JVC KD-LX555R service manual VIN1-A VIN1+A VCCP1 VO+ VO VO2+ VO2 FR VO3+ VO3

4.9LA6579H-X (IC1681) : 4-Channel bridge driver

• Pin layout & Block diagram

VIN1-A

VIN1+A

VCCP1

VO+

VO-

VO2+

VO2-

FR

VO3+

VO3-

VO4+

VO4-

VCCP2

VIN4

VIN4G

1				[H]				28
	-		VIN1_SW	[L]					VIN1
			[H]: OP-AMP_A
2	+		[L]: OP-AMP_B					27	VIN1-B
							-
3							+	26
									VIN1+B
4				33k	11k		Signal system	25	S-GND
			Level
				-			power supply
5			shift	+				24
									VIN1-SW
					All outputs ON/OFF
6			Levelshift		H : ON		MUTE	23	MUTE
					L : OFF
7								22	VREFIN
	Power system					Power system GND
FR	GND	-						FR	FR
		+
						Signal system
8			Level			power supply		21	VCCS
					3.3VREG
9			shift					20	3.3VREG
					(External:PTP Tr)
10			Levelshift				+	19	REGIN
							-
11								18	VIN2G
						33k	11k
12						-		17	VIN2
		33k				+
13	11k	-						16	VIN3G
		+				33k	11k
14						-		15	VIN3
						+

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