Icom IC-F21S service manual SW-A Unit, Q1 XP4216

Page 36

12-2 SW-A AND SW-B UNITS
• SW-A UNIT
				S1	2	CP10	CBI0
				S1		CP11	CBI1
			1	1		CP11	CBI1
			1	1	3	CP12
				C 2	4	CP12	CBI2
				4	4		CBI2
				8	5	CP13	CBI3
	TP76N00N-15F-10KA-2251					CP9	CBI0
							CBI0
						CP1	VOLOUT
	R1					CP1	VOLOUT
	R1					CP2	VOLIN
CP8	F1					CP2	VOLIN	RX (SQL OPEN) 4.8 V
CP8	F1					CP3	VCC	RX (SQL OPEN) 4.8 V
HV						CP3	VCC	TX	0 V
HV						CP4	RLED	TX	4.8 V
						CP4	RLED	TX	4.8 V
		Q1 XP4216				CP5	TLED	RX (SQL OPEN)	0 V
		Q1 XP4216				CP6	GND
		1	6			CP6	GND
		1	6
		2	5
		3	4	RX (SQL OPEN) 0 V
		3		RX (SQL OPEN) 0 V
				TX		4.1 V
		DS1		RX (SQL OPEN) 2.1 V
		LNJ107W5PRW		RX (SQL OPEN) 2.1 V
		LNJ107W5PRW		TX		0 V
	RX (SQL OPEN) 4.1 V		G	TX		0 V
	RX (SQL OPEN) 4.1 V		G
	TX	0 V				R2 330
						R2 330
			R
						R3 560
			RX (SQL OPEN)			0 V
			TX			2.4 V
• SW-B UNIT

CHASSIS UNIT

2CH VERSION

S1

W1

W2

EMERGENCY VERSION

S1

	TP76N00N-15F-10KA-2251				CP9	CBI0
	TP76N00N-15F-10KA-2251				CP1	VOLOUT
	R1				CP1	VOLOUT
	R1				CP2	VOLIN
CP8	F1				CP2	VOLIN	RX (SQL OPEN) 4.8 V
	F1				CP3	VCC

HV
HV					CP4	RLED	TX	0 V
							TX	0 V

		Q1 XP4216			CP5	TLED	TX	4.8 V
		1	6		CP6	GND	RX (SQL OPEN)		0 V
		2	5
		3	4	RX (SQL OPEN) 0 V
				RX (SQL OPEN) 0 V
		DS1		TX	4.1 V
		DS1
		LNJ107W5PRW		RX (SQL OPEN) 2.1 V
	RX (SQL OPEN) 4.1 V		G	TX	0 V
	TX	0 V
			R		R2 330
			R
					R3 560
			RX (SQL OPEN) 2.1 V
			TX		0 V
		12 - 2

Image 36

Contents UHF FM Transceivers Introduction Ordering PartsRepair Notes Table of Contents Specifications ‘ General‘ Transmitter ‘ ReceiverInside Views Main Unit TOP ViewBottom View Disassembly Instructions Removing the ChassisRemoving the Main Unit Circuit Description Receiver CircuitsTransmitter Circuits PLL Circuit GeneralVCO Circuit PLL CircuitPower Supply Circuits Voltage Line Port AllocationsPin Port Description Number Output Expander IC IC15 3 D/A Convertor IC IC9Adjustment Procedures PreparationScreen display exampe JIG cableSPE GNDDC power cable connections DC Power Supply GNDConnection PLL Adjustment PLL LockMain VoltageSoftware Adjustment Sensitivity SquelchLevel SQLSection Parts List UnitMain Unit Coil Eljfc R68M-F Array Electrolytic ECEV1CA470SP Connector Mechanical Parts and Disassembly AccessoriesChassis Parts Screw abbreviations B0, BT Self-tappingIC-F21S SEMI-CONDUCTOR Information Transistor and FET’SDiodes Board Layouts Main UnitFT1 IC6SW-A and SW-B Units TOP View SW-A UnitSW-B Unit Bottom View SW-A Unit CBI0 CBI1 CBI2 CBI3GND Tled Rled VCC Volin Volout Parts List Disassembly InformationBC-146 Optional Desktop Charger Information Charge UnitVoltage Diagram Board LayoutBlock Diagram SW-A/SW-B Unit S1Voltage Diagram 2SC4215 ODTC144EU Section Voltage Diagram SW-A Unit Q1 XP4216Page 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan