Brother MFC-970MC, FAX-921 service manual Main PCB 2/6 FAX870MC/MFC970MC/FAX-930 FAX-931

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2

3

4

5

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7

8

A

P S

+ 2 5 V

A

+ 5 V

+ 5 V

G N D

+ 5 V

G N D

5

C 2 8

C 8 0

C C 1 0 4

C C 1 0 4

1

# 1

C 1

C 9 6

R 2 6

+ 5 V

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

1 6 V 4 7

C C 1 0 4

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 1 3 9

1 0 0

R 1 1 7

6

1

R 1 4 1

2 2

1 6 D E P C K

S C L

1 6 B R O M C

- C E

*

G N D

A 0

*

2 4

5

2

1 6 A R M R D

- O E

4

1 6 E E P D O

S D A

A 1

3 1

- P G M

R 1 4 0

1 0 0

7

3

A 0

1 2

T E S T

A 2

R 1 4 2

A 0

P 0 V

A 1

1 1

0

A 1

A 2

1 0

D A 9

A 2

3

1 4 D D A B U S

A 3

9

A 3

# 1 2

A 4

8

B

A 4

B

A 5

7

+ 5 V

A 5

P 3

A 6

6

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

A 6

A 7

5

A 7

Q 1 1 R H 5 R A 4 7

R 1 1 5

A 8

2 7

A 8

*

D A 1

A 9

2 6

A 9

I N

O U T

+ 5 B

1 S S 3 7 8

A 1 0

2 3

A 1 0

B A T

G N D

A 1 1

2 5

A 1 1

1 3

D 0

1 7 D

A B U S

D 0

L 1 3 0

R 1 1 6

D A 3

4

1 4

D 1

A 1 2

1 K

D 1

C 9 4

C 2

D A 4

2 8

1 5

D 2

1

A 1 3

C C 1 0 4

1 6 V 4 7

D 2

D A 5

2 9

1 7

D 3

A 1 4

L 1 4

0

D 3

D A 6

3

1 8

D 4

A 1 5

2

G N D

D 4

D A 7

2

A 1 6

1 9

D 5

D 5

D A 8

3 0

A 1 7

2 0

D 6

D 6

P 2

G N D

2 1

D 7

D 7

B 2 B -

P H

B L A C K

C

C

1 5 A

R A S

M O T O R

1 5 A

C A S

1 6 C

B A R M W E

3

# 6

1 6 C B A R M R D

M T D 2 0 0 2 F

4

+ 5 B

C 9 5

G N D

+ 5 B

C 9 8

G N D

+ 5 B

C 9 7

G N D

M B U S 1 7 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

# 3

O U T 3

N 3

# 2

# 4

1 3

1 6

M M 4

* H M 5 1 4 8 0 0 J P

*

1

O U T 4

I

N 4

*

3

N C

1 3

2 6

1 3

2 6

1

1 5

5

V C C

V S S

V C C

V S S

V C C

V S S

P 4

N C

1 4

2 8

6

2 5

V C C

V S S

N C

I 0

M T I 0 1 2 E

B 6 B -

P H

4

4

8

9

- R A S

- R A S

- R A S

WH I T E

+ 5 V

N C

2 3

2 3

2 3

6

1 0

1 8

M T I 1 1 2 E

- C A S

- C A S

- C A S

N C

D

N C

I 1

3

3

7

2 1

D

1 2

- WE

- WE

- WE

N C

N C

2 2

2 2

2 2

1 9

- O E

- O E

- O E

N C

2 4

R 1 2 3

N C

+ 5 V

+ 2 5 V

D A 0

9

1

D 0

D A 0

9

1

D 4

D A 0

1 0

2

D 0

2 0 K

A 0

D Q 1

D 1

A 0

D Q 1

D 5

A 0

D Q 1

D 1

1

D A 1

1 0

A 1

2

D A 1

1 0

A 1

2

D A 1

1 1

A 1

3

D Q 2

D Q 2

D Q 2

V M M

D A 2

1 1

2 4

D 2

D A 2

1 1

2 4

D 6

D A 2

1 2

4

D 2

2 2

1 4

A 2

A 2

A 2

D Q 3

D Q 3

D Q 3

V R

V M M

D A 3

1 2

2 5

D 3

D A 3

1 2

2 5

D 7

D A 3

1 3

5

D 3

1 5

A 3

A 3

A 3

D Q 4

D Q 4

D Q 4

V C C

D A 4

1 4

D A 4

1 4

D A 4

1 6

2 4

D 4

2 1

2 8

A 4

A 4

A 4

D Q 5

C / R

V C C

D A 5

1 5

D A 5

1 5

D A 5

1 7

2 5

D 5

A 5

A 5

A 5

D Q 6

D 6

C 1 0 7

2 3

D A 6

1 6

A 6

D A 6

1 6

A 6

D A 6

1 8

A 6

2 6

D Q 7

C C 3 3 2 B

V S A

D A 7

1 7

D A 7

1 7

D A 7

1 9

2 7

D 7

4

C 1 0 2

C 1 0 6

C 1 0 8

C 3

A 7

A 7

A 7

D Q 8

R S A

1 8

1 8

2 0

D A 8

D A 8

D A 8

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

A 8

A 8

V S B

G N D

C C 1 0 4

1 0 5 C

D A 9

5

D A 9

5

D A 9

9

1 1

3 0

A 9

A 9

A 9

R S B

G N D

R 3

R 4

P 0 V

1 /

2 W

1 /

2 W

1

1

1 4 D

D A B U S

E

E

1 4 E

D B A S

P 0 V

S O L

+ 2 5 V

1

D 1

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 5

B 2 B -

P H

F

F

B L U E

G N D

Main PCB 2/6

A

(FAX870MC/MFC970MC/FAX-930/

FAX-931)￿

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