Akai CT-S21MTD-E3 Service Manual download pdf (Page 11)

KAWA ELECTRONIC RESEARCH & DEVELOPMENT CENTRE

Date : 2005.8.1

Page : P. 8of 8

Test Condition

All tests shall be performed under the following conditions unless otherwise specified

1 Picture Modulation 87.5%

2 Sound Modulation

27KHz Dev. For DK/I/BG

15KHz Dev. For M/N

3 Picture to Sound Ratio 10dB

4 Sound Artificial Load

Resistor

8 ohm

Video signal

Stair and Special

6 Audio signal 1KHz sine wave 0.5Vrms

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.

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Akai CT-S21MTD-E3 Service Manual Page 11