Lexmark C734dn Service Manual page 161

Step Questions / actions
Place a voltmeter between FUSER1 pin 3 and
4
ground (pin 6).
Does the meter read +5 V dc?
1. Replace the fuser.
5
2. Bring the printer up in Diagnostics Menu
(turn off the printer, press and hold
. and turn on the printer).
3. Select SENSOR TESTS, and press
Select ( ).
4. Select Dynamic Sensors, and press
Select ( ).
5. Select Bubble, and press Select (
6. Open the front door.
7. Activate the bubble sensor.
Did the bubble sensor change from Open to
Closed?
Pin 3 Pin 6 (ground)
and
).
Yes
Go to step 6.
Problem resolved.
5026
No
Go to step 5.
Replace the system board.
See
"System board
removal" on page 4-153.
Diagnostic information
2-125
Previous
Next
Go Back