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Brother LH4-B800E Service Manual Page 140

Electronic lockstitch button holer.
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P6 [POWER]
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
P7 [PEDAL]
Pin No.
1
P8V (+8V)
2
PEDAL signal
3
0V
4
N8V (-8V)
P9 [HPEDAL] Standing operation pedal (option)
Pin No.
1
P8V (+8V)
2
FORSW signal
3
BAKSW signal
4
0V
5
INCHSW signal
6
PRSW signal
7
HPEDAL signal
Signal name
Signal name
Signal name
Symptoms resulting mainly from poor contact
The panel power lamp does not light.
The machine motor does not turn.
Symptoms resulting mainly from poor contact
The home position can not be found.
The presser foot does not operate.
The machine does not operate.
One of error E-30, E-31 and E-32 is displayed.
Symptoms resulting mainly from poor contact
The home position can not be found.
The presser foot does not operate.
The machine does not operate.
One of error E-30, E-31 and E-32 is displayed.
LH4-B800E
6. ELECTRIC MECHANISM
6 - 7

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