I'm glad to see someone fixing ham radios again on youtube.

Very nice Peter. Good to see one with a problem that stands out without a lot of work put into it. Thanks for sharing.

@TRXLab

3 жыл бұрын

You are right Buddy from time to time it is good to have an easy one ...Thanks for stopping by my friend

I absolutely HATE the fact that I do not have as good a knowledge of electronics as you Peter. It is very frustrating to try to fix something when you have only about 35% of the knowledge you need for the job. You are an inspiration for me to learn. Thank you!

@TRXLab

3 жыл бұрын

Don't worry go your way and you will gain your knowledge anybody needed time to get to the wanted level...

@vidasvv

3 жыл бұрын

Practice Practice Practice !!!

@jean-philippebuchet9083

3 жыл бұрын

same for me despite of 42 yeras of amateur radio ....

Great to see you back Peter!

Nice repair Peter, the magic smoke helped this time.

@TRXLab

3 жыл бұрын

lol yes in this case..

Another fine repair. I was surprised to see you bother to test that obviously fried transistor, but now I see why you did it - to see if the base was shorted as well to check for further damage.

@TRXLab

3 жыл бұрын

Thank you

Hello Peter, Nice quick repair on this IC-7000. You always do an perfect job. Thank you for taking us along on your repairs. Stay healty!

@TRXLab

3 жыл бұрын

Thank you

Nice to see that you are back! All the best!

I am a little late, i finally fixed an old TS140 this weekend.. FIne video Peter, and that was a joyfull repair! One single broen part, and it called loud "Fix me, have a look at me" ;-) Good job, and a happy operater with a Icom 7000. See you next time on the driver board..just kidding! 73 de Olaf

@TRXLab

3 жыл бұрын

No worries, Olaf you are never late we all have our things to do. Thanks for comment. 73 from Peter

Thanks Peter, I enjoy watching you work through the problem

@TRXLab

3 жыл бұрын

Vielen Dank

Some good luck for the owner, probably thanks to one of the fastest fuses on earth - the silicon junction transistor!

@danluzurriaga6035

3 жыл бұрын

Fuses open. The transistor shorted.

That was super enjoyable. Thank you for sharing the project. It is much appreciated.

@TRXLab

3 жыл бұрын

Thanks for watching

Well done Peter. Faults are rarely that obvious. Nice catch to see it right away. Always enjoy and learn from your videos. Keep up the great work.

@TRXLab

3 жыл бұрын

ja das ist wohl wahr selten sind die Fehler so offensichtlich...

Great work Peter

I've got my coffee and TRX Bench saturday back, life can't get any better. Thanks Peter *73* and *10-4* good buddy

@TRXLab

3 жыл бұрын

very good glad that you really like it..

as usualI loved your video. Thanks for including the schematics and the diagnostic thought process. Thanks for your efforts :-)

@TRXLab

3 жыл бұрын

Thank you glad that you liked it!

Nice repair Peter! Thank you. 73

Another fun and nice repair peter, i enjoyed seeing you along the repair. See you in the next one )

@TRXLab

3 жыл бұрын

Thanks for feed back

Nice easy repair 👍👍👍

Hallo Peter... sehr interessant wie du an die Fehlersuche gehst, super beschrieben, mit langsam und verständlichem Englisch ... das ist mir ein Abo wert ... muss erstmal alle anderen Videos anschauen von dir Viele Grüße aus Dessau, Maik - DF7MR

@TRXLab

3 жыл бұрын

Das freut mich Maik das es dir gefällt und herzlich willkommen in dieser Community! 73

Nice job Peter .

Nice job fixing the radio I wish I had your knowledge keep up the good work

@TRXLab

3 жыл бұрын

Thank you

Hi Peter, Nice repair. Luck was with you this time the CPU was not damaged. Stay safe. 73 WJ3U

@TRXLab

3 жыл бұрын

Thanks Don

Nice one Peter, thank you !

Thanks again for a great video,, I feel good on this one,, I guessed what the problem was,,, I try to guess with all your videos !! Thanks again.

@TRXLab

3 жыл бұрын

ah good to hear. Thanks for feed back..

Great job Peter, in this case we are lucky because it's easy to see a burnt transistor but the skill is to know where you have to find it, I had a similar issue, 7000 always in TX but in my case was a condesator shorted in Logic Unit close to CPU. Regards. 73, Pasquale IW0HEX

@TRXLab

3 жыл бұрын

You are absolutely right my friend! Thanks for feed back

magic SMOKE :-) LOL . Thanks Peter !!!

