Sony ICF SW77 capacitor replacement. Part 1
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- เผยแพร่เมื่อ 30 ต.ค. 2018
- In this video I go over the operation of the Sony ICF-SW77 and check its functions. The owner has asked me to replace the SMD electrolytic capacitors. I have never done this before so join along as I learn on the job!
- วิทยาศาสตร์และเทคโนโลยี
Sony alway built a stylish radio. It’s nice to see people still appreciate a nice radio and are willing to spend something to get it repaired.
I agree Chris. They are well worth repairing and do have a good following within the SWL community. Thanks for watching
Oh yes, those surface mount cans are a plague. Even in the high end Sony gear, working on a V-21 right now with the same issue. Good job at finding the trouble.
Thanks Buddy. I was lucky that they hadn’t ruined the board. I have another one here waiting for the same treatment
Don 't pull the flexcable , just open the connector.
You love a Sony, and Sony loves you! 👍
I don't love them that much! This one was kind to me though
Nice job mate big thumbs up
Thanks Allan
Had to use the twist off method on my SW1. First, I refused to do it that way, but I couldn't get them off with a soldering iron.
It’s scary but does seem to work well with these boards
Great Work
Thanks Tariq
Those rotary encoders are often intermittent. Give it a blast with air cleaner often fixes them.
Hi Simon. It had gone all floppy and loose. Needed replacing really but I couldn’t find one anywhere. The owner seems used to it but if you know where I could get one I’m sure he would have it done. Thanks for watching
I found the rotary encoder shaft was not securely gripping the external jog shuttle dial ...like you I had to push down to jog step the frequency -- dismantle and gently spread the encoder shaft splines ( if thats the term ) I would be wary if of spraying anything that leaves a residual having seen inside the encoder
SMT...yikes! Can't beat a meaty capacity to grab both hands around. Lovely radios, I wish the later 7600 had the rotary dial. Regards _ Andrew
Hi Andrew. It makes you appreciate good old through hole caps on single sided boards! It’s a very nice radio. I did get used to the caps in the end so look out for part 2. Thanks for watching
@@Radiocruncher How to set to AM at 10khz at 10hkz and Sw 5kHz at 5kHz
Hi Sir ! I watch all your videos on TH-cam... I am basically an Radio collector of SONY brands only... I have got an amazing working condition SONY ICF SW55 📻 Radio... I have recently only bought an second one SONY ICF SW77 I am facing an big two problems in it... the Arrow marking two buttons above the JOG Dialing Cursor doesn't work neither the Jog dial is working i mean the manual jog dial tuning has stop working only.. rest as usually 😉 Sony SMD Aluminum Capacitor issue are weaker an the sound is almost around to nothing only... so my Question to you is sir .... >>>> Does all this weak Capacitors affects the Jog dial circle button not to work ... an those arrow buttons too stop working...
Hi Amit. Bad capacitors will affect the voltages throughout the radio so could be the cause of your buttons and encoder not working properly. The encoder could of course be worn out but unless it’s seen a lot of hours this is unlikely. The capacitors can also leak electrolyte which can corrode the board and also get into the vias so it’s important that you check this out as well. Good luck Graham
The encoder on my ATS909X is not optical, oddly they changed from the optical one in the older ATS909 and introduced problems by using switches.
It’s very woolly on that SW77. I have another one here that’s fine so it definitely needs a new encoder
Using only the external 6V supply I am able to listen only through the Earphones and with the built in speakers. What could be the fault ? Should RC 14 batteries also be used along with the Ext supply ?
Hi Naresh. The majority of faults with these are caused by leaking smd electrolytic capacitors. Have they been changed?
My Dad has this radio model, but it does not work on AM Shortwave. FM works though. Any ideas what the problem might be? Thanks
Most likely its the SMD capacitors
@@Radiocruncher Thanks for the advice, appreciated 👍
Would a hot air blower work ,I have one on my 898D rework station from eBay, it's kinda made for smd stuff ,I would think it would remove those ?
Hi Ron. I could do with a rework station really. I’m not sure whether it would melt the plastic base though. Thanks for watching
@@Radiocruncher How to set to AM at 10khz at 10hkz and Sw 5kHz at 5kHz
Hello .
I follow your work with appreciation.
Do your videos always leaner shots.
Doing real intimate lean work in your videos.
My advice is to first remove all the smd capacitors in the pc circuit
Then isopropyl alcohol clear the pc card.
Change the capacitor inside the dc -dc converter box. don't forget (22uf 6,3v).
Remove all SMD aluminum capacitors
Fit the SMD tantalum capacitor instead of all SMD aluminum capacitors.
Both in terms of life span and capacitor leakage.
at least 50 years working smoothly. (LIFETIME WARRANTY)
(1uf.,22uf,47uf,6,8uf,(100uf 4v),(220uf 4v) =3528 B Tipi SMD )
(100uf ,220uf 10v =6032 C Tipi SMD OR 3528 B Tipi SMD )
(470uf= tantalum= 7343 E Tipi SMD OR D TİPİ)
Please don't install smd aluminum capacitor again.?
