Eeprom; Reset Circuit; 1.3.10 Engine I/O; 1.3.11 Panel I/O - Brother mfc8440 Service Manual
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Also See for mfc8440:
- User manual (426 pages) ,
- Software user's manual (183 pages) ,
- Quick setup manual (52 pages)
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1.3.8
EEPROM
The EEPROM is BR24126 type of two-wire method with a 8192 x 8bit configuration.
1.3.9
Reset circuit
The reset IC is a R3112N281C. The reset voltage is 2.8V (typ.) and the LOW period of reset is
22.4ms (typ.)
1.3.10 Engine I/O
The interface with the engine PCB is by full-duplex synchronous serial method, of which
transfer rate is 520kbps.
254
ENGDI
3D
1.3.11 Panel I/O
The interface with the panel PCB is by full-duplex synchronous serial method.
U15
Aurora
Fig. 3-10
U5
C75
5
CD
C103
4
TP310
NC
3
0V
GND
R3112N281C
Fig. 3-11
U7
TP200
253
ENGRSTN
TP201
255
ENGDI
ENGDO
ENGDI
1D
Aurora
Fig. 3-12
Fig. 3-13
MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN
VDD3
C71
C103
2
VCC
C77
TP4
R84
1
VOUT
68
C101
VDD3
TP202
R142
1k
TP203
R138
100
TP204
R141
100
VDD5
0V
3-7
SERVICE MANUAL
0V
VDD3
ENGINE
CN9
L10
0
1
3.3V
L14
0
5
RESET
L12
0
3
TXD
TP205
L13
0
4
RXD
L15
0
6
5V
L11
0
2
0V
B6B-PH-K-S
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