@TRXLab

3 жыл бұрын

Thanks for watching

Thanks Peter 👍🇬🇧

Great Job Peter :)

@TRXLab

3 жыл бұрын

Good to see you Grant! Thank you

I enjoy your upbeat intro, and a nice easy repair on an expensive radio. The old Yaesu FT-736 mic key line on the front was tied directly to the CPU - it was reported that if a satellite data modem was improperly wired to the MIC jack, the CPU would short & permanently put the radio into TX. I often wonder how many CPU's were fried that way... 73!

@TRXLab

3 жыл бұрын

Thank you! Yeah it is critical to tie CPU ports directly to external sockets.

Nice repair the owner of that radio got lucky the CPU didn't go up in smoke. Maybe that transistor protected it. Thank you Peter for sharing with us. 73

@danluzurriaga6035

3 жыл бұрын

No, the transistor base was shorted to C-E, carrying 14V to CPU output. Hope it wasn't made weaker.

Hi Peter, you still have so many transistors that you can repair a lot of IC7000s with ..... LOL Provided that they all have the same defect ;-) Thank you for your video. 73 de Bernd

@TRXLab

3 жыл бұрын

lol yeah that is what you need on stock if you are dealing with Icom

Wie immer, tolles Video Peter. 👍👍

@TRXLab

3 жыл бұрын

vielen Dank fürs vorbeischauen...

Great explanation!!!

@TRXLab

3 жыл бұрын

Thanks

Excellent diagnosis and repair as usual Peter. As you said luckily it was only that one small smd transistor, I'd hate to see the price of a replacement IC for it.

@TRXLab

3 жыл бұрын

yeah really glad that the CPU survived

Seems like these things are in the shop a lot. I have one new in the box. I should save it. Maybe it will be rare someday, haha.

@stargazer7644

3 жыл бұрын

You can't really blame the radio for someone plugging in the wrong cable and apparently putting +14V on the PTT line and shorting it to ground through that little transistor.

Thank you!

very nice!

Great vidéo Peter 73's!

@TRXLab

3 жыл бұрын

thanks you

very good video. simple fix.

@TRXLab

3 жыл бұрын

Thank you

How do I get the icom IC 7000 used in Japan (rarely) to be able to TX at 27 Mhz, please answer, thank you

Good job. Always wanted one of those radios. 73 de KD4HCT

@stargazer7644

3 жыл бұрын

I had one for 10 years in my truck. Kind of glad I got rid of it since I've seen how many TX driver problems Peter has fixed on these.

What do you use to shield the circuits from heat. Capton? Best!

@TRXLab

3 жыл бұрын

Yes it is Capton...

Good job. Theese DIN13 ACC connectors are sometimes a little bit tricky. When I was in the ham radio repair bussiness (definitely leaved it in 2003), this damage was very often on IC-706/706MkI/II/IIG and, as I see, nothing has changed with IC-7000. The design idea where SEND/HSEND/VSEND pins are inputs and outputs at the same time i terribly bad, they know it and they are doing it again and again in the name of compatibility. What happens if the output of the modem/soundcard interface/whatever is not open collector, but it is full TTL output? Nothing till you press PTT on your microphone (or happens any other key-in event inside the trx), because then the forced-high output is shorted by this poor transistor and magic smoke escapes. This is what imo happened. The second typical DIN13 issue was high voltage on SEND/HSEND/VSEND, typically linear amplifier that has more than 13V on its RX/TX switching relay. High voltage on SNDL is then the "nice thing". Almost all transistors on theese outputs are capable to switch 40V+, but the combination with input kills this capability. The third and most tricky thing is possibility to insert DIN13 plug upside down (this is also issue on some Kenwoods, that have the same DIN13 plug, but with different pinout). The pin 13 is easy to bend into the notch in lower part of the socket and the last thing, that should make impossible to insert the plug that way, is the socket's notch corresponding to the bend part of the plug's shielding, but when the plug has a stretchy rubber housing and the bend in the shielding is shallow, it is posiible to insert the plug upside down. I found only one solution. I bought a huge amount of 3-pin DIN5 plugs manufactured by Tesla, that had strong shielding part and rock solid housing and I combined the housing and shielding from the Tesla part with the inner part from easy to buy DIN13 stretchy plug. After this I got the DIN13 plug I was unable to push upside down into the socket.

@TRXLab

3 жыл бұрын

You are right the ICOM design was always a bit funny..Thanks for your exiting report.

Thanks Peter - I have two of these radios - I really like them as they are all bands and separation of front is very useful for mobile installation. I will have to keep an eye on them!! Any tips to be on the look out for? I know that they were sometimes made with very little heatsink compound (for instance). Great video and explanation as usual!! 73

@TRXLab

3 жыл бұрын

niemals über 80 Watt Ausgangsleistung das hilft schon...

Wher you buy your fm 203 whith 220 v input.

Peter: I hope I can ask you a quick question, what is that heat resistant foil your using to shield the rest of the board?

