Sony HCD-GX250, Servce Manual

Page: 19 / 64

19
HCD-GX250
[MC Test Mode]
• This mode is used to test the function of the equalizer.
Procedure:
1. Press
?
/
1
button to turn the set ON.
2. To enter the test mode, press the three buttons
x
, PLAY
MODE/TUNING MODE and DISC 3 simultaneously.
3. Press the EQ + button.
The function of the equalizer is set to “MIN”.
4. Press the EQ - button.
The function of the equalizer is set to “MAX”.
5. Press the PRESET EQ button.
The function of the equalizer is set to “EQ FLAT”.
6. MASTER VOLUME up and down.
“VOLUME MIN” “VOLUME 16” “VOLUME MAX” is
displayed.
7. Press the GROOVE button.
The message “VACS OFF” or “VACS ON” is displayed.
8. To exit from this mode, press
?
/
1
button to turn the set OFF.
[CD Ship Mode (LOCK) ]
• This mode moves the pick-up to the position durable to vibra-
tion. Use this mode when returning the set to the customer after
repair.
Procedure:
1. Press
? / 1 button to turn the set ON.
2. Select the function “CD”.
3. Press
?
/
1
button to turn the set OFF.
4. Press CD button and
?
/
1
button simultaneously.
5. The “STANDBY” display blinks instantaneously, and the CD
ship mode is set.
[CD Ship (LOCK) & COLD RESET MODE]
Procedure:
1.
Press
?/1
button to turn the set ON.
2. Select the function “CD”.
3. Press ?/1 button to turn the set OFF.
4. Press three buttons
x
, CD and DISPLAY simultaneously.
5. The “STANDBY” display blinks instantaneously and CD ship
mode is set.
6. To fluorescent indicator tube displays “COLD RESET” and
the set is reset.
[Disc Tray Lock]
Procedure:
1.
Press the ?/1 button to turn the set ON.
2. Press two buttons of x and Z simultaneously for five seconds.
3. The message “LOCKED” is displayed and the tray is locked.
(Even if exiting from this mode, the tray is still locked.)
4. Press two buttons of
x
and
Z
simultaneously for five seconds
again.
5. The message “UNLOCKED” is displayed and the tray is
unlocked.
6. To exit from this mode, press the
?/1
button to turn the set
OFF.
[PANEL Test Mode]
• All fluorecent segments and LEDs are tested.
• Keyboard check.
Procedure:
1. Press
?
/
1
button to turn the set ON.
2. To enter the test mode, press the three buttons x , PLAY
MODE/TUNING MODE and ENTER simultaneously.
3. All segments and LEDs (without STANDBY LED) are turned
on.
4. Press
X
and ENTER buttons simultaneously, and the key
check mode is activated.
5. The message “KEY 0 0 0 ” is displayed.
Each time a button is pressed, the key code number is displayed.
6. Press
X
and ENTER buttons simultaneously, and the key
count mode is activated.
7. The message “KEYCNT 0” is displayed.
Each time a button is pressed, “KEYCNT 0” value increased.
However, once a button is pressed, it is no longer taken into
account.
8. Press
X
and ENTER buttons simultaneously, and the head
phone detect mode is activated.
9. The message “H_P OFF” is displayed when a headphone jack
is not inserted.
“H_P ON ” is displayed when a headphone jack is inserted.
10. Press
X
and ENTER buttons simultaneously, and the volume
control detect mode is activated.
11. The message “VOLUME FLAT” is displayed.
“VOLUME UP” is displayed if rotating MASTER VOLUME
knob clockwise, or “VOLUME DOWN” is displayed if rotating
counterclockwise.
12. To exit from the GC test mode after the head phone detect mode,
press X and ENTER buttons simultaneously.
[Version and Destination Display Mode]
• The version or destination is displayed.
Procedure:
1. Press
?
/
1
button to turn the set ON.
2. To enter the test mode, press the three buttons
x
, PLAY
MODE/TUNING MODE and DISC 2 simultaneously.
3. The destination is displayed.
4. Press DISPLAY buttons simultaneously.
5. The version is displayed.
6. To exit from this mode, press
?
/
1
button to turn the set OFF.
[CD Service Mode]
• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the pick-up.
Procedure:
1. Press
? / 1 button to turn the set ON.
2. Select the function “CD”.
3. To enter the test mode, press three buttons
x
, PLAY MODE/
TUNING MODE , and
Z
simultaneously.
4. The CD service mode is selected.
5. With the CD in stop status, press
M button to move the
pick-up to outside track, or press m button to inside track.
6. To exit from this mode, perform as follows:
1) Move the pick-up to the most inside track.
2) Press
?
/
1
button to turn the set 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.
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