Lexmark X500n Service Manual page 208

7100-XXX
Engine controller board connections
HVCN-21 pin. Connects to HVPS
Pin # Voltage / Signal
1 HVUCNCHK-N
2 PGND
3 ID [PGND]
4 FCBVPWM-N
5 THV-I
6 DBV [KY] PWM-N
7 THVPWM-N
8 DBV [MC] PWM-N
9 THVRON
10 CBVPWM-N
11 BRVERR
LCN-24 Pin. Connects to LSU assembly
Pin # Voltage / Signal
1 +5V - 1R
2 LCONT-1
3 LREADY
4 LCONT2
5 SGND
6 LDREF-4
7 VIDEO-N
8 LDREF-3
9 VIDEO-P
10 LDREF-2
11 SGND
12 LDREF-1
5-10
Service Manual
Pin # Voltage / Signal
12 BRVPWM-N
13 PWMON-N
14 DCVP-N
15 BRVON-N
16 +24V -1D
17 +24V -1D
18 +24V -1D
19 PGND
20 PGND
21 PGND
Pin # Voltage / Signal
13 BDT-P
14 LDREF-0
15 BDT-N
16 VCC
17 SGND
18 SGND
19 SCMRDY-N
20 SCMCLK
21 PGND
22 SCMON-N
23 +24V-1
24 +3.3V