Test Mode - Sony MHC-V21D Service Manual

MHC-V21/V21D
Ver. 1.1
PANEL TEST MODE
This mode is used to check the buttons, knob, screen display panel
and LEDs.
Procedure:
1. Press [ ] button to turn on the system.
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2. Press [MIC LEVEL -] and [] buttons simultaneously for 3
seconds.
3. All LEDs and segments in screen display panel are lighted up.
This is the display check mode.
Press [B] button repeatedly to toggle diff erent display mode as
below:
Segments on screen display panel:
All On → 1st Group On → 2nd Group On → All On → All Off
4. Press [  - ] button, the buttons and knob check mode is
activated.
5. In the buttons and knob check mode, the screen display panel
displays "K 0 V0".
Each time a button is pressed, "K" value increases. However,
once a button has been pressed, it is no longer taken into
account. After all the buttons have been pressed, "K" value
will toggle between "OK" and "K22".
"V" value increases in the manner of 0, 1, 2, 3 ... if [VOLUME/
DJ CONTROL] knob is turned clockwise, or it decreases in the
manner of 0, 9, 8, 7 ... if [VOLUME/DJ CONTROL] knob is
turned counterclockwise.
6. To release from this mode, press the buttons in the same
manner as step 2, or disconnect the power cord.
MODEL, DESTINATION AND VERSION DISPLAY MODE
This mode is used to check the model, destination and software
version of the set.
Procedure:
1. Press [ ] button to turn on the system.
1
2. Press [MIC LEVEL -] and [] buttons simultaneously for 3
seconds.
All segments in screen display panel are lighted up.
3. Press [  +] button. Model information appears on the
screen display panel.
4. Press [  +] button again. Destination information appears
on the screen display panel.
5. Press [  +] button. Serial number appears on the screen
display panel.
6. During the serial number display, press [
time [  +] button is pressed, the screen display panel
shows the version of each category software in the following
sequence: SC, MTK, BT, BTE, PF, SUB and return back to
model information display.
7. Press [MIC LEVEL -] and [] buttons simultaneously for 3
seconds to exit.
USER RESET
The user reset clears all data including preset data stored in the data
fl ash to initial conditions.
Procedure:
1. Press [ ] button to turn on the system.
1
2. Press [GUITAR] and [MEGA BASS] buttons simultaneously
for 3 seconds.
3. "RESET" appears on the screen display panel. After that, the
screen display panel becomes blank for a while, and the system
goes to demo mode.
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SECTION 3

TEST MODE

COLD RESET
This mode is used to reset all the user settings to factory setting.
Execute this mode when returning the set to the customer.
Procedure:
1. Press [
2. Press [MIC LEVEL +] and [] buttons simultaneously for 3
seconds.
3. "COLD RST" appears on the screen display panel. After that,
"SONY" appears on the screen display panel. The system
automatically turn on and off once. Please be sure that the
system stay at demo mode fi nally before switch off the power
supply.
DISC TRAY LOCK
When the disc tray does not open and "LOCKED" appears on the
screen display panel, disc tray lock mode has been activated by the
shop front.
To release from Disc Tray Lock Mode:
1. Press [
2. Press [FUNCTION] button repeatedly to select the CD/DVD
function.
3. Press [
and hold down until "UNLOCKED" displayed on the screen
display panel.
SHOP FRONT DEMO
The playback started automatically and the " * DEMO * " appears
on the screen display panel.
This is the Shop Front Demo mode which is activated by the shop
front.
To release from Shop Front Demo
1. Press [MIC ECHO] and [] buttons simultaneously for 5
seconds.
 +] button. Each
] button to turn on the system.
1
] button to turn on the system.
1
TUNING - .] and [B] buttons simultaneously
SYS SET