Just a quick question about the speaker relays.
I have this receiver that doesn't have any speaker output.
I have cut open the relays (taken the blue covers off) because I could hear them clicking on and off so I thought the relays were on their way out.
When I manually turn the relays on there is sound from the speakers.
My problem is finding replacement relays (3 of them) for a good price. I have seen them as low as $8 each, and as high as $12 + shipping.
The original number on the relays are as follows....
OEG brand...
the loner
Senior Member
Last Activity: 09-20-2014, 03:41 PM
Joined: 02-22-2013
Location: Belle Ewart, Ontario
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Sony STR-DE875 optional/compatable speaker relays
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Re: Samsung AV-R720 won't power up properly
Thanks Pragmatiko. I do have the files that you posted
I have replaced the 3 CapXon caps,(tom66)but it still does not work properly. I have stand by light when plugged in, I have a blue power light when I press the power button, but there is no display and the voltage readings are totally off. (They do not match what was printed on the power supply board)
I still hear that buzzing/popping/crackling sound so I'm going to further troubleshoot this receiver. -
Re: Samsung AV-R720 won't power up properly
tom66, I know that all the caps are crappy on this power supply, but the readings don't look that bad, do they? (I'm no expert, just learning the basics right now, so I'm not disagreeing with you in any way, no disrespect)
How about these pictures. I did not see this before, but I got out my magnifying glass out and I noticed that 1 leg of the transformer is not even soldered to the board. It looks like it has broken off.
The picture is not the greatest, but if you look from left to right, the 3rd hole, the...Leave a comment:
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Re: Samsung AV-R720 won't power up properly
I have had time to test some of the caps on the power supply board and they all seem to be within specs. Pictures are below.
I know that the tester that I have is not the greatest, but it gives me some indication of the condition of the caps tested.
I still think that there is something wrong with the high voltage transformer.
The voltages are not right.
...
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Re: Samsung AV-R720 won't power up properly
I can't send the service manual, it's too big and I don't know how to zip it smaller, 38mb file
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Re: Samsung AV-R720 won't power up properly
I have the service manual, so I'm going to check out the troubleshooting section.
Maybe I can figure this one out.
I don't have an oscilloscope so I hope that I can do these tests with a digital multi meter.Leave a comment:
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Re: Samsung AV-R720 won't power up properly
Can anyone help me on this one. I don't like playing with high voltage transformers.
If it's not the transformer, then I don't know what it might be.
Also, the power will not shut off when I try to power it off with the power button, I have to actually unplug it to go off.Leave a comment:
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Re: Sony STR-DH820 not powering up
Sorry for not getting back sooner to everyone, it's been a busy week. Reinstalling windows 7, helping a friend move.
I plan to order that relay this week and try the "dead bugging" you mentioned rhomanski.
Not sure if there are any other Canadians in this posting (it doesn't look like it), but Digikey also has the relay that you mentioned rhomanski,
[url]http://www.digikey.ca/product-search/en?lang=en&site=ca&KeyWords=ALQ305&x=18&y=13[/url]
I do appreciate the help everyone...Leave a comment:
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Samsung AV-R720 won't power up properly
I have a Samsung av-r720 that will not turn on properly.
It has stand by power when connected to power, but when I push the power button, I hear a crackling/buzzing noise, or possibly a short in the high voltage transformer, the power light goes blue, but I have no display.
I think the big transformer in the middle of the first picture is the problem.
These are the voltages of the white plug on the left side, plugged in, in standby mode...
Pin 1 -
Pin 2 Gnd
Pin 3-4 .7mv .7mv
Pin 5-6 2.6mv 2.6mv
Pin 7-8 D_Gnd
Pin 9 5.56v... -
Re: Sony STR-DH820 not powering up
I did see that website, but I wasn't sure if the specifications were ok to use that relay.
[url]http://www.onlinecomponents.com/te-connectivity-p-b-brand-sdt-s-105dmr,000.html?p=12114038[/url]Re: Sony STR-DH820 not powering up<b...12114038[/url]Leave a comment:
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Re: Sony STR-DH820 not powering up
All 3 relay's are physically the same, as in pin layout and dimension, just the internals are different, as in current draw, and resistance.
