HCD-VX222, MHC-VX222 - Sony Audio Service Manual (repair manual). Page 16

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2)  Operation during aging mode
In the aging mode, the program is executed in the following
sequence.
(1)

The disc tray opens and closes.

(2)

The mechanism accesses DISC 2 and makes an attempt to
read TOC.  However, since there are no discs, a message
“CD2 NO DISC” appears.

(3)

The mechanism accesses DISC 3 and a message “CD3 NO
DISC” appears.

(4)

The disc tray turns to select a disc1.

(5)

A disc is chucked.

(6)

TOC of disc is read.

(7)

The pickup accesses to the track 1, and  playing 2 seconds.

(8)

The pickup accesses to the last track, and playing 2 seconds.

(9)

Every time when an aging operation of step 1 to step 8 is
complete, the display “AGING[*][*][*][*]” value increases
as the number of aging operations is counted up.

(10) Returns to step 1.

3. Aging Mode in Tape Deck section
1) Display state
• No error occurs

Display action now

• Error occurred

Display action last time

2)  Operation during aging mode
In the aging mode, the program is executed in the following
sequence.
(1) Rewind is executed up to the top of tape A and B.
(2) A tape on FWD side is played for 2 minutes.
(3) FF is executed up to either made for 20 second or the end of

tape.

(4) B tape is reversed, and the tape on REV side is played for 2

minutes.

(5) Rewind is executed up to the top of tape.
(6) Returns to step 2, and repeat steps from 2 to 5.

[Function Change Mode]
* elect either VIDEO or MD of the external FUNCTION input.

Procedure:
1.

Turn on the power.

2.

Press the two buttons  MD (VIDEO)  and  ?/1  at the same
time.
The main power is turned on and the other function of the
previous function is selected and displayed.  “MD” or
“VIDEO”.

NO. Display action

Action contents

Final timing

1

TAPE A AG-6

Rewind the TAPE A

The top of tape

TAPE B AG-1

Rewind the TAPE B

2

TAPE A AG-2

FWD play the TAPE A

2 minutes playing

3

TAPE A AG-3

F.F. the TAPE A

20 second FF or the end
of tape

4

TAPE A AG-4

REV play the TAPE A

2 minutes playing

5

TAPE A AG-5

Rewind the TAPE A

The top of tape

6

TAPE B AG-2

FWD play the TAPE B

2 minutes playing

7

TAPE B AG-3

F.F. the TAPE B

20 second FF or the end
of tape

8

TAPE B AG-4

REV play the TAPE B

2 minutes playing

9

TAPE B AG-5

Rewind the TAPE B

The top of tape

[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 J705 (VIDEO
OUT board) using an oscilloscope.
Procedure:
1.Short the both ends of the land of SL503 of the VIDEO board.
2.Turn the power on. Press the  CD  button to select CD.
3.The color-bars appears when the CD is in stop status, and it
   disappears when the CD goes in play status.
4.After measuring, remove the lead wire connected.

[CD Servo ON/OFF Mode]
Procedure:
1.

Short SL502 on the VIDEO board by soldering.

2.

Turn on the main power.  Set a disc on the DISC1 tray.  Select
CD.

3.

Press the hH button to play back CD.

4.

When the  >  button is pressed, 100 track jump is executed.

5.

Also, every pressing of the PLAY MODE button triggers
between  ON and OFF of TRACKING SERVO and SLED
SERVO.

How to quit the CD servo ON/OFF mode:
1.

Press the  ?/1  button to turn off the main power.

2.

Remove soldering from SL502.

J301

CN301

CN501

CN503

SL503

SL502

SL501

CHECK LED

CN502