2 - 3
VCO
• MAIN-A UNIT
(BOTTOM VIEW)
AF/TONE FILTER
(IC16)
AF MUTE SW
(Q35)
MODULATION LINE SW
(Q31)
REFERENCE OSCILLATOR
MODULATION BUFFER
(IC19)
D/A CONVERTER
(IC18)
REFERENCE FREQUENCY
OSCILLATOR (X2)
AF AMP
(IC15)
EXPANDER
(IC17)
AF LINE SW
(IC14)
D/A CONVERTER
(IC20)
DRIVE AMP
(Q9)
RF AMP
(Q2)
1ST MIXER
(Q3)
2ND IF FILTER
(For wide mode)
(FI2)
2ND IF FILTER
(For narrow mode)
(FI6)
+5V LINE REGULATOR
(Q27)
T8 LINE REGULATOR
(Q25)
