905-Yellow/Black Developer Solenoid Service Check - Lexmark C720 Service Manual

5024-001
905—Yellow/Black Developer Solenoid Service Check
FRU
1 Check Connector
Check Cable Harness
2 Developer Solenoid
Assembly (PSL KY/
MC)
Front Cover Unit
3 IOD2 P.W.B. Board
4 Main Engine (MCTL
P.W.B.) Board
Developer Solenoid (PSL KY)
2-42
Service Manual
Action
Ensure the black/yellow solenoid
connector ECN5 on the IOD2 P.W.B.
board is connected.
Ensure the cable harness for the solenoid
(PSL KY) is not broken.
Replace any damaged parts.
Check the voltage at (PSL KY) ON-N.
Does the voltage drop below +24V
between ECN5-10 and ECN2-6?
• If the voltage drops below +24V, replace
the DE solenoid assembly.
• If this doesn't fix the problem, replace
the front cover unit.
Check the voltage between ECN1-5 and
ECN2-8.
If the voltage jumps to +24V, replace the
IOD2 P.W.B. board.
If the problem still exists, replace the main
engine (MCTL P.W.B.) board.