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RCA DTV Converter box (DTA800B) up and died

greenmeansgoooo 13,930 3,398 October 24, 2010 at 03:40 PM More Walmart Deals
Seems other people that got theirs from WM also had the same problem. [walmart.com]

Before its failure, sometimes it would loose sound or refuse to turn on from standby mode until it was unplugged and re-plugged in.

Now it shows the amber standby light when plugged in, but when you press the power button the amber light goes out, but the green power light doesnt light up.

Seems the one that failed is RCA DTA800B, the older model. The one my parents gave me cause their tv went out and they didnt need their box any more is the newer RCA DTA800B1 newer model, which has some picture/sound improvements. blog [blogspot.com]

Anyone have this problem?

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#2
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Last edited by cvbn October 24, 2010 at 04:16 PM
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#3
yes that is how it was set up, to stay on all the time so that the tivo could change the channels on the box with the IR blasters. but once in a while it would just decide to go into standby mode itself and the only way to get it to power back on was to unplug it. id say that happened about 3-4 times and the sound loss happened 3-4 times too.
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Last edited by greenmeansgoooo October 25, 2010 at 12:43 AM
#4
I have the DTA800B1 model and at least once a week it will need to be reset because the audio will be missing, or it won't switch channels. I just turn it off/on and it works again. Haven't needed to unplug it. A very marginal piece of equipment.
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#5
It's the usual problem with cheap, crappy electrolytic capacitors. Here's what my RCA DTA800b looked like, after just 18 months:



The swollen caps are circled, and they're all in switching voltage regulator circuits (near inductors L803, L804, L805, L806 and 8-pin chips U601 and U801). Basically, anything rated for at least 220uF should be replaced.

220uF, 10V: EC803, EC804
220uF, 25V: C5 (on small board), EC803
470uF, 10V: EC501, EC807, EC810, EC811
470uF, 25V: C4 (on small board), EC801, EC802, EC809
1000uF, 10V: EC806, EC812
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the cost of the replacement caps (and time to fix) exceeds the $10 paid.

i hope the DTA800B1 last longer. we shall see with time.
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Quote from greenmeansgoooo View Post :
the cost of the replacement caps (and time to fix) exceeds the $10 paid.

i hope the DTA800B1 last longer. we shall see with time.
The newer converter box will be built just as badly, and with some products, there's no way to get reliability except through cheap, easy DIY upgrades.
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Quote from larrymoencurly View Post :
The newer converter box will be built just as badly, and with some products, there's no way to get reliability except through cheap, easy DIY upgrades.
I figured that it was come caps. before i even posted, then when you posted your pic i knew for sure. have you attempted to replace your 4 caps?
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Quote from greenmeansgoooo View Post :
I figured that it was come caps. before i even posted, then when you posted your pic i knew for sure. have you attempted to replace your 4 caps?
I replaced a dozen caps in each box, and the problems with the sound cutting off, the channels changing wildly, and the AC having to be unplugged to get out of standby mode haven't reappeared since.
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Quote from larrymoencurly View Post :
I replaced a dozen caps in each box, and the problems with the sound cutting off, the channels changing wildly, and the AC having to be unplugged to get out of standby mode haven't reappeared since.
i take it you had the caps around or have access to some kind of cap inventory at work?
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Quote from greenmeansgoooo View Post :
i take it you had the caps around or have access to some kind of cap inventory at work?
As always, every part I had in stock was the wrong size, electrically or physically, including the used parts in old equipment, so I had to order almost everything. Frown I just waited until I tallied up the garbage capacitors in every PC, TV, router, and power supply we owned and placed a fairly hefty order for all the needed caps.
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Quote from larrymoencurly View Post :
As always, every part I had in stock was the wrong size, electrically or physically, including the used parts in old equipment, so I had to order almost everything. Frown I just waited until I tallied up the garbage capacitors in every PC, TV, router, and power supply we owned and placed a fairly hefty order for all the needed caps.
i just can't justify spending $10 in caps considering the PoS only cost $10 AC. I will probably try to see if i can fix one of the 2 when the other 800B (not the 800B1) flakes out. Else, i will just scrap some part out of it, like the dual current LED.
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