REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

©2010, 2011, 2012, 2013, 2014 Frank Sharp - You do not have permission to copy photos and words from this blog, and any content may be never used it for auctions or commercial purposes, however feel free to post anything you see here with a courtesy link back, btw a link to the original post here , is mandatory.
All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Wednesday, 10 April 2019

SONY STR-K870 – AUDIO VIDEO RECEIVER – HOW ACCESS TO TEST MODE – FLD TEST MODE – FACTORY RESET

Sony STR-K870 – Audio Video receiver – How access to test mode – FLD test mode – Factory reset

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.
Posted By: FRANK at 03:59
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