Lexmark 5021-0XX - Manual (Page 149)

Diagnostic information 2-71
5021-0XX
4 Reconnect DCN5 and
disconnect cable from
DCN13. On cable, check
for 5 VDC from pin 11 to
ground (you can touch
negative lead of voltmeter
to metal bracket that holds
I/O board to obtain ground.)
Is voltage present and
correct? LVPS is
providing 5 VDC
to I/O board.
Replace faulty
I/O board. See
“I/O board
removal” on
page 4-70
.
Replace LVPS.
See
“Low
voltage power
supply (LVPS)
with cage
removal” on
page 4-60
.
Step Questions / actions Yes No