LVPS/HVPS Service Check
FRU Action
LVPS/HVPS
LVPS portion of board
Fuses that open typically indicate a faulty LVPS/HVPS.
Disconnect the power cable, and open the LVPS/HVPS enough to
test the switch. The switch will show continuity across the conductors
with a meter when the switch is on. If the switch is good, then see
“Dead Machine Service Check” in “Troubleshooting” for more
diagnostics.
HVPS portion of board
Problems with the HVPS are exhibited in the print quality. See “Print
Quality Service Checks” in “Troubleshooting” for more information.
Main Motor Service Check
FRU Action
Main motor gear drive
Main motor cable
LVPS/HVPS
Engine board
WARNING:
Do not replace the engine
board and controller board at
the same time. Each board
contains the machine settings.
When either of these boards is
new, it obtains the settings from
the other board. Settings are
lost when both are new and
replaced at the same time.
Turn off the machine, and unplug the main motor cable at J17 on
the engine board. Turn on the machine, and check for the following
voltages at J17:
1-4, 6 (Pins): Approx.5Vdc
7-9 (Pins): 18Vdc-24Vdc
Verify ground at pin 5 for both the card and cable.
•
If these voltages are correct, then check the main motor cable
for continuity.
-Remove the left side cover to access the connector on the
motor.
-If continuity exists on each wire, then replace the main motor
gear drive which includes the motor.
-If continuity does not exist on one or more of the wires, then
call the next level of support.
•
If these voltages are not correct, then see “Controller and
Engine Board Connector Pin Values” in “Product
Information”, or replace the engine board. See “Engine
Board Removal” in “Replacement and Adjustment”.
6. Troubleshooting
242
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