Brother LH4-B800E Service Manual page 146

<Sub circuit board>
P1 [EXP1]
Pin No.
1 +5V
2 +5V
3 +5V
4 +5V
5 +24V
6 +24V
7 +24V
8 +24V
9 Feed PM clock
10 Presser foot PM clock
11 -
12 -
13 Presser foot PM direction signal
14 Feed PM direction signal
15 Presser foot PM current control
signal
16 Feed PM current control signal
17 PM current OFF signal
18 -
19 -
20 -
21 VALV1
22 VALV2
23 VALV3
24 VALV4
25 VALV5
26 VALV6
27 +55V OFF signal
28 +55V relay output signal
29 0V
30 0V
31 0V
32 0V
Signal name Symptoms resulting mainly from poor contact
The zigzag home position, feed home position and presser
foot home position can not be found.
The zigzag mechanism, feed mechanism and presser foot
mechanism do not operate.
One of error E-05, E-06 and E-07 is displayed.
+55 V (power supply for driving the feed mechanism and
work clamp PM) control is not possible
Error E-44 is displayed.
The valve does not operate.
LH4-B800E
6. ELECTRIC MECHANISM
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