Alto PS 4LA-SCH Schematic

1	2	3			4
							1
	PS 4LA BLOCK DIAGRAM
D							D
		HI POWER		HI SPEAKER
		AMP
	HPF
	MIX AMP
SIGNAL INPUT	VOLUME
			LOW SPEAKER+
		LOW POWER
		AMP	BRIDGE OUT+
C	LPF						C
		LOW POWER	LOW SPEAKER-
		AMP	BRIDGE OUT-
	PT-4LA-E
B	POWER SWITCH						B
	130 deg SW		V+
AC INPUT
			V-
A			Title	PS 4LA			A
			Size:	Number			Revision
			A3	PS 4LA BLOCK DIAGRAM			VER1.0
			Date:	2004/04/23	Sheet	of:	1/1
			File:	PS 4LA	Drawn By:		Lian Ming Tan
1	2	3			4

D

C

B

A

8

Revision

VER1.0

1/1

Lian Ming Tan

8

of:

By:

Sheet

Drawn

PS 4LA

P-PS4LA-AMP

7

Number

2004/04/28

PS 4LA

7

A3

Title

Size:

Date:

File:

6

OUT+

6

+Vc

-Vc

HI

+Vc

-Vc

+Vc

C15 100u/50V 0.1u

C2 100u/50V

Vc-

C10

C17 100u/50V 0.1u

C4

C6 100u/50V 0.1u

T3

R13

10E

0.01u

C21

C8

C12 100u/50V 0.1u

C1

C5 100u/50V

0.1u

LOW BRIDGE+

C9

C3

0.1u

LOW BRIDGE-

T2

T1

DS1

LAMP 2.1A

V+

1

V+

V+

NC

1

1

2

NC

NC

OUT

5

2

2

3

5

OUT

OUT

V-

R4

3

3

4

V-

R8

C18

V-

R1

V+

4

10P

4

5

10K

R5 C16

V+

V+

NC

560E 10P

+Vc

-Vc

5

5

10K

R2 C13

6

NC

NC

10P

GND

6

27K

6

7

GND

GND

MUTE

7

7

8

MUTE

MUTE

LM3886

-VIN

8

8

9

LM3886

-VIN

LM3886

-VIN

+VIN

9

9

10

+VIN

+VIN

U2

NC

C27

C26

10

150E

R9

10

11

U3

NC

U1

NC

560E

11

11

10K

0.1u

C24

10u/50V

R6

C20

10u/50V

6800u/50V

6800u/50V

C19

4

0E

C11

56P

C14

560P

R7

10K

C7 220u/16V

BU10-04 C28

BR1

4

R10

R14

22K

R3

R12 1k

220K

-Vc

C25

820P

R15

33K

VTL5C4

8V2

470K

1u/275V.0

Z1

R18

C23 220P

D1

Q1

BC327

T6

T8

T7

R17

1K

Vac

GND

Vac

3

3

R11

10K

R16

10K

C22

0.1u

CN-5PX2-F

1 3 5 7 9

CN1

2 4 6 8 10

-Vc

+Vc

2

2

1

1

D

C

B

A