Ricoh SP5 Series Service Manual page 21

ELECTRICAL COMPONENT DESCRIPTION
Symbol
S29 Base Plate Down
S30 Left Tandem Paper
End
S31 3rd Tray Paper
S32 Tray Down Sensor
S33 Duplex Entrance
Sensor
S34 Duplex Transport
Sensor 1
S35 Duplex Transport
Sensor 2
S36 Duplex Transport
Sensor 3
S37 Duplex Jogger HP
S38 Relay
S39 Registration
S40 Guide Plate Position
S41 Fusing Exit
S42 Exit
S43 Tray Paper Limit
PCBs
PCB1 SBICU
PCB2 PSU
PCB3 IOB
PCB4 SBU
PCB5 Scanner Motor Drive
PCB6 Lamp Regulator
PCB7 DC/DC Converter
PCB8 LDDR
Name
Detects when the bottom plate is
completely lowered to stop the 1st
tray lift motor.
Informs the CPU when the left tandem
tray runs out of paper.
Detects whether there is paper or not
in tray 3.
Informs the CPU when the bottom
plate is completely lowered, to stop
the 3rd tray lift motor.
Detects the leading and trailing edges
of the paper to determine the reverse
roller solenoid on or off timing.
Detects the position of paper in the
duplex unit.
Detects the position of paper in the
duplex unit.
Detects the position of paper in the
duplex unit.
Detects if the duplex jogger fences
are at the home position or not.
Detects misfeeds.
Detects misfeeds and controls
registration clutch off-on timing.
Detects whether the registration guide
plate is closed or not.
Detects misfeeds.
Detects misfeeds.
Detects paper overflow on the output
tray.
Controls all base engine functions
both directly and through other control
boards.
Provides dc power to the system and
ac power to the fusing lamp and
heaters.
Controls the mechanical parts of the
machine (excluding the scanner unit
section), and the fusing lamp.
Contains the CCD, and outputs a
video signal to the SBICU board.
Drives the scanner motor.
Provides dc power to the exposure
lamp.
Generates dc voltages.
Controls the laser diodes.
Function
1-18
June 30, 1998
Index
No.
76
73
135
134
65
66
68
71
69
104
106
105
107
108
109
23
57
52
21
51
22
19
27