Sony HCD-XGR90AV Service Manual Download Page 15

Page: 15 / 80

HCD-XGR90AV

SECTION 4

TEST MODE

[MC Cold Reset]

• The cold reset clears all data including preset data stored in the

RAM to initial conditions. Execute this mode when returning
the set to the customer.

Procedure:
1. Turn the power ON or set to the DEMO mode.
2. Press three buttons of

/CLOCK SET , TUNER ENTER ,

and

\/1

simultaneously.

3. The set is reset, and displays “COLD RESET”, then becomes

DEMO mode.

[Change-over the AM Tuning Interval]

• The AM tuning interval can be changed over 9 kHz or 10 kHz.
Procedure:
1. Press the

\/1

button to turn the power ON.

2. Select the function “TUNER”, and press the TUNER/BAND

button to select the BAND “AM”.

3. Press the

\/1

button to turn the power OFF.

4. Press the ENTER/NEXT and

\/1

buttons simultaneously,

and the display on the fluorescent indicator tube changes to
“AM 9 K STEP” or “AM 10 K STEP”, and thus the tuning
interval is changed over.

[CD Ship Mode] (No memory clear)

• This mode moves the optical pick-up to the position durable to

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

Procedure:
1. Press the

\/1

button to turn the power ON.

2. Press the EDIT and

\/1

buttons simultaneously.

3. A message “LOCK” is displayed on the fluorescent indicator

tube, and the CD delivery mode is set.

[LED and Fluorescent Indicator Tube All Lit, Key Check
Mode]

Procedure:
1. Press three buttons of

/CLOCK SET , ENTER/NEXT ,

and DISC 2 simultaneously.

2. LEDs and fluorescent indicator tube are all turned on.
3. Press the DISC 1 button, the MODE and DESTINATION are

displayed fluorescent indicator tube.

4. Each time the DISC 1 button is pressed, the MC/GC category

version is displayed in the following order.

5. Press the DISC 2 button, and the key check mode is acti-vated.

6. In the key check mode, the fluorescent indicator tube displays

“K 0 J0 V0”. Each time a button is pressed, “K” value in-creases
to “K69”call the button is pressed.However, once a button is
pressed, it is no longer taken into account.
“J” value increases like 1, 2, 3 ... if turn the

AMS

JOG dial clock-wise,or it decreases like 0, 9, 8 ... if turn the

AMS

JOG dial counter-clockwise.

“V” value increases like 1, 2, 3 ... if turn the VOLUME dial
clockwise (“+” direction), or it decreases like 0, 9, 8 ... if turn
the VOLUME dial counterclockwise (“–” direction).

7. To release from this mode, press three buttons in the same

manner as step 1, or disconnect the power cord.

CDDM

CDMA

CDMB

BDA

BDB

[Sled Servo Mode] (CD service mode)

• This mode can run the CD sled motor freely. Use this mode, for

instance, when cleaning the pick-up.

Procedure:
1. Select the function “CD”.
2. Press three buttons

/CLOCK SET , TUNER ENTER , and

DISC 5 simultaneously.

3. The Sled Servo mode is selected, if “CD” is blanking on the

fluorescent indicator tube.

4. With the CD in stop status, press

button in CD section to

move the pick-up to outside track, or

button to inside track.

5. To exit from this mode, press

\/1

button turn to the power

OFF.

Note:
• Always move the pick-up to most inside track when exiting from

this mode. Otherwise, a disc will not be unloaded.

• Do not run the sled motor excessively, otherwise the gear can

be chipped.

[Change-over of FUNCTION Name]

• The FUNCTION name of external input terminal can be changed

over to VIDEO or MD. With the FUNCTION selected to “MD”,
about 5dB mute is applied to the input gain.

Procedure:
1. Press

\/1

button to turn the power OFF.

2. Press

\/1

button together with FUNCTION button for

several seconds, and the power is turned on, the display of
fluorescent indicator tube changes to “MD” or “VIDEO”
instantaneously, and thus the FUNCTION is changed over.

[Aging Mode]

This mode can be used for operation check of tape deck section.
Tape deck section work in parallel.
• If an error occurred:

The aging operation stops and display then status.

• If no error occurs:

The aging operation continues repeatedly.

Procedure:
1. Load the tapes into the decks A and B respectively.
2. Press the FUNCTION button to select the function “CD”.
3. Press the PLAY MODE button to set the “ALL DISCS” mode,

and press the REPEAT button to “REPEAT” off.

4. Press three buttons of

/CLOCK SET , TUNER ENTER ,

and DISC 4 simultaneously.

5. The aging mode is activated, if the indicator of disc tray num-

ber on the fluorescent indicator tube is blinking.

6. To release from the aging mode, press the

\/1

button to turn

the power OFF and operate the cold reset. (Refer to the “MC
Cold Reset”)

1. Display at the Aging Mode

• Display operating state of tape deck section alternately.
• If an error occurred, stop display.