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2-6 Theory of Operation
NovaJet 500/630/700 Series Service Manual
Main Printed Wiring Assembly (MPWA)
CONTROL
PANEL
SERIAL
EEPROM
MICRO-
PROCESSOR
(CPU)
CRYSTAL
X1
STEPPER MOTOR
CONTROLLER
FLASH
EEPROM
DYNAMIC
RAM
(SIMM)
GATE
ARRAY
SERVO MOTOR
CONTROLLER
CARRIAGE
PWA
PARALLEL
DATA BUS
SERIAL
MEMORY CIRCUITS
INTERFACE CIRCUITS
Figure 2-5. Main Printed Wiring Assembly.
The Main Printed Wiring Assembly (MPWA) consists of six functional
areas:
1. Microprocessor (CPU)
2. Gate Array
3. Memory Circuits
4. Stepper Motor Controller
5. Servo Motor Controller
6. Interface Circuits: Serial & Parallel