Test Mode - Sony HCD-GNX780 Service Manual

[GC TEST MODE]
• This mode is used to check the fluorescent indicator tube,
LEDs, keys, VOLUME jog, OPERATION DIAL jog, AMS
jog, destination, software version and VACS level.
Procedure:
1. Press x button, [ENTER] button and [DISC 2] button-
simultaneously.
2. All LEDs and segments in fluorescent indicator tube are lighted
up. All LEDs are lighted up in red color.
3. When you want to enter the software version display mode,
press [DISC 1] button. The model is displayed.
Press [DISC 1] button again to show destination.
4. Each time [DISC 1] button is pressed, the display changes from
MC version, GC version, SYS version, CD version, CDDM
version, CDMA version, CDMB version, BDA version, BDB
version, ST version, TC version, TA version, TM version in
this order, and returns to the MC version display.
5. When [DISC 3] button is pressed while the version numbers
are being displayed except model and destination, the date of
the software creation appear. When [DISC 3] button is pressed
again, the display returns to the software version display. When
[DISC 1] button is pressed while the date of the software
creation is being displayed, the date of the software creation
is displayed in the same order of software version display.
6. Press [DISC 2] button, the key check mode is activated.
7. In the key check mode, the fluorescent indicator tube displays
"K 0 V0J0".
Each time a button is pressed, "K" value increases. However,
once a button has been pressed, it is no longer taken into
account.
"V" value increases in the manner of 0,1, 2, 3 ... if [VOLUME]
knob is turned clockwise, or it decreases in the manner of 0,
9, 8, 7 ... if [VOLUME] knob is turned counter-clockwise.
"J" value increases in the manner of 0,1, 2, 3 ... if [OPERATION
DIAL] knob is turned clockwise, or it decreases in the manner
of 0, 9, 8, 7 ... if [OPERATION DIAL] knob is turned counter-
clockwise.
8. When [DISC 3] button is pressed after all LEDs and segments
in fluorescent indicator tube light up, the fluorescent indicator
tube displays "VACS A+B FAPC". A is VACS level which is
trigger by signal level, B is VACS level which is trigger by
temperature and C is VACS level which is trigger by APVACS
(Abuse Protection VACS).
F is shown if the fan is turned in high speed and vice-versa.
The signal level, which will trigger VACS A is shown in the
center area of fluorescent indicator tube.
9. When [EX-CHANGE/DISC SKIP] button is pressed after all
LEDs and segments in fluorescent indicator tube light up,
alternate segments in fluorescent indicator tube would light
up. If you press [EX-CHANGE/DISC SKIP] button again, another
half of alternate segments in fluorescent indicator tube would
light up. Pressing [EX-CHANGE/DISC SKIP] button again
would cause all segments lights up.
10. To release this mode, press three buttons in the same manner
as step 1, or disconnect the power cord.
SECTION 4

TEST MODE

[MC TEST MODE]
• This mode is used to check operations of the respective sections
of Amplifier, Tuner, and Tape.
Procedure:
* To enter MC Test Mode
1. Press x button, [ENTER] button and [DISC 3] button
simultaneously.
2. The CD ring indicators TAPE A and B indicators flash on the
fluorescent indicator tube. The function is changed to TV.
* Check of Amplifier
1. Press [EQ BAND] button repeatedly until a message "GEQ
MAX" appears on the fluorescent indicator tube. GEQ
increases to its maximum.
2. Press [EQ BAND] button repeatedly until a message "GEQ
MIN" appears on the fluorescent indicator tube. GEQ decreases
to its minimum.
3. Press [EQ BAND] button repeatedly until a message "GEQ
FLAT" appears on the fluorescent indicator tube. GEQ is set
to flat.
4. When the [VOLUME] knob is turned clockwise even slightly,
the sound volume increases to its maximum and a message
"VOLUME MAX" appears on the fluorescent indicator tube.
5. When the [VOLUME] knob is turned counter-clockwise even
slightly, the sound volume decreases to its minimum and a
message "VOLUME MIN" appears on the fluorescent
indicator tube.
* Tape function
1. When a tape is inserted in Deck B and recording is started, the
function is changed to TV automatically. When [CD SYNC]
button is pressed during recording in function, ALC (Automatic
Logic Control) is turned on.
2. During recording, press
the function is changed to TAPE B and rewind the tape in
Deck B until the recording start position and playback of the
tape in Deck B is started. If the [REC PAUSE/ START] button
is pressed for a pause and pressed again to resume recording
during recording time, when the tape is rewind, the tape will
be rewind until the position where the pause is applied.
* To release MC Test mode.
1. To release this mode, press
2. The cold reset is enforced at the same time.
[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 x button, [ENTER] button, and
simultaneously.
2. The fluorescent indicator tube becomes blank for a while, and
the set is reset.
HCD-GNX780/GNX880
will stop the recording and
m
button.
?/1
?/1
button
17