Brother HL-2400C Service Manual page 114

(1) DCN2: IOD1 PCB - Power Supply Unit (22 pins)
Pin No. Signal
1 +5v - 1
3 +5v - 1
5 ACSYNC - N
7 +24V
9 +5v - 1R
11 HON - N
13 +24V - 1
15 +24V - 1
17 +24V - 1
19 PGND
21 PGND
(2) DCN14: IOD1 PCB - High Voltage Unit (18 pins)
Pin No. Signal
1 +24v - 1
3 FUCHK
5 ACVON - N
7 CHVON - N
9 CBVPWM - N
11 DBV(MC)PWM - N
13 DBV(KY)PWM - N
15 FCBVPWM - N
17 NC
(3) DCN3: For Factory Use Only (4 pins)
Pin No. Signal
1 TESTO1
2 TESTI1
3 TESTO2
4 TESTI1
(4) DCN4: IOD1 - Interlock Switch
Pin No. Signal
1 REARDOPEN - P
2 NC
3 TOPDOPEN - P
Pin No. Signal
2 SGND
4 SGND
6 SGND
8 SGND
10 ACOFF - P
12 TESTI2
14 TESTO2
16 TESTI1
18 TESTO1
20 PGND
22 PGND
Pin No. Signal
2 PGND
4 PGND
6 PWMON - N
8 CHVERR
10 THVRON - N
12 THVPWM - N
14 THV - I
16 TH1
18 TH2
IV-65