Read Sony HCD-V717 / MHC-V717 Service Manual online
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[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
(VIDEO OUT) and the sound signal can be observed at J101
(VIDEO/MD (AUDIO) OUT) using an oscilloscope.
Procedure:
1. Connect the lead wire to both ends of the land of SL503 of the
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
(VIDEO OUT) and the sound signal can be observed at J101
(VIDEO/MD (AUDIO) OUT) using an oscilloscope.
Procedure:
1. Connect the lead wire to both ends of the land of SL503 of the
VIDEO board.
2. Turn the power on. Press
[FUNCTION]
button to select CD.
3. After 2 or 3 seconds later, connect the lead wire.
4. After measuring, remove the lead wire connected.
4. After measuring, remove the lead wire connected.
[VIDEO board]
(Side A)
D502
SL501
SL503
SL502
IC505
[VIDEO board]
(Side B)
SL503
IC502
CN501
CN503
SL502
SL501
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