Wiring Diagram - §1 - Epson ColorPage EPL-C8200 Service Manual

EPSON ColorPage EPL-C8200
A.3.3.1 Wiring Diagram - §1
Table A-20. Signal Description - §1
Signal Name
HEATER ON (L) 5VDC Control signal to turn the P/R Heater and H/R Heater
ON/OFF.
24VDC-I/L Relay control signal to detect the interlock switches
and interlock connectors. Relay control signal in the
LVPS.
5VDC-LD Power source voltage for the LD Assembly in the ROS
Assembly.
SOS Scan start reference signal based on the light input to
the SOS Sensor in the SOS PWB.
VREF Reference voltage for the target light quantity.
LD ENB Control signal that enables the LD to turn on or forces
it to turn off. (High: OFF/Low: ON)
SCANNER MOTOR ON (L) Control signal to turn the Scanner Motor in the ROS
5V Assembly ON/OFF.
PCONT Mode control signal to control the LD light quantity
(APC). (Low: Sample mode/High: Hold mode)
VDATA Pixel data signal to turn the LD ON/OFF. (High: ON/
Low: OFF)
FRONT COVER SWITCH Signal to detect the Front Cover open (OFF)/close
ON (L) 5VDC (ON) from the Front Cover Switch L.
Chapter A Appendix
Description


LVPS overcurrent protection circuit
If the power voltage (24VDC/5VDC) is shorted, all power is turned
off. After the shorted state is canceled, the system recovers by
turning off the power and by turning on again after 2 or 3 minutes
later.


LVPS overvoltage protection circuit
If the power voltage (24VDC/5VDC) becomes overvoltage, all power
is turned off. The operating point is 7VDC or less for 5VDC and
27~36VDC (reference) for 24VDC. The system recovers by turning
off the power and by turning on again after 2 or 3 minutes later.


Power off by Front Cover Switch R
When the Front Cover Switch R is turned off, the 24VDC-I/L circuit
is shut off, and the power supply to the MCU PWB (24VDC) and the
ROS Assembly (LD Assembly) (5VDC-LD) is turned off. If the Front
Cover Switch R is turned on, the 24VDC-I/L is input to the LVPS
Relay circuit and the 24VDC and 5VDC-LD are output from the
LVPS. The Front Cover Switch R is also an interlock switch for the
5VDC-LD circuit.
The Front Cover Switch R and Top Cover Switch are
interlock switches that prevent exposure to the laser
beam. Never tamper with these switches. Direct eye
exposure to the laser beam may cause eye injury or
blindness. For any operation involving these switches,
follow the instructions in this manual.
Revision A
A-33