Lexmark C720 Service Manual page 128

5024-001
FRU
4 Main Motor (MM)
5 • IOD2 P.W.B. Board
• IOD1 P.W.B. Board
• Main Engine (MCTL
P.W.B.) Board
2-48
Service Manual
Action
Check for +24V between:
MM1-4 and MM1-5.
• ECN12-4 and ECN12-5
• ECN2-5 and ECN2-1
If there is +24V, replace the main motor
(MM).
Check for +5V between:
• MM1-6 and MM1-7
• ECN12-6 and ECN12-7
• ECN2-7 and ECN2-1
If there is +5V, replace the main motor
(MM).
If the problem still exists, replace the
following parts in the following order one
at a time, until the problem is resolved.
• IOD2 P.W.B. board
• IOD1 P.W.B. board
• Main engine (MCTL P.W.B.) board