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Turnip:
Hi Davy,
As the two O/P chips are microscopic SMD - Wouldn't care try change any. Those four caps are bad enough as 1mm x 0.25mm - Bit small.
Recall got a bag of 100 and most flew away. Don't know what they die from, just change 'em, seems to work if you don't duff up the print.
Guess SG Brown the biz though suspect the diaphragm dubious for Hi-Fi - Bit like the Carbon granules on old BT phones.
Recall way back used two Heinz beans cans and a length of taught string.
Best of luck with your BGA work - Chris.
Davy:
Hi Turnip, Happy New Year to all, before I forget.
1mm x 0.25mm you say that would be either 0402 or 0603 size, thought they looked to be about 0805/1206 size, not taken em' out yet so haven't measured them, at moment the telly is boxed up.
I keep eyeing a Quick Hot air station, here's a review.
https://www.eevblog.com/2018/02/20/eevblog-1058-quick-861dw-hot-air-rework-station-review/.... I'm very tempted.
I could 'try' and lob some Mylar caps in, they should do the same job, it's only a snubber.... the speakers do look crap to me so not expecting much here.
Dave
Turnip:
Hi Davy,
Use an Aoyue Int 853 myself at around 80 Quid - Cheap and cheerful, plus a blast of heat from above. As to the caps, guess I bought the small ones, sort'a 100 for a quid from China.
Had the thought to use soldering tweezers, but the cheap Chinese ones were crap - The ends didn't meet and they glowed Red within minutes. Sorted quite a few with solder mop and a single iron, mind you, had some print issues, but not yet a failure.
Would have used the rework station - Great for T/con issues - but that Vestel board is closely packed in that area - Chris.
Davy:
--- Quote from: Davy on January 07, 2019,07:48:32 ---Hi Turnip, Happy New Year to all, before I forget.
1mm x 0.25mm you say that would be either 0402 or 0603 size, thought they looked to be about 0805/1206 size, not taken em' out yet so haven't measured them, at moment the telly is boxed up.
I keep eyeing a Quick Hot air station, here's a review.
https://www.eevblog.com/2018/02/20/eevblog-1058-quick-861dw-hot-air-rework-station-review/.... I'm very tempted.
I could 'try' and lob some Mylar caps in, they should do the same job, it's only a snubber.... the speakers do look crap to me so not expecting much here.
Dave
--- End quote ---
--- Quote from: Turnip on January 07, 2019,12:27:02 ---Hi Davy,
........ Had the thought to use soldering tweezers, but the cheap Chinese ones were crap - The ends didn't meet and they glowed Red within minutes.
--- End quote ---
I was looking at tweezers myself and thought, two soldering irons will do the job... I seem do the job with my Ersa i-con 1 with the right tip, but once removed the components a 'goner' usually due to heat.
That's reason I'm not going for a cheapo hot air station, so much crap knocking around.... nearly bought an Atten soldering station but one review showed only three wires to the iron part. ground and power feed. The way it regulated was it monitored the element current through a low value resistance, RS Components tech department actually confirmed this to me.... so many complaints of poor regulation due to tip cooling down on contact.... guess that could cause 'track ripping' when using de-soldering braid.... the Ersa i-con iron looks ridiculous with a 10mm tip...!
The very reason if I get anything like this I prefer to buy one and once only, meaning buy a good one and have done, been 'had' before with junk.
Would I be right in thinking you can't control the heating area with a hot plate? A cooker element with thyristor/triac control or even a variac with a ceramic plate over the element.... a couple of 100W metal clad resistors even should work, should be alright for egg and bacon butties too.
Dave
astracat:
hi have you reset back to first time installation in menu have read few people with no sound have cured by this
regards
astracat
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