Main Fan Service Check - Lexmark Optra C710 Service Manual

5016-001

Main Fan Service Check

FRU
1 Main Fan Cable
2 Main Fan
Engine Board
Cable (CRF)
Engine Board
2-62
Service Manual
Action
Be sure the fan cable in-line connector is
connected properly to the CRF cable from the
engine board.
Manually spin the fan and verify it rotates freely.
• If incorrect, replace the engine board (CRF)
to fan cable.
• If the fan turns freely, turn the printer off and
check the voltages below from the fan
connector to the printer board cable (CRF),
as you turn the printer on.
Fan cable connector:
• Pin 1 (Green)
0 V dc (running and not running)
• Pin 2 (Yellow)
0 V dc (fan not running) +5 V dc (fan running)
• Pin 3 (Red)
0 V dc (fan not running) +24 V dc (fan
running)
If any of the voltages are incorrect, disconnect
the fan cable from the engine board cable and
check the voltages on the engine board cable
connector.
• If correct, replace the main fan.
• If incorrect, check the engine board cable
(CRF).
• If incorrect, replace the cable.
• If correct, replace the engine board.