Icom IC-F21S service manual Inside Views, Main Unit TOP View, Bottom View

SECTION 2 INSIDE VIEWS

• MAIN UNIT

TOP VIEW

Power amplifier (Q1: 2SK2974)

Pre-drive (Q2 : 2SK2973)

YGR amplifier (Q3:Q4: 2SC35852SC5107 )

TX/RX switch (D3, D4: MA77)

VCO circuit

PLL reference oscillator (X1: CR-671A 15.3 MHz)

Low-pass filter circuit (IC12,16: NJM12904V)

Expander IC

(IC15: BU4094BCFV)

BOTTOM VIEW

Antenna switching circuit (D1:D9, 1SV307D10: MA77)

RF amplifier (Q15: 3SK293)

APC

(IC2: TA75S01F)

AF amplifier (IC4: TA7368F)

Analog switch

(IC6: BU4066BCFV)

D/A converter (IC9: M62363FP)

Crystal filter (FI1: FL-313)

FM IF IC

(IC3: TA31136FN)

1st mixer (Q19: 3SK272)

PLL IC

(IC1: MB15A02PFV1)

CPU

(IC7: HD6433664A24FP)

EEPROM

(IC11: HN58X2416TI)

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