Sharp FO-3800M Servise Manual page 48

FO-3800M
i. Cross sectional view
28) MHPS
26)
25)
24) POUT
23)
No.
Code Signal name
1
2
3
4
5
6
7
8
9 PE SENSOR PEMP IN
10
11
12
13
14 PIN PIN
SENSOR
29) 30) SL SENSOR
35) 34)
1) 2) 3) 4)
21)
17)
22) 18)
Parts
Name Type
Fusing temperature Thermistor
sensor
No. 3 mirror (LSU)
No. 1 mirror (LSU)
No. 2 cylindrical lens
OPC drum OPC
Laser scanner
frror (No. 2 mirror)
(LSU)
Laser diode
Paper empty Photo
detector transmission
sensor
Paper pressure
spring
Paper pressure plate
Paper feed roller
Paper separator
Paper in detector Photo
transmission
sensor
31) 32)
33) CCD SENSOR
5) 6) 7)
9) PE SENSOR
10)
11)
12)
36)
15) 13)
16)
14) PIN SENSOR
Function/operation
Detects the heat roller surface Analog signal (2.0
∼ 5.0V)
temperature.
Leads the laser beam to the OPC
drum.
Corrects the laser beam deflection
caused by variations in the surface
angle of the scanning mirror. Also
prevents agaist dirt in the optical
section.
Forms latent electrostatic images.
Scans laser beams to perform
imaging.
Corrects the laser beam form and
pitch.
Generates the laser beam.
(Controls ON/OFF for imaging.)
Detects paper on the paper tray. LOW (0V) when
paper is detected.
Presses paper onto the paper feed
roller at a proper pressure.
Presses paper onto the paper feed
roller at a proper pressure.
Feeds paper.
Separates paper in paper feed.
Detects whether the fed paper is LOW (0V) when
transported to the transfer position paper is detected.
or not. By the timing of this
detector signal, the relative
positions of the paper and the print
image are controlled.
5 – 16
8)
Model
Active condition
Note