Servicing Note - Sony STR-DB725 Service Manual
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Also See for STR-DB725:
- Service manual (12 pages) ,
- Service manual (13 pages) ,
- Operating instructions manual (40 pages)
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FACTORY SET
Mode which sets the preset settings of the unit to that at shipment.
Procedure:
While pressing the < button and BASS BOOST button together, press the 1/u button to turn on the power.
"FACTORY" will be displayed and factory settings executed.
INITIALIZATION
Mode which erases all the preset settings of the unit.
Use this mode when returning the unit to the customer.
Procedure:
While pressing the MEMORY button and MUTING button together, press the 1/u button to turn on the power.
"ALL CLEAR" will be displayed and initialization executed.
FLUORESCENT INDICATOR TUBE AND LED LIGHTING CHECK
Mode which lights up the whole fluorescent indicator tube or partially.
Procedure:
While pressing the ∨ button and BASS BOOST button together, press the 1/u button to turn on the power.
The whole fluorescent display tube lights up.
The fluorescent display tube and LED light up in the following sequence each time the FUNCTION knob is rotated.
The fluorescent display tube: All light up
LED: VIDEO 1 , VIDEO 3 , TAPE/MD ,
5.1/DVD INPUT , MASTER VOLUME
and SURROUND light
Turn the FUNCTION knob
The fluorescent display tube: Light up partially (1)
LED: TV/LED , CD , PHONO ,
TONE , BASS/TREBLE and
MASTER VOLUME light
Turn the FUNCTION knob
The fluorescent display tube: Light up partially (2)
LED: VIDEO 2 , TUNER , BASS BOOST ,
INDEX , MASTER VOLUME and
MUTING light
Turn the FUNCTION knob
The fluorescent display tube: All lights out
LED: All lights out
Turn the FUNCTION knob
KEY CHECK
Mode for checking key input.
Procedure:
Turn on the power by pressing the 1/u button while pressing the ∧ button and the BASS BOOST button. "REST 25 KEY" is displayed.
The count decreases each time the button is pressed.
Buttons counted once will not be couned again.
"REST 00 KEY" is displayed when all the buttons are pressed.
SECTION 1
SERVICING NOTE
– 3 –
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