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 !

Tuesday, 2 April 2019

SHARP 25RM100 CTV - HOW TO ENTER SERVICE MODE - SMPS AND HORIZONTAL OUT CIRCUIT DIAGRAM

SHARP 25RM100 CTV - HOW TO ENTER SERVICE MODE - SMPS and Horizontal Out Circuit Diagram

Sharp 25RM100N color TV - Service mode entry_Power supply and Horizontal Output Circuit Diagram. How to initialize the settings
SERVICE MODE
* Before putting unit into the service mode, check that customer adjustments are in the normal mode. Use the reset function in the video adjustment menu to ensure customer controls are in  their  proper (reset) position.
* Once in  the  service  mode, press  the  Ch-up / Ch down  button  on  the  remote  controller  or  at  the  set.  The service adjustment number will vary in increments of one, from "S01" to "OP2.
* Press the Vol-up / down button to adjust the data number.
To enter the service mode and exit service mode.
# While pressing the Vol-up and Ch-up buttons at the same time, plug the AC cord into a wall socket.  Now the TV set is switched on and enters the service
mode.
# To exit the service mode, turn the television off by pressing the power button.
RF AGC Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service adjustment "S08".
3. Set the data value to point where no noise or beat appears.
4. Select another channel to confirm that no noise or beat appears.
Note 1 : You will  have to come out of the service mode to select another channel.
Note 2: Setting the data to "00" will produce a black raster. How to initialize the TV
Holding  down  both  the  Vol-up/CH-down  buttons  on  the  TV  set  at  service  mode  for  more  than  2  seconds  will automatically write the above initial values into IC2101.
SMPS (Power Supply Regulator) & H-OUT SCHEMATIC _ CLICK ON THE PICTURES TO MAGNIFY
Posted By: FRANK at 01:49
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