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4069-XXX
FRU
5
Engine Board HVPS
Connector
2-100
Service Manual
Action
Check the following voltages at J10
on the engine board. Measure the
voltages from J10 to printer ground.
Printer Idle
J10-1 approximately 0 V dc
J10-2 approximately 4 V dc
J10-4 approximately 0 V dc
Printer Printing
J10-1 varies 0 V dc to +5 V dc
J10-2 varies 0 V dc to +4 V dc
J10-4 varies 0 V dc to +1.9 V dc
If J10-1 voltage is incorrect, check
the continuity of the front harness
cable (J10-1 line). If there is no
continuity, replace the harness
cable. If there is continuity, replace
the HVPS. If this does not correct the
problem, replace the engine board.
If J10-2 voltage is incorrect or if the
voltage remains at 0 V dc, check the
continuity of the front harness cable
(J10-2 line). If there is no continuity,
replace the harness cable. If there is
continuity, replace the HVPS. If this
does not correct the problem,
replace the engine board.
If J10-4 voltage is incorrect, check
the front harness cable (J10-3 line).
If there is not continuity, replace the
harness cable. If correct, replace the
engine board. if this does not correct
the problem, replace the HVPS.
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