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Post by jp56 on Sept 6, 2015 16:11:59 GMT
Hello ,
i have seen that Colin 14 explain the clicks but i don't understand what he say!
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Post by jp56 on Sept 14, 2015 11:19:43 GMT
Hello ,
there is how many relay in the SPM 1200 E because the clicks are like the noise of the relay and it is like there is several relay ?
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Post by MartinT on Sept 15, 2015 5:47:25 GMT
I don't know for sure, JP, I think only the speaker protection relays for A & B circuits.
You could try cleaning (exercising) the A/B buttons in case there is an intermittent contact?
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Post by jp56 on Sept 16, 2015 3:15:26 GMT
Thank you very much MartinT ,
what kjnd of product i must use to clean ?
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Post by MartinT on Sept 16, 2015 6:27:33 GMT
Try cleaning the contacts 'dry' by just exercising them in and out. Otherwise you will need to disassemble and use a tiny amount of contact cleaner. I use Deoxit. Cleaning the relay contacts will be tough but you can usually open them up with some care.
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Post by jp56 on Sept 16, 2015 9:03:10 GMT
Thank you very much MartinT
but it is necessairy to open the SPM 1200 E ?
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Post by jp56 on Sept 16, 2015 12:17:55 GMT
Somebody say me about the relay " your offset is not good "
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Post by jp56 on Sept 16, 2015 12:26:41 GMT
Hello Colin14
i don't understand what you explain about the clicks ?
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Post by MartinT on Sept 16, 2015 12:33:56 GMT
Yes, you would have to open the Chord to get at the switches and relays.
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Post by jp56 on Sept 16, 2015 12:56:19 GMT
Thank you ,
but it is difficult ,
if the offset is not good is it bad for the unit
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Post by jp56 on Sept 16, 2015 16:31:33 GMT
i am afraid by the offset if this one is not good but i think the SPM 1200 E is very good protect , somebody say me that a bad offset is not good for the loudspeakers and the unit ?
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Post by MartinT on Sept 16, 2015 17:06:41 GMT
I guess they mean DC offset at the terminals? I really think you should ship it back to Chord for inspection, JP. It clearly makes you unhappy and I don't think anyone here can solve it for you.
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Post by jp56 on Sept 16, 2015 17:23:04 GMT
Thank you ,
i don't what to do .
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Post by jp56 on Sept 17, 2015 3:27:16 GMT
it is not DC offset at the terminal , it is only inside the unit ,
Chord said to Pinkie it is only mecanichal and i must don't worry with that , the noises don't more.
JP
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Post by MartinT on Sept 17, 2015 7:12:06 GMT
For your peace of mind, ship it back to Chord would be my recommendation. Otherwise you will keep worrying about it  |
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Deleted
Deleted Member
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Post by Deleted on Sept 18, 2015 20:16:28 GMT
Sorry JP56, As the Flyback converter is often used in standby and or low power , it is run in burst mode, so instead of running continuous current mode in the primary it is energized in bursts. This causes the core to attract like a electromagnet, and since all Flybacks have to have a air gap in the core and packing to keep the cores apart you get a clicking sound.
Flyback normally need a load min of 5% - 10% to do this clicking but some are designed this way to reduce power. i.e. under 1W
The reason you can't shut it down more is due to min ON time of the power device/FET etc and since most modern Flyback have a max on time of 2uS so 200nS is close to the FET ON Time include delay on/off time.
So click click you have.
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Post by jp56 on Oct 17, 2015 16:11:21 GMT
Hello everybody ,
from several days i have no cliks not at all ,
that depend how i push on on ,
i have the clicks ot dilatation but it is normal .
i am happy .
jp
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Post by ChrisB on Oct 17, 2015 16:31:07 GMT
Good news JP, I'm glad you finally came to a satisfactory conclusion with this.
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Post by MartinT on Oct 17, 2015 16:52:18 GMT
Great news!
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Post by jp56 on Oct 19, 2015 13:30:50 GMT
Hello ,
always no noise .
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