101 , a cartridge detection circuit M 10 a, a for-senor terminal 104 and a sensor driving circuit M 20 , wherein the terminal 101 contacts to detection terminal 116 of ink cartridge 70 when the ink cartridge 70 is attached thereto, wherein the circuit M 10 a detects contact or non-contact between the terminal 116 and the terminal 101 , wherein the terminal 104 outputs high voltage, wherein the circuit M 20 controls voltage outputted from terminal 104 . The cartridge detection circuit M 10 a also has a function of shorting detector for detecting contact between the contact detection terminal 101 and the for-senor terminal 104 . In the case that the shorting is detected, the sensor driving circuit M 20 redeces or interrupts the voltage outputted from terminal 104.
|
