The aircraft built by the DC inverter flash , flash trigger circuit and the like , C1, T1 and other components oscillating tube VT three-point oscillator circuit inductance complete low voltage DC → AC → DC high voltage high voltage transformation for Xe flash power . Where T1 is the primary L1 , L2 is the feedback coil , L3 for the high voltage output of the secondary coil . Bias resistor R1 determines the DC operating point of the VT .m4fservice manual download site
Flash pictures when needed , the natural light / flash selector switch K2 off , open the lens cover , and its linkage power switch K1 is closed , VT began oscillation , the oscillation frequency of about 10 ~ 12kHz. After the AC voltage generated by L3 VD (1A, 1000V) rectifier to the storage capacitor C2 (200μF/330V) while charging by R2, R3 to the trigger capacitor C3 (22nF/400V) charged. When the voltage across C2 rose to about 300V, Ne starter neon lights indicate charging is completed , you can flash shooting . At this time pushed the shutter button , the shutter blades when open to the lens cross-sectional area of about 80% , with the shutter closed linkage trigger switch K3 , C3 through K3 and trigger transformer T2 primary rapid discharge , high voltage pulses generated more than 6kV in T2 secondary and added to the flash trigger electrode , so that the lamp inside the xenon (Xe) ionized conductive. So C2 through rapid discharge lamp , which releases energy in the form flash tube . After film exposure , the shutter release , the blade closed , K3 disconnect , VT start-up , C2, C3 charge , ready for the next film in flash photography .m4fservice manual download site