918-Erase Lamp Service Check - Lexmark C720 Service Manual

5024-001
918—Erase Lamp Service Check
FRU
1 Check Connector
2 Erase Lamp (LED
P.W.B.)
3 • IOD1 P.W.B. Board
• Main Engine (MCTL
P.W.B.) Board
Erase Lamp EL
Action
Ensure the erase lamp connector is
properly connected to DCN7 on the IOD1
board.
Ensure DCN1 on the IOD1 board and
11CN on the main engine (MCTL P.W.B.)
board are connected.
Check for voltage between DCN7-11 and
DCN2-25 on the IOD1 board.
• If the voltage drops to less than +24V,
replace the erase lamp (LED P.W.B.).
Check for voltage between DCN1-27 and
DCN1-44 on the IOD2 P.W.B. board.
• If the voltage jumps to +24V, replace the
IOD1 P.W.B. board.
If the problem still exists, replace the main
engine (MCTL P.W.B.) board.
Diagnostic Information
2-53