Specifications

SYMBOL NAME FUNCTION INDEX
NO.
S11
Image Density
(ID) Sensor
Detects the density of the image on the
drum to control the toner density.
32
S12 Development
Unit Set Sensor
Sensors whether or not the development
unit is properly set.
18
Printed Circuit Board
PCB1 Main Board Controls all copier functions both directly
and through the other PCBs.
45
PCB2 AC Drive Board Drives all ac motors, the exposure lamp,
fusing lamp, quenching lamp, exhaust
blower motor.
59
PCB3 Main DC Power
Supply Board
Rectifies 26 and 10 Vac input and outputs
dc voltages.
55
PCB4 Auto Image
Density Sensor
(ADS)
Senses the background density of the
original.
39
PCB5 Optional DC
Power Supply
Board
Rectifies 26 and 10 Vac input and outputs
dc voltasges.
56
PCB6 Interface Board Interfaces between the copier main board
and all the optional equipment’s main board.
62
PCB7 Operation Panel
Board
Informs the CPU of the selected modes
and displays the situations on the panel.
50
Lamps
L1 Exposure Lamp Applies high intensity light to the original for
exposure.
49
L2 Fusing Lamp Provides heat to the hot roller. 37
L3 Quenching Lamp Neutralizes any charge remaining on the
drum surface after cleaning.
38
L4 Erase Lamp Discharge the drum outside of the image
area. Provides leading/trailing edge erase.
34
L5 Pre-transfer
Lamp
Reduces charge on the drum surface
before transfer.
31
Power Packs
P1 CC/Grid/Bias
Power Pack
Provides high voltage for the charge
corona, grid, and the development roller
bias.
46
P2 TC/SC Power
Pack
Provides high voltage for the transfer and
separation corona.
61
1 December 1990
1-20