ELTRA CS-800 - General Test Points; Supply Voltages and Thermostatic Control Circuit; Supply Voltages for IR Signal Processing Circuit

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4.2.2 105BGeneral test points
4.2.2.1 Supply voltages and thermostatic control circuit
TP 1: GND
TP 7: IR source voltage
TP 12: + 5V supply
TP 13: Heating transistors control voltage
TP 26: IR temperature actual value
TP 27: +24V supply
TP 28: IR temperature set point
4.2.2.2 Supply voltages for IR signal processing circuit
TP 6: +12V
TP 21: -12V