Brother LH4-B800E Service Manual page 151

6. ELECTRIC MECHANISM
<1-step power supply circuit board>
CN1
Pin No.
1 P8V (+8V)
2 0V
3 N8V (-8V)
4 OV. det
5 RY. out
6 OV. FAULT
7 +5V
8 PHOTO
9 U
10 V
11 W
12 U
13 V
14 W
15 IPM. FAULT
CN2
Pin No.
1 AC200-R
2 AC200-T
3 -
4 -
CN3
Pin No.
1 AC220-R
2 -
3 AC220-T
4 -
CN4
Pin No.
1 AC230/240-R
2 -
3 -
4 AC230/240-T
6 - 18
Signal name
Signal name
Signal name
Signal name
Symptoms resulting mainly from poor contact
The zigzag home position can not be found.
The zigzag mechanism does not operate.
Error E-05 is displayed.
The machine motor does not turn.
Symptoms resulting mainly from poor contact
The zigzag home position can not be found.
The zigzag mechanism does not operate.
Error E-05 is displayed.
The tension release solenoid does not operate.
Symptoms resulting mainly from poor contact
The zigzag home position can not be found.
The zigzag mechanism does not operate.
Error E-05 is displayed.
The tension release solenoid does not operate.
Symptoms resulting mainly from poor contact
The zigzag home position can not be found.
The zigzag mechanism does not operate.
Error E-05 is displayed.
The tension release solenoid does not operate.
LH4-B800E