Ricoh A151, Field Service Manual

Page: 255 / 397

3. ELECTRICAL COMPONENT DESCRIPTIONS
SYMBOL NAME FUNCTION LOCATION
Motor
M1 DF Drives all the document feeder components. 6
Solenoid
SOL1 Pick-up Solenoid Energizes to press the pick-up lever against
the stack of originals in preparation for
original feed-in. 1
Clutch
CL1 Feed Clutch Turns on to transmit main motor rotation to
the feed roller. 4
Switch
SW1 Lift Switch Informs the CPU when the DF is lifted and
also serves as the misfeed reset switch for
the DF. 9
Sensors
S1 Pulse Generator
Sensor Supplies timing pulse to the DF main board. 5
S2 Original Set
Sensor Informs the copier CPU that originals have
been placed and causes the Insert Original
indicator to go out. 3
S3 Registration
Sensor Sets original stop timing and checks for
original misfeeds. 2
Printed Circuit Board
PCB1 DF Main Board Controls all DF functions. 10
PCB2 DF Interface
Board Interfaces between the copier main board
and the DF. 12
Transformer
TR1 DF Transformer Steps down the wall voltage to 25 volts ac. 11
LEDs
LED1 Original Misfeed
Indicator Turns on when an original is misdeed. 8
LED2 Insert Original
Indicator Turns off when the originals are inserted into
the original table. 7
DO
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A296
FSM 7-3 A151/A152