Kenwood TK-940 NJM78L05UA, Eeprom, DTA114EU--DC, DTA114YU, DTC114EU, DTA114TU, DTC3 14TK

DESCRIPTION OF COMPONENTS

	TX-RX UNIT (X57-4590-XX)					-10 : TK-940 -11 : TK-941
1	'
	1	Ref. No.	1	Parts No.	1	Use/Function					OperationlCendition
	[i~:		1	NJM4558E		---		1
	(	IC1	1	BU4013BF	/	Power supply circuit loglc control
	;1;		1			Audio amplifier (Detected output)
		1		NJM78L05UA		Voitaqe reuualtor					A
				p --P O 8		Voltage regulator
				NJM4558E		Act~vef~lter
		lC6		~ 6 2 3 6 3 ~ ~		Level adluster
						IF system				U4094BCF----. l=L~
				NJM4558E
				NJ~ 4 5	5 ~ t		~
						Aud~opower amplifier
						--
					--				----
I	I	IC13		NJM2904M		Comparator, DC amplifier					-
	El			--		-			--
			' AT24C02NlOS12.7			EEPROM	T , a 7 a c i t y 2-Khit.
				NJM78L05UA		Voltage regulator

I,

I*'

		--	--
		---
IC208 TC7S32F	DC swltch	"L"when IC207 access.

FAA::~fl'ter
						"L" when writlng program or data from external equipment.
							--
1	1	DTA114EU--(DC	I	switch		On when power swltch on
				---			---then Q3 turn off
		DTCll4EU		DC swltch	f.-wm=d,
a 3				DC switch		On when power swltch on.
Q4		2SA1641 (S,T)		DC switch		On when power swltch on.
Q5		DTA114YU		DC switch		Oh when power switch off, then D22 turn on.
				--		RX . OV, TX : 8V
Q6, 7		2SB1188iQ, R)		DC switch
				---		RX : 8V, TX : OV
0 8		2SA1362iY)		DC switch
0 9				DC switch		On when PLL lock.
Q10		--DC switch				On when PTT switch on.
0 1 1		DTC114EU				On when RX.
Q12		DTC114EU		DC switch		On when TX.
		--				On when horn control on.
Q13		DTC114EU		DC s w ~ t c h
						On when horn control on.
Q14		2SD162415)		DC switch-
Q15		2SC4116(GR)-		Ripple filter
				RX Ist IF amplifier		45.0375MHz (TK-9401,39.0375MHz (TK-941)
Q16		2SC4215(Yi
				-
		-		Muting switch		On when no beep sound at busy.
0 17		DTA114TU
			1 RF amplifier
Q18		2SC4226(R24)
				-		On when no beep sound at busy.
0 1 9		DTC144EU---		DC switch
Q20		DTC3 14TK		Muting switch		Off when busy.		--
		3SK241(R)
						APC controller.
						On when PTT switch on.
Q26
Q27		DTA114YU
0 2 8
Q29		D T C 1 1 4 G	I		1	On when IGN line "H".
Q30		2SA1586(Y,GR)		DC switch	I	On when modular lack SB terminal shorted.