Friday, September 02, 2016

Sony STR-K870 – Audio Video receiver – How access to test mode – FLD test mode – Factory reset – AV Receiver repair and service

Category: Audio System Repair and Service 

Contents of this article 

  • Factory Reset procedure 
  • FLD Test mode 
  • Sound field Clear mode 

Sony STR-K870

FACTORY PRESET MODE
All preset contents are reset to the default setting.
Procedure:
While depressing the FM MODE and the DISPLAY buttons simultaneously, press the power button to turn on the main power. The message “FACTORY” appears and switch off the set.
While depressing the FM MODE and the DISPLAY buttons simultaneously, press the power 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.
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 TUNING – and the SPEAKERS (OFF/ A/B/A+B) buttons simultaneously, press the power button to turn on the main power.
1. All segments turn on.
2. Press the VIDEO 1 button, confirm display.
3. Press the VIDEO 1 button, confirm display
4. Press the VIDEO 1 button, All segments turn off.
5. Every pressing of the VIDEO 1 button turns on each segment one after another in the same order.
(Not only the VIDEO 1 button, but also the other buttons such as VIDEO 2 , VIDEO 3 , DVD , MD/TAPE , SA-CD/ CD , FM and AM can be used.)
SOUND FIELD CLEAR MODE
The preset sound field is cleared when this mode is activated.
Procedure:
While depressing the 2CH button, press the power button to turn on the main power.
The message “SF. CLR.” appears and initialization is performed.
SOFTWARE VERSION DISPLAY MODE
The software version is displayed.
Procedure:
While depressing the TUNING– 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.
KEY CHECK MODE
Button check
Procedure:
While depressing the TUNING – and the MAIN MENU buttons simultaneously, press the power  button to turn on the main power. “REST 30” appears.
Every pressing of any button other than POWER  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 69”, “VOL MAX” appear.
AUTO BETICAL MODE
Procedure:
1. Check that the antenna is connected.
2. Press the POWER  button to turn on the power while pressing the MEMORY button.
CHANGE COMMON MODE
This mode is command mode changed to AV 1 or AV2.
Procedure:
While depressing the ENTER button, press the power  button to turn on the main power.
Either the message “C.MODE.AV 1” or “C.MODE.AV 2” appears.
SHIPMENT MODE
All preset contents are reset to the default setting.
Procedure:
While depressing the SPEAKERS (OFF/A/B/A+B) and the
FM buttons simultaneously, press the power button to
turn on the main power. “CLEARED” appears.