Control Panel; Engine Control Board; Registration Sensor Board; Led Relay Board - Oki ES3640MFP Component Replacement Manual

Control Panel

The Control Panel is the primary interface to the printer's functions and includes the display,
keypad, and status LED.
Fiery Control PCB
The Fiery Control PCB receives host data through the USB or Ethernet port. The received
data is buffered and stored, and then sent to the print engine in a rasterized format. The
Fiery Control Board connects to the Engine Control Board directly.
The Fiery Control board contains:
• Memory – RAM
• Flash DIMM
• NVRAM - Control Panel and network settings.
• Configuration Chip - determines the printer configuration.
• Hard Drive

Engine Control Board

The Engine Control Board synchronizes the print process by controlling the LED Heads,
motors, fans, sensors, solenoids, clutches and Fuser temperatures. The Engine Control
Board also controls the voltages to the Imaging Units and the print speed to compensate for
changes in media and environmental conditions.
Major Functions:
• Communicates with the Fiery Control PCB
• Receives information from the sensors and/or switches.
• Generates the image based on information from the Fiery Control Board.
• Controls high-voltage sent to the Imaging Unit to perform charging development,
primary and secondary transfer.
• Distributes the low-voltage DC power from the Low-Voltage Power Supply.

Registration Sensor Board

Located in the Registration Sensor Assembly, the Registration Sensor Board includes the
two sensors that monitor color registration.

LED Relay Board

Distributes power from the LVPS to the four LED Heads.