Pc circuit board does not remove a second repair.
I have changed all radios to tantalum capacitors as a sony collector
if you are working with your sony radios sw77.sw55 tell them to everyone immediately attach tantalum capacitor.
Replace your radio without malfunction.
So far, I did numerous, sony icf pro80, sw55.sw77 radio repair.
Smd aluminum capacitors doing major destruction in pc circuit.
DO NOT USE IN SONY RADIOS.
Pc circuit saw radios in very very bad condition.
Smd tantalum capacitor is very easy to disconnect and remove
I only recommend to you.
ultimately, labor costs money.
Smd aluminum capacitors only, tweezers and crow-nose penseyle removed.
Fİx the tweezers under the aluminum rubber gasket and make it to the right with pliers.
Other than the large capacitor only end, other small capacitors tweezers with the method of pliers removed.
Takes no more than 5 minutes disassembly.
No one wants to share information on this site.
I have repaired many sony radios with this method.
Clear isopropyl alcohol after removing smd capacitors
Do not try because of the large capacitor pliers method.(pc board removes paths)
Do not exceed 320 degrees with hot air.(would not recommend.)
very unpleasant smell coming out.
is not my own link, it is for information only.
Pdf file is for those who do not.
The poles of the SMD capacitors plus the negative direction.
Blue dots plus direction shows
3.bp.blogspot.com/--uymcZ6ijyI/VASWSrfgkHI/AAAAAAAAA80/UwJwWPEuSZA/s1600/smdelko_position_value_sony_icfsw77.JPG
I wish you success in your work.
Thanks you very much for your comprehensive comment. I have heard of upgrading to all tantalum SMD caps but have never tried it. I will give it a go on my next SW77 repair and see how I get on. I’m not totally sure on what you mean for removal of the old capacitors. Regards Graham
Remove all old SMD capacitors from the circuit.
on the circuit, remove all working capacitors.
Replace from scratch again.
The problem is not solved when you replace faulty capsents only.
the exact solution, replace all the old capacitors.
my advice to you is definitely to use tantalum capacitor
Can those faulty 24 capacitor make the Jog dial not to work sir ??? Anyone from this group please reply to me... ??? My Arrow scan keys are not working... An the sound is very low like 5% only on full volume... So what has made my those Jog dial not to work... ??? Please reply ...
Can those faulty 24 capacitor make the Jog dial not to work sir ??? Anyone from this group please reply to me... ??? My Arrow scan keys are not working... An the sound is very low like 5% only on full volume... So what has made my those Jog dial not to work... ??? Please reply ...
I have one issue again with my ICF Sw77. The volume starts at low and adjustable from low to high normally. After few hours running the radio with low volume, suddenly its low volume became loud. And if I increase it, it became even super louder. Anyone know what's the issue? Thank you though
Hi Andre. I’ve not had that issue before. You would need to go through the output stage with a scope to see where the issue is.
Great neat and tidy work , looks a bit fiddly to do
Thanks Shaun. It seems the more radios I do the more fiddly they get
Good job.The radio circuit is clean to your luck.
These SMD capacitors are a complete nuisance.
Thanks. I was lucky that the electrolytics hadn’t leaked onto the board. They are a pain to change but the more I do the easier it gets. Thanks for watching
@@Radiocruncher yes even it felt me harder to change those 3 big one in that of 470uf an 16v... one of my PCB tracing got Out from the board but I got it dont by soldering on it... thanks to MECHANIC flux... as I gone ahead with 4 to 5 caps it was easier for me to replace those all of them... I used two Soldering iron technic to remove those Caps...an placing lots of flux before removing them... they come out easily than... 🙏🙏🙏🙏
My unit doesn't hold the data after the batteries are removed, I guess I have to change the supercaps, although I checked the prismatic supercap and it held the charge for hours. But I didn't test the cylindrical supercap, which is mounted on the LCD board. Does it have to be a 6.3V type ?
Hi Dorf. The supercap is sat on a 6v rail so I would assume you would need the 6.3v cap as fitted. I think I may have one here but they are still available from Mouser. I didn’t fit one in this radio as the existing one was okay but I have done one since that which I did replace it in as it was corroded
@@Radiocruncher Hello, there is a seller on ebay, but the caps aren't fresh.
EDIT : I did measurements, on batteries (6V), C818 has ≈5.81V (off) and 5.56-5.62V (on). With the AC power adapter it is 6.36V (off) and 6.27V (on).
[After removing a battery the voltage breaks down immediately.]
So yes, a 6.3V supercap is mandatory.
And yes, the schematic was right with 5.8V on the plus rail (C818). ;)
Mouser is the best bet then unless you have a seller over there that has stock
@@Radiocruncher Mouser and Digikey is like 20-22€ for shipping. :)
The shipping is free with a minimum order. It would be worth ordering a few in and then stocking up on capacitors and consumables to get it over the minimum order threshold. If that isn’t possible then drop me an email graham@radiocruncher.com and I will see what I can do
I have grabbed them caps and push it up along the soldering line and they have popped right off...without hurting the trace.
