Carriage PCA
The carriage PCA has four main functions:
The nozzle7timing ASIC controls the firing of the print cartridges, using data from the shuffler ASIC on the main PCA.
A linear encoder senses the carriage position.
A line sensor enables automatic print7cartridge calibration.
A thermistor monitors the temperature near the print cartridges.
The carriage PCA is installed in the carriage assembly, component7side down to accommodate the operation of the linear encoder. A long 287conductor cable (trailing cable) connects the carriage PCA to the main PCA.
Voltage and Energy The carriage PCA requires 5 V @ 670 mA and 20 V @ 61 to 218 mA. The regulator for the 207V supply is located on the main PCA, but an active sense circuit on the carriage PCA senses the voltage at the high7frequency bulk charge source capacitors.
Carriage Processor System
The carriage processor system consists of the following:
Carriage processor
Nozzle timing ASIC
Servo processor interface
Analog7to7Digital (A/D) Converter
Print cartridges
Line sensor | |||
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| Thermistor | |
To Servo | 8052 | A/D Converter | |
Processor | Carriage |
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System | Processor | Line Sensor | |
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From Main |
| Cartridge | |
Nozzle | Cartridge | ||
Processor | |||
Timing ASIC | Drivers | ||
System | |||
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Carriage Processor
The carriage processor's primary task is to configure the nozzle7timing ASIC. It receives the configuration data from the servo processor. It controls the A/D converter used in the line and temperature sensors, and senses print7cartridge identity and continuity. It returns status and sensor data to the servo processor.
C3187790000 | FunctionalOverview 5729 |