#200

[@johnschroeder6288]

Yes, this video shows how to diagnose even a simple problem. It is worth it, Peter.

[@TRXLab]

Thanks John 73

[@EUImperator]

I have this Receiver bought in 1992 and ever since standing on my Table but after Years of not using the VFO seems to be very sluggish and not smooth,. Also I never bought additional Filters therefore could you please tell me where to get repair if neccessary for this Recever and if there are still Spareparts, if needed, and where to get it from, may be ??? Thanks for the nice Video, however !!!

[@paul-c7541]

Peter, Every video from you is a good video, everything needs to be seen all-round training is good , no matter how good you think you are. 73 Paul

[@TRXLab]

Thank you Paul! Have a nice Sunday 73

[@kaleembaig319]

Dear Peter, Thank you for uploading this video. Trust me i learned a lot from this video. It was worth uploading, don't skip on the pretext that it was a simple fix and not worth uploading. Amateur technicians like me learn a lot.❤️❤️❤️, Stay blessed.

[@michaelcarey]

Excellent video Peter. The methodical approach to repair is the way to go, even a simple or obvious fault needs proper diagnosis.

[@TRXLab]

Thanks Michael 73

[@tpcdude]

I started my serious SWL hobby with this rig. It has the most frustrating frequency entry keyboard, the digits in a stupid counter-intuitive order that drives you crazy

[@TRXLab]

Modern radios are often not better in this regard lol Thanks for watching

[@hbmarcott]

When you were looking at the spec page it showed 35 watts AC and 2 Amp DC but you seemed to not noticed it. so the 1,5 amp draw on your power supply was correct.

[@TheLightningStalker]

Hi I have a Kenwood TR-7625 with a squelch that is stuck open. The potentiometer is fine and the capacitors test good but it doesn't close up. Sometimes if it sits running for a long time it will start to work. I'm thinking maybe the transistor or one of the resistors but it has bothered me since I got it 4 years ago. Thanks for sharing your knowledge.

[@josephlicata4304]

Very thorough troubleshooting! Thank you

[@MrKelendros]

Nice video Peter, Thx for sharing your time. No problem with a fuse fault only. You always teach something interesting!

[@TRXLab]

Thanks Carlos 73

[@vtradio]

My Kenwood R-2000 was not picking up any stations after being out in the cold garage all winter in Vermont. However, it did power up. Your video inspired me to take the covers off and inspect the radio. After consulting the trouble shooting guide, I found a blown 100 mA fuse that could cause this problem. I momentarily bypassed the fuse and got reception. It's an odd size fuse, and I don't have one here, but I will get one soon, and get this nice radio back up and running. 73 Paul AA1SU

[@hectorpascal]

It's ALWAYS very risky to bypass any blown fuse. You don't want a transistor or even the mains transformer windings blowing instead of the fuse. If you must do it, use as close a value replacement as you have on hand.

[@Steven_VE9SY]

For some one new it shows them the way to start trouble shooting. I think it was an excellent video. The owner may have just hooked u the DC in the wrong polarity. Shows that some fixes are simple. Enjoy watching you videos. I've actually been in the middle of a project and one of your videos will pop up and something you do will kick me in the but and remind me of a basic step I missed.

[@TRXLab]

Thanks Steven 73

[@PileOfEmptyTapes]

The high standby power consumption is likely to be normal for this model - it only turns off the receiver section and puts the microprocessor in reset, but other digital circuitry and the display (VFD - heater!) remain powered on. That's the 1980s for ya.

[@TRXLab]

Yeah that is true.. Thanks for freed back 73

[@tuxontour]

Hmm seems like AC and DC power at the same time ... maybe DC voltage spike so the battery worked against the transformer ... btw the anti backfeed diode in the 12V part works also against wrong polarization of the imput jack.

