Brother service manual FAX-8650P/MFC7750

1

2

3

4

5

6

A

B

C

					+ 5 V
	P 1			R 1 0 R 9			R 1 1 R 1 6 R 1 5 R 1 3					R 1 2
				4 7 K 4 7 K			4 7 K 4 7 K 4 7 K 4 7 K					4 7 K
5 2 0 8 9 - 1 5 2 0
		K I	0
	1 4
		K I	1
	1 2
		K I	2
	1 0
		K I	3
	8
		K I	4
	6
		K I	5
	4
		K I	6
	2
	P 3							P 4
5 3 0 2 5 - 0 6 1 0							5 3 0 2 5 - 0 8 1 0
										+ 5 V					C 1
			4						4
														1 0 0
										S G N D
			5						5
										S D O U T			R 2 4 1 0 0
			3						3
										S D I N
			2						2
										P C L K			R 2 3 4 7 0
			1						1
										R S E N
			6						6
										M I	C +
									7
									8	M I	C -
										P 5
						S 2 B - P H -			K		2
								M I	C		1

				+ 5 V
				R 1 9
				1 0 0 K
C C 1 0 2 X 7				C 1 3
				C C 1 0 4
		S G N D
				S G N D
					2 6
					4
					5
					6
					7
					8
					9
					1 0
				+ 5 D	1 1
		+ 5 V			2 5
				F S E N
		R 2 2		S G N D	2 7
	R 2 0
S G N D
					2 3
R 2 1					2 2
4 7 0					2 1
			S G N D		2 4
)	)
(	(
		+ 5 D			3 9
				C 1 1	1 7
				C C 1 0 4
					4 0
	S G N D

	# 1
L P D 6 5 6 1 2 G B
R S T		R S	3 8
			3 7
		R W
			3 6
		E
			3 5
K I	0	L C D 0
			3 4
K I	1	L C D 1
			3 3
K I	2	L C D 2
			3 2
K I	3	L C D 3
			3 1
K I	4	L C D 4
			3 0
K I	5	L C D 5
			2 9
K I	6	L C D 6
K I	7	L C D 7	2 8
P I	N 0	K O 0	1 2
			1 3
P I	N 1	K O 1
			1 4
		K O 2
			1 5
		K O 3
			1 6
S D I N		K O 4
			1 8
S D O U T		K O 5
			1 9
P C L K		K O 6
			2 0
T S T H		K O 7
		P O 6	4 1
			4 2
		P O 5
			4 3
		P O 4
			4 4
V D D		P O 3
			1
		P O 2
			2
G N D		P O 1
			3
G N D		P O 0

R 1 8		S G N D
	R 1 7
	0
			V S S
+ 5 D			V D D
			V O
			R S
			R / W	P 2
			E	5 2 0 8 9 - 1 4 2 0
			D B 0
			D B 1	C O G
			D B 2
			D B 3
			D B 4
			D B 5
			D B 6
			D B 7
			K O 0
			1
			K O 1
			3
			K O 2	P 1
			5
			K O 3	5 2 0 8 9 - 1 5 2 0
			7
			K O 4
			9
			K O 5
			1 1
			K O 6
			1 3
			K O 7
			1 5
C C 1 0 2 X 8 C 2
			F P C
C 4	C 1 4	C 1 6	C 1 9
C 1 2	C 1 5	C 1 8	S G N D
2			L E D 1	R 2
	S L R - 3 4 M G 8 0 F			6 2 0
3			L E D 2	R 1
	S L R - 3 4 M G 8 0 F			6 2 0
				F O R M C M O D E L
	L E D 3		R 5	+ 5 V
S L R - 3 4 M G 8 0 F
			6 2 0

1

+ 5 V

O N L Y

A

B

C

D

	R 2 5		R S E N	2
+ 5 V	+ 5 D	+ 5 V
			R 4 1 6 0
1 /	8 W 0			1
	C 2 3				1	3
	C C 4 7 5		+ 5 V
					A	C
		c 2 5	R 3		K	E
		C C 1 0 4	1 0 0 K
	S G N D				2	4
			F S E N	4
		F S E N
				3	1	3
				S G N D
					A	C
		S G N D			K	E
					2	4

P H 1

S G - 2 6 7 ( R E A R )

S G N D

P H 2

S G - 2 6 7 ( F R O N T )

S G N D

L E D 4	R 6
S L R - 3 4 M G 8 0 F	6 2 0
L E D 5	R 7
S L R - 3 4 M G 8 0 F	6 2 0
L E D 6	R 8
S L R - 3 4 M G 8 0 F	6 2 0
L E D 7	R 1 4
S L R - 3 4 2 V R	6 2 0

D

					D	Control Panel 1/2
						(FAX-8650P/MFC7750)￿
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