Fukuda Denshi FCP-7101, Service Manual

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Electric Circuit Diagrams
5 - 5
● MAIN BOARD (PCB-6950) circuit
The main board consists of the following major circuit blocks.
1. Digital logic block
2. ECG AMP block
3. Power supply block
1. Digital logic block
CPU section
The CPU adopting SH7727 carries out processing for basic operations of
ECG such as display of ECG waveforms and recording. It also monitors
the voltage of the backup battery and the temperature of the thermal head,
and performs processing related to the mark sensor. The CPU carries out
various other operations such as address bus control, data bus control, and
peripheral device control in accordance with the settings of the software.
FPGA section
The FPGA performs the following control operations.
･ ECG control
･
Various types of timing control
･
Thermal control
･ Motor control
･
Buzzer control