[@Radiocruncher]

Well worth showing Peter. Very interesting as always. Strange that the 2m module was disconnected. I suppose a surge could have taken the fuse out. Regards Graham

[@TRXLab]

Thanks Graham! Yes it is strange with the 2 m and still no answer why it was disconnected..73

[@iw0hex]

Very simple repair dear Peter :) Thanks for sharing. Regards, Pasquale IW0HEX

[@TRXLab]

Thanks Pasquale 73

[@timsherry49]

Very common problem with the volume control. My 5000 does the same thing. Needs a good cleaning.

[@digbootyman]

Have got the same Rig with the same problem with the volume control any idea as to how to clean it ?

[@TRXLab]

basically dioxide spray will do the job for you

[@hectorpascal]

Hmmmmm. I REALLY hate faults like that! I need to know WHY it failed!!! I would always leave such a repair switched on for 48 hours - just to see if the fuse would pop again.

[@mbaker335]

A lovely piece of kit, worth a video just to look inside. As it happens I have one with all options and filters apart from 2m. I had it on my lap in the UK, put my finger against the so239 socket and listened to an Aussie amateur station come crashing in. Works beautifully including the display. My only question. Should I recap it or leave be until it actually goes wrong. If the latter buy new caps now or wait?

[@TRXLab]

Thanks for feed back 73

[@hughmc5419]

Trx, Nice video ,I liked that you used the 12vdc & brought it up slowly and watched the amps,ie:current. Also you broke out the prints to pinpoint problem, and eventually, retried ac [ via- new fuse{__ 120v @ f2 }, feed in signal & tuned it for the harmonic resonance...¥.....Great video..Hugh...Chicago, metro..Oak Park,IL.

[@TRXLab]

Thanks for feed back Hugh 73

[@captlarry-3525]

We used a color tv set for 10 years, that I pulled off the trash pile, after I replaced a solder-in fuse ! The schematic shows a 3rd fuse in the primary of the transformer.. does it exist...or is it really F1? I would have been inclined to isolate the output from the FW bridge, from the radio and test with the new F1 first... just in case. This is highly worthwhile, because you ALWAYS have to confirm that tha power supply is working correctly, before you can procede. You will have egg on your face if you forget this.

[@williel.morris4492]

Yes, Yes, I always enjoy your Videos keep them coming...

[@TRXLab]

Thanks Willie 73

[@PapasDino]

I think it's worthwhile to share even the easy fixes Peter, thanks! 73 - Dino KL0S

[@TRXLab]

Good to see you Dino and thanks for feed back 73

[@curtw8827]

All your videos are informative. The fuse looks to be mechanically defective as it does not look blown. Some hams are appliance operators and would never remove a cover.73

[@TRXLab]

Thanks Curt 73

[@Bass.Player]

I have seen this a couple of times before, where over time the solder in the end of the fuse just gets to warm and winds up in the bottom of the end cap so no further current will pass. the fuse still looks good but under close examination the issue is revealed... K5AZE

[@TRXLab]

Absolutely right I have seen it too. Thanks for stepping in 73

[@SkyWire88]

I believe it is important to show all types of problems, whether it is simple or complex, because, after all, that's what we will find in real life. Nice job. Thumbs up. I enjoyed it.

[@TRXLab]

Thanks for your feed back 73

[@CT1ELP]

It was worth it ! It is always worth it even if it is just to see the radio´s inside. Keep up the good work. 73

[@TRXLab]

Thank you

[@Mr_Meowingtons]

Back in the day i was going to get this radio.. but i ended up just getting a Kenwood TS-450s this will be a good video

[@TRXLab]

Thanks Matt 73

[@TheRadioShop]

"""We WILL win the game""" Thats the spirit my friend! Remember, eve a simple video can help someone out. Thanks for sharing Peter. I enjoyed it.

[@ojjenkins7110]

Hi Buddy. The n didn't get on even for some reason. I noticed F1 was not blown in the middle so maybe the owner looked and thought the fuse was good??

