Alcad 912-MS Serie Manual De Instalación Y Programación página 33

32 - ENG
A. The screen is black or with snow.
C. No video signal reaches the modulator.
S. Make sure that the video source is properly connected.
A. Image is seen but is not heard.
C. No signal reaches the audio of the modulator.
S. Verify that the audio source is properly connected.
A. The sound level is weak
C. Selecting the Audio Stereo when the input is Mono
S. Selecting the Audio Mono input or introducing stereo sound in the
input.
A. The level of sound is different to the rest of the channels.
C. The audio level selected is not the right one.
S. Use the PS programmer to modify the audio level.
A. The output audio signal is neither stereo nor dual.
C. The audio source or audio signal selection at the modulator is not
correct.
S. Check whether the audio source is stereo or dual and select the
correct audio signal on the modulator.
A. Continuous problems in several modules (
C. Wrong module supply
S. Check the voltages in the last module using a voltmeter. If the
voltages are lower than the indicated ones, check that the supply
cables are in good shape and deeply plugged in.
Installation and programming manual
912
OUTPUT
5 v
5 v
13 v
13 v
30 v
FA-203
Fig. 10 - Measuring voltage
MS-511/512/513/514)
912
MS-511
5 v
V
DC
.