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.

How to use the site:

- If you landed here via any Search Engine, you will get what you searched for and you can search more using the search this blog feature provided by Google. You can visit more posts scrolling the left blog archive of all posts of the month/year,
or you can click on the main photo-page to start from the main page. Doing so it starts from the most recent post to the older post simple clicking on the Older Post button on the bottom of each page after reading , post after post.

You can even visit all posts, time to time, when reaching the bottom end of each page and click on the Older Post button.

- If you arrived here at the main page via bookmark you can visit all the site scrolling the left blog archive of all posts of the month/year pointing were you want , or more simple You can even visit all blog posts, from newer to older, clicking at the end of each bottom page on the Older Post button.
So you can see all the blog/site content surfing all pages in it.

- The search this blog feature provided by Google is a real search engine. If you're pointing particular things it will search IT for you; or you can place a brand name in the search query at your choice and visit all results page by page. It's useful since the content of the site is very large.

Note that if you don't find what you searched for, try it after a period of time; the site is a never ending job !

..............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 !

Tuesday, 5 February 2019

SONY SAVA 500 TEST MODE – SCHEMATIC DIAGRAM - HOME THEATER SPEAKER SYSTEM

Sony SAVA 500 Test mode – Schematic Diagram - Home Theater Speaker System


Sony SAVA-500/SS-CN16/SR16 HOME THEATER ACTIVE SPEAKER SYSTEM – Circuit Diagram – Test modes
KEY CHECK MODE
Procedure
1. Push back [Power] button to turn the power OFF.
2. Connect the lead wire to TP3 and TP4 on the KEY board.
3. Push [Power] button to power ON.
4. Let the lead wire short TP3 and TP4.
5. Fluorescent indicator tube display “KEY CHK 500”, and enter the key check mode.
6. Pressing any buttons, the number of button will be displayed on the fluorescent indicator tube.
7. Pressing the first button turns on the [READY] LED (red), and the second button turns on the [ON] LED (green). Thus, two LEDs light up alternately each time the buttons are pressed.


8. After all buttons are pressed, it will be in the STANDBY mode.
Note: If a check failed, the set does not go in STANDBY state, and you cannot exit from the test mode. In this case, quit the test mode by pushing back [Power] button.

Button functions Input = [1] Surround = [2] Center mode = [3] Woofer = [4] Master volume (-ve) = [5] Master volume (+ve) = [6]
Main board - Circuit diagram and PWB [Click on the pictures to zoom in]
Amplifier board PWB and circuit diagram
Exploded view
AMP CHECK MODE
Procedure
1. Push back [Power] button to turn the power OFF.
2. Connect the lead wire to TP1 and TP2 on the KEY board.
3. Push [Power] button to power ON.
4. Let the lead wire connected TP1 and TP2.
5. Fluorescent indicator tube display “AMP CHK 500”, and enter the amp check mode.
6. The check step advances in order as TP1 and TP2 are shorted.
  The step 12 is the AUTO POWER ON/OFF
 The step 12 is automatically turned the power OFF in one second, ON when a signal is entered to TV input, and OFF when a signal input stops.
After the step 12 finished, return the parameters to default values, then turn the power OFF.
7. To release the test mode, push back [Power] button