NEC LCD2080UX - MultiSync - 20.1" LCD Monitor, Руководство по обслуживанию

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1.6 Setting before Shipment
In order to recover the initial conditions of all settings, the contents of the memory are reset before shipment.
This reset process involves actions in regard to the memory of signal modes. Therefore, these actions
should be taken after the completion of all electrical inspection and display inspection.
1) Enter an input of Signal 4 through INPUT1. Operate the OSM to enter the factory mode, and display a
service menu.
2) Adjust the cursor to [SERVICE RESET] by the use of the
3
and
4
keys, and press the (+) or (-) keys.
3) When the OSM is displayed again, the resetting process has been finished. Press the EXIT key to
withdraw from the service mode.
Note 1: After the completion of this process, confirm, without fail, that the present condition is surely after
the withdrawal from the service mode (factory mode). This setting is also available under the
condition that the factory mode is assumed. In this case, however, it must be borne in mind that
the EXIT key need be pressed two more times at the time of completion.
1.7 Safety Test
•
Destination : All over the world
•
Applicable standards : UL60950/C-UL/EN60950
•
Unit class : Class I units (the units protected against electric shocks by protective
earthing,
or those equipped with 3-core power cords)
•
Ratings : AC100 - 240V 50/60Hz 0.7A - 0.35A
1.7.1 Input Current Measurements
Under the measuring conditions specified below, an input current should be measured while the 50Hz input
voltage is maintained at 230V AC (+0 to -5V). The input currents measured should be confirm so they
satisfy the judgment standard. (The rear rating plates are the same as those for North America and Europe.
Therefore, measurements should also be based on this setting.)
(1) Measuring conditions
•
Condition of the set : ON mode
•
Measuring conditions : The inspection signal is set at “28” and “white” is displayed throughout the screen.
At that time, brightness is used to MAX and contrast is used as a center.
(2) Judgment standard
•
The input current should be kept below 0.385A (0.35A +10%).
1.7.2 Power Source/Earth Connections
a. Checks on the power source/earth connections
The earth side of the cord or the earth wire of the inlet filter for the cord set should be visually checked to
see that it is connected to the chassis block of the unit as specified below.
1) The earth wire color should be spiral of green and yellow.
[Units applicable to UL60950 or IEC60950 (EN60950)]
2) The earth wire should be firmly connected to the chassis block by the use of a screw (See Note) of
3.5mm
∅
in diameter.
Note: Spring washers or star washers should be used, without fail.