Collection of mods for Beresford TC-7520

**lingling1337** · 18-07-2009, 13:46

Originally Posted by mantisory

Hey everyone,
So I did the first mod last night, substituting the opamp for the LM4562NA and removing C5/6. I am using a toslink that is pretty long ~25 feet or so.
Before I did the mod, there was always a little popping sound when the first sounds came on, but now it is there every time the song changes...any ideas?
In any case, I may try moving the computer closer and see if that has any effect.
regards,
byron

Try a shorter toslink.

**DaveK** · 18-07-2009, 14:49

Originally Posted by ding-a-ling1337

Try a shorter toslink.

Very constructive post - thanks a lot !!

Cheers,

**lingling1337** · 18-07-2009, 14:59

Originally Posted by DaveC

Very constructive post - thanks a lot !!

Cheers,

I'm absolutely baffled by your ignorance to, or unwillingness to recognize, your hypocrisy here. I try to make a legitimate suggestion to alleviate that user's problem and you reply to me to make a sarcastic comment about how you don't think my post is constructive enough? Just astounding.

**mantisory** · 18-07-2009, 15:05

DaveC, I wouldn't say your post is very contructive at all...pot calling kettle?

**DaveK** · 18-07-2009, 15:08

Originally Posted by ding-a-ingling1337

I'm absolutely baffled by your ignorance to, or unwillingness to recognize, your hypocrisy here. I try to make a legitimate suggestion to alleviate that user's problem and you reply to me to make a sarcastic comment about how you don't think my post is constructive enough? Just astounding.

Chillax sunshine - if you can't take it you shouldn't give it

Pot, kettle, black and glass houses spring to mind.
What else did you think mantisory meant when he posted: -

Originally Posted by mantisory

In any case, I may try moving the computer closer and see if that has any effect.

Cheers,

**Marco** · 18-07-2009, 15:11

Hi Hugh,

Do you think there could be a clue here:

In any case, I may try moving the computer closer and see if that has any effect.

Maybe Byron needs to use a longer than normal Toslink cable, which isn't ideal? I think it was your somewhat curt reply (and stating of the obvious), rather than perhaps giving more thoughtful advice, that prompted Dave's response. I don't think you're doing it on purpose now (since you've been warned), but you do have a rather unfortunate way of expressing yourself sometimes.

Marco.

**mantisory** · 18-07-2009, 15:15

ok...reset - I didn't mean to spark discord

Anyway, to clarify, I am using a long TOSLink cable right now, and I think perhaps this may be an issue..but the problem has really been amplified since I did this mod, although it already existed to some extent previous to that...I never noticed the problem with the 7510 however...
Regards,
Byron

**mantisory** · 20-07-2009, 22:06

hmm..
so the popping did not goaway, and now there is also a loud hissing noise out of the right channel when there is no signal going to the DAC...I hope I didn't fry my tc7520!
b

**StanleyB** · 20-07-2009, 22:14

Is the popping sound from playback via the PC, or is it also from a CD player?
If it is from the PC I remember someone mentioning that the volume level in the audio mixer panel in Windows should be set to something less than 100%.

The noise could be from a suspect opamp. If you rolled opamps, go back to the originals and see if the noise is still there, or if it has gone.

Stan

**mantisory** · 20-07-2009, 22:50

problem solved...partly because one of the caps i clipped was resting underneath the PCB and (possibly) shorting something...partly because the TOSLink cable was really not making a good connection. Took it apart, cleaned it up, put it back and in a better spot, and all is well
regards,
byron

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