@fa_engineer3687

3 жыл бұрын

I think he said it was Kapton.

@stargazer7644

3 жыл бұрын

Kapton tape.

What air temp do you use?

@TRXLab

3 жыл бұрын

390°C

Another one saved from the round filing basket.

If I'm not mistaken it's not just a CPU but an ASIC.

So the owner accidentally shorted the 14VA supply pin to the SEND1 pin in the connector and Q1102 tried to pull it low? Q1102 is a rather beefy part (the original part can take 2A /50V), whose collector seems to be pulled high by D1102 & R1106 (2k2). Why didn't the manufacturer put a small series resistor or a polyfuse to protect the SNDL signal from an erroneous connector use? Is this designed to directly switch power on some peripheral?

@stargazer7644

3 жыл бұрын

The PTT pins are spec'd to source 200ma max (output), and to sink 20ma max (input). The manual isn't clear if the external device is supposed to limit that current, or if that's the current that the radio draws. It says you can apply up to 20V on that pin. It is a bi-directional pin. It can be used as an input to initiate PTT from an external device like a Packet TNC, or as an output to tell a transverter to switch into TX mode.

You seem to be the one to ask out here with the IC-7000, mine just completely lost tx and rx, the alc is full scale on hf ssb with no audio input, no sound at all not even menu beeps, just a slight pop from the speaker at power-up. I see that this failure is not uncommon, but I'm finding no solutions. The Yahoo group that was, is gone now too. Have you seen this issue, any ideas? It seems like it maybe lost a voltage rail. I spent some time analyzing the service manual, and suspect the 7808 (IC1901) regulator could be the culprit, or a shorted cap etc. That chip seems to be powering most of the analog circuits, the digital side of it is working fine, and I had first thought my antenna, or cable had failed. The radio appears to function normally, aside from the "minor" issue of not transmitting or receiving. I have not gone inside it, or probed anything yet. I did reset the CPU, but aside from losing all of my memories, recordings, and settings, it did not help. (Losing those recordings hurt the most, there were a few now silent keys in there.) It has functioned almost flawlessly for over 10 years BTW, though I did have to replace, and re-bias the HF PA mosfets a few years back.

Achtung, bitte diesen Tipp immer ausführen !!! : Zum IC-7000-Kauf sollten die User stets parallel einen Baumarktbesuch planen. Einen Vorschlaghammer kaufen- alles weitere kann man sich denken :-))).

@TRXLab

3 жыл бұрын

lol

I need to get my 7000 repaired.... it doesn't have any TX power and I don't have time to mess with it...

Thanks Peter, good news that the CPU survived, 73's

@TRXLab

3 жыл бұрын

Thanks for watching

12:26 pointer wand goes off camera!

How do i contact peter.. I have 2 ic7000 out of Order.

hi Peter, ware can i find a cms50 R&S any websites i can look at over there in the father land,, in vk there is nothing

@TRXLab

3 жыл бұрын

hm may be here: www.rosenkranz-elektronik.com or www.instrumex.de/de/product_list

Why don't use a jingle to introduce your video ? Great job, ciao 👋

@TRXLab

3 жыл бұрын

lol yeah

hello peter Kenwood I have a problem with my TS 50 radio.

@TRXLab

3 жыл бұрын

nice radio

@officaleyup

3 жыл бұрын

@@TRXLab yes but there is a problem

@officaleyup

3 жыл бұрын

@@TRXLab sometimes it suddenly goes to 100 watts at 10 watt position and then back to 10 watts why

!!!!!!!!

Hi Peter, writing to you 4th time. I hoped you could repair mine ic7000. Burned driver issue. Any chance for that? 73! sq8guo

It was irresponsible that they didn't use an opto-isolator

@stargazer7644

3 жыл бұрын

It's hard to run a bi-directional PTT line through a one-way opto-isolator.

I hope the CPU output to base was not weakened, only to fail later on. No way to tell.

That isn’t a generic socket, I don’t know how anybody could simply pick up a random wrong cable and shove it in to the wrong hole, even if they’d manufactured it themselves.

@TRXLab

3 жыл бұрын

Kenwood has a very similar one

A easy one...K5AZE

Stop frying transistors people!

@TRXLab

3 жыл бұрын

lol so it is

Its a bad design afterall... a failsave for me would mean stuck in receive and not burn dozends of watt out in the air uncontrolled

@stargazer7644

3 жыл бұрын

If someone puts voltage where it doesn't belong and destroys and shorts the transistor that puts the radio into transmit, its rather unfair to complain that the radio then gets stuck in transmit.

@TRXLab

3 жыл бұрын

The issue is that the transistor should not be in the relay line by design...

Do you know what you call a nun who has undergone sex reassignment surgery? A TransSister.