Lvps/Hvps Service Check; Main Motor Service Check - Lexmark E120 Service Manual

LVPS/HVPS service check

LVPS/HVPS

Main motor service check

FRU
Main motor
(not a FRU)
Controller card
Warning: Do not
replace the operator
panel and controller
card 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.
LVPS portion of the LVPS/HVPS
Use the voltage meter to verify the appropriate voltage at the printer end of the
power cable. Disconnect the power cable from the printer and the fuser cable
(CN403) and check the following:
• Continuity across the power switch when it is on. Leave the power switch
turned on.
• Continuity from the lower blade of the 110/220 V ac receptacle (designated
"L" on the controller card) to the following:
- Each end of the two fuses
- Pin 1 of the fuser connector (CN403)
If any of these fail, replace the LVPS/HVPS. See
page 4-19.
Disconnect the cable from the controller card (CN402) and the fan (CN404).
Reconnect the fuser, turn the power switch off and reconnect the power cord into
the printer. Turn the printer on and verify the following:
• +24 V dc at pins 12, 13, 14, 15, 16, and 18 on CN402 (pins 12, 13, 14, 15,
and 16 are interconnected)
• +24 V dc at pin 1 on CN404
Turn the printer off and verify grounds on pins 2, 4, 6, 8, and 17 of CN402. If any
of these voltages or grounds fail, replace the LVPS/HVPS. See
removal" on page 4-19.
HVPS portion of the LVPS/HVPS
Remove the LVPS/HVPS to inspect the HVPS contacts. Clean the contacts,
both springs and pads, if necessary.
Note: The voltage for the transfer roll is created on the transfer card and input
"Transfer roll service check" on page
sensor assembly. See
Action
Turn off the printer, and unplug the main motor cable at J4. Turn on the printer,
and check for +5 V dc on pins 1, 2, 3, 4, and 6. Pin 5 should be grounded:
J4 pins
Pins 1, 2, 3, 4, and 6
Pin 5
• If these voltages are correct, call the next level of support.
• If these voltages are not correct, see
replace the controller card. See
Note: The main motor is not a service part.
"LVPS/HVPS removal" on
Voltages
Approx. +5 V dc
Ground
"LVPS/HVPS card" on page
"Controller card removal" on page
Diagnostic information
4506-1xx
"LVPS/HVPS
2-41.
5-4, or
4-17.
2-29