GE MAC 1200

GE Medical Systems MAC 1200 V 1.2 Page 3
Information Technologies 227 492 21 Rev F
1
Device description 7
1.1 Block circuit diagram of entire instrument
12 Mechanical components 9
2 Functional description 11
21 Switching power supply 11
22 PCB NC Battery Charge 11
2.2.1 Charging circuit for the NC battery 11
2.2.2 Device behavior depending on the state of battery charge 12
23 PCB Control CS CI 12
2.3.1 Generation of internal power supplies 12
2.3.2 Switch On/Off circuit 13
2.3.3 ECG recording and front-end processing, 14
2.3.4 Controller core. 14
2.3.5 Real time clock 15
2.3.6 Memory 16
2.3.7 LCD graphics display interface 16
2.3.8 Keypad interface 17
2.3.9 Printhead control 17
23.10 Motor control 18
2.3.11 RS-232 interface 19
2.3.12 Buzzer 19
2.4 PCB Modem Supply CS M 19
2.5 Internal interfaces 19
2.5.1 Mechanical interfaces 19
2.5.2 Electronic interfaces 20
2.5.2.1 Interface to the switching power supply 20
2.5.2.2 Interface to the PCB NC battery charge 20
2.5.2.3 Interface to the LCD Graphics Display 22
2.5.2.4 Interface to the keypad 22
2.5.2.5 Interface to the printhead 22
2.5.2.6 Interface to the motor 23
2.5.2.7 Interfaces for production tests 24
2.5.2.8 Interface to PCB Modem Supply CS M 25
2.6 Interfaces to peripherals 26
2.6.1 Electronic interfaces 27
2.6.1.1 RS-232 interface 27
2.6.1.2 Patient input 28
2.7 Software Updates 29
2.8 Limitations 29
3 System test functions 31
3.1 General information 31
3.2
Test
start
31
3.3 Display test 32
3.4 Keyboard test
33