Sony ICR-4800 Radio Repair

[denshisan]

That has good resolution of the radio

[AllAmericanFiveRadio]

Thanks!

[HighFlyer186]

Another great video Rick, well done on the fix :-)

Regards, Peter

[AllAmericanFiveRadio]

Hey Peter,

Thanks. Lol, just think how boring it would be if they were all that easy. I just got back from picking up a customers Zenith console. This one will be more involved to fix if it can be fixed. Plus the customer is moving in one week so I have to get with it. Murphy has walked back into the room.

Regards,

Rick

[retrochad]

I usually don't get that lucky at getting the intermittent problem fixed so fast! I have seen a lot of this kind of problem, little micro-cracks in the solder joint, but often it's harder to pin down exactly where it is.

[AllAmericanFiveRadio]

I was not sure about it, but it was a volume problem. I could short out the audio with alligator clips going across the outside terminals of the volume control. But I could twist the circuit board anywhere and cause the problem. I was surprised and delighted that it worked.

[Ronbob59]

Rick... Very nice fix. It's nice to get an easy one once in a while. Of course, it's only easy when you know how... and you definately "know how"!

Ron

[AllAmericanFiveRadio]

Thanks Ron,

Yes it is nice. I have shown harder ones like rewinding coils so it is nice to show one that is not so difficult to repair. As long as all the coils are good most of the 50s and 60s AA5 radio are not too hard to repair. I think it is a great place for beginners, the chassis are big and you can still get the tubes for those radios. Thanks.

Rick

[joernone]

Rick,

I think it was in 1957 when my parents bought me the first Philco transistor radio. It was black and white. I would slip the leather carrying strap over the handlebars of my bicycle and ride around listening to it. A few times the strap came out of the brass holders and the radio fell to the ground. Our town's radio repairman spent a lot of time touching up those cracked solder joints. He would charge me a buck to do it.

Wish I still had that radio.

Thanks.

Regards,

John

[AllAmericanFiveRadio]

Hey John,

I wish I had kept one or two of my first transistor radios, but you know how it goes. When you first get it, it is great, then time passes and it is junk, then more time passes and then it is great again. You might try setting up an eBay search so that you get a email if someone post that radio on eBay. Thanks

Regards,

Rick

[coondogtheman1234]

Nice fix, Ive learned this when I used to work on moisture meters and static sensors at an old job I had, they taught me that exactly, and I have a raleigh 9 transistor AM FM radio and the volume knob is very hard to turn but everything works, what would you reccommend to unstick the volume control? it will turn but its very hard. I have a video of it on here.

[AllAmericanFiveRadio]

Thanks. It does work sometimes and does not take long to try. I us a few drops of WD-40, NOT A SPRAY.

[coondogtheman1234]

I think the knob is rubbing against the cabinet but im not sure, maybe i have to remove the PC board and try to straighten the knob i dunno

[jefferyb3042]

another great video. I just was thinking about what a pain in the coo coo it was to unsolder that 3 lug filter cap In the Magnavox radio. Soldering stuff in seems much easier to do.

[AllAmericanFiveRadio]

Taking parts off a circuit board is more difficult. Using a low watt soldering iron, a solder sipper, or a solder wick is a must. Reheat the trace is very easy. Thanks.

[mariopica]

As usual another excelent video. Very interesting. Thank you very much.

Best regards,

Mario

[AllAmericanFiveRadio]

Thanks Mario. It is nice to get an easy one, once in awhile.

Best regards,

Rick

[Runrad70]

Nice radio. I have several small ''World Band'' pocket radios myself, but my absolute favorite is a larger Phillips 90RL412 table top radio from the seventies.

[AllAmericanFiveRadio]

That little Sony performs very well. I dont think that Phillips made any bad stuff, all there products are high quality. I bet DXing with that Phillips 90RL412 is interesting and fun. I need to listen to more shortwave radio myself.

[xmare]

It looks that a cold joint sloder, at the GND pin of the volume pot., caused that fenomena.

[AllAmericanFiveRadio]

Yep, it was very loud. If the problem comes back Ill add some wire where the break is and solder it in to strengthen the break. Thanks.

[BassmasterBling]

I like these videos where you diagnose a problem from scratch.

[AllAmericanFiveRadio]

This problem may comeback. It is hard to say because I could not really see anything where the break is. But I now know where the problem is. I was not excepting it to work.

[AllAmericanFiveRadio]

lol, Sometimes I get an easy one, but not often. This is what happens when Murphy leaves the room.

[jenko701]

I use freeze spray to find this sort of thing. I spray it very lightly over suspect areas. It can help you close in on the broken place.

[AllAmericanFiveRadio]

What a good idea. Had not tried that one yet, Ill definitely give that a try. Thanks.

[JimmerSD]

I've had them cool down after that and had the problem re-occur. My worry would be a micro crack on the PCB or a broken foil.

[AllAmericanFiveRadio]

Oh yes! If it does return then I get out the big magnifying glass and find the broken foil, now that we know what it is. I would then clean off the coating on the broken track and solder a small wire across the break. That work very well. Thanks.