Icom IC-2720 Service Manual page 6

• CONTROL UNIT (BOTTOM VIEW)
Dimmer Dimmer circuit
(Q6-Q13: 2SC4116)
Mic amplifier Mic amplifier
IC5: TA75S558F IC5: TA75S558F
Q15: 2SC4116 Q15: 2SC4116
• MAIN UNIT (BOTTOM VIEW)
D/A converter D/A converter
(IC1: M62352GP) (IC1: M62352GP)
Analog switch Analog switch
IC2007: BU4066BCFV IC2007: BU4066BCFV
IC2010: BU4066BCFV IC2008: BU4066BCFV
IC2010: BU4066BCFV
+8V regurator +8V regurator
(IC2003: TA7808F) (IC2003: TA7808F)
Mic amplifier Mic amplifier
(IC2014: TA75S558F) (IC2014: TA75S558F)
Control unit CPU Sub CPU
(IC4: HD6473847RH) (IC4: HD6473847RH)
Data comparator Data comparator
(IC1: TA75S01F, D2: MA8047) (IC1: TA75S01F)
+8V regurator +8V regurator
Q1: 2SC4116
(Q1: 2SC4116)
Q3: 2SA1586
D1: MA8091
2 - 2
+5V regurator +5V regurator
(IC3: TA78L05F) (IC3: TA78L05F)
Reset IC Reset IC
(IC2: S-80945CLMC) (IC2: S-80945CLMC)
UHF low-pass filter circuit
Ceramic bandpass filters
FI1000: CFWM450E
FI1001: CFWS450HT
FI1002: CFWM455E
FM IF IC
IC1001: TA31136FN
IC1004: TA31136FN
PLL circuit
+5V regurator
(IC2002: TA7805F)
APC amplifier
(IC2: TA75S01F)