[@TRXLab]

Yeah you are right Buddy Thanks for feed back my friend 73

[@2904carlosleon]

HOLA , GRAN TRABAJO . tengo este mismo receptor y me encanta, pero hace unos dias al pulsar cualquier tecla de funcion emite al hacerlo un beep tone por el altavoz un poco fuerte que resulta desagradle .. no veo que opcion he cambiado .. hay alguna forma de reconfigurarlo para que no pite al cambia o pulsar el teclado ?? gracias

[@kennynvake4hve584]

Could you tell me where I can buy the coaxial female, connectors thats go thru the PC board.

[@ThePe1ryx]

Hallo, I have a TS140 what works perfect till 12meter,above it is losing vco both transmit and receive are bad if turning the vfo i find frequencys where it is fine from 25-30mhz.If i start the radio cold,it works for a minute perfect everywhere.Dont know where to look anymore,can you give me a hint please? Gr Rob

[@RadioamateurKjellSvendsen]

Some silly people like to totally overlook your knowledge and just focus on your language. I really do admire the fact that you still go on making more videos, despite of this fact, to teach and share your wisdom and skill. So, TY VM OM fer Who U R and what U DO de LA1HHA es 73 OM!

[@samw2195]

Great Video as usual be good to see a TS440 with the display full of dots if you get one in anytime 👍

[@TRXLab]

yeah I had some with that fault but I think not having done a video on that. Okay next time..73

[@mbak7801]

I have one of these fully optioned out and working (apart from the 2m module). I had it on my lap at a friends house (UK) and I put my finger on the so239 at the back. An Australian amateur radio station came hammering in (ok a high power one). This is a very nice receiver and super sensitive. Well worth putting on the channel just to get a look inside.

[@michelfries1429]

A R5000 always needs to be repaired! Too good radio!

[@willhelmx8388]

For a big spirit no problem is to small :-) things like this comes along now and then, still a nice video Peter 73´s

[@TRXLab]

lol yeah..Thanks Willhelm 73

[@berndb.5097]

Hi Peter, My week was exciting enough, so the video with "just" a fuse change was very relaxing. But what did we learn? Changeing a fuse, and do not worry why, is certainly not the right approach. I just like to look into such old equipment. Interesting for me...... Is the small board with the two quartz(filters) and the red transformers the AM filter? Thank you for the video. 73 Bernd

[@TRXLab]

okay very good Bernd..Thanks for feed back 73

[@scottdaviesvk2sdx319]

For the first few minutes I was literally yelling at the screen - "What is that connector near the black heatsink doing? It's not connected!"

[@mikefinn2101]

yes great video still very useful and i am happy to be back in the lab with you. very thankful never worked on this radio. The steps are very important and even an experienced Ham needs to start with the basics as you did and not jump to conclusions. In fact many skip this part so glad you took the time to do it right. Always very happy to watch one of my favorite channels and look forward to each one. always a great pleasure and enjoyment for me, forever thankful best 73s wb7qxu

[@Wildman9]

Did you also clean those pots.?Good info.🔌📻

[@charmio]

I've always had them come back to life after just turning them back and forth for a minute. Bet ya that things just not been used in a few years. Anyone here ever had to actually clean them?

[@markdraeger7689]

Well worth watching if you need to work on this radio. Good camera views of components, and a clear reading and diagnosis per the schematics. It will help me on my more difficult problem. Thank-you!

[@burnts1enna]

I operate a Kenwood R-5000 receiver. The pots are noisy and should be cleaned. Have you posted a video showing how to clean pots up? Liked your video. Thanks for posting!

[@LeeKirkman88]

Fuses can naturally degrade over years of operation just like light builb Filament can degrade through heat and use over time it becomes brittle. It could have also been a small amount of moisture in the enviroment thats not unheard of. Happens alot when people put things away in the loft or shed for years and they oneday decide to power it on. Without properly drying it out. Also Electrolytics can become corroded. As i found out when i bought a Concorde 2 that had sat in a attic for 20 years. Every single one had green legs and i recapped the whole thing. Also gave it a good going over with servicol including the relays. And that cleared up the Audio crackle and intermitence.

