Electrical Inspection; Electrical Performance; Frequency Change; Performance Check - NEC LCD1501-BK Service Manual

1. Electrical inspection

1.1 Electrical performance

Function switch check
1) Input 1024×768 (75Hz) pattern "Crosshatch".
2) Image should appeared within 4sec after Switch ON.
3) LED lighting green.
4) It should not appear noise while Switch is turn ON or turn OFF.
5) OSM should be indicated by push [Exit] or [<] OR [>] or [-] or [+] button.
6) While [-] or [+] button is pushed, the value should change smooth and it should not be appeared noise.
7) Check the OSM off when push the [OSM OFF] switch EXIT.

1.2 Frequency change

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

1.3 Performance check

1) Input 1024×768 (75Hz) pattern "RGB 256 GRAY SCAL" PATTERN.
2) Press [AUTO CONTRAST] switch.
3) Check the color gray scal smoth and not data lost.

1.4 Check power manage function

Mode
Normal
Standby
Suspend
Off
Horizontal Vertical
On On
Off On
On Off
Off Off
Power
Input Timing
Supply
240V
1024×768 (75Hz)
240V 1024×768 (75Hz)
240V
1024×768 (75Hz)
240V
1024×768 (75Hz)
5-2
Power
consumption
20W
2W
2W
2W