Lexmark W820 Service Manual page 326

BD4 Console↔MCU PWB
The following table shows the signal names for this BD:
Connector/Pin Number
P615 to P/J401 Pin 1
P615 to P/J401 Pin 2
P615 to P/J401 Pin 3
P615 to P/J401 Pin 4
P615 to P/J401 Pin 5
BD5 HVPS↔I/O PWB
5-20
Service Manual
4025-XXX
Signal Name
SDA
+5VDC
SCL
5VRTN
FPIRQ