Service Mode - Sony HCD-ZX70DVD Service Manual

3.

SERVICE 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. Press three buttons x , DISPLAY , and DISC 5 simultaneously.
2. The fluorescent indicator tube displays "COLD RESET" and
the set is reset.
Note: To initialize DVD, refer to "Initializing set up data" in the "4. TEST
MODE 4-7. EMERGENCY HISTORY" (see page 15).
[MC Hot Reset]
• This mode resets the set with the preset data kept stored in the
memory. The hot reset mode functions same as if the power
cord is plugged in and out.
Procedure:
1. Press three buttons x , DISPLAY , and DISC 1 simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[CD Service Mode]
• This mode can run the CD sled motor freely. Use this mode, for
instance, when cleaning the optical pick-up.
Procedure:
1. Enter the test mode. (Refer to "4. TEST MODE" on page 7)
[2]
2. Press the key of remote commander to enter the "Drive
Manual Operation".
[2]
3. Press the key of remote commander to enter the "Servo
Control". (Refer to "2. Servo Control" on page 14)
4. Press the t (outward) or T (inward) key of remote
commander to move the sled motor.
5. To release this mode, press the ?/1 button to turn the power
OFF.
Note: • Always move the pickup 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.
• Remote commander: RM-SD170 (Part No.: 1-418-911-11)
[VACS ON/OFF Mode]
• This mode is used to switch ON and OFF the VACS (Variable
Attenuation Control System).
Procedure:
1. Press ?/1 button to turn the set ON.
2. Press the PUSH ENTER and x buttons simultaneously. The
message "VACS OFF" or "VACS ON" appears.
[Change-over of AM Tuner Step between 9 kHz and
10 kHz] (Except AEP, UK and Saudi Arabia models)
• A step of AM channels can be changed over between 9 kHz and
10 kHz.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Select the function "TUNER", and press TUNER/BAND
button to select the BAND "AM".
3. Press ?/1 button to turn the set OFF.
4. Press MODE SELECT and ?/1 buttons simultaneously, and
the display of fluorescent indicator tube changes to "AM 9 k
STEP" or "AM 10 k STEP", and thus the channel step is
changed over.
[GC Test Mode]
• This mode is used to check the software version, FL tube, LED,
keyboard and VACS.
Procedure:
1. Press ?/1 button to turn the set ON.
2. Press three buttons x , DISPLAY , and DISC 2 simultaneously.
3. LEDs and fluorescent indicator tube are all turned on.
4. When you want to enter the software version display mode,
press DISC 1 . The model number and destination are displayed.
5. Each time DISC 1 is pressed, the display changes starting
from Z-DVD version, MC version, GC version, VC version,
DVD version, ST version, TC version, TA version, TM version
and BR version in this order, and returns to the model number
and destination display.
6. When DISC 3 is pressed while the version numbers are being
displayed except model number and destination, year, month
and day of the software creation appear. When DISC 3 is
pressed again, the display returns to the software version display.
When DISC 1 is pressed while year, month and day of the
software creation are being displayed, the year, month and day
of creation of the software versions are displayed in the same
order of version display.
7. Press DISC 2 button, and the key check mode is activated.
8. In the key check mode, the fluorescent indicator tube displays
"K Vo Stick N". Each time a button is pressed, "K 0"
value increases. However, once a button is pressed, it is no longer
taken into account.
"Vo 0" value increases like 1, 2, 3 ... if rotating VOLUME
knob in "+" direction, or it decreases like 0, 9, 8 ... if rotating in
"–" direction.
Moving the stick changes the "STICK N" display.
: "STICK R "
When moved up
When moved down : "STICK r "
When moved to the left : "STICK T"
When moved to the right : "STICK t"
9. Also when DISC 3 is pressed after lighting of all LEDs and FL
tubes, value of VACS appears.
10. To exit from this mode, press three buttons in the same manner
as step 1, or disconnect the power cord.
5