Signal Names For Connectors And; Contact - Brother HE-800A Service Manual

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.
1 +24V
2 FAN2 signal
3 0V
P3 [SYNC]
Pin no.
1 +5V
2 Encoder signal
3 Needle up stop position signal
4 Needle down stop position signal
5 0V
P4 [PANEL]
Pin no.
1 +5V
2 0V
3 KEY0
4 KEY1
5 KEY2
6 OC
7 A
8 B
9 C
10 D
11 E
12 F
13 G
14 STB
15 P8V
16 SENSOR
17 BUZZER
18 0V
19 0V
20 0V
Signal name
Signal name
Signal name
6. ELECTRIC COMPONENTS AND SOFTWARE
Probable symptoms due to poor contact
• The inside air circulation fan does not operate.
• Error E-41 is displayed.
Probable symptoms due to poor contact
• 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.
Probable symptoms due to poor contact
• The operation panel does not operate.
HE-800A
127