Re: RCA RT2770 Reciever (Home Theater?) Need help!
I kinda said it wrong.
I'm newb. :$
anyway, i don't really truely know what the hell it is, but there's lytics and poly films in the same general area of the amps output stage, like right before the inductors around the speaker terminals. The black (sometimes blue depending on models since i have two RT 2770's but different year models) are slightly bulged. The same is true for my other RT 2770. They have been bulged for a while, so I don't know why the receivers are giving me grief....
Wolf_Punch
Member
Last Activity: 01-13-2013, 06:24 PM
Joined: 12-12-2012
Location: Guernsey, Channel Islands
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
Oooh, does that mean I could change the crossover frequency of the sub channel by changing one of the poly films to a higher capacitance, or would that mess with the chip :/, because all the channel are copies of them selves so it probably wouldn't like diversity when it comes to its apperently symetrical channels. It also seems to look like it has a possibly bad input stage (it always freezing).
The 2007 model one I recently bought only has a pesky relay, which apparently, since it's a self powered...Leave a comment:
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
So would it be wise to up the 63v electrolytic 1000uF caps to 100v caps, because the cheapo one's they used are bulging....Leave a comment:
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
It's actually class B, well, at least it says it is.
But do they even do poly film caps at 1000uF? the highest i could find were in the single and double digit uF range. :S. and I'm not gonna build sloppy cap banks that'll have to be on there own bread boards.
Wait, R U talking about the Dolby section? because it is possible to replace some of the caps their that are 1uF or 2.2 uF. in that case yes. But the final stage amplifier electrolytics would be an absolute pain to replace with...Leave a comment:
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
they are slightly bulged, hence the reason I'm thinking about replacing them with same capacitance electrolytics at a higher voltage (100v instead of 63v) and a higher max. operating temperature (105*C instead of 85*C). It may sound a bit over the top, but the added protection helps when blasting music
.
So, anyway, you think I should just put new thermal grease on it? It sounds gritty when you start playing music without it being warm in the first place, hence the reason i might upgrade the caps...Leave a comment:
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
Ooooooh.... *idea
would a wire wound resistor of that resistance be a good idea for it's more efficiant cooling, I could heatsink to the case, no?...Leave a comment:
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
That perfectly fine I was using a 8 Ohm sub already with my old receiver (another Rt 2770 but a 2009 model).
Btw, did you happen to have any mildly burnt and possibly fried voltage regulators in the Dolby/Input section of the amp, because my old one (The 2009 one) is has that problem, I wonder if that mainly what's causing the minuscule grit and lack of dynamics along with the bulging caps here and there, more noticeably the one's on the Final stages of the amp?...Leave a comment:
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
Oh, and another question, did this happen to anyone else?
There are some chips on my other RT 2770 (a 2009 model, well, at least the power board seem to be) in the dolby section and I believe they are voltage regulators, might that be another one of the causes of poor dynamics in the music being outputed? The chips have burn marks on the top of the pcb but not in it, maybe the resin from the solder on the tiny little heat sink caught but I can't tell if the chip is fried a half of it is buried under that tiny tab...Leave a comment:
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
So it not the fact the diode it a puny, underated component? because this has happened to alot of ppl that have this model....Leave a comment:
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
Oh and I forgot to mention I live in bahamas and the U.S, though I still am from Guernsey, Channel Islands, U.K
sry for the confusion
...
Leave a comment:
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
I don't know all these formulas. :S I am a n00b.
Bur, I can tell you that I drive my speakers quite strongly usually, so wouldn't (for the sake of the amp) a high resistance be appropriete?
I was already getting some static noise from the speakers evan on volume level 1 without the sub (I can't get that sub working as I don't have the switch/button to complete the relay circuit thing that is reffered to as "subwoofer control" (that's another story)
Ah... progress......Leave a comment:
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
I may be a novice but I no what a snubber is.
Anyway I have a whopper 8.2 Ohm resistor on my other RT 2770 (bare in mind it's got a different lay out
). Would that work in place of the burnt one of the other board?
It in the same basic area that the burnt resistor on the other board is right by the 3-pin heat sink mounted diode.
OH, and fyi, my board still works (Well probably not now since the resistor wiggled free of it's soldered terminal) but that slightly burnt resistor...Leave a comment:
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Re: RCA RT2770 Reciever (Home Theater?) Need help!
Dude, that's like the same resistor that is burnt on mine, though mine still works, oddly.
I can't tell the bands on it eighther because it burnt a little too.
Oh, and another thing? How do I get this stupid subwoofer output to switch on?
I don't have the stupid sub control button and the relay that controls it is switched off
why, oh, why?...Leave a comment:
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