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!
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.
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
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
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!
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
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
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
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.
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.
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.
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.
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
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?
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.
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 :-))).
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.
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.
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.
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!
Don't worry go your way and you will gain your knowledge anybody needed time to get to the wanted level...
Practice Practice Practice !!!
same for me despite of 42 yeras of amateur radio ....
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!
Thank you
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.
Thank you
Nice repair Peter, the magic smoke helped this time.
lol yes in this case..
Thanks Peter, I enjoy watching you work through the problem
Vielen Dank
Some good luck for the owner, probably thanks to one of the fastest fuses on earth - the silicon junction transistor!
Fuses open. The transistor shorted.
Great to see you back 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
very good glad that you really like it..
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.
ja das ist wohl wahr selten sind die Fehler so offensichtlich...
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
No worries, Olaf you are never late we all have our things to do. Thanks for comment. 73 from Peter
Hi Peter,
Nice repair. Luck was with you this time the CPU was not damaged. Stay safe. 73 WJ3U
Thanks Don
That was super enjoyable. Thank you for sharing the project. It is much appreciated.
Thanks for watching
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
You are absolutely right my friend! Thanks for feed back
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!
Thank you! Yeah it is critical to tie CPU ports directly to external sockets.
Nice easy repair 👍👍👍
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
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
lol yeah that is what you need on stock if you are dealing with Icom
Nice repair Peter! Thank you. 73
Nice job fixing the radio I wish I had your knowledge keep up the good work
Thank you
Another fun and nice repair peter, i enjoyed seeing you along the repair. See you in the next one )
Thanks for feed back
as usualI loved your video. Thanks for including the schematics and the diagnostic thought process. Thanks for your efforts :-)
Thank you glad that you liked it!
Nice to see that you are back! All the best!
Great work Peter
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
Das freut mich Maik das es dir gefällt und herzlich willkommen in dieser Community! 73
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.
yeah really glad that the CPU survived
Thanks Peter 👍🇬🇧
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.
You are right the ICOM design was always a bit funny..Thanks for your exiting report.
Nice job Peter .
magic SMOKE :-) LOL . Thanks Peter !!!
Thanks for watching
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.
ah good to hear. Thanks for feed back..
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.
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.
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.
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
niemals über 80 Watt Ausgangsleistung das hilft schon...
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?
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.
Thanks Peter, good news that the CPU survived, 73's
Thanks for watching
Nice one Peter, thank you !
What do you use to shield the circuits from heat. Capton? Best!
Yes it is Capton...
Another one saved from the round filing basket.
If I'm not mistaken it's not just a CPU but an ASIC.
Good job. Always wanted one of those radios. 73 de KD4HCT
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.
I need to get my 7000 repaired.... it doesn't have any TX power and I don't have time to mess with it...
Great vidéo Peter 73's!
thanks you
very good video. simple fix.
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
Great Job Peter :)
Good to see you Grant! Thank you
Wie immer, tolles Video Peter. 👍👍
vielen Dank fürs vorbeischauen...
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 :-))).
lol
How do i contact peter..
I have 2 ic7000 out of
Order.
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?
I think he said it was Kapton.
Kapton tape.
Great explanation!!!
Thanks
12:26 pointer wand goes off camera!
Wher you buy your fm 203 whith 220 v input.
I hope the CPU output to base was not weakened, only to fail later on. No way to tell.
Thank you!
Why don't use a jingle to introduce your video ? Great job, ciao 👋
lol yeah
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
hm may be here: www.rosenkranz-elektronik.com
or
www.instrumex.de/de/product_list
hello peter Kenwood I have a problem with my TS 50 radio.
nice radio
@@TRXLab yes but there is a problem
@@TRXLab sometimes it suddenly goes to 100 watts at 10 watt position and then back to 10 watts why
very nice!
What air temp do you use?
390°C
Hi Peter, writing to you 4th time. I hoped you could repair mine ic7000. Burned driver issue. Any chance for that? 73! sq8guo
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.
Kenwood has a very similar one
It was irresponsible that they didn't use an opto-isolator
It's hard to run a bi-directional PTT line through a one-way opto-isolator.
!!!!!!!!
Stop frying transistors people!
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
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.
The issue is that the transistor should not be in the relay line by design...
A easy one...K5AZE
Do you know what you call a nun who has undergone sex reassignment surgery? A TransSister.