Power Components
The following are the power components on the main PCA:
Carriage and Media Motor Drivers
Two motor driver ICs and heatsinks.
PrintCartridge Voltage Regulator
To regulate the amount of energy given to the print.cartridge heating resistors, a precise voltage regulator controls the print.cartridge voltage supply. The regulator power device is located on the main PCA, but the cartridge resistors and drivers are located on the carriage PCA. To reduce the effect of the long path between the voltage regulator output and the cartridge resistors, an active sense circuit on the carriage PCA feeds back an error signal to the main PCA. On the carriage PCA, the cartridge supply voltage is sensed by a precision resistor divider and compared with 2.5V reference. This error is amplified, buffered, and transmitted to the main PCA through the trailing cable. The voltage is regulated by a regulator on a heatsink.
Fan Driver
The plotter electronics are cooled by a fan, which may be turned on and off by the main processor. A two.pin connector is used for the fan. Pin 1 connects to the black wire of the fan harness and to the drain of a driver FET on the Main PCA. Pin 2 connects to the red wire of the fan harness and to +12V on the Main PCA.
5.28 FunctionalOverview | C3187.90000 |