Panasonic RF-2200 Part 1: The Repair

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Күн бұрын

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@xraytonyb Жыл бұрын

0:00 Intro 0:56 First look inside & power up on power supply 2:21 Checking the simple things first 4:09 Doing some signal tracing of the audio section 6:35 Finding the fault at the preamp transistor 16:55 Making the repair 24:15 Testing the repair 25:42 Radio is back together - Another problem!! Back to the drawing board.... 27:49 Troubleshooting the second fault 44:08 Second fault is found - making the repair 49:07 Testing the second repair 50:19 Final test - end of part 1

@Parkhill57 Жыл бұрын

As kids in the 60's we grabbed our sleeping bags and tuned all night for long distance AM radio stations. It was a Norelco AM radio, and the sensitivity and selectivity was better than anything I'd seen before. We also saw three satellites pass over that night. Not as much pollution back then. Course we slept all the next day! ha.

@moshezaharia4666 Жыл бұрын

I love this radio, it's easy and fun to use and you will enjoy it, it is very sensitive on all bands. Mine is the Japanese version (Cougar 2200, FM band is Japanese), the band switches can cause trouble but soaking them with contact cleaner solves this, I had to spray all the switches (band switches, BFO, markers). The BFO tends to drift the first 5 minutes (it is noted in the user manual), after that it will get stable. I had C182 (2200uf/10V) very leaky which started draining the battery, checking the capacitors is in order but I would not shotgun it if not needed. Your radio had the lower light out and you will need to align the upper dial because it looked very much out in the end of the video. How did the corrosion got to the switch block? vapors, not only the batteries leak their acid inside the radio, but vapors from the acid can reach very deep inside. Best Wishes, Moshe.

@jaybats7865 11 ай бұрын

Morning coffee and XRayTonyB….can’t think of any better way to start the day 😊 Thanks for all the fun 😃

@johnsampson1096 Жыл бұрын

Small chime in, Tony. My 2200 as I mentioned on part 2 of this series had a marginal working AM Section as far as sensitivity went. Believe it or not it was being caused by the FM AFC/BW on off switch making poor contact! Thought it might help other viewers. These radios are good keepers..........

@hestheMaster Жыл бұрын

Great troubleshooting there Tony! These kind of repairs can be needed on just about any older vintage radios where ever you find them. Nice to have the schematics on this radio! From the looks of the rust covered switches this radio was either left out in the rain , was a seaside home radio, or taken on a fishing trip once too often. I doubt any battery corrosion would have gotten there as the part is too far away from acidic corrosion and there was none found between it and the battery compartment . As a general rule however batteries left inside for years will eventually just about ruin some parts of any portable radio. Good thing you had a spare parts chassis! Looking forward to part 2!

@mikesmuseum Жыл бұрын

I really enjoyed this video because your troubleshooting skills are excellent and you were able to track down a corroded trace and corroded switches. Bringing this radio back to life was really awesome to see. (Lucky you had spare parts!) You are so correct in saying that people really should remove their batteries from these portable radios (or whatever) when they are not in use. Well done, keep up the good work!

@markross5410 Жыл бұрын

Hi Tony, Great Video ! Almost the exact same problem on mine. I had FM but no AM. Your video helped me trace it down to the BFO switch. Its working now !!! Just have to figure out why the lights are not getting voltage and put it back together. Many thanks Sir......

@airmann90 Жыл бұрын

What a neat radio. Super interesting when you go through the schematics.

@philipslighting8240 Жыл бұрын

Wow a Fantastic Pangalactic Panasonic.. Great work so far Tony.

@jjarratt Жыл бұрын

Nice job troubleshooting. I have a 2200 that just had the problem with the switches. They didn't have the degradation of yours but still needed to be cleaned

@electronicsoldandnew Жыл бұрын

That’s a really nice radio. Haven’t come across it before, but it made me miss my grundig satellit series restorations.

@thelastofthemartians Жыл бұрын

Interesting vid Tony. My guess is that someone cleaned the switches with something they thought was contact cleaner (WD40?) - I mean, since the switches are at the top the batteries would not have leaked upwards (or maybe I missed something :/)

@davidtagg2077 Жыл бұрын

Watching this at 2-00am uk time tony,great video,

@samuelfellows6923 Жыл бұрын

Interesting that it has an unusual analog meter ~ the signal strength scale is inverted (10>0) and is an upright bottom pivot style - the needle [traditionally] resets to the left, so it pegs to the right with no tuned signal, and if a staton is tuned into, it resets at 10. It is also a multi-meter and indicates battery level so is it simultaneously indicating both battery & tuning, without the need for a changeover switch?

@petertimp5416 Жыл бұрын

Something different, thanks Tony.👍

@zx8401ztv Жыл бұрын

Tony it's nice to see you doing something for yourself for a change :-D

@andymouse Жыл бұрын

I would have thought that battery leakage would have been all over the place to have gotten into those switches as bad are you sure that wasn't salt water or something else ? the immediate area on the PCB was untouched, great video....cheers.

@hestheMaster Жыл бұрын

Battery corrosion ate the PC board up and there is no doubt there, but the switches are too close to the outside front and too high up for battery induced corrosion. This radio was probably left out in the rain ( even one day ) and that would have destroyed the switches.

@tomki6asp Жыл бұрын

Those three switches on my recently bought ebay RF2200 have the same problem. Achilles heel seems correct.

@steverhenius6734 Жыл бұрын

The battery corrosion is potassium hydroxide - alkali , not acid. The vinegar is an organic acid which turns the alkali to salt - carbonate which ca easily be removed. Good logical fault finding nevertheless :-)

@andybonneau9209 Жыл бұрын

I would have tried repairing the trace. Running a wire is a much better idea.

@bernardbresslaw6521 3 ай бұрын

I've got one of these in excellent cosmetic condition, but no power at all with either the AC or the batteries 😕

@justicelut Жыл бұрын

Nice work Tony, looking forward to part two. Thanks.

@PilotInCommand777 Жыл бұрын

you could probably repair that old switch using something like a record/play slide switch from a scrap cassette or similar. Those slide switches use contacts that look very similar to your switch

@lucancherby Жыл бұрын

I had to cut this short and go listen to "Leave it" from Yes such a good song

@OIE82 Жыл бұрын

FYI: 419C-55ML is obsolete. I am guessing from what I read that 419D-55ML is the replacement?

@Chuck-U-Farlie Жыл бұрын

LOL of course the AM station that you found was the Maranatha guru guy!!!

@Rebel9668 Жыл бұрын

Looks similar to one of those Reader's Digest radios.

@PP-ob8zr Жыл бұрын

The Song is Yes- Leave it.

@alphabeets Жыл бұрын

It doesn’t make any sense that the switches were damaged by the batteries. Nothing else around them has any corrosion. I think it is more likely that someone sprayed something into the switches that was corrosive.

@JCWise-sf9ww Жыл бұрын

People never learn to remove batteries when not using the radio for a long time or if it's stored away for years.

@davidknight3643 Жыл бұрын

Hi Tony I hope you do not mind me asking, but do you or anyone in the subscribers know where I could find a schematic for a Panasonic RF-D1 radio? All I have found is a manual which doesn’t include one. If anyone knows of any sites I would be very grateful. Dave from the UK many thanks in advance I love the channel by the way.