Brother FAX-931, MFC-970MC, FAX-921 service manual Main PCB 2/5

A

B

C

D

E

F

1

2

3

4

5

6

7

8

P S

+ 2 5 V

+ 5 V

+ 5 V

G N D

+ 5 V

G N D

5

C 2 4

C 6 3

C C 1 0 4

C C 1 0 4

1

# 1

C 1

C 7 6

R 3 6

P D 2 7 C 2 0 0 1 B - 1 5

1 6 V 4 7

*

4 . 7 k

1

G N D 1 6

2

8

4

V P P

V C C

V S S

3 2

V C C

R 6

1 0 0

R 8 6

6

1

2 2

1 5 B E P C K

1 5 A R O M C

- C E

*

G N D

S C L

A 0

2 4

5

2

1 5 A R M R D

- O E

4

1 5 B E P D O

S D A

A 1

R 4 3

1 0 0

7

3

A 0

1 2

A 0

T E S T

A 2

P 0 V

A 1

1 1

A 1

A 2

1 0

A 2

3

A 3

9

A 3

# 8

A 4

8

A 4

A 5

7

A 5

P 2

A 6

6

A 6

I M S A - 9 1 1 0 S - 0 5 L

A 7

5

A 7

A 8

2 7

A 8

A 9

2 6

A 9

A 1 0

2 3

A 1 0

A 1 1

2 5

A 1 1

1 3

D 0

D 0

A 1 2

4

A 1 2

1 4

D 1

D 1

A 1 3

2 8

A 1 3

1 5

D 2

D 2

A 1 4

2 9

A 1 4

1 7

D 3

D 3

A 1 5

3

A 1 5

1 8

D 4

D 4

A 1 6

2

A 1 6

1 9

D 5

D 5

A 1 7

3 0

A 1 7

2 0

D 6

D 6

A 1 8

3 1

P G M

2 1

D 7

D 7

M O T O R

3

# 3

M T D 2 0 0 2 F

4

+ 5 V

C 6 6

G N D

M B U S 1 6 B

2

2 7

M M 1

C C 1 0 4

2

O U T 1

I

N 1

6

7

I

2 6

M M 3

O U T 2

N 2

5

8

I

1 7

M M 2

O U T 3

N 3

# 2

1 3

1 6

M M 4

1

H M 5 1 4 8 0 0 J P

O U T 4

I N 4

3

N C

1

1 5

5

V C C

V S S

P 3

N C

1 4

2 8

6

I

2 5

M T I 0

V C C

V S S

B 6 B -

P H

N C

0

8

WH I T E

+ 5 V

9

1 5 A

R A S

- R A S

N C

2 3

6

1 0

1 8

M T I 1

I

1 5 A

C A S

- C A S

N C

N C

1

7

2 1

1 2

1 5 A R M W E

- WE

N C

N C

2 2

1 9

1 5 A R M R D

- O E

N C

2 4

R 8 2

N C

+ 5 V

+ 2 5 V

A 0

1 0

2

D 0

2 0 K

A 0

D Q 1

D 1

1

A 1

1 1

3

A 1

D Q 2

V M M

A 2

1 2

4

D 2

2 2

1 4

A 2

D Q 3

V R

V M M

A 3

1 3

5

D 3

1 5

A 3

D Q 4

V C C

A 4

1 6

2 4

D 4

2 1

2 8

A 4

D Q 5

C / R

V C C

A 5

1 7

2 5

D 5

A 5

D Q 6

D 6

C 7 1

2 3

A 6

1 8

2 6

A 6

D Q 7

C C 3 3 2 B

V S A

A 7

1 9

2 7

D 7

4

C 7 0

C 7 4

C 7 5

C 2

A 7

D Q 8

R S A

A 8

2 0

2 0

2 9

C C 1 0 4

C C 1 0 4

5 0 v

3 5 V / 2 2 0

A 8

V S B

G N D

C C 1 0 4

1 0 5 C

A 9

9

1 1

3 0

A 9

R S B

G N D

R 2

R 1

P 0 V

1 /

2 W

1 /

2 W

1

1

1 6 D

A B A S

1 6 C

D B A S

P 0 V

S O L

+ 2 5 V

1

D 2

Q 1 0

D T D 1 1 3 Z K

1 S S 1 2 0

2

S O L

1 6 D

P 4

B 2 B -

P H

B L U E

G N D

								Main PCB 2/5
						A		(FAX750/FAX770/FAX-910/
								FAX-920/FAX-921/MFC-925)￿
1	2	3	4	5	6		7
									8

A

B

C

D

E

F