HCD-VX555, HCD-VX555J, MHC-VX555, MHC-VX555J - Sony Audio Service Manual (repair manual). Page 13

13

* Tape function
1. When a tape is inserted in Deck B and recording is started, the

input source function selects VIDEO automatically.
When  CD SYNC/HI-DUB  button is pressed during Rec in
function, ALC is turned on.

2.   When   x  button is pressed to stop recording, the Tape (Deck)

B is selected and tape is rewound, tape is rewound using  m
button, tape is stops at around the record-starting position and
playback of the recorded portion of the tape is started.  If PAUSE
is inserted even once during recording, tape is rewound to the
position around the PAUSE position and is played back.

3.

When  CD SYNC / HI-DUB  button is pressed during playback
of Deck B, either normal speed or high speed can be selected
by this button.

* AMS Test Mode
1.

Set TAPE function

2.

Select the desired loop by pressing the  PLAY MODE  button.
Insert a test tape AMS-110A or AMS-120 to Deck A.

3.

Press the  SPECTRUM  button to enter the AMS test mode.

4.

After a tape is rewound first, the FF AMS is checked, and the
mechanism is shut off after detecting the AMS signal twice.

5.

Then the REW AMS is checked and the mechanism is shut off
after detecting the AMS signal twice.

6.

When the check is complete, a message of either OK or NG
appears.

* To return to normal mode again.
1.

When you want to exit this mode, press the  ?/1  button.

2.     The cold reset is enforced at the same time.

[VACS ON/OFF Mode]
• This mode is used to switch ON and OFF the VACS (Variable

Attenuation Control System).

Procedure:
Press the  ENTER  and  SPECTRUM  buttons simultaneously.  The
message “VACS OFF” or “VACS ON” appears.

[CD Aging Mode]
Procedure:
1.

Short SL501 by soldering.

2.

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

3.

Press the  SELECT/gG  button.  The aging mode starts.

4.

Aging status appears on the monitor screen.

How to exit the CD aging mode:
1.

Press the  ?/1   and turn off the main power.

2.

Remove soldering from SL501.

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

Procedure:
1.

Turn on the power.

2.

Press the two buttons  ENTER  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”.

[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 CN301 pin2
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.VIDEO board

(SIDE B)

[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.

[CD Ship Mode (Memory Clear) ]
• This mode moves the pickup to the position durable to vibra-

tion. Use this mode when returning the set to the customer after
repair.

Procedure:
1. Press

1/u button to turn the set ON.

2. Press  three  buttons  x  , ENTER and GAME  simultaneously.
3. After the "STANDBY" display blinks six times, a message

“LOCK” is displayed on the fluorescent indicator tube, and the
CD ship mode is set.

[CD Ship Mode (No Memory Clear) ]
• This mode moves the pickup to the position durable to vibra-

tion. Use this mode when returning the set to the customer after
repair.

Procedure:
1. Press

1/u button to turn the set ON.

2. Press  CD  button and  

1/u   button simultaneously.

3. After the "STANDBY" display blinks six times, a message

“LOCK” is displayed on the fluorescent indicator tube, and the
CD ship mode is set.