Low Voltage Power Supply (Lvps) Service Check - Lexmark X422 Laser MFP Service Manual

7001–001

Low voltage power supply (LVPS) service check

FRU
Low voltage power supply card
(LVPS) (110 V and 220 V)
2-24
Service Manual
Action
Unplug the power cord and verify
that the cable is correct and
functioning. Replace if necessary.
With the power cord unplugged,
disconnect the 12–pin and 4–pin
connectors from the LVPS.
• On the 12–pin connector (pin 1 is
closest to the HVPS), verify pins
1, 2, 7, 8, and 9 are ground.
Re–plug the power cord and turn the
MFP on.
CAUTION: Be careful to not
ground pins to cage while
testing.
• Verify pins 5 and 6 are +5 V dc.
• Verify pins 10, 11 and 12 are
+24 V dc.
• Verify pin 1 of the 4–pin connector
(also closest to the HVPS) is
+5 V dc.
If any one of these are incorrect,
replace the LVPS.