Brother HE-800A - Signal Names for Connectors and; Contact

6. ELECTRIC COMPONENTS AND SOFTWARE
HE-800A
127
6-4-2. Signal names for connectors and probable symptoms due to poor contact
1. Circuit board connectors [Main circuit board]
P1 [FAN2]
Pin no. Signal name Probable symptoms due to poor contact
1+24V
2 FAN2 signal
30V
• The inside air circulation fan does not operate.
• Error E-41 is displayed.
P3 [SYNC]
Pin no. Signal name Probable symptoms due to poor contact
1+5V
2 Encoder signal
3 Needle up stop position signal
4 Needle down stop position signal
50V
• The machine motor does not turn.
• A machine stopping error occurs.
• One of error E-02, E-62, E-63 and E-64 is displayed.
P4 [PANEL]
Pin no. Signal name Probable symptoms due to poor contact
1+5V
20V
3KEY0
4KEY1
5KEY2
6OC
7A
8B
9C
10 D
11 E
12 F
13 G
14 STB
15 P8V
16 SENSOR
17 BUZZER
18 0V
19 0V
20 0V
• The operation panel does not operate.