[@rangersmith4652]

Seems that AC side fuse did its job very well, probably due to a power spike from lightning, or some such thing. Yes, well worth posting the video simply based on the methodical approach you took to solving the issue.

[@danishnative9555]

Not sure why you are concerned. You do a great job of dogging out the problem either big or small. That is the satisfaction part. Personally, I like more complex repair, and really good test gear. Gave you thumbs up. Thanks.

[@TRXLab]

Thank you 73

[@pc4ad]

Yup, for sure a good video to upload. Check everything before just changing the fuse and reconnecting. Damage might be done otherwise. 73 de PC4AD

[@StreuB1]

I agree 100% which is one of the real takeaways in this video for people to see and understand. The fuse blew for a reason. It could have been age, a bit of corrosion got in and weakened the element causing a slight surge to blow it. It could have been more though and thats what people need to see. They need to understand that chucking a new fuse in and powering it up isn't always the right solution. A bit of time with a meter, your eyes and the old nose looking for traces of the golden screwdriver and the magical smoke is required.

[@TRXLab]

Thanks for feed back 73

[@donstewart248]

No such thing as a dum question. It is all a learning experience.

[@TRXLab]

Thank you 73

[@KOKO-jo6ty]

just only a fuse problem! but you w alking around about one hour!

[@TRXLab]

This video is for beginners and as you see by all the comments it is highly appreciated. If you are a professional it is for sure not a video for you...

[@emylrmm]

Fuses have an I2t rating and inrush needs to be considered. There are there for safety only, they generally do not protect circuitry from damage. I would put in a standard curve fuse, not a fast-acting type in that circuit.

[@ThomasHart59]

I still have my original Kenwood TS-440 sitting on the shelf. One day I'll fire it up again. Hopefully it'll still work as it did when I last used it.

[@TRXLab]

Hope your TS-440 will still work...73

[@alancordwell9759]

Definitely worth seeing, Peter. The diagnostic process is the key. Like you I've seen a few fuses fail for no apparent reason. It just happens... :-) best 73 Alan

[@TRXLab]

Yes that is true Alan! Thanks for feed back 73

[@emylrmm]

Notice that the specifications for list DC input current of 2 amperes and you measured very close to that value at nominal DC voltage.

[@chronobot2001]

I think the big cap in the power supply is degraded. I don't think that dark ring around the cap is supposed to be there. I think it is dried leakage.

[@Michael-qr7hn]

Thank you I like your approach to solving a problem. It takes me back to when repairs where done in the correct way.

[@tlrptg]

did you check D1 ? if it's shorted, any future short circuit on the 13,8V DC IN pins can blow F1 fuse again.

[@TRXLab]

The rectifier and the D1 is fine....73

[@bobclarie]

Very Helpful Peter . . going through the diagnostic process. Thanks ! '73 Bob

[@TRXLab]

Thanks Bob 73

[@IMSAIGuy]

Any video is good. The positives were: got to see inside an R5000, always check basic like fuses. interesting to see two fuses in the circuit. good idea to try DC power. might add checking the supply voltages and the look of the capacitors to see if the problem will repeat.

[@TRXLab]

Totally right...Thanks for comment 73

[@charlieoscar09]

Thankyou for the video Peter

[@TRXLab]

Thank you 73

[@NMrick505]

I have one in storage. I may need to bring it out and hook it up.

[@TRXLab]

Very good idea Rick :-) Thanks for watching 73

[@tongordebeke1355]

Peter, Ich danke für deine ausführliche Erklärung. schaue mir gerne deine Videos an. Und lerne immer wieder. Gruß, Ton

[@TRXLab]

Vielen Dank Ton! 73

[@FlexxVision]

Complettly dead devices are most of often good devices ^^

[@TRXLab]

LOL yeah often true 73

[@donschneider7252]

Yes thank you for showing the simple stuff for us simple folk! We need to start somewhere...

[@Beretta96Dan]

Peter, even a blind squirrel get a nut every once in a while! Lol!

