Field output circuit: LA7838

LA7838 (LA7837 can also refer to this circuit, the difference between the two is only the output current) Pin 1: 9.2V - VCC1 power supply Pin 2: 4.8V - vertical trigger input pin 3: 4.8V - monostable and multi-harmonic Pin 4 of the oscillation time constant setting terminal: 4.8V - Field amplitude control terminal Pin 5: 0.5V - 50/60HZ conversion field amplitude stabilization control terminal (50HZ: L 60HZ: H) Pin 6: 4.8V - Sawtooth wave Voltage forming terminal pin 7: 4.6V - Field output AC and DC feedback input terminal pin 8: 24.5V - VCC2 power supply pin 9: 1.9V - Pump power supply output terminal 10 pin: 1.5V - Anti-self-excited negative feedback Input pin 11: 0V - ground pin 12: 15V - field scan output pin 13: 24V - field output power supply