Brother FAX-921, MFC-970MC, FAX-931 service manual Main PCB 3/5

A

B

C

D

E

F

1

2

3

4

5

6

7

8

C I

S

R 5 V

+ 5 V

1

+ 2 5 V

+ 5 V

2

R 5 V

+ 2 5 V

S E N S O R

R 7 3 4 7 0

3

R B

1 5 C

R 0 V

G N D

R 8 4

R 8 3

1 0 0 K

1 0 0 K

R 7 4

2 7 0

Q 6

4

4

T G

1 5 C

2 S C 3 9 2 8

L I G T 1 5 C

1 5 B F S E N

2

Q 1

1 5 B

R S E N

3

2 S D 1 8 5 8

5

R 5 V

C 7 3

C 7 2

C 6 9

C C 1 0 1

C C 1 0 1

C C 1 0 4

R 3

1

1 W

6

R 0 V

3 0

G N D

P 1

G N D

B 4 B -

P H

C 4

1 6 V /

1 0

7

V I

D

1 2 E

+ 5 V

P 5

Q 9

B 7 B - P H

K R C 1 0 7 S

R 2 5

W H I

T E

1 / 1 0

D

+ 5 V

1 6 0

G

C L M P

1 5 C

S

R 7 2

R 5 V

R 2 4

P I

2

1 0 0 K

Q 8

R P I

-

4 4 1

2 S K 1 3 9 9

R 5 V

1 5 B

R E A R

R 0 V

R 6 5

2 .

2 K

Q 7

2 S C 3 9 2 8

C P W M

1 5 C

R 6 6

2 2 K

+ 5 V

G N D

C 5 7

R 7 8

R 6 7

C C 1 0 4

P I

1

1 0 0 K

1 0 K

R P I

-

4 4 1

1 5 B

R I B N

R 0 V

R 0 V

G N D

G N D

+ 5 V

+ 5 V

R 8 5

S W 1

T M

4 . 7 K

S P P B 5 1

8

+ 5 V

R 7 7

1 5 B

C S E N

3 3 K F

1 0

C P 3 I

1 2 F

C 7 7

*

R 7 6

1 0 0 K F

G N D

9

G N D

R 7 5

1 0 K F

+ 5 V

R 2 6

H O O K

G N D

4 . 7 K

L 1 3 L 1 0 2 B

7

S T 2

1 5 C

1 2 E

H O O K

1

R 6 9

1 0 0

2

6

D O U T

1 5 C

4

R 6 8

2 0 0

D I N

1 5 C

C 2 0

G N D

*

P 8

2

H D C

1 5 C

B 2 B -

P H

5

S T 1

1 5 C

6

R E D

3 2 F

H R L Y

1

C 6 2

C 6 0

C 6 1

C 5 8

P W O N 1 5 B

G N D

C C 1 0 1

*

C C 1 0 1

C C 1 0 1

4 2 E

C M L L

4

3

G N D

C M L H

1 2 D

3

L A T C

1 5 D

1

H R L Y

3 4 E

2

# 4

U M G 5 N

C 5 9

G N D

P 1 1

C C 1 0 1

B 1 0 B -

P H

G N D

								Main PCB 3/5
						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