Question about Philips DIRECTV H20 DTV Receiver

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H20-600 Overheating causing "Searching for Satelite" Code 771

I've had my (reconditioned) H20-600 receiver for 2 yrs 1 month and suddenly 2 weeks ago while watching a program, the screen suddenly went blank and then a message "searching for satellite" (code 771) appeared. After a few minutes of waiting I decided to reset the receiver and the program did eventually come back. I did notice that the receiver felt unusually warm/hot to the touch. I vacuumed any dust that may have accumulated, especially the vents at the top, bottom, and sides of the case. Everything seemed fine for about 1 week (although unit still seemed warm/hot) and then the problem reappeared. Now it's happening more and more frequently (several times a day). I can temporarily solve the problem by simply blowing cool air into the side vent using a small fan, but I'm concerned that there is an underlying problem with this unit (being cynical, I've got to wonder if DirecTv has a 2yr self-destruct built into the unit forcing you to buy another receiver ... and oh yeah, a new 2 year service agreement!).

I'm just curious ... in another post, Dan reported a way to display the internal temperature of the unit, but I don't see "More System Info" selection (Dan's Step 5). After selecting "Info & Test" I only see two tabs on the right side of the screen: "System Info" tab and "System Test" tab. Under "System Info" tab, there is a scrollable list of info, but nothing related to Internal Temperature. Does anyone know how to display the temperature, or is it possible that my receiver (manufactured in Dec. 2005) may not have this feature?

Steve

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  • smp52 Jul 31, 2009

    There is no permanent fan inside the unit that could possibly fail, only transformers and a large heat sink that appear to be generating most of the heat. Nothing inside the unit (e.g. dust) is blocking air flow.

    Steve

  • smp52 Aug 02, 2009

    Thanks. That was a good suggestion about checking for burnt electronics. I did see an area on the power supply board that had noticeable heat-related discoloration around one device (a 3-pin 24v 1A voltage regulator). This device does NOT have a heat sink on it (unlike some of the others), so one would expect it to dissipate very little power. However, it's getting extremely hot (229 degrees F measured with infrared thermometer; the hottest thing on the board). According to the data sheet for this device, it has internal thermal management so it might be shutting itself down when it exceeds some temperature (I'll need to check). Either the device is bad or something downstream from it is pulling a lot of current. I will give an update after looking into this a little further.

  • smp52 Aug 02, 2009

    Thanks. That was a good suggestion about checking for burnt electronics. I did see an area on the power supply board that had noticeable heat-related discoloration around one device (a 3-pin 24v 1A voltage regulator). This device does NOT have a heat sink on it (unlike some of the others), so one would expect it to dissipate very little power. However, it's getting extremely hot (229 degrees F measured with infrared thermometer; the hottest thing on the board). According to the data sheet for this device, it has internal thermal management so it might be shutting itself down when it exceeds some temperature (I'll need to check). Either the device is bad or something downstream from it is pulling a lot of current. I will give an update after looking into this a little further.

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I had a H20-600 that worked consistently until I unplugged it, then it would not power up unless the unit was warmed to its operating temp. (I placed it on an old iron radiator, warmed it up, it then powered up). The power supply on the unit had several failed, crowned capacitors (3300uf/10v). I pulled them, tested them (one was bad), and then replaced with good caps. Up the unit came. The PS in this unit is a switching unit and needs healthy caps to oscillate and create sub voltages. The standing heat in the unit makes the caps get hot, crown and leak. See any brown sputum on the top of a capacitor and it is on the road to failure.

Posted on Nov 08, 2009

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No way that I am aware of on the H20-600's to check internal temp via the setup screen. The HR20-700's have this.

I just replaced an H20-600 for the same exact problem you are describing. In my case, this unit was a leased receiver and I was billed $15.00 from Directv (shipping charges only) to exchange it.

If yours is a leased unit, that would probably be your best option. Directv can confirm this for you unless you already know.

If not leased and you are sure this is heat related, a USB powered PC cooling pad may help but will probably only postpone the problem until the sensitive component bites the dust for good.

Heat is a killer for all these DTV receivers. I would recommend a cooling pad going forward, leased or not.

Posted on Aug 20, 2009

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If there is a cooling fan in this unit, it's more than likely burned out. turn it on with the case open and check to make sure the cooling fan is running. if not, there is your problem. otherwise, buy a can of "air" and clean out the inside. thats the main cause of dead electronics, too much dust. just vacuuming it out doesn't necessarily remove all of the dust.

Posted on Jul 31, 2009

  • Amanda
    Amanda Jul 31, 2009

    alright then. another possible cause could be a shorted speaker lead. is there any type of odor? this may sound strange, but, smell the inside of the receiver. does it smell like burnt electronics? you may also have an exploded or burned out transformer, or even a bad solder connection. there are a number of possibilities.

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I had the same problem and opened the unit and it will only get SD not HD. A capacitor C185 had burned out. If I could get a schematic and find out the value, I could just buy one and solder a new one in.

Posted on Mar 05, 2011

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