Sony AV Receiver – Sony STR-DE575 - K502 - K502P – Factory reset – FLD test mode – Sound filed test – DSP test

Sony STR-DE575 - K502 - K502P:  FACTORY PRESET MODE
All preset contents are reset to the default setting.
Procedure:
While depressing the VIDEO and the 2CH buttons simultaneously, press the power button to turn on the main power.
The message FACTORY appears and switch off the set.
While depressing the VIDEO and the 2CH buttons simultaneously, press the power button again. The message FACTORY appears and the present contents are reset to the default values.
AM CHANNEL STEP 9 KHZ/10 KHZ SELECTION MODE
Either the 9 kHz step or 10 kHz step can be selected for the AM channel step.
Procedure:
Set the FUNCTION to AM. Turn off the main power.
While depressing the TUNING+ button or the PRESET TUNING+ button, press the power button to turn on the main power. Either the message 9 k STEP or 10 k STEP appears. Select the desired step.
For US/Canadian/E model only
DSP VERSION DISPLAY MODE
DSP version is displayed.
Procedure :
While depressing the MD/TAPE and the A.F.D buttons simultaneously, press the power button to turn on the main power.

“ DSP ”and the version are displayed.
FLUORESCENT INDICATOR TUBE TEST MODE
All fluorescent segments are tested. When this test is activated, all segments turn on at the same time, then each segment turns on one after another.
Procedure:
While depressing the MD/TAPE and the SHIFT buttons simultaneously, press the power button to turn on the main power.
1. All segments turn on.

All LED turn on.
2. Press the VIDEO button, confirm display

MULTI CHANNEL DECODING (blue), Digital Cinema Sound , LEVEL , SET UP , A.F.D and MODE LED turn on.

3. Press the VIDEO button, confirm display.

EQ , SUR , NAME and 2CH LED turn on.
4. Press the VIDEO button, All segments turn off.
5. Every pressing of the VIDEO button turns on each segment and LED one after another in the same order.
(Not only the VIDEO button, but also the other buttons such as DVD/LD , TV/SAT , MD/TAPE , CD , TUNER and AUX can be used.)
SOUND FIELD CLEAR MODE
The preset sound field is cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair.
Procedure:
While depressing the SOUND FIELD MODE button, press the power button to turn on the main power. The message SURR. CLR. appears and initialization is performed.
DEMONSTRATION MODE
Demonstration is performed.
Procedure :
While depressing the SET UP button, press the power button. The message appears and demonstration is performed.
To finish DEMONSTRATION MODE, press the power button while the introduction message appears in the display.
SOFTWARE VERSION DISPLAY MODE
The software version is displayed.
Procedure:
While depressing the TUNER and the SHIFT buttons simultaneously, press the power ?/1 button to turn on the main power. The model name, destination and the software version are displayed.
KEY CHECK MODE
Button check
Procedure:
While depressing the VIDEO and the SHIFT buttons simultaneously, press the power ?/1 button to turn on the main power.
“REST 36” appears.
Every pressing of any button other than POWER and SPEAKERS counts down the buttons. The buttons which are already counted once are not counted again. When all buttons are pressed “REST 00” appears.
When MASTER VOLUME is rotated in clockwise direction, “VOL MIN”, “VOL 1” to “VOL 48”, “VOL MAX” appear.

DSP TEST MODE
DSP tests are performed.
Procedure :
1. While depressing the LEVEL and CD buttons simultaneously, press the power  Button to turn on the main power.
2. Press the NAME button.
3. Select the item by pressing Cursor button ( < or > ).
4. Select the function by turning Jog dial if selection is necessary.