Main Pcb; Cpu; Usb - Brother DCP 8040 - B/W Laser - All-in-One Service Manual

1.3

Main PCB

For the entire circuit diagram of the main PCB, see
DIAGRAM' in this manual.
1.3.1

CPU

A Fujitsu 32bit RISC CPU, SPARClite is built in the ASIC. While the CPU is driven with a clock
frequency of 66.66 MHz in the user logic block, it itself runs at 133.33 MHz, which is generated
by multiplying the source clock by two.
DATA[0]
DATA[1]
DATA[2]
DATA[3]
DATA[4]
DATA[5]
DATA[6]
DATA[7]
DATA[8]
DATA[9]
DATA[10]
DATA[11]
DATA[12]
DATA[13]
DATA[14]
DATA[15]
DATA[15-0]
6F/8F/3-6A
@C88
C270
AT-49 66.6666MHZ
@X3
@C91
0V
C2P
TP1000
C159
0V
C103
R88
VDD3
R87
The functions of the interface block communication with external devices are described below;
1.3.2

USB

Stores the data received from the PC into DRAM as controlled by the DMA controller. The
transmission speed is 480Mbps or 12Mbps.
U7
TP6
TP728
40
RA11 0
DATA00
1 8
41
DATA01
2 7
42
DATA02
3 6
43
DATA03
TP729 4 5 TP7
44
0
RA12
DATA04
1 8
45
DATA05
2 7
46
DATA06
3 6
47
DATA07
4 5 TP8
TP730
48
RA14 0
DATA08
1 8
49
DATA09
2 7
53
DATA10
3 6
54
DATA11
4 5
TP731 TP9
55
RA13 0
DATA12
1 8
56
DATA13
2 7
57
DATA14
3 6
58
DATA15
5
4
59
DATA16/IO
60
DATA17/IO
61
DATA18/IO
62
DATA19/IO
63
DATA20/IO
64
DATA21/IO
67
DATA22/IO
68
DATA23/IO
69
DATA24/IO
70
DATA25/IO
71
DATA26/IO
72
DATA27/IO
73
DATA28/IO
74
DATA29/IO
75
0V DATA30/IO
76
TP739 DATA31/IO
196
EXINTN0
VDD3
C77
TP5
216
0V RSTN
C101
TP705
@R100 @R103 87
SCKOUT
1
0 0
@R107 85
2
SCKIN
0
@U8
L23
1 5 Aurora
XIN SSCLK
0.68uH
8
XOUT
6 7
TP195 FRSEL VDD
VDD3
3
TP2
0
S1
4
TP3
0 2
S0 VSS 0V
@C83
CY25814 C103
U15
Aurora
MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN
APPENDIX 4.1 to 4.7 'MAIN PCB CIRCUIT
TP198
TP35
9
R124 33
ADR01/24
10
RA7 0
4 5
ADR02
11
3 6
ADR03
12
2 7
ADR04
TP36
13
1 8
ADR05
14
RA8 0
4 5
ADR06
15
3 6
ADR07
16
2 7
ADR08
TP37
17
1 8
ADR09
18
RA9 0
4
ADR10 5
19
3
ADR11 6
25
2
ADR12 7
TP723
26
ADR13 1 8
27
0
RA10
ADR14 4 5
28
ADR15/BA0 3 6
29
ADR16/BA1 2 7
TP724
30
ADR17/RASN 1 8
TP740
31
R129 0
ADR18/CASN
TP741
32
R130 0
ADR19/WEN
TP742
33
R125 0
ADR20/DQM0
TP725
34
R126
33
ADR21/DQM1
TP726
35
R127
33
ADR22/DQM2
TP727
36
R128
33
ADR23/DQM3
TP10
TP700
211 R92
33
ROMCSN0 ROMCSN0
TP11
TP701
212 @R95 33 6D/7D
ROMCSN1 ROMCSN1
4-7D
TP12
TP702
213 R89
33
IOWEN IOWEN
TP13 TP703
214 R91 6D/4-7D
33
IORDN IORDN
6D/7D/4-7D
TP14 TP196
95 R81
51
SDCLK0 SDCLK0
TP15
94 R85 7B
0
SDCLK1 SDCLK1
TP16
93 R90 3-3C
0
SDCLK2 SDCLK2
3-3C
TP17 TP722
96 R75
51
SDCKE0
TP26
97 R78
0
SDCKE1
R79
TP197
R76
TP29
R67
90
51
SDCSN0 SDCSN0
TP30
7A
89 R58
33
SDCSN1 SDCSN1
TP31
3-2D
88 R70
33
SDCSN2 SDCSN2
R73
3-2D
4.7k
TP32
92 R72
33
SDSDA
TP33
91 R68
33
SDSCL
Fig. 3-3
Fig. 3-4
3-3
VDD3
ADR[1]
ADR[2]
ADR[3]
ADR[4]
ADR[5]
ADR[6]
ADR[7]
ADR[8]
ADR[9]
ADR[10]
ADR[11]
ADR[12]
ADR[13]
ADR[14]
ADR[15]
ADR[16]
ADR[17]
ADR[18]
ADR[19]
ADR[20]
ADR[21]
ADR[22]
ADR[23]
SDCKE0
7B
SDCKE1
4.7k 3-3C
4.7k
0V
VDD3
SDSDA
3-2C
SDSCL
3-2C
SERVICE MANUAL
ADR[23-1]
5F/6C/7F/3-2E/
3-3D/4-6E/3-3C/
7A/7B/3-2D