� A : B+ Line. � B : B� Line. � Voltage and waveforms are dc with respect to ground under no-signal (detuned) conditions. � no mark : FM Voltages are taken with a VOM (Input impedance 10 M�). Voltage variations may be noted due to normal production tolerances. Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. Circled numbers refer to waveforms. Signal path. F : TUNER (FM/AM) L : VIDEO (AUDIO) J : CD (ANALOG) Abbreviation CND : Canadian model.