Sony FM Stereo receiver - STR DE245 SMPS Circuit diagram, Factory reset, Initialization and other adjustments

Sony  STR-DE245 - Sony STR-DE345  FM STEREO FM-AM RECEIVER Schematic and adjustments 

AEP Model, UK Model, E Model, Australian Model - STR-DE245/DE345
US Model, Canadian Model, Chinese Model, PX Model - STR-DE345
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
With 8-ohm load, both channels driven, from 20 – 20,000 Hz rated 100 watts per channel minimum RMS power, with no more than 0.09% total harmonic distortion from 250 milliwatts to rated output.

FACTORY SET MODE
> All preset contents are reset to the default setting.
> Procedure
While depressing the VIDEO and the CD buttons simultaneously, press the power  button to turn on the main power. The message FACTORY appears and the present contents are reset to the default values.

KEY CHECK MODE
> Button check
> Procedure:
While depressing the MD/TAPE and the CD buttons simultaneously, press the power  button to turn on the main power.  “RES 36 KEY” 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 “RES 00 KEY” appears.
When MASTER VOLUME is rotated in clockwise direction, “VOL MIN”, “VOL 1” to “VOL 30”, “VOL MAX” appears.

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+ button, press the power  button to turn on the main power. 

Either the message AM 9 k STEP or AM 10 k STEP appears. 

Select the desired step.

* For US/Canadian/E model only

SURROUND 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 ON/OFF button, press the power [?/1] button to turn on the main power. 

The message SURR CLR appears and initialization is performed.

ALL CLEAR MODE

* All preset contents are cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair.

* Procedure:

While depressing the TUNER and the MD/TAPE buttons simultaneously, press the power  button to turn on the main power. 

The message INITIAL appears and initialization is performed.

Circuit Diagram (Schematics) - Click on the schematics to zoom in

SOFTWARE VERSION DISPLAY MODE

While depressing the TUNER and the VIDEO buttons simultaneously, press the power  button to turn on the main power. 

The model name, destination and the software 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 TV/SAT and the CD buttons simultaneously, press the power button to turn on the main power.

1. All segments turn on.

[SET UP, SOUND FIELD, BASS BOOST and MUTING LED turn on.]

2. Press the VIDEO button, confirm display

[BASS BOOST, MUTING, SET UP and NAME LED turn on.]

3. Press the VIDEO button, confirm display.

[SOUND CONTROL LEVEL, SOUND CONTROL SUR and SOUND FIELD LED turn on.]

4. Press the VIDEO button, All segments turn off.
5. Every pressing of the VIDEO button turns on each segment one after another in the following order.
(Not only the VIDEO button, but also the other buttons such as TV/SAT, MD/TAPE, CD, TUNER can be used.)