[@TRXLab]

LOL yes that's it Thanks for watching 73

[@OleF112]

Another nice, short video about everydays problems in the radio world. Radio is not working? so check the first things first! That is something everybody can do, just do it! Thank you Peter and 73! It´s hard to let it come out from my mouth: "Helau!" (instead of Alaaf!);-)

[@TRXLab]

LOL I don't even know the difference between Helau and Alaaf haha. Thanks for feed back Olaf

[@teashea1]

Too bad the face plate is so beat up ---- Even when you fix it I would not pay a dime for it ----- It is trash

[@psionl0]

Hi Peter, I am one of a number of viewers who was originally referred to your series by your friend Paul Carlson. After watching a couple of videos, I find that I enjoy your style of speaking and I have been watching your series ever since. Question: Have you considered using the "super probe" and "signature tracer" that Paul describes in his videos (kzbin.info/www/bejne/oHzVZKWajZ6ijrM , kzbin.info/www/bejne/joiad6ttgpunrqc)? Apparently they can dramatically reduce the time taken to find a faulty component - even if you don't have a proper circuit diagram.

[@TRXLab]

Thank you very much appreciated! Yes Paul is a very nice person and a true expert! I'm using the signature tracer as well for a very long time but have not yet used the super probe..

[@danedewaard8215]

Nice video! A real nail biter for a while there! It's nice to have a outcome that can be achieved by viewers with a minimum skill level once in a while!!!

[@SuperMeganw]

Very good Video From GARY in the UK .

[@TRXLab]

Thank you Gary 73

[@trickyrat483]

Great videos - but god damn the audio noise from the constant dragging of that camera mount across the desk is extremely annoying. Please for the love of god either pick the camera up to re-position it, use zoom, or simply a different camera mount. Sorry to sound so negative, Peter, but that dragging noise makes your videos painful to watch.

[@TRXLab]

okay got it. hope I can improve it in the future

[@zeproo]

i learn i learn !!!

[@TRXLab]

Thank you 73

[@twoheart7813]

I worked on an R-2000 that was blowing fuses and traced it to a shorted electrolytic on the main board. After replacing that it powered on fine but with AC hum so replaced the ps cap and it played fine.

[@TRXLab]

sounds good thumb up!

[@1ytcommenter]

schönes video wieder! wie viele geräte bearbeitest du so im jahr auf deiner testbank?

[@TRXLab]

vielen Dank! ungezählt..73

[@markphillips8019]

Really? 20 minutes to diagnose a blown fuse?

[@80Loke]

Advanced or simple fix any video is always nice, i would like to se some video about antenna basics and maybe how to make a own antenna for 70cm. :) 73s

[@TRXLab]

Thank you. 73

[@etheroar6312]

at about 15:00 on DC and again about 19:00 on AC the display is cycling brighter and dimmer. Not sure if this has any bearing on the problem, but might indicate a failing component.

[@TRXLab]

Yeah must be a camera effect..Thanks 73

[@larrytruesdellsr.809]

Do you give your repaired radios a burn in before returning to customers?

[@Daveyk021]

I never trust why a fuse would fail on its own. I'm surprised you didn't monitor the current through the fuse to see if current draw was boarder line.

[@TRXLab]

my power analyser is always in line....

[@johndk9jc354]

Load up everything. No worries there. 73s

[@fardellp]

Blown fuse could have been due to a voltage "spike" on the mains. Maybe the radio was used in a rural area where this is more common?

[@TRXLab]

okay got it Thanks 73

[@rlmillr]

300 ma when off seems to be a lot of power to run clocks.

[@TRXLab]

yeah but that are the 80's...73

[@burnts1enna]

Good video, thanks for uploading. But i wish you would have shown now to clean the pots!!

[@TRXLab]

Do you mean with chemistry?

[@twoodruff01]

I found out that I was doing something wrong. It has sound>

[@mvssarma3387]

lovely video, video Peter. with this motivation I tyry to service same model tomorrow. Thyanks

[@TRXLab]

Good luck with your project!

