Cover Open Sensor - Epson Stylus Pro 9000 - Print Engine Service Manual

EPSON Stylus Pro 9000

2.2.5 Cover Open Sensor

There are two cover open sensors, or safety interlock switches, one on each
side of the printer, that detect when the cover is open. When the cover is open,
relays that control current to the CR motor and PF motor cut off the flow of
current. As shown in Figure 2-15, a bypass capacitor prevents current spikes
from damaging drivers and other circuitry when the relays shut off.
Front
Cover
Cover Open
Sensor
Figure 2-14. Cover Open Sensor
Technical Overview
CR
Driver
Motor
PF
Motor
Driver
Figure 2-15. Relay Circuit Between Cover Open Sensors and
Printer Motors
Front Cover
open
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