Test Mode - Sony STR-DB900 Service Manual

[FL TEST MODE]
Fluorescent segments display test
Procedure:
1. Press the [POWER] button to turn the set off.
2. To enter the test mode, while pressing the two buttons [DISPLAY] and [SOUND FIELD], press [POWER] button.
3. All segments turn on.
4. To exit from this mode, press the [POWER] button to turn the set off.
[VERSION CHECK]
Firmware Version Check
Procedure:
1. Press the [POWER] button to turn the set off.
2. To enter the test mode, while pressing the two buttons [DIRECT] and [SOUND FIELD], press [POWER] button.
3. The message version " DB9 CE 1.05 " is displayed.
4. To exit from this mode, press the [POWER] button to turn the set off.
[KEY CHECK]
Check the buttons operate normally or not.
Procedure:
1. Press the [POWER] button to turn the set off.
2. To enter the test mode, while pressing the two buttons [DIRECT] and [SURR BACK DECODING], press [POWER] button.
3. The message " RESET ** " is displayed.
**: Number of buttons
4. Every time you press the button, ** counts down one by one.
5. In case of every buttons are pressed, the finished indication " RESET 00 " appears.
6. To exit from this mode, press the [POWER] button to turn the set off.
[SWAP ALL MODE]
Outputs of speakers checking mode. The L/R channel signals output from all of the speakers.
Procedure:
1. Press the [POWER] to turn the set off.
2. To enter the test mode, while pressing the two buttons [INPUT MODE] and [MULTI CH IN], press [POWER] button.
3. The message " SWAPMODE " is displayed.
4. The L/R channel signals output from all of the speakers.
5. In this mode, every time pressing [PRESET +] button, VOLUME LEVEL changes.
VOL MIN
6. To exit from this mode, press the [POWER] button to turn the set off.
[HISTORY MODE]
Display of the internal information on the protector being activated.
(SF, Volume level value, Tone setting, Operating time)
Procedure:
1. Press the [POWER] button to turn the set off.
2. To enter the test mode, while pressing the two buttons [INPUT MODE] and [SURR BACK DECODING], press [POWER] button.
SECTION 3

TEST MODE

VOL 34 VOL MAX
STR-DB900
7