[@624radicalham]

If you're interested my friend, let me tell you what would also be helpful. After your excellent repairs it would be very important to see the radios in operation with a live antenna connected. Play with the controls, the IF Shift, the RF gain , etc. while listening to live SSB and AM signals. It does not matter how long the video will be. This will be helpful to all viewers so that we can see the live characteristics, how it deals with weak signals, how the buttons sound when turned, etc. to help us make a decision when buying a similar radio. You have a unique opportunity to do this with all of the radios that pass through your hands. Please consider this.

[@HitchHiker4Freedom]

They are all worth it. Thanks for taking the time.

[@TRXLab]

Thank you! 73

[@earlrichardet2102]

Peter, is it possible that the 2m RF connector being loose and dangling in the radio, that it could have shorted out a component while power was on? Causing the fuse to blow? That seemed possible to me. Cheers

[@TRXLab]

well yes may be but I would expect the other fuse to blow first but you never know...Thanks for comment 73

[@earlrichardet2102]

@@TRXLab You know, I might have missed that point in the video. Thanks again.

[@poparab]

aus dem Wort selten machen wir im englischen "rare"

[@berniken6511]

No problem in showing the video Peter, its a fault and needs to be found just like any other..................................................Berni

[@TRXLab]

Thanks Berni

[@xmenken1]

In the real world of electronics repair, it would be very difficult other than checking swollen capacitors, burnt resistors or blown-out fuses.

[@TRXLab]

Hmm that is true but don't understand what exactly your point is...73

[@BruceNitroxpro]

@@TRXLab, I believe he meant that you failed to even look for anything (including a broken audio pot) other than an open fuse.

[@jamesdoyle6839]

I'd also check the Bridge for leakage.. put a bulb in meter also.

[@TRXLab]

The bridge is fine...You mean the S meter right?

[@Gw0wvl]

It's like the Parrot from the Monty python sketch 😁

[@TRXLab]

lol

[@trueblue2k2]

A no power fault is usually isolated to power supply failure or overload, relatively easy to isolate and repair. After viewing the bench full of expensive equipment behind you, it's obvious you are an experienced technician that can fix it during this 30 minute video.

[@markkut9419]

Again suberb solution about fault finding. Danke schön

[@KC-vp7wn]

Yes thank you for the video. I also have an R5000 unit but it needs the main capacitor off the bridge, you clearly hear AC hum. Still a very nice radio for it's time.

[@GarthWheeler]

thanks i have one with a dot problem

[@albertoramirez9364]

great video for new comer lots of likes

[@neil6765]

This video was worth it and I love the radio

[@TRXLab]

Thanks Neil 73

[@rubusroo68]

lovely looking set

[@TRXLab]

not to bad for its age..

[@hamandwine]

I can understand your sorrows... Just changing the fuse and it works again... but doing the math 13V at 1.5A is around 20W and the manual says that it are maximum 35W over AC and 2A at DC. So all is fine within spec. An often forgotten thing is the power-on inrush-current. It causes a heat stress on the fuse, that again causes a mechanical stress on the fuse-filament. And after some years... However, you showed a perfect way to start such a unit by a current limited DC power supply, just in case it is not only the age of the fuse. Thanks!

[@TRXLab]

:^)

[@berbaas9048]

Peter, It is not so much the video as much as your troubleshooting mindset that is valuable to me. What the problem is has no impact on how you think through the problem, even if the problem is painfully obvious. You could troubleshoot an egg and I would still be glued to your thought process. Going off on tangents encompassing all related issues that could cause the symptom is a skill we all need to learn...73...B

[@TRXLab]

Thanks for feed back! 73

[@ojjenkins7110]

I noticed that F1 was not blown in the middle so maybe the owner looked and thought it was good?? I have an R600 that needs looking at so maybe I'll get to it someday?? :-) intermittent unlock so I just whap it and it starts working again, good old American give it a whap and see what happens :-) Happy Spring.

[@TRXLab]

May be OJ and thanks for feed back! Happy spring 73