Icom ID-31A

2 - 4
• MAIN UNIT
(BOTTOM VIEW)
STEP-DOWN CONVERTER
(IC4)
+4 V REGULATOR
(IC3)
PLL
(IC6)
BPF TUNING VOLTAGE
BUFFER
(IC12)
RF AMP
(Q47)
1ST IF MIXER
(Q46)
AF POWER AMP
(IC2)
CHARGING LINE DRIVER
(Q6)
IF IC
(IC13)
AF LINE SW
(IC8)
TONE FILTER
(Q31)
AF POWER AMP
REGULATOR
(Q16)
TX POWER SETTING
VOLTAGE BUFFER
(IC14)
1ST IF FILTER
(FI3)