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(2)S1在BL或BH位置UHF高放和变频电路没有直流电压而不工作,此时VD1也截止。直流电压+V加到VHF高放和本振电路中,V段电路进入工作状态。
(2) S1 in the BL or BH position UHF high frequency and inverter circuit does not work without DC voltage, VD1 is also cut off at this time. DC voltage + V added to the high-VHF and local oscillator circuit, V-section circuit into the working state.