Riso ComColor X1 series Technical Manual page 357

Electronic Compnents
2-2. Engine Control PCB (X3-ENGINE-PCB)
2-2-1. Role of Board
Main roles of the engine control PCB are as follows.
• Controlling the power supply (transition to sleep, recovering, and so on)
• System management (managing machine code and internal data, processing error, executing test
modes)
• Controlling ink supply (processing to identify ink, fi ll the printer with ink, circulate ink, supply ink, and
dispose of ink)
• Controlling head maintenance (head cleaning and other processes)
• Controlling paper transfer
• Controlling printing (generating images, performing adjustment, and other processes)
• Controlling optional equipment
• Controlling actuators and sensors used in the operations mentioned above
2-2-2. Primary Components
1) CPU for system control (SH2A)
The CPU (SH2A) is connected to the controller PCB via the image processing PCB. It conducts required
data transmission based on printing conditions and expansion status of recorded data.
2) Peripheral parts related to the CPU
RMGA2 (actuator and sensor control and so on, through extended functions)
NOR fl ash memory (stores CPU programs and data)
SD-RAM memory (provides the CPU work area)
FRAM memory (for the CPU data buffer)
3) Paper transfer control DSP (controller)
Controls the paper transfer system (actuators, sensors, and other parts)
4) Voltage required by onboard devices is generated on the board (Refer to the following table)
Generated Voltage
+3.3V
+1.25V
+3.3V
+1.9V
Rev.1.00
Original Voltage
+5VSP CPU (SH2A), auxiliary CPU (F2MC), memory, and other uses
+3.3VSP CPU (SH2A)
+5V (Main) DSP, RMGA2, and other uses
+3.3V DSP
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