Controller Board Service Check - Lexmark MX310 Series Service Manual

Action
Step 5
Check the voltages on the LVPS card.
•
+5V at pins 17 and 19
•
+24V at pins 11, 13 and 15
Are the voltages correct?

Controller board service check

Service checks which involve measuring voltages on the LVPS/HVPS (low voltage power supply/high voltage power
supply) board should be performed with the printer positioned on its back side.
Note: When making voltage readings, always use frame ground unless another ground is specified. See the wiring
diagram in the back of the book for more information.
Warning—Potential Damage: Do not replace the operator panel and controller board at the same time. Each card
contains the printer settings. When either of these cards is new, it obtains some of the settings from the other card.
Settings are lost when both are new and replaced at the same time.
Action
Step 1
POR the machine.
Did the control panel , fuser, fan and drive motor function at startup?
Step 2
Run some print jobs.
Did any errors occur?
Step 3
Check the cables on the controller board.
Are they connected properly?
Step 4
Properly connect all the cables on the controller board.
Did this fix the issue?
Step 5
Check the power coming to the controller from the power supply. Verify
the following voltages:
•
+5V at pins 17 and 19
•
GND at pins 18, 20
•
+24V at pins 11, 13 and 15
Are the voltages correct?
Yes
Go to the controller
board service check. Go
to
service check" on
page
Yes
Go to step 2.
There is no issue.
Go to step 5.
The problem is solved. Go to step 5.
Go to step 7.
Diagnostic information
115
No
Replace the LVPS. Go to
"Power supply
"Controller board removal" on page
272.
115.
No
Go to step 3.
Go to step 3.
Go to step 4.
Go to step 6.
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