SDT-S-105LMR2,000 5VDC Sensitive 150mW coil 8-1419125-3 or
SDT-S-105DMR,000 5VDC standard coil 8-1419125-0 or
SDT-S-105LMR,000 5VDC Sensitive new design AgSnO2 1 form A (NO) 250mW 8-1419125-1
I'm not sure what the coil type means on the last page of the pdf file stands for though.Leave a comment:
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Re: Sony STR-DH820 not powering up
So if I understand correctly, this relay, SDT-S-105DMR,000 5VDC standard coil
(part #8-1419125-0) is fine, since the voltage is the same, it has less coil resistance
(46.3 ohms vs 100 ohms) , and it can handle more current (540 mW vs 250 mW)Leave a comment:
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Re: Sony STR-DH820 not powering up
The original relay # is SDT-S-105DMR2. I put the pdf sheet there for everyone's reference if they would like to see it to compare.
5V Rated voltage VDC,
3.75 Operate voltage,
0.5v release voltage,
100 ohm resistance +- 10%
250 mW Rated coil power.
I have read the coil resistance and rated coil power are different, but I don't know if it will cause any damage if I use a different value, because it is working nicely right now.Leave a comment:
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Re: Sony STR-DH820 not powering up
I hope that I don't get into any trouble posting the relay data sheet but here it is......Leave a comment:
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Re: Sony STR-DH820 not powering up
Thanks rhomanski, the relay is the problem. I sanded the contacts and it works a lot better, I just need it to work 100% as it will be given to my father in law as a present.
I just need to source out a relay now.
If I can't find a direct replacement relay, can I use one of these as a substitute...
SDT-S-105LMR2,000 5VDC Sensitive 150mW coil 8-1419125-3 or
SDT-S-105DMR,000 5VDC standard coil 8-1419125-0 or
SDT-S-105LMR,000 5VDC Sensitive new design AgSnO2 1 form A (NO) 250mW 8-1419125-1
Either I'm not looking...Leave a comment:
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Re: Sony STR-DH820 not powering up
Thanks budm. I do get 115.9v when connected properly as you stated.
I have the service manual also.
I just don't know what to check as the amp will turn on after about 20 un plugs and re plugs to get it to come on, it's a guessing game and the luck of the draw when it comes on.
When it does work and I shut it off, then try to turn it back on again, I go through the same process of un plugging and re plugging it in....Leave a comment:
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Sony STR-DH820 not powering up
I have purchased this AV amp, (along with 3 others, but I want to work on 1 maybe 2 at a time) from an auction for cheap, $40 for 4 of them.
When I plug in the amp, I can hear the relay click on to energize it(it is a Tyco Electronics SDT-S-105DMR2).
If I unplug and re plug it back in, after about 20 or so times, it will power on
.
When it does power on, I get sound from the 2 speakers that I connected to it, I haven't plugged in all 7 speakers in because I'm trying to get it to work.
I have a feeling that it maybe the relay being weak, or maybe a cap that... -
Re: VIZIO VO42L fhdtv10a No picture again.
Just to update the problem I had with the tv, (yes I know it has been a long time since I have been back) but I have installed the correct inverter cards into the tv and everything works like new again.
Thanks to everyone for the help and info.
Now it's time to start another project that I need help with.Leave a comment:
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Re: VIZIO VO42L fhdtv10a No picture again.
Just a quick update for everyone who is interested. I did not get my money back and the seller has stopped responding to my messages now. I have stepped it up and now have the credit card company involved.
They have suggested to send back the defective/wrong/incompatible cards to the seller, only problem is that I threw out the package with the address.
Oh well, its a call to DHL on monday and see if I can get the address from them off of the waybill. Funny, now that I think about it, I don't remember having an invoice...Leave a comment:
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Re: VIZIO VO42L fhdtv10a No picture again.
Well, that's nice. Spent $100 for nothing. (I'm not mad or upset at you budm, just tired of being lied to)
I really appreciate everything that you and Dgtech have done for me.
Well, I guess I'm on the war path now to get my money back and order the correct boards, not something that may be compatible.
Thanks for all your help.Leave a comment:
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