Power
Supply
The power supply (or PSU) is a linear supply that provides all of the
voltages used in the system. The input line voltage is selected by the
orientation of the fuse module, allowing the user to match the
environment line voltage for proper operation.
Input Voltages
110V-120VAC 3A-50/60 Hz
220V-240VAC 1.5A 50/60 Hz
Output Voltages
5 VDC
3A
Used for logic circuits
12 VDC
2A
Used for powering external peripherals
150 VDC
0.25A Used for Printhead drive voltages
36 VAC
9 A
Used to heat Printhead
Power supply voltage checks should be made with the supply loaded
and unloaded. Sometimes failures of other circuits can give the
impression that the power supply voltage is incorrect. Moreover,
sometimes supplies can give good voltages in unloaded condition, yet
not function when circuits are connected to it.
All potentiometers on power supply are set at the factory and should
NOT
be adjusted in the field. If voltages are incorrect, a fault cannot
be remedied by adjusting a potentiometer.
CPU PCB
The CPU PCB contains a 32-bit CMOS microprocessor for high
performance data manipulation. 1 megabyte of RAM that is backed
up by battery is used to store printing parameters and messages.
The RAM will also receive the operating instructions from the
firmware module at power up.
Messages and print parameters are programmed into the RAM with
a hand held keypad that uses RS-232 communication through the
Front Port connection. The FoxJet controller can also be
programmed with a PC via the Rear Port connection. The user can
download ASCII command strings or use SystemMaster to remotely
control the FoxJet Printing systems.
The CPU will convert messages into bitmap images that it will pass
to the driver board to be held in a FIFO (first in, first out buffer). The
CPU will calculate the firing sequence based on user programmed
parameters and, when the photocell trigger occurs, send timing
pulse train to fire Printhead nozzles to driver board.
3-2
Theory of Operation
Summary of Contents for 6100
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