Brother MFC-970MC, FAX-921 service manual Main PCB 5/6 FAX870MC/MFC970MC/FAX-930 FAX-931

A

B

1 2 3 4 5 6 7 8

P C I

+ 5 V

L 3 L 1 0 2 B

1

L 6 L 1 0 2 B

C K S

6

L 4 L 1 0 2 B

T X D

3

L 5 L 1 0 2 B

R X D

5

L 7 L 1 0 2 B

C T S

7

L 8 L 1 0 2 B

A

B

C R X D

1 7 B P B U S

8

2

4

C

D

E

F

P A N E L

7

8

P 1 3 2 / 2

+ 5 V			C 3 2
			R 2 9
R 3 6	C 3 4	R 3 0
	C C 2 7 3 B	4 . 7 K
2 . 2 K
			2
			-
			3
			+
C X 1			R 2 8
C C 1 0 4		C 3 1
			0
		*

M O V H R E F

G N D

P 7

B 8 B - P H

W H I T E

R 2 1

7 5 K

C 2 4

C C 2 2 1

# 1 7

R 1 7

T C 3 5 1 3 3 F

6

R 1 8 5 6 K

5 6 K

6

D M K

T B U S 1 4 D

3

7

-

T X O U T

D P D M C K

4 4 D H F R L

5

C 1 9

D P D M D T

7

A D M D

+

A P D M C K

9

A M K

R 2 0

# 1 8

C C 1 0 2 B

4 . 7 K

B A 1 0 3 5 8 F

A P D M D T

1 0

A A M D

H R E F

1 1

C 0

C 3

H R E F

C 4

1 2

C 1

M 0 V

C 5

1 3

C 2

6 8 1 B

5

A M U T

M U T E

- P D

8

R S T L

1 4 A

2 0 0 K

V D D

1

+ 5 V

C 3 0

C C 1 0 4

1

1 5

R X I

N A

C 2 3

# 1 8

R 2 7

R 2 5

C 2 7

C C 1 0 4

4 . 7 K

1 0 0 K

B A 1 0 3 5 8 F

C C 2 2 1

1 6

R X I

N B

V S S

4

C 1 0

2

V B I

A S

V S S

1 4

M O V

1 6 V 1 0

C 1 8

M O V

C C 1 0 4

H R E F

M 0 V

+ 5 V

8

# 1 8

C 2 9

B A 1 0 3 5 8 F

C C 1 0 4

4

M 0 V

C

D

E

F

								Main PCB 5/6
						A		(FAX870MC/MFC970MC/FAX-930/
								FAX-931)
1	2	3	4	5	6		7		8