Icom IC-4A Instruction Manual page 21

PLL UNIT SIDE
53 (RF Power Switch)
S2 (DUPLEX/SIMPLEX Switch)
S1 (DUPLEX MODE Switch)
C117 (PA Output Trimmer)
114 (X3 +5KHz Frequency Adj.)
L10 (X3 OKHz Frequency Adj.)
L11 (X4 OK Hz Frequency Adj.)
L15 (X4 +5KHz Frequency Adj.)
X4 (47.778MHz Simplex TX Crystal C115 (PA Output Trimmer)
X3 (47. αν ον —5MHz Dup ТХ
Х5 (48333Мн> +5MHz Dup TX
Crystal)
X2 (45.355MHz RX Crystal)
L16 (X5 +5KHz Frequency Adj.)
L 13 (X2 +5KHz Frequency Adj.)
L12 (X5 OKHz Frequency Adj.)
L9 (X2 OKHz Frequency Adj.)
IC2 (TC5081 Phase Detector)
014 (25С3101 RF Power Amp)
C109 (Driver Output Trimmer)
C108 (Driver Output Trimmer)
C94 - C97 (TX Band-Pass Filter
Trimmers)
— L5 (VCO Free-Run Frequ Adj.
X1 (6.826MHz Reference Frequency | Í нене ы
Crystal)
IC3 (TC5082 Oscillator/Divider)
VCO circuit
082 - C85 (ТХ Band-Pass Filter
C64 - C66 (ВХ LO Band-Pass Filter Trimmers)
Trimmers}
—19—