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OUTLINE OF THE MACHINE
2 - 33
2.3.2 Sensors and switches
Symbol Name Function Remarks P-I
S1-5 APS1-3, APS-C, APS-R
Automatic original
detection sensor
Detecting original sizes Fig. 2-5
Fig. 2-6
38-7
34-14
S6 HOME-SNR
Carriage home position
sensor
Detecting the carriage home position Fig. 2-5
Fig. 2-6
34-101
S7 TEMP/HUMI-SNR
Temperature/humidity
sensor
Detecting the ambient temperature/
humidity of the equipment
Fig. 2-8 3-34
S8 WEB-SNR
Web detection sensor
Detecting the reeled amount of the
cleaning web
Fig. 2-11 25-112
S9 FUS-TR-SNR
Fuser transport sensor
Detecting the transporting status of paper
at the fuser unit
Fig. 2-11 25-112
S10 TNR-EMP-SNR
Toner cartridge empty
sensor
Detecting the remaining amount of new
toner
Fig. 2-12 45-56
S11 USD-TNR-FLL-SNR
Toner bag full detection
sensor
Detecting the full status of used toner in the
toner bag
Fig. 2-13 46-17
S12 ATTNR-SNR
Auto-toner sensor
Detecting the toner density in the developer
unit
Fig. 2-14 44-26
S13 DRUM-SUF-SNR
Drum surface potential
sensor
Detecting the drum surface potential at
charging
(This sensor is composed of the detection
section and the board section)
Fig. 2-14 5-13
S14 TNR-LVL-SNR
Image quality sensor
Detecting the density of toner image (test
pattern) developed on the drum surface
Fig. 2-14 50-16
S15 TRB-SNR2
Transfer belt release
detection sensor
Detecting the releasing status of the
transfer belt
Fig. 2-14 18-2
S16 TRB-SNR1
Transfer belt contact
detection sensor
Detecting the contacting status of the
transfer belt
Fig. 2-14 18-3
S17 MID-TR-SNR
Intermediate transport
sensor
Detecting the paper transport between the
paper feeding system and the registration
roller
Fig. 2-16 17-5
S18 RGST-SNR
Registration sensor
Detecting the paper transport at the
registration roller section
Fig. 2-16 16-6
S19 HRZ-TR-SNR1
Horizontal transport
sensor-1
Detecting the paper transport at the
entrance of the horizontal transport path
Fig. 2-16 20-23
S20 HRZ-TR-SNR2
Horizontal transport
sensor-2
Detecting the paper transport at the middle
of the horizontal transport path
Fig. 2-16 20-23
S21 HRZ-TR-SNR3
Horizontal transport
sensor-3
Detecting the paper transport at the exit of
the horizontal transport path
Fig. 2-16 20-23
S22 EXIT-SNR
Exit sensor
Detecting paper exit Fig. 2-17 15-25
S23 REV-SNR1
Reverse sensor-1
Detecting the paper transport at the upper
section of the reverse transport path
Fig. 2-17 15-14
S24 REV-SNR2
Reverse sensor-2
Detecting the paper transport at the lower
section of the reverse transport path
Fig. 2-17 15-14
S25 SFB-COV-SNR
Bypass feed unit cover
sensor
Detecting the opening/closing status of the
bypass feed unit cover
Fig. 2-19 29-7
S26 FEED-COV-SNR
Feed cover sensor
Detecting the opening/closing status of the
feed cover
Fig. 2-19 29-7
S27 SFB-FEED-SNR
Bypass feed sensor
Detecting the presence of the paper on the
bypass feed unit
Fig. 2-20 10-23