Re: Creative Gigaworks S750
just wondering if anybody knows of the best compound for ultrasonic washer, I remember some bluish powder from old times, would flux off as a charm and was diluted with water - unlike laquer thinner which you would have to use a lot... rubbing alcohol does not work on any kester rosin flux
jnzz001
Member
Last Activity: 07-08-2015, 04:28 AM
Joined: 05-06-2014
Location: Chicago, IL
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Re: Creative Gigaworks S750
Thank you!
Just wondering about heatsink temperature - I just finished testing it and will be applying the silicone, I noticed the heatsink is pretty hot - may hold a finger to it for a second or two. I guess that would be in the 70 C degree range. Is that normal only after playing a song and not very loud? I can tell it's hotter on the end where 68uF/470V single big cap is so the transistor (?) behind it. The system was on for many hours though, just idle.
??Leave a comment:
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Re: Creative Gigaworks S750
well... my glue came off mostly with film - much copper exposed
never mindLeave a comment:
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Re: Creative Gigaworks S750
Well, that's ez - got plenty of HQ 3M silicones, how about removing the glue - that's chemical or just mechanical stripping and what did you use???Leave a comment:
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Re: Creative Gigaworks S750
and these other boards, glue and caps just look atrocious...
should I be worried or not just yet?Leave a comment:
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Re: Creative Gigaworks S750
Thank you!
I just booted them with new parts and so far so good.
What I suspect is that a pad (positive one on one of 4 big caps) was hanging in the air or barely connecting.
I was soldering them 1 at a time now and checking connections - the first one was fail and I just had to offset them all and solder from another side (had to leave like 2mm between the cap and the board)
All seems dandy so knocking on wood. just have NO CLUE what GLUE to use... any 2 comp epoxy good?
Thanks...Leave a comment:
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Re: Creative Gigaworks S750
wow, what did you use to remove the glue so nicely? My pcb is stripped of silkscreen mask in many places under these capsLeave a comment:
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Re: Creative Gigaworks S750
hmm, yes - all caps on this board, the holes are in a poor shape though, yes.
Will take a look, thanks.Leave a comment:
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Re: Creative Gigaworks S750
Hell, did not think of that but I think I waited a few days. I think I will just give it one more go once the parts arrive. This glue gave me headaches...Leave a comment:
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Re: Creative Gigaworks S750
They sat in my garage unused since maybe 2007 when they went bad - after a few seconds they would stop playing and just output some distortions at sound peaks at high volume...
I finally got to fixing it - replaced all PSU capacitors with mostly OK stuff - the 4 big ones were SAMXON because I did not really want to pay much more... the rest mostly Japan, Elna Re3 etc. The thing system worked for some good 15 minutes. The only weird thing was after powering off I could hear the relay clicking 1 or 2 too many times... I actually washed the whole...Leave a comment:
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Re: Creative Gigaworks S750
I have replaced all caps on PSU board and it worked as a charm - but only for a while. I think I could hear the relay switching a few times after powering the unit off from the control box. Either way it worked fine then while playing something i could hear a BANG and no more music.
After opening it and diagnosing a piece of Q4 mosfet was blown away, R30 was burnt and D24 (15V zener) was short. Also another switching diode D15 was short - both in S1 circuit...
everything else seems fine...
Any idea if something...Leave a comment:
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