HCD-GNZ7D, HCD-GNZ8D, HCD-GNZ9D, MHC-GNZ7D, MHC-GNZ8D, MHC-GNZ9D - Sony Audio Service Manual (repair manual). Page 21

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21
HCD-GNZ7D/GNZ8D/GNZ9D
SECTION 4
TEST MODE

[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. Press three buttons of  
x
  ,  [DISPLAY] and  [DISC 1]
simultaneously.
2. The message “COLD RESET” is displayed, and the set is reset.

[Tuner Step Change]
• A step of AM channels can be changed over between 9 kHz and
10 kHz.

Procedure:
1. Press the 
 `/1
  button to turn the power ON, and set the function
to TUNER/BAND “AM”.
2. Press the  
`/1
  button to turn the power OFF.
3. Press two buttons of [TUNING +] and  
`/1
  simultaneously, and
the message changes to “AM 9 k STEP” or “AM 10 k STEP”,
and thus the channel step is changed over.

[TV/SAT Function Change]
• Change of function TV or SAT (also the input level changes).
Procedure:
1. Press the  
`/1
  button to turn the power ON.
2. Press two buttons of [TV/SAT] and  
`/1
  simultaneously, and
the message changes to “SAT” or “TV”, and thus the channel
step is changed over.

[Color System Change]
Procedure:
1. Press the  
`/1
  button to turn the power ON.
2. Press two buttons of  
X
  and  
`/1
  simultaneously.
3. The message “COLOR NTSC” or “COLOR PAL” is displayed.

[Disc Tray  Lock]
The disc tray lock function for the antitheft of a demonstration disc
in the store is equipped.
Setting Procedure :
1. Press the  
?/1
  button to turn the power ON.
2. Press two buttons of  
x
  and  
Z
  simultaneously for five seconds.
3. The message “LOCKED” is displayed, and the tray is locked.
Releasing Procedure :
1. Press two buttons of  
x
  and  
Z
  simultaneously for five seconds.
2. The message “UNLOCKED” is displayed, and the tray is
unlocked.

Note: When the message “LOCKED” is displayed, the tray lock is
not released by turning power ON/OFF with the  
?/1
  button.

[Progressive Change]
Procedure:
1. Press the  
`/1
  button to turn the power ON.
2. Press two buttons of [DVD] and [DISPLAY] simultaneously.

[Panel Test  Mode]
• This mode is used to check the fluorescent indicator tube, LEDs,
keyboard, volume and phones.

Enter The Panel Test Mode
Procedure:
1. Press three buttons of  
x
  ,  [DISPLAY] and [DISC 2] simulta-
neously.
2. LEDs and fluorescent indicator tube are all turned on.
Model Information
Procedure:
1. It puts it into the start of the panel test mode.
2. Press the [DIRECTION] button, the mode change model name
or destination display.

Key Test Mode
Procedure:
1. It puts it into the start of the panel test mode.
2. Press the  
Y
  button, the mode change key test mode.

VACS Display
Procedure:
1. It puts it into the start of the panel test mode.
2. Press the  
X
  button, the mode change VACS display.
The message “VACS 0+0” is displayed.

Version Display
Procedure:
1. It puts it into the start of the panel test mode.
2. Press the [DIRECTION] button, the mode change version display.
Press the [DISPLAY] button, the mode change version or days is
displayed.
3. You can exit the Test Mode when you press three buttons of  
X
,
[DISPLAY] and [DISC 2] simultaneously.

[Common Test  Mode]
• This mode is used to check operations of the respective sections
of Amplifier and Tape.

Procedure:
• To enter MC Test Mode
1. Press the  
`/1
  button to turn the power ON.
2. Press three buttons of 
x
  ,  [DISPLAY]  and  [DISC 3]  simulta-
neously.
* Check of Amplifier
Initial settings: Input
, TV
EQ
, FLAT
Mode , MUSIC
VACS , OFF
   • When you press the [EQ BAND/MEMORY] button, the message
“GEQ FLAT” is displayed, and the entire band of the graphic
equalizer is set to the center level.
   • When [VOLUME] control knob is turned clockwise even slightly,
the sound volume increases to is maximum and the message
“VOLUME MAX” is displayed for two seconds, then the display
returns to the original display.
   • When [VOLUME] control knob is tuned counter-clockwise even
slightly, the sound volume decreases to its minimum and the
message “VOLUME MIN” is displayed for two seconds, then
the display returns to the original display.
   • Whenever you press the [GROOVE] button, it toggles between
“VACS ON” and “VACS OFF” so that you can switch ON or
OFF of VACS.
* 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.

[DVD and CD Ship Mode (No Memory Clear)]
• This mode moves the position 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 two buttons of  
x
  and [DISC SKIP] simultaneously.
3. After the “STANDBY” display blinks 15 times, the message
“LOCK” is displayed, and the DVD ship mode is set.

[DVD and CD Ship Mode (Memory Clear)]
• This mode moves the pickup 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 three buttons of  
x
 ,  [DISPLAY] and [DIRECTION] simul-
taneously.
3. After the “STANDBY” display blinks 15 times, the message
“LOCK” is displayed, and the DVD ship mode is set.
Display
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