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 !!!
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
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.
No mater how long you have been repairing radios and amplifiers as myself you can always learn something. Thank you for the wonderful and in depth videos.
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.
As someone who discovered my interest in repairing radios from channels such as your channel, MrCarlson, Mike’s Radio Repair, etc., I definitely think it is worth it. Having someone to guide you along the thought processes an experienced tech uses from the ground up is very valuable to me. I’ve come a long way thanks to this sort of content. Still have a long way to go. Thanks!
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.
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.
Peter, Excellent video! Simply replacing a blown fuse or closing a tripped circuit breaker, can cause damage. Your methodical, logical troubleshooting is a joy to watch. Good work verifying problem by showing DC side was still working.
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!
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.
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!
Glad you posted this one because we need see the easy fixes along with the most difficult ones. I'm amazed that a receiver like this will draw 1.5 amps.
I’m a beginner and this video was very informative and I’d like to say thanks. It’s showing the beginnings of how to diagnose or troubleshoot a radio . I’m sure many others of little or no experience appreciate too ! Thanks, Ron V in Henderson Nevada.
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.
All information about problem solving a power/function issue, no matter how simple has value. Your approach was logical and easy to follow for those whom may lack such ability's. Not all repair videos must at logic level, or follow a long chain of components all over the board. It is a confidence builder. But in truth, a open fuse has almost always been the start of a cause and effect analysis. Almost never is it as simple as just a bad fuse. So yes, good video. Thank You for posting it. Someone may benefit from it.
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.
Forgot to mention that all your videos are worth watching. I find your troubleshooting thoughts very informative. Almost makes me think that I could fix it myself hi hi. Cheers
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
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.
Excellent video! Simple to repair, yes, but definitely worth watching. Thank you for taking the time to put this and all your videos together! They are fun to watch and learn from! All the best from north Texas!
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
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
Very good video to demonstrate for new people to the hobby (and even some more experienced people) the correct approach this type of problem. Don't just jump in with both feet, as we say here in Texas. Always start at the power source and work your way through the circuit. It could have very well have been a bad bridge rectifier, so your troubleshooting steps of bypassing the power supply quickly ruled out everything past that point and isolated any potential problem to the power supply. The only thing that you did not mention was NEVER put a replacement fuse rated for more current than specified by the manufacturer. Over my many years of radio repair I can't count the number of times that I have found 15, 20, or even 30 amp fuses in place of a 5 amp fuse. Usually, such replacements resulted in a burned trace somewhere else in the radio. Wonderful troubleshooting procedure video. My guess would be an old fuse that over the years gave way to age and gravity of that thin wire suspended between the end caps of the glass fuse. I have seen that many times, but as you said, usually in high mechanical stress environments like mobile installations.
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.
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?
No matter how simple, you always do a great job. I expected you to put an ammeter across the empty fuse holder & slowly bring the rig up to operating input voltage.
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.
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!
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
Sometimes it is fun just to see inside the radio and see the schematic. It looks like reasonably high quality and seems to still work well. From the single sided brown PCBs, I would have guessed that the design is from the early 80s but it is actually from the late 80s.
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.
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.
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.
The spec sheet said the radio uses 2A on DC. And yes, this video was worth uploading. Sometimes the solutions are easy, but it is still good to see the troubleshooting steps.
Yes, please do upload videos like this. It does show how to diagnose and start the rapair of a faulty device. Beginners do have to start from somewhere.
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
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
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
Simple, but a good example of what can happen. I’ve had 2 cases of mechanical failure of a fuse. I suspect it can be related to the heating (expansion and contraction) that might occur with the temporary current surge, repeated every time the unit is powered on.
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.
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.
Yes, the video was important because you started at the very beginning of the diagnostic stream. Methodically checking items before possibly burning more fuses. Thanks.
Peter, these types of videos are VERY much worth it and very much needed on RU-vid. Your thought process while going through it and why you are doing what you are doing are VERY helpful, even for people who are a bit more seasoned with electronics in general. I am certain most viewers would also agree with this. I feel you do not see the true value in even your more simple videos. You are a good teacher and a good presenter so please, keep it up. 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. Thank you and all the best. 73deN0BPS
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.
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!);-)
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.
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
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.
Hi Peter, Just a thought, I notice there's no signal meter illumination is it not working or is there none fitted from new, perhaps adding some in would have been worthwhile all the best Sean
What is that white un connected 8 pin connector hiding by the side of the power supply? Looks like it may be connected to a 3 pin on the power supply. Couldn’t find it in the schematic. Thanks for the video. 73
Peter, excellent video as usual! All of your videos are worth the watch. We always enjoy the videos Peter so don't stop them, or think about whether it's worth it or not. Thank you so much, Joel
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.
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!!!
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.
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
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?
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.
Lightning (near field)and or power surge. My rig would trip on bad storms. Live in a pour power system in the state of Tennessee.Prone to Serge. some rigs had a small amount of stand by power for memory. Danka
Yes even the simple fix was worth the watch because I was interested to see why it was not powering on for and yes simple fix but at least we see it and know.
Definitely a worthwhile video! I would appreciate seeing you clean the pot, as every radio layout is a bit different and we could benefit from seeing it done properly. On a different note, I believe that the total value of your videos would benefit tremendously from a better, smoother, less noise-crashy method of moving the camera around. I could watch your videos for hours, but (maybe it is just me) I cringe when you have to drag that camera tripod around. Buddy from The Radio Shop has a camera mount that is very smooth when repainting, and he starts/stops the camera when he has to drag it around. I know this is more work for you, and maybe that just isn't something you have the extra time to spend on...if so, that's cool. Overall, grateful for what you share! Thanks and 73, Tony KB9A
It was interesting in that a problem (2M cable) still had to be explored. For me, it was also a look into the Kenwood that attracted my interest. I just had an icom ic-7100 "fade out" on me and it started me thinking; should I have owned Kenwood units like this?? lol
