Electrical - Epson ColorPage EPL-C8200 Service Manual

EPSON ColorPage EPL-C8200

2.5.14 Electrical

1. Front Cover Switch R
The Front Cover Switch R (interlock switch) detects whether the
Front Cover Assembly is opened or closed. If open, the interlock
switch shuts off the 24 VDC-I/L and 5 VDC-LD circuits to cut off the
output (24VDC/5VDC-LD) from the LVPS. The Front Cover Switch
R has two switches for the 2 circuits above.
2. Front Cover Switch L
The Front Cover Switch L detects whether the Front Cover
Assembly is opened or closed. If it detects that the Front Cover
Assembly is open, it halts the printer operation (a safety switch).
3. Top Cover Switch
The Top Cover Switch (interlock switch) detects the Top Cover
Assembly. If it detects no Top Cover Assembly, it cuts off the 5VDC-
LD circuit.
4. Developer Fan
The Developer Fan exhausts the heat from inside the printer,
preventing overheating.
5. LVPS
The LVPS provides the AC power (from the power supply unit) to
the H/R Heater and P/R Heater (Fuser Assembly), and generates
stable low voltage DC power which is used by the logic circuits and
others. The LVPS includes the power supply circuit, control circuit
(for H/R Heater and P/R Heater), inlet and power switch.
6. HVPS
The HVPS provides high voltage to the following components. The
high voltage is needed for the various printing processes (Charging,
Developing, 1st Transfer, 2nd Transfer, Detach).

BCR (Drum Cartridge)
Chapter 2 Operating Principles

Magnet Roll (Developer Assembly)

1st BTR/Contact Roll (Transfer Assembly)

Detach Saw (2nd BTR Assembly)
7. MCU PWB
The MCU PWB controls the print operation using the data from the
printer controller and the sensors and switches.
Its main functions are as follows:

Communication with the PWB Controller

Receiving data from the sensors and switches.

Controlling the ROS Assembly, Fuser Assembly and Motors
(Process Motor Assembly, P/H Motor Assembly, Dispense
Motor Assembly, Rotary Motor Assembly).

Print sequence control

Distribution of low voltage (DC) power from the LVPS to various
components.
8. Environment Sensor
The Environment Sensor detects the temperature in the printer. (It
detects the temperature using its internal thermistor. A thermistor is
an element that changes its resistance by temperature.) Based on
the detected temperature, this sensor controls the supply voltage to
the BCR and the Warm-up Fuser control temperature.
9. Controller Fan
The Controller Fan exhausts the heat from inside the Controller
PWB, preventing the Controller PWB from overheating.
10. Controller PWB
The Controller PWB receives data from the host, does the printing
operation, and controls the whole printer.
Revision A
2-42