: Feb. 9 2004
1
AR-M550/M620/M700 EXTERNAL VIEW AND INTERNAL STRUCTURE 5 - 9
M1SPD M1SPD Paper remaining quantity
detector (Paper feed tray 3)
Paper remaining quantity
detection (Paper feed tray 3)
Transmission
type
- Remaining
paper quantity
66% or less
PCU PWB Paper feed tray
remaining quantity
sensor
M1SS1 M1SS1 Paper size detector (Paper feed
tray 3)
Paper size detection by
combination of ON/OFF of MISS1
- 4
Tact switch PCU PWB
Multi paper feed
tray vertical size
detection (Refer
to the separate
table in the “[14]
SIGNAL NAME
LIST” (*1).)
M1SS2 M1SS2 Paper size detector (Paper feed
tray 3)
Paper size detection by
combination of ON/OFF of MISS1
- 4
Tact switch PCU PWB
Multi paper feed
tray vertical size
detection (Refer
to the separate
table in the “[14]
SIGNAL NAME
LIST” (*1).)
M1SS3 M1SS3
Paper size detector (Paper
feed tray 3)
Paper size detection by
combination of ON/OFF of MISS1
- 4
Tact switch PCU PWB Multi paper feed
tray vertical size
detection (Refer
to the separate
table in the “[14]
SIGNAL NAME
LIST” (*1).)
M1SS4 M1SS4
Paper size detector (Paper
feed tray 3)
Paper size detection by
combination of ON/OFF of MISS1
- 4
Tact switch PCU PWB Multi paper feed
tray vertical size
detection (Refer
to the separate
table in the “[14]
SIGNAL NAME
LIST” (*1).)
M2SPD M2SPD Paper remaining quantity
detector (Paper feed tray 4)
Paper remaining quantity
detection (Paper feed tray 4)
Transmission
type
- Remaining
paper quantity
66% or less
PCU PWB Paper feed tray
remaining quantity
sensor
M2SS1 M2SS1 Paper size detector (Paper feed
tray 4)
Paper size detection by
combination of ON/OFF of MISS1
- 4
Tact switch PCU PWB
Multi paper feed
tray vertical size
detection (Refer
to the separate
table in the “[14]
SIGNAL NAME
LIST” (*1).)
M2SS2 M2SS2
Paper size detector (Paper
feed tray 4)
Paper size detection by
combination of ON/OFF of MISS1
- 4
Tact switch PCU PWB Multi paper feed
tray vertical size
detection (Refer
to the separate
table in the “[14]
SIGNAL NAME
LIST” (*1).)
M2SS3 M2SS3 Paper size detector (Paper feed
tray 4)
Paper size detection by
combination of ON/OFF of MISS1
- 4
Tact switch PCU PWB
Multi paper feed
tray vertical size
detection (Refer
to the separate
table in the “[14]
SIGNAL NAME
LIST” (*1).)
M2SS4 M2SS4 Paper size detector (Paper feed
tray 4)
Paper size detection by
combination of ON/OFF of MISS1
- 4
Tact switch PCU PWB
Multi paper feed
tray vertical size
detection (Refer
to the separate
table in the “[14]
SIGNAL NAME
LIST” (*1).)
MHPS MHPS Scanner home position sensor Scanner home position detection Transmission
type
Home position PCU PWB Sensor
OCSW OCSW SPF open/close detector Document size detection trigger Transmission
type
Close SCN PWB Sensor
PCS PCS Image density sensor Detection of density of toner patch
on the OPC drum
Reflection type - - PCU PWB Analog detector
PDSELX PDSELX Document size sensor (Light
reception) (PT)
Document size detection Photo
transistor
- - SCN PWB Other detector
RTH1 RTH1
Heat roller temperature sensor
(Center section)
Heat roller temperature detection
(Center section)
Thermistor - - PCU PWB Analog detector
RTH2 RTH2
Heat roller temperature sensor
(Edge section)
Heat roller temperature detection
(Edge section)
Thermistor - - PCU PWB Analog detector
RTH3 RTH3 Sub heat roller temperature
sensor
Sub heat roller temperature
detection
Thermistor - - PCU PWB Analog detector
SCOV SCOV SPF cover switch SPF cover open/close detection Transmission
type
Close SCN PWB Sensor
Code
Signal
name
Name Function/Operation Type
Connector level
PWB name Note
"L" "H"
1
1
1
1
1
1
1
1
1
1
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