Akai LCT2715 Service Manual page 12

KAWA ELECTRONIC RESEARCH & DEVELOPMENT CENTRE
Test Condition
All tests shall be performed under the following conditions unless otherwise specified
1 Picture Modulation
2 Sound Modulation
3 Picture to Sound Ratio
4 Sound Artificial Load
Resistor
Video signal
5
6 Audio signal
7 Other conditions:
A. Switch LCD-TV on and let it warm up for more than 30 minutes.
Viewing distance: 3H (H: Panel High) in front of LCD, about 2M.
Ambient light: ≤0.1 cd/ m
B. Brightness, Contrast, Saturation, Tint, sharpness set at normal.
C. Connect RMS volt meter to speaker terminals and adjust the LCD volume to get 500mW RMS
power at each terminals.
D. With image sticking protection of LCD module. The luminance will descend by time on a same
still screen and rapidly go down in 5 minutes, when measuring the color tracking and luminance
of a same still screen, be sure to accomplish the measurement in one minute to ensure its
accuracy.
E. Due to the structure of LCD module. The extra-high-bright same screen should not hold over 5
minutes for fear of branding on the panel.
F. RF test point: Video output.
8 Note:
*(1) Now this project cannot fit the limited spec. the typical audio input level is 1.0 Vrms,
*(2) The audio out level is controlled by the volume level, the range is from 0 to 0.5Vrms.
87.5%
27KHz Dev. For DK/I/BG
15KHz Dev. For M/N
10dB
8 ohm
Stair and Special
1KHz sine wave 0.5Vrms
2
Reference No : LC27HAB001
Revision : 0
Date : 2005.8.1
Page : P. 8of 8