SA-VA100 (serv.man2) - Sony Audio Service Manual (repair manual). Page 4

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Method:
1. In the STANDBY state, press the DOLBY NR button, 

p button,

and DISC 6 button together. All the fluorescent display tubes and
LEDs light up.

2. Press any one button to set the key check mode.
3. When the key check mode is set, KEY TEST is displayed on the

fluorescent display tube.

4. Total pressed number of buttons are displayed below the display.

(When the 

ª, ·, ∏, ¬ buttons are pressed, the LEDs light up.

Each time the DISC 1 to 7 buttons are pressed, the LEDs light up
alternately in orange and green.)
Buttons already pressed once will not be counted when pressed
again.

5. When all 26 buttons are pressed, SUM OK is displayed on the

fluorescent display tube.

6. To exit the mode, disconnect the AC plug from the outlet.

To check the video system of this unit, check that the color bar signal
can be output.
1. In the STANDBY state, press the DOLBY NR button, 

p button,

and OPEN/CLOSE button together.

2. The color bar is output.

The color bar signal is output from the MONITOR OUT terminal.

3. To exit the mode, disconnect the AC plug from the outlet.

The laser diode in the optical pick-up block may suffer electrostatic
break-down because of the potential difference generated by the
charged electrostatic load, etc. on clothing and the human body.
During repair, pay attention to electrostatic break-down and also use
the procedure in the printed matter which is included in the repair
parts.
The flexible board is easily damaged and should be handled with
care.

The laser beam on this model is concentrated so as to be focused on
the disc reflective surface by the objective lens in the optical pick-up
block. Therefore, when checking the laser diode emission, observe
from more than 30 cm away from the objective lens.

Carry out the “S curve check” in “CD section adjustment” and check
that the S curve waveform is output four times.

Mode which clears all the user memories of this unit and sets them to
the same state as that at shipment.

Method:
Press the DOLBY NR button, 

p button, and DISC 7 button together.

This unit is provided with a SHIP mode to reduce damages of the
mechanism section due to shocks during transportation. Set this mode
after repairs before returning the product to the customer.

1. Press the SYSTEM POWER button, and check that all discs 1 to

7 are not in their trays.

2. Press the DOLBY NR button, 

p button, and DISC 7 button to-

gether, and perform cold reset.

3. Press the DIRECTION button, 

p button, and DISC 7 button to-

gether.

4. SHIP is displayed on the fluorescent display tube to indicate that

the SHIP mode has been set.

5. When the mechanism section stops operating, disconnect the AC

plug from the outlet.

Exiting the SHIP mode:
Insert the disconnected AC plug into the outlet again.

This section is extracted from
instruction manual.

1 READY indicator
2 OPERATE indicator
3 CENTER SPEAKER EXT indicator
4 CENTER SPEAKER INT indicator
5 SPEAKERS indicator
6 SPEAKER ON/OFF button
7 HEADPHONES jack

1 2 3 4 5

7

6