4
SECTION 2
TEST MODE
[VIDEO CD Color-bars Mode]
On this mode, the data of the color-bars signal as a picture signal and the 1 kHz sine wave signal as a sound signal are output by the
mechanism controller (IC502) for the video CD signal check. When measurement of the voltage and waveform on the VIDEO board,
perform it in this mode.
For reference, the color-bars signal can be observed at J302/JACK board (VIDEO OUT) and the sound signal can be observed at CNJ151/
MAIN board (AUDIO OUT) using an oscilloscope.
Procedure:
1. Connect the lead wire to both ends of the land of SL503 on the VIDEO board.
2. Turn the power on.
3. After 2 or 3 seconds later, connect the lead wire.
4. After measuring, remove the lead wire connected.
[VIDEO Board]
(Side B)
[VIDEO Board]
(Side A)
D502
SL501
SL503
SL502
IC505
SL503
IC502
CN302
CN503
CN501
SL502
SL501