Ricoh A219 Service Manual page 39

ELECTRICAL COMPONENT DESCRIPTIONS
Symbol Name
Tray Paper End
S3
Sensor
Registration Sensor
S4
By-pass Feed Paper
S5
End Sensor
S6 Exit Sensor
Scanner Home
S7
Position Sensor
Lens Home Position
S8
Sensor
Toner Density (TD)
S9
Sensor
Printed Circuit Boards
PCB1 Main Control Board
High Voltage Supply
PCB2 Board - C/G/B/T/S
AC Drive/DC Power
PCB3 Supply Board
Operation Panel
PCB4
Board
Lamps
Erase Lamp
L1
Quenching Lamp
L2
Exposure Lamp
L3
L4 Fusing Lamp
Others
Total Counter
CO1
Tray Heater (Option)
H1
Optics
H2 Anti-condensation
Heater (Option)
Exposure Lamp
TF1
Thermofuse
A219
CÓPIA NÃO CONTROLADA
Function
Informs the CPU when the paper tray runs
out of paper.
Detects the leading edge of the copy paper
to determine the stop timing of the relay
roller clutch, and detects misfeeds.
Informs the CPU when there is no paper in
the by-pass tray.
Detects misfeeds.
Informs the CPU when the 1st scanner is at
the home position.
Informs the CPU when the lens is at the
home position.
Detects the ratio of toner to carrier in the
developer.
Controls all copier functions.
Provides high voltage to the charge corona,
grid, development bias, transfer corona, and
discharge plate.
Drives the exposure lamp, fusing lamp, and
main motor. Rectifies 30 Vac and 8 Vac input
and outputs 5 Vdc and 24 Vdc.
Informs the CPU of the selected modes and
displays the situation on the panel.
Discharges the drum outside of the image
area. (Provides leading/trailing edge and
side erases.)
Neutralizes any charge remaining on the
drum surface after cleaning.
Applies high intensity light to the original for
exposure.
Provides heat to the hot roller.
Keeps track of the total number of copies
made.
Turns on when the main switch is off to keep
paper in the paper tray dry.
Turns on when the main switch is off to
prevent moisture from accumulating in the
optics.
Provide back-up overheat protection around
the exposure lamp.
1-10
CÓPIA NÃO CONTROLADA
Index No.
28
30
29
23
40
22
26
1
2
3
6
4
5
20
25
34
32
39
21
SM