Lexmark 2580+, Руководство по обслуживанию

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Diagnostic information
2-1
2580+, 2581+, 2590+, 2591+
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2. Diagnostic information
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Make a quick visual check for defects (loose or broken parts, unplugged connectors, paper jams, and so on).
To determine the corrective action necessary to repair a printer, look for the following information:
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For information regarding error indications, see “Error indication table” on page 2-2 .
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For information regarding electrical connections, see “Connector locations” on page 5-1 .
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 performed.
When a “line voltage” measurement is to be performed, the voltage on United States and Canada printers
should be between 100 V ac and 127 V ac. On World Trade printers, 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 that 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.
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.
CAUTION
Unplug power cord from the electrical outlet before you connect or disconnect any cable or
electronic board or assembly for personal safety and to prevent damage to the printer.
Disconnect any connections between the printer and PCs/peripherals.
CAUTION
Always unplug the power cord before doing any continuity measurement.