Electrical Component Descriptions - Ricoh FT7770 Service Manual

30
April, '89

ELECTRICAL COMPONENT DESCRIPTIONS

Motors
Feed-in (M-l):
Belt (M-2):
Inverter (M-3):
Solenoid
Inverter Gate (SOL-l):
Sensors
Feed-in (S-l):
Registration (S-2):
Exit (S-3):
Size (S-4):
One Turn (S-5):
Inverter Entrance (S-6):
Inverter Registration
(S-7):
Pulse Generator (S-8):
CFF Feed Hole Sensors (S-9)
CFF Set Sensor (S-10)
Switches
Feed-in Safety (MS-l):
Lift (MS-2):
Inverter Safety (MS-3):
Original Application
(SW-l):
Form Size Switch (SW-2)
PCBs
DF Main Board (PCB-1):
Indicator Board (PCB-2):
Drives the feed-in unit. (dc servomotor)
Drives the transport belt unit. (dc ser-
vomotor)
Drives the inverter unit and exit rollers.
(dc servomotor)
Opens and closes the inverter gate.
Detects the leading edges of originals, and
turns off the Insert Original indicator.
Sets feed-in motor and belt drive motor off
timing, and serves as a jam detector.
Jam detector.
Determines the original size.
Detects 360° rotation of the separation
rollers.
Sets belt motor off timing whem in inver-
sion mode, and serves as a jam detector.
Sets belt motor and inverter motor off tim-
ing and serves as a jam detector.
Provides clock pulses to the main board.
When the sensor detects the feed holes, it
generates ON/OFF signals. The main board
uses these signals to determine when to stop
the computer form.
Detects whether a computer form is inserted
in the rear edge guide.
Resets the Check Original indicator and
prevents feed-in unit operation.
Safety switch, DF jam reset switch, and
detector for original removal (Take Out
Original indicator).
Safety switch.
Changes the belt motor stop timing.
Changes the belt stop timing in CFF mode
according to the selected form size.
Controls all DF operations.
Displays the status condition of the DF.
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