Oki IP-6620 Maintenance Manual page 544

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Carriage board (PCB-ASSY-HCB1M)
The carriage board controls the print heads and the carriage, and allows the following
functions.
- Receives image data from the IPB5 board, and transfers the data to the heads.
- Performs tickling and spitting to secure adequate head conditions.
- Controls the actuators and sensors on the carriage.
- FPGA-PTG as an FPGA with functions to:
- transfer data to the heads; and
- control actuators, sensors, and AD convertor on the carriage.
The configuration data can be rewritten using a USB drive.
- Generates the print head drive voltage (14 channels).
- Drives the print head heaters.

Actuator board (PCB-ASSY-ACT3)
This board controls the actuators and the sensors in the printer, and allows the following
functions.
- Controls the carriage scan motor and media feed motor.
- Controls the capping unit and wiping unit.
- Controls the suction fans, exhaust fan, rear fans and the other fans.
- Controls the motors and sensors in the ink delivery system.
- Interfaces with the ink cartridges.
- Interfaces with the TRC-MW board.
- Controls the media heaters (preheater, printheater, and afterheater).
- Controls the other motors and actuators.
- FPGA-ABC is an FPGA with functions to control devices on the ACT3 board. The
configuration data can be rewritten using a USB drive.

Triac board (PCB-ASSY-TRC-MW)
The triac board controls the AC power to be supplied to media heaters, and has the following
functions.
- Controls ON/OFF of the AC power supplied to each heater.
- Generates a zero cross signal on AC power.

Ink board (PCB-ASSY-INK4)
The ink boards connect the ink cartridges to the subtanks. Each ink cartridge requires one ink
board.
OKI Data Infotech Corporation CONFIDENTIAL
Chapter 8 Operation Mechanism
8-23