Monday, November 28, 2016

SONY STR-DG520 – How to access Test mode - How to check the display - sound field test – Power amplifier circuit diagram - STK350-530T-E

TEST MODE
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:
Turn the [INPUT SELECTOR] control to set AM and press the [POWER] button to turn off the main power.
While depressing the [TUNING MODE] button, press the [POWER] button to turn on the main power.
Either the message “9k STEP” or “10k STEP” appears for a moment and select the desired step.
VACUUM FLUORESCENT DISPLAY TEST MODE
All fluorescent segments are tested.
When this test is activated, all segments light on at the same time, then each segment lights on one after another.
Procedure:
While depressing the [TUNING MODE] and the [DISPLAY] buttons simultaneously, press the [POWER] button to turn on the main power.
1. ALL segments light on.
2. Turn the [INPUT SELECTOR] control, confirm display.
3. Turn the [INPUT SELECTOR] control, confirm display
4. Turn the [INPUT SELECTOR] control, all segments light off.
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 [2CH] button, press the [POWER] button to turn on the main power.
The message “S.F. CLR.” appears for a moment and initialization  is performed.
SOFTWARE VERSION DISPLAY MODE
The software version is displayed.
Procedure:
While depressing the [SPEAKERS (ON/OFF)] and the [DISPLAY] buttons simultaneously, press the [POWER] button to turn on the main power.
The model name, destination and the software version are displayed for a moment.
KEY CHECK MODE
Button check
Procedure:
While depressing the [SPEAKERS (ON/OFF)] and the [2CH] buttons simultaneously, press the [?/1] button to turn on the main power.
Either the message “REST 13” appears.
Every pressing of any button other than the [POWER] counts down the buttons. The buttons which are already counted once are not  counted again. When all buttons are pressed “REST 00” appears.
SWAP ALL MODE
The signal will be swap to all channel so that all speaker will have sound output.
Procedure:
1. While depressing the [SPEAKERS (ON/OFF)] and the [A.F.D.] buttons simultaneously, press the power [POWER] button to turn on the main power.
2. “SWAP” appears. (No change while displayed.)
SHIPMENT MODE
All preset contents are reset to the default setting.
Procedure:
1. While depressing the [SPEAKERS (ON/OFF)] and the [MUSIC] buttons simultaneously, press the power [POWER] button to turn on the main power.
2. “CLEARED” appears and switch off the set.
RE-BOX CLASSIFICATION TEST MODE
Procedure:
1. While pressing the [MEMORY/ENTER] and the [INPUT
MODE] buttons simultaneously, press the power [POWER] button to turn on the main power.
2. “R.BOX[][][]xxx” appears.
3. xx indicates number of times set powered on.
4. Press any button or power off the set to release test mode.
POWER AMPLIFIER CIRCUIT DIAGRAM  
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