Sharp FO-3150 Service Manual page 47

6. Switch, Sensor Layout
No. PARTS NAME
PE sensor
1
(Paper empty sensor)
Front cover open
2
detector
POUT sensor
3
(Paper out sensor)
PIN (Paper in) sensor
4
Temperature fuse
5
187˚C
Temperature fuse
6
132˚C
Thermistor
7
8 Toner sensor
8
2
7
TYPE
Photo transistor
(Transmission type)
Microswitch
Photo transistor
(Transmission type)
Photo transistor
(Transmission type)
(Common with the 2nd
PIN sensor)
Termal fuse
Termal fuse
Thermistor
Photo coupler
6
5
Fig. 6
DESCRIPTION
Detects presence of paper on the
multi-purpose paper tray.
24V line safety switch.
When the front cover is opened, this switch
is turned off to cut the 12V line except for
"ERROR" and "ON LINE" LED. By this,
the main motor, the heater lamp, and the
high voltage power source is turned off.
Detects paper out, and paper jams.
When this switch is turned on, paper
transport and image transfer from the
drum are started.
This is also used for detection of paper jam.
When the heat roller temperature rises
abnormally, this fuse cuts off the power
relay power line(12V line)
When the heat roller temperature rises
abnormally, this fuse cuts off the heater
lamp power line.
This thermistor detects the temperature
on the heat roller.
This photo coupler detects toner quantity.
3 – 3
FO-3150U/C
1
4
3