Icom IC-T90A manual AF Unit, RF Unit, Top view Bottom view

• AF UNIT	• AF UNIT	1st AF amplifier
Top view	Bottom view
		(Q205: 2SD2216)

		AF mute
		(Q251: 2SJ364)
		AF power amplifier
		(IC252: TA7368F)
		AM detector
		(Q201, Q202: XP6501)
	FM IF IC
	(IC151: TA31136FN)
	IF amplifier
	(Q102: 2SC4403)
	Crystal oscillator
	(X1: VR-583, 13.800 MHz)
	T5V regulator
	(Q11: XP1501, Q55: 2SB1132)
• RF UNIT	• RF UNIT

R3V regulator Q208: 2SA1576

Q209: XP1501

AM/FM switch (Q206: XP4315)

Top view	Bottom view
	Drive amplifier	629.995–999.90 MHz RF amplifier
	(Q52: 2SK3475)	(Q452: 2SK3475)
		75.995–229.995 MHz
		RF amplifier
		(Q351: 3SK320)

Pre-drive	R3 regulator
(Q54: 2SC5289)
Power amplifier	(Q353: XP4312)
	0.495–29.995 MHz RF amplifier
(Q51: 2SK3476)
VCO circuit	(Q302: 2SC5006)
1st mixer	29.995–75.995 MHz
(IC351: ∝PC2757TB)	RF amplifier (Q303: 2SC5006)
T3 regulator
(Q56: XP4315, D50: MA6S121)
144 MHz TX high-pass filter circuit
50 MHz TX low-pass filter circuit

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