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Electronics => Repair => Topic started by: Vince56 on October 18, 2015, 06:14:36 pm

Title: Quatro CTV-7230 TXT-S Repair
Post by: Vince56 on October 18, 2015, 06:14:36 pm

I have a CRT Quadro who will not turn on. Signal red LED works, but there is no picture or sound. I do not know where to start to repair. If anyone knows what to do please tell. Greetings from Croatia .

Title: Re: Quatro CTV-7230 TXT-S Repair
Post by: HighInBC on October 18, 2015, 06:22:46 pm

I don't know what is wrong, but you should be aware that you can get a high voltage shock from a CRT even if it is not plugged in. The charge can remain in the CRT for a very long time after being unplugged. If you touch the wrong part you are going to have a bad time.

Title: Re: Quatro CTV-7230 TXT-S Repair
Post by: Vince56 on October 18, 2015, 07:14:36 pm

I am aware of high voltage parts, and take care to avoid them. By the way capacitors do not look bloated or burned.

Title: Re: Quatro CTV-7230 TXT-S Repair
Post by: tec5c on October 18, 2015, 10:46:47 pm

Are there any strange buzzing noises coming from inside the unit when it is powered on?

Title: Re: Quatro CTV-7230 TXT-S Repair
Post by: Vince56 on October 19, 2015, 08:17:48 am

There is a very weak sound. Similar whimpering inductors.

Title: Re: Quatro CTV-7230 TXT-S Repair
Post by: Vince56 on October 20, 2015, 06:55:46 pm

UPDATE - The display shows the white line in the middle of the screen; Similarly in this figure

http://www.overclockers.com.au/wiki/images/e/e7/Electronics_001small.jpg (http://www.overclockers.com.au/wiki/images/e/e7/Electronics_001small.jpg)

What could be