Brother MFC-9420CN Service Manual page 72

4) Connector Pin Assignment
The connector in the machine to connect to the controller board is type
128A-064S2B-:L14A (DDK) or the equivalent.
<Connector pin assignment for video interface signals and
DC power supply (Engine side)>
Pin No.
1A PSGND
2A PSGND
3A PSGND
4A PSGND
5A PSGND
6A PSGND
7A PSGND
8A PSGND
9A VIDEO-P
10A RET(GND)
11A Reserved
12A ID2-N
13A RET(GND)
14A RET(GND)
15A RET(GND)
16A RET(GND)
17A RET(GND)
18A RET(GND)
19A RET(GND)
20A RET(GND)
21A Reserved
22A RET(GND)
23A Reserved
24A Reserved
25A RET(GND)
26A RET(GND)*
27A RET(GND)
28A RET(GND)*
29A RET(GND)
30A RET(GND)*
31A RET(GND)
32A RET(GND)*
* Pin No. 26A, 28A, 30A and 32A should be connected to the GND at the LPC side.
Signal Name Pin No.
1B
2B
3B
4B
5B
6B
7B
8B
9B
10B
11B
12B
13B
14B
15B
16B
17B
18B
19B
20B
21B
22B
23B
24B
25B
26B
27B
28B
29B
30B
31B
32B
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Signal Name
+5V
+5V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
+3.3V
VIDEO-N
Reserve
HSYNC-N
Reserve
VSYNC-N
Reserve
STATUS
IREADY-N
Reserve
COMMAND
PRREQ-N
Reserve
Reserve
KEY_STATUS-N
Reserve
Reserve
Reserve
Reserve
Reserve
+24V
+24V
Reserve
PGND
PGND
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