Eeprom; 1.3.10 Reset Circuit - Brother HL 5030 - B/W Laser Printer Service Manual

1.3.9

EEPROM

The EEPROM is BR24C04 type of two-wire method with a 512 x 8bit configuration.
<HL-5030/5040/5050>
The EEPROM is BR24C64 type of two-wire method with a 8192 x 8bit configuration.
<HL-5070N>

1.3.10 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.)
<HL-5030/5040/5050>
<HL-5070N>
U5
R30
VDD3
4.7k
TP58
203
R32 100
EESCL
TP59
202
R31 100
EESDA
Aurora
Fig. 3-17
R71
U7
VDD3
4.7k
TP58
203
R77 100
EESCL
TP59
202
100
R74
EESDA
Aurora
Fig. 3-18
VDD3
C33
C103
C40 U3
5 2
CD VCC
C103
4
TP310 NC
3 1
0V GND VOUT
R3112N281C
Fig. 3-19
VDD3
C71
C103
U5
C75
2
5
CD VCC
C103
4
TP310 NC
1
3
0V GND VOUT
R3112N281C
Fig. 3-20
3-13
HL-5030/5040/5050/5070N SERVICE MANUAL
C31
C103
VDD3
U2
8 4
VCC VSS
0V
TP67
6 1
SCL A0
TP68
5 2
SDA A1
7 3
TEST A2
BR24C04F
0V
VDD3
U6
8 4
VCC
VSS 0V
TP67
6 1
SCL A0
TP68
5 2
SDA A1
7 3
TEST A2
M24C64-WMN6
0V
C43
TP4
R43
0V
68
C101
C77
TP4
R84
0V
68
C101