Stay tuned for part 2 Kenny. Thanks for watching
Hi guys, I have Sony ICF SW55, all SW LW AM work just fine. Once it goes to FM mode the radio goes to silent, and the FM frequency can't be changed at default FM 76.00 and in another few seconds it shuts off by itself. Do you know why the issue is? Is it because of bad capacitors? Thank you so much
Hi Andre. The capacitors in these will be bad by now if they haven’t been changed. I suspect the ones in the FM section will have stopped it working. If left too long then the board will get damaged by leaking electrolyte
@@Radiocruncher thank you for your reply. Sorry late reply.
I have sony 7600G problem in medium wave which is not working properly some channels are comming some are not. What could the problem
Most likely capacitors
Thanks Allot bro
I have an Sony ICF SW77 Radio ... sir its Jog dial tuning round circle button and those Arrow left right Spanning keys are also not working.... is not working and have just replaced the SMD Electrolytic caps with Panasonic original 24 Capacitors ... but now volume is full like new all stations are coming... but still the Jog Dial round dial is not working why so ???? ... should I need to replace the Super Capacitor round shape too for it... ??? 0.22uf an 5.5v super Capacitor beneath the Keypad pcd board hidden below that 2 pcb boards .... ???? Please reply 🙏 ... sir
Hi Amit. Well done on restoring the audio. Did you change the capacitor C704 in the DC-DC converter (inside the metal can)? It sounds like the rotary encoder is either worn or dirty. It’s worth checking the wires from it and the connector to the main board for continuity first though. I’ve not replaced or taken an encoder apart in one of these though but worth taking it apart if all else fails. The keys are activated by carbon pads on the back of the rubber membrane. If liquid has leaked into it then it might not be making proper contact. Take the membrane off and *gently* clean the contacts on the board and the carbon pads with isopropyl alcohol. Be very careful not to remove too much carbon doing this as it will ruin the contacts. I would certainly change the super capacitor. It’s responsible for holding the memories and may interfere with the controls if it’s dead. It’s 0.047F 6.3v. The only stockist I’ve found is Mouser electronics. Good luck
@@Radiocruncher hi sir ... can I use 0.047u 5.5v super Capacitor in it as 6.3v is not available here.... on net anywhere....????? Please reply
The part is available at Mouser here mou.sr/3Ec7FWN. They ship internationally so you should be able to get one. It’s sat on the 6v rail and the voltage shown on the schematic is 5.8v so up to you. I haven’t tried any other cap in there
@@Radiocruncher sir this C704 ....are you talking about the Ceramic Capacitor brown color Small place in the Metal DC to DC input enclosure lids... ???? Is it 700nf value.... or what value it is please Tell me sir... so I can replace it sir... give me its full Value number in Nano farads please 🙏 🙂 ?????
@@Radiocruncher sir as you forwarded me the Link for 0.047nf 6.3v super capacitor ordering sites link... I have placed the order ....sir it will come.... an thanks from the bottom of my heart ❤ to you for helping me... for guiding me towards to repair the Radio 📻 🎶 as I am an Radio mad Lover only for SONY models only... below is my link how my Radio is working now sir.... 👇👇👇👇
th-cam.com/users/shortsCj8OCg7IwYw?feature=share
If I get a Sony SW 77 could you service the radio for me please, and how much would you charge?
Hi Paul. Drop me an email to graham@radiocruncher.com and we can discuss it further
@@Radiocruncher hi Graham I’ve emailed you 👍
Is $125 good deal for a mint condition working unit but without box?
Yes that’s a great price for one of those
yes since I seen a non working one for $200
the tunning knob is a litle loose
this is not the way to remove the capacitors
There was a lot of wear to the encoder
Where is Part 2 Graham?
Hi Jon. Part 2 is currently in editing and will be out soon. Thanks for watching
Hey mate? You must have some caps now, playing for Sony👲🎃🎶🐕🐕🍺🏆😰👍👏
Hi Lee. Ive got another of these in for a recap at the moment. It gets more interesting in the next installment. Thanks for watching
Interesting re-cap
Thanks Desmond. It gets more interesting as well
Didn't Mr Carlson lab just twist them off
Stay tuned for part 2 Ron and all will be revealed
I copied him on all my sony radios I have recapped during covid lockdown -- works fine ..sony has good quality PCB
Those SMD cans are the worst thing ever invented. When the start to leak the electrolyte in them is highly corrosive and will migrate quite a distance on the board destroying traces and component leads. If they get into the vias on double sided boards it can be game over. Hopefully you don't have any of that going on. ATB Doug.
Thanks Doug. Yes I think I got to these just in time. I have another one to do so have the technique sorted now. Watch out for the next video when I get a lot braver!
Doug McArtin your so right about those SMT capacitor, pretty much destroyed my RF Test set.