Chapter 4: Troubleshooting
Service Mode
4-6 Service Manual
4.1.7 Diagnostics
Diagnostics provides the following functions:
• Temperature A/D Channels
•VGA Test
• Touch Panel Buttons / Switches
•Alarm Tests
•Odometer
•Logs
• Heat Engine Check
4.1.7.1 Temperature ADC Diagnostics
This screen displays reference voltages, readings from both patient probe thermistors, one fixed thermistor
input, and the ambient temperature of the Control Board.
Expected Values
ADC Channel Raw Value Corrected Value
1 Vthref 2048 (+ / - 4) 1500 (+ / - 3) mV
2 Vo/t NA NA
3 Pat Probe Thermistor 1 NA Pat Probe Thermistor 2 ±0.3°C
4 Pat Probe Thermistor 2 NA Pat Probe Thermistor 1 ±0.3°C
5 Vref 37°C 2232 (+ / - 23) 37.3 (+ / - 0.2)°C
6 Ambient Temp NA NA
7 Unused NA NA
8 Vref 1P235 1706 (+ / - 8) 1250 (+ / - 6) mV
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