HCD-V5500, MHC-V5500, MHC-V7700AV - Sony Audio Service Manual (repair manual). Page 7

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On this mode, the data of the color-bars signal as a picture signal
and the 1kHz sine wave signal as a sound signal are output by the
mechanism control microcomputer (IC701) for 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 J9001
(VIDEO OUT) and the sound signal can be observed at J101
(VIDEO (AUDIO) OUT) using an oscilloscope.

1.

Connect the lead wire to both ends of the land of SL701 (CAL
BAR) 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.

Note :

The 1kHz sine wave is not outputted when the CD is played

once, but it is not error.

SL703 (AFADJ)

SL702 (ADJ)

SL701 (CAL BAR)

IC751

IC251