Icom IC-F6021 Service Manual page 8

• MAIN-A UNIT
(BOTTOM VIEW)
AF MUTE SWITCH
(Q35, Q36)
Ext. MODULATION
LINE SWITCH
(Q31)
VCO
REFERENCE OSCILLATOR
MODULATION AMP
(IC19)
REFERENCE FREQUENCY
OSCILLATOR (X2)
D/A CONVERTER
(IC20)
DISCRIMINATOR
(X1)
EXPANDER
(IC17)
D/A CONVERTER
(IC18)
ANALOG SWITCH
(IC14)
AF PRE-AMP
(IC15)
+5V LINE REGULATOR
T8 LINE REGULATOR
(Q27,Q28)
(Q25)
AF/TONE FILTERS
(IC16)
2 - 3
DRIVE AMP
(Q9)
1ST MIXER
(Q3)
2ND IF FILTER
(FI2)
2ND IF FILTER
(FI6)
RF AMP
(Q2)