Test Mode - Sony HCD-VX777 Service Manual

[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
, ENTER , and
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[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:
x
1. Press three buttons , ENTER , and DISPLAY
simultaneously.
2. The fluorescent indicator tube becomes blank instantaneously,
and the set is reset.
[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. =/1
Press button to turn the set ON.
x
2. Press three buttons , 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.
[T uner Step Change]
• A step of AM channels can be changed over between 9 kHz and
10 kHz.
Procedure:
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1. Press button to turn the set ON.
2. Select the function "TUNER", and press TUNER/BAND
button to select the BAND "AM".
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3. Press button to turn the set OFF .
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4. Press ENTER and 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.
[Function Change Mode]
• Select either VIDEO or MD of the external FUNCTION input.
Procedure:
1. Turn on the power.
2. Hold down MD (VIDEO) button then press
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release button first in order not to switch off the set
immediately.
The another function of the previous function is selected , the
input level is also changed and displayed " MD " or "VIDEO".
[GC Test Mode]
• This mode is used to check the software version, FL tube, LED,
keyboard and VACS.
Procedure:
x
1. Press three buttons , ENTER , and DISC 2 simultaneously.
2. LEDs and fluorescent indicator tube are all turned on.
3. When you want to enter the software version display mode,
press DISC 1 . The model number and destination are displayed.
4. Each time DISC 1 is pressed, the display changes starting
from MC version, GC version, CD version, CDDM version,
CDMA version, CDMB, version BDA version, BDB version,
ST version, TA version, TM version and TC version in this
order, and returns to the model number and destination display.
SECTION 3

TEST MODE

5. When DISC 3 is pressed while the version numbers are being
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simultaneously.
6. Press DISC 2 button, and the key check mode is activated.
7. In the key check mode, the fluorescent indicator tube displays
8. Also when DISC 3 is pressed after lighting of all LEDs and FL
9. To exit from this mode, press three buttons in the same manner
[MC Test Mode]
• This mode is used to check operations of the respective sections
Procedure:
* To enter MC Test Mode
1. Press the
2. Press the three buttons of
3. The messages MUSIC, MOVIE, GAME and P FILE flash on
* Check of Amplifier
1.
2. When
3. When
4. When the VOLUME control knob is turned clockwise even
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button , and
5. When the VOLUME control knob is turned counter-clockwise
* Check of clock frequency
1. To check the frequency of clock used to run the time in the unit,
2. The frequency is 32.768 kHz or so.
* Tuner function
1. In the test mode, the default-preset channel is called even when
2. The minimum, center and maximum frequency of each band is
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.
"K V ". Each time a button is pressed, "KEY" value increases.
However, once a button is pressed, it is no longer taken into
account.
"VOL" value increases like 1, 2, 3 ... if rotating VOLUME
knob in "+" direction, or it decreases like 0, 9, 8 ... if rotating in
"–" direction.
tubes, value of VACS appears.
as step 1, or disconnect the power cord.
of Amplifier, Tuner, and Tape.
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button to turn on the set.
simultaneously.
the FL display tube.
The input FUNCTION is Changed to VIDEO.
f
When (CURSOR UP) button is pressed, GEQ increases to
its maximum and a message "GEQ MAX" appears.
F
(CURSOR DOWN) button is pressed, GEQ decreases
to its minimum and a message "GEQ MIN" appears.
g
(CURSOR LEFT) or
is pressed, GEQ is set to flat and a message "GEQ FLAT"
appears.
slightly, the sound volume increases to its maximum and a
message "VOLUME MAX" appears for two seconds, then the
display returns to the original display.
even slightly, the sound volume decreases to its minimum and
a message "VOLUME MIN" appears for two seconds, then the
display returns to the original display.
the clock output is available at pin 39 (IC 501, MASTER
CONTROL) only during MC test mode.
the TUNER is selected and an attempt is made to call the preset
channel that has been stored in memory. (It means that the
memory is cleared.)
set then.
HCD-VX777
Ver 1.4 2002.07
x
, ENTER and DISC 3
G
(CURSOR RIGHT) button
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