Setting Before Shipment; Safety Test; Input Current Measurements - NEC MultiSync LCD1550ME Service Manual

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 INPUT. Operate the OSM to enter the service mode, and display a
service menu.
2) Adjust the cursor to [FACTORY PRESET] by the use of the(3) LEFT or (4) RIGHT keys, and press the
(+) PLUS, (-) MINUS 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.

1.7. Safety test

• Destination
• Applicable standards
• Unit class
• Ratings

1.7.1. Input current measurements

Under the measuring conditions specified below, an input current shall be measured while the 50Hz input
voltage is maintained at 220V AC (+0 to -5V). The input currents measured shall 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
•
Measuring conditions
(2) Judgment standard
•
The input current shall be kept below 0.7A +10%.
Service menu
: All over the world
: UL1950/C-UL/EN60950
: Class I units (the units protected against electric shocks by protective
earthing, or those equipped with 3-core power cords)
: AC100-120/220-240V 50/60Hz 0.7 / 0.35A
: ON mode
: The inspection signal is set at "17" and "white" is displayed throughout
the screen.
At that time, the brightness and contrast shall be kept under the
brightest condition.
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