Lexmark Optra Color 40, Руководство по обслуживанию

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General Information
1-3
4092-010
Voltage, Ground, and Continuity Readings
Voltage Readings
All dc voltages must be 5% through -10% of the values to be
considered correct. Unless stated otherwise, all connectors should
be connected normally when a voltage measurement is done.
When a “Line Voltage” measurement is done, the voltage on United
States and Canada machines should be between 100 V ac and 127
V ac. On World Trade machines, the voltage is according to each
country’s specification.
Ground Checks
To check for a correct ground, measure the voltage between the
ground and a known good voltage source. The voltage
measurement must be the same as the source voltage to consider
the ground is correct. Continuity measurements may be used to
check grounds, however, be sure to measure to a known good
ground using the lowest ohms scale and check for zero ohms.
Note: Always unplug the power cord before doing any continuity
measurement.
Continuity Readings
When measuring continuity, be sure no back circuits affect the
measurement. If necessary, unplug connectors to remove any back
circuits. Zero the ohm range on the lowest scale (X1). An open
circuit will read infinity. A circuit with correct continuity will read zero
ohms.