Epson 7000 service manual Motor Driver Front cover Open Cover open Flag, Cover open sensor

EPSON Stylus Pro 7000 Revision B

†Cover open sensor

To ensure proper paper feeding and to prevent paper jams, the front cover must be closed during printing. There is one cover-open sensor that detects when the cover is open using an interlock switch, and this sensor is located near the left side of the main printer opening. When the cover is open, the relay that controls the current to the CR motor and PF motor cuts off the flow of that current. When this happens, the motors lose their electromagnetized state.

Control

CR

Motor

Driver

Front cover

open

Cover open

flag

panel

Cover open sensor

Cover open sensor flag

PF

Motor

Driver

C126/127

Cover

Ink cartridge

holder

Figure 2-16. Cover-Open-Motor Control Circuit

Figure 2-15. Cover Open Sensor

The sudden loss of current to the motors can cause problems and may even damage the motors or the printhead. To prevent this, a discharge from the capacitor connected to the current circuit is used to slow down the current before it is totally cut off. This process ensures that printing stops when the cover is open without causing any damage to printer parts.

Operating Principles Description of Components 68