Brother HL-2037 User Manual

HL-2030/2040/2070N SERVICE MANUAL
Confidential
3-13
1.3.7 EEPROM
The EEPROM is BR24C04 type of two-wire method with a 512 x 8bit configuration.
< HL-2030/2040 >
C22
C103
VDD3
0V
R25
100
R15
100
R22
4.7k
VDD3
4C
EESCL
0V
4C
EESDA
U2
BR24L04F-WE2
7
TEST
3
A2
2
A1
1
A0
4
VSS
5
SDA
8
VCC
6
SCL
TP20
TP9
TP21
TP38
EEPROM 4kbit
Fig. 3-14
The EEPROM is BR24C64 type of two-wire method with a 4096 x 8bit configuration.
< HL-2070N >
C5
C103
VDD3
0V
R3
100
R1
100
R2
4.7k
VDD3
0V
4D
EESDA
2D
EESDA
TP3
TP2
TP5
TP1
U1
BR24L32F-WE2
7
TEST
3
A2
2
A1
1
A0
4
VSS
5
SDA
8
VCC
6
SCL
U6
MB87S1200
EESCL
129
EESDA
130
EEPROM 32kbit
Fig. 3-15
1.3.8 Reset circuit
The reset IC is a S-B0928ALMP. The reset voltage is 2.8V (typ.) and the low period of reset is
22.4ms (typ.)
< HL-2030/2040 >
U1
S-80928ALMP-DAR
5
CD
2
VCC
1
VOUT
4
NC
3
GND
C20
C101
TP86
0V
C10
C473
10%(B)
R23
1k
TP11
C5
C103
VDD3
0V
TP36
7A/2-1B/2-4E
RSTN
U4
Bellona
RSTN
96
RESET IC
Fig. 3-16
< HL-2070N >
U5
S-80928ALMP-DAR
5
CD
2
VCC
1
VOUT
4
NC
3
GND
C65
C101
TP76
0V
C64
C473
10%(B)
R55
1k
TP69
C56
C103
VDD3
0V
TP77
2-5D/3-1B
RSTN
U6
MB87S1200
RSTN
193
RESET IC
Fig. 3-17

Brother HL-2037 Specifications

General

Brand	Brother
Model	HL-2037
Category	Printer
Language	English