In detail: do-it-yourself dre 4000 repair from a real master for the site my.housecope.com.
As you know from the last article, I started doing home appliance repairs offline. And now there will be a lot of such articles about the repair of various household appliances.
Here is the first one on the topic of repairing household appliances. Although before that there were articles about the repair of household appliances, I did it for myself. This one was already done in his workshop for the repair of household appliances, and not at home.
They asked me to look at the DRE 5000 satellite receiver. Well, since the petitioners were familiar neighbors, I went to their apartment to see the satellite dish at the same time. Since there was a suspicion that the plate moved and got lost. I checked the plate and cable from the DRE 5000 receiver and did not find any faults. When I turned on the DRE 5000 satellite receiver, there was a small hum in the sound on the TV and the picture was falling, that is, there were squares.
Well, from the buzz it is immediately clear that this is a variable background. This means that the voltage is not filtered by the capacitor and the variable component of the voltage creates a buzz.
He told the hostess that the satellite receiver DRE 5000 needs repair. I took the satellite receiver and took it to my parents to check on their satellite dish. Since the satellite receiver DRE 5000 was tuned to Tricolor, and my dish was not tuned to Tricolor. There are 85 degrees and 75 degrees.
When the satellite receiver was turned on, the same symptoms appeared: buzzing and tearing the picture except for the STS channel, squares in the image. That is, it is definitely not the satellite dish that is to blame, but the purely satellite receiver DRE 5000 has fallen into disrepair and needs repair.
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Video (click to play). |
Disassembled the receiver in the workshop. And immediately at the input of the power supply, a swollen capacitor C3 was found - 47 microfarads at 400 volts. Look at the power supply diagram. The capacitor was swollen, most likely due to a voltage drop in the network and therefore lost its properties. He simply did not call the tester at all.
The capacitor was replaced with a working one and again decided to check the DRE 5000 satellite receiver for sound and picture quality. The buzz was gone, but the picture was falling on most channels, but less so.
On the forums, it was advised to remove the capacitor C5 - 100pf per 1000 volts, since it and next to it the capacitor and resistor are filled with composite for something. Over time, the composite loses its properties and begins to conduct current. These parts overlap with each other and the board burns out. I removed the capacitor and cleaned the board from the composite. Look at the photo. But these details do not affect the image and began to dig further.
In the tuner of the DRE 5000 receiver there is an electrolytic capacitor that dries out over time and begins to malfunction. And the receiver you understand is already old and out of production. It is this capacitor that needs to be removed and a new one should be soldered in its place, at 220μF 16 volts. It is easier to solder the conductor to the fifth leg of the tuner so that the tuner is not unsoldered from the board. And that was done.
I checked the DRE 5000 satellite receiver again for image quality. The squares disappeared and the signal from the dish and all channels showed clearly. On this repair of satellite receiver The DRE 5000 was finished and the receiver was handed over to the customer.
Finally, have a laugh, watch the video ...
Copyright Gertc.
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Posted on Monday, June 17th, 2013 at 19:43 Posted in Category Job Offline. Subscribe to comments RSS 2.0, You can skip to the end and leave a response. Pinging is currently not allowed.
