Ricoh Aficio MP2550B - Page 255

Electrical Component Defects
SM 4-53 D017/D018/D019/D020
Trouble-
shooting
Sensor Shorted paper size properly.
Open
APS Sensor 1: Original
Width
223-1 SIO
Shorted
The CPU cannot detect the
original size properly. APS
and ARE do not function
correctly.
Open
APS Sensor 2: Original
Width
223-4 SIO
Shorted
The CPU cannot detect the
original size properly. APS
and ARE do not function
correctly.
Open
APS Sensor 3: Original
Length
223-7 SIO
Shorted
The CPU cannot detect the
original size properly. APS
and ARE do not function
correctly.
Open
APS Sensor 4: Original
Length
223-10 SIO
Shorted
The CPU cannot detect the
original size properly. APS
and ARE do not function
correctly.
Open
APS Sensor 5: Original
Length
223-13 SIO
Shorted
The CPU cannot detect the
original size properly. APS
and ARE do not function
correctly.
Open
"Open Cover" is displayed
even the cover is closed.
Bridge Open Sensor
(Paper Exit)
701-3 CKB
Shorted
"Open Cover" is not
displayed even the cover is
open.
Open
"Open Cover" is displayed
even the cover is closed.
Bridge Open Sensor
(Relay)
701-1 CKB
Shorted
"Open Cover" is not
displayed even the cover is
open.