Weekday LIVE : Sony ICF-SW77 capacitor replacement

www.youtube.com/@Radiocrunche... Next in my long queue of repairs is this Sony ICF-SW77. I reviewed it back last June. Its in for a recap so about time i got to it. Grab a cuppa and join me in live chat for more radio fun. See you there / radiocruncher
www.paypal.com/paypalme/radio...

[@sundarAKintelart]

Nice.
I happened to watch this video also.

[@Radiocruncher]

Great radios when they are sorted

[@KrissDucky95]

Hello and congratulations for your work and patience
Especially since I know the problem and the risk of tearing the motherboard.
I wanted to ask you what is the liquid that you put on the solder points before setting up the capacitor. Finally, I regret not having seen the final result of the reception of the waves after repair in the video. thanks anyway

[@Radiocruncher]

Thanks. I believe I did demonstrate it in a later video. The liquid I used was flux. Here's the link cpc.farnell.com/warton/315-0-5l-bottle/315-noclean-flux-1-2-litre/dp/SD00085?mckv=s_dc|pcrid|605262956863|kword||match||plid||slid||product|SD00085|pgrid|138313689055|ptaid|pla-1732003759345|&CMP=KNC-GUK-CPC-SHOPPING-9262013734-138313689055-SD00085&s_kwcid=AL!5616!3!605262956863!!!network}!1732003759345!&gclid=Cj0KCQjwx5qoBhDyARIsAPbMagBxzylo-bIsNoRJ7sf7S8Caan9Xw3T7EOGG1r392s7uVfm2u6qVYRIaAjrmEALw_wcB

[@gonzaloandrescuervo278]

Hola Amigo, tengo un radio igual y tiene un problema actualmente, cuando toco el comando para aumentar o bajarle el volumen suena distorcionado, como con interferencia. cual puede ser el problema para solucionarlo. Vivo en Colombia, y e acá no sé donde lo pueden arreglar.

[@ismailbasaran4020]

❤

[@NsndoBrasil]

Parabens pelo trabalho amigo. Jhon SP/SP Br

[@Radiocruncher]

Thank you

[@AstonsVintageTechnologyWorkshp]

The Sony ICF-SW77 is a smashing radio. Shame about the caps. Still, at the time nobody knew they wouldn't last, due to the improper chemical used back then. :-)

[@Radiocruncher]

Hi Aston. Yes these caps seem to all go bad. I am thinking of doing one with tantalums soon so I will be asking your advice. Thanks for watching. Cheers Graham

[@mikewillis1592]

Interesting. What I didn't understand about this is why is it necessary to change the capacitors as they would seem to be fairly modern and if it is Sony I would expect they use high quality ones that don't tend to go bad.

[@Radiocruncher]

Hi Mike. These early smd electrolytics are very prone to leaking. If left in they will damage the board. I tested some in situ and they were pretty bad. Luckily I got to them in time and there was no damage to the board

[@gibasabino22]

Hello, i have 2, and changed the capacitors, but one of them has a muffled sound in the medium wave! Do you know what could be happening? Thanks

[@Radiocruncher]

Hi. It’s likely that there’s board damage depending on how much corrosion there was. Check the voltages in the AM circuit. Check all the vias for continuity. It’s possible that the trimmer capacitors may have got contaminated so got through the IF adjustment process for medium wave

[@jffhfet2992]

عندي راديو سوني sw77 توقف عن العمل هادا الاسبوع اصبح لا يستقبل الاداعات كان شغال بالنسبة fm وam مكنش شغال الأن يعطي ضجة فقط هل يحتاج مكتفات وأين يمكن أن اجدهم

[@Radiocruncher]

I suspect the capacitors are leaking. Have they been replaced before?

[@DJTonyCMP3]

Mr Carlson way of removing I’ve been using since I’ve seen him doing it. I’ve seen all his video’s but at the moment he’s not doing very much🥲 the flux your using is it the sticky one ?

[@Radiocruncher]

Hi Anthony. Mr Carlson is one of my favourite channels. I was a bit sceptical at first but the method seems quick and trouble free. I use the gel type flux which is sticky although I use another one which is a liquid that works well

[@zx8401ztv]

I spy the sony chip that looks like the one in the tecsun radio.
But sony made the propper one :-D

[@Radiocruncher]

Hi Harvey. Yes I thought that might be the same chip but it’s only 30 pin and the Tecsun is 32

[@zx8401ztv]

@@Radiocruncher But there are two pins that appear to do nothing.
My mate had a similar no station fault on his 660 no 88 to 108 band, after i checked the f.m vco and i.f strip for mixer injection operation, i cleaned the crud off around the pll chip and that helped no end. (its a pll thats common to all bands)
The ribbon from the main board to controller is very dodgy, i found a crack in it on one of the ribbon tracks.
The multi detector chip is tiny on this set.
Sorry waffle mode :-(

[@Radiocruncher]

Thanks for the info Harvey. I will revisit the PL660 at some stage as I’d like to get it going

[@tn7579]

Why the small screen with your face? Have seen you on the beginning, it's enough

[@Radiocruncher]

Sorry to disappoint. Hopefully the video was useful