Brother HL-4000CN - Page 305

V
I-8
ABCDEFGHJ
1
2
3
4
5
6
2.3 Machine Run Control
Font Card
RAM slot PL16.1
RAM 128MB 50 DIMM
ESS PWB
PL16.1
MCU AND HVPS PWB
PL15.1
CONTROL
LOGIC
2.3.1 Machine self test
P/J 1
EEPROM
(U8)
CONTROL
LOGIC
EEPROM
(U9)
P/J 10
Pararell
P/J 12
USB
P/J 14
HDD ASSY PL16.1
P/J 33
NIC EXP ASSY PL16.1
P/J 34
P/J 45
Ethenet 100Base TX / 10BaseT
1
S1
1
When replacing ESS
PWB,remove EEPROM(U8,U9)
from ESS PWB and install
them on new ESS PWB.
2.3.3
IOT ERROR
J311
1
2
3
4
BRN
VIO
GRY
VIO
P/J 14
2.1.1
2.1.1
2.1.1
2.1.1
+3.3VDC
DC COM
DC COM
+5VDC
+3.3DC
DC COM
DC COM
+5VDC
2.3.3
ESS ERROR
2
2
2
Imaginary Line