Electrical Inspection; Function Switch Check; Frequency Change; Performance Check - NEC AccuSync LCD51VM Series Service Manual

3. Electrical Inspection

3.1 Function switch check

1. Input VESA 1024X768 (75Hz) pattern "Crosshatch".
2. Image should appear within 4 seconds after Switch ON.
3. LED is green.
4. On-screen noise should not appear while the Switch is turned ON or OFF.
5. OSM should be displayes by pushing the "Select" button.
6. Brightness short cut OSM should be indicated by push "-" button.
7. Contrast short cut OSM should be indicated by push "+" button.
8. Audio Volume short cut OSM should be indicated by push "+" button.
9. Auto Adjust short cut should be indicated by push "Auto/Reset" button.
10. While "-" or "+" button is pushed, the value should change smoothly and on-screen should not appear.
11. Check the OSM off when push the "Select" switch with "EXIT" icon highlighted.

3.2 Frequency change

1. Change the preset timing.
2. Check the picture and the time when freq. change (less 5 sec)

3.3 Performance Check

1. Input VESA 1024X768 (75Hz) pattern "RGB 256 GRAY SCALE" PATTERN.
2. Press "Select" button.
3. Press "-" or "+" and select AUTO CONTRAST menu.
4. Press "Select" button, and proceed Auto contrast function.
5. Check the color gray scale smooth and that data is not lost.

3.4 Check Power Manage Function

Monitor should enter to power saving mode if the following condition occurs.
Mode Horizontal
On ON
Stand-by OFF
Suspend ON
Off OFF
Vertical Power Supply
ON 240Vac
ON 240Vac
OFF 240Vac
OFF 240Vac
Input Timing
VESA 1024X768 (75Hz)
VESA 1024X768 (75Hz)
VESA 1024X768 (75Hz)
VESA 1024X768 (75Hz)
5-11
Power Consumption
30W
3W
3W
3W