Great repair again. I am amazed by your skills. The way you explain things and your logical approach to the problems are outstanding. Well done sir. 73’s Lynton.
What a superb video. Beautifully shot. Excellent presentation. Clear and precise walk through of the tracing, detection and repair of the fault and the logic employed to do so. A tiny bit of frustration that the most critical part -- removal and replacing of the tiny parts involved -- could not be filmed but that was entirely understandable in the circumstances. All in all, a fantastic piece of work, explanation and lighting/filming and all done by someone using English as a second language. Brilliant.
Awesome Peter, So small these ic's. I enjoyed when you fixed the radio," your happy voice came on"! Thanks you for showing how you came about diagnosing the problem with the different voltage.
+Alan Cordwell Hi Alan, yes you are right I also recognised it on the video but it was not there in the lab. I wonder where it comes from?? Thanks for watching buddy!
Just so you know, I have actually monitored heat soak through to the opposite side of a PCB and even when one side is thoroughly heated (such as with extended IR preheating an entire side) the opposite side is pretty reliably 20-40C cooler than the heated side. So, if you raise your component to the necessary temperature for desoldering the component you should ordinarily still be very safely below the melt point on the opposite side. The notable exceptions would be boards with very heavy nearby via stitching (such as high current and some microwave boards) or metal core circuit boards (such as those used with high power LEDs or transistors where the heat must pass through the PCB to a heatsink on the opposite side). However, when you need to secure SMD components to ensure they can not be knocked loose, silicon adhesive Kapton tape will serve one well as it is unaffected by typical soldering temperatures and will not cause any damage (it releases cleanly and easily).
would have enjoyed it more if we had seen the unsoldering and replacement with new part i can't imagine working with such small components myself so maybe in a future video you could cover the whole process
+iron man Hi, I totally agree with you but this work needs to be done under the microscope and that doesn't work with the camera. But be assured we are working on a solution to do it better in the future. 73's
Nicely done! Very thorough. I was able to implement your solution to the icom 735 encoder with the help of the diagram you sent. It seems I am learning a lot from you.
+Irishman1127 Hi George, hey come on you are a fantastic radio technician! Great custom radios comes from your bench!!! Thanks for nice feed back, glad that you like my vids! 73's
Hi Peter, Super Video, bei mir war der VHF Q552 (3SK291) defekt, leider war nur ein Äquivalent mit gespiegelten Beinchen zu bekommen. Da dieser unter der LP ist, mußte ich den TRX auseinander nehmen und den FET kopfüber einlöten und die Beinchen verlängern. Sehr defiziel. An die UHF-Seite kommt man ja noch gut ran. 73 DL1RNO
+Jurij Hinze Hallo Jurij, oh gab es den Originaltyp nicht mehr bei ICOM?? Das ist wirklich komisch. Ja wenn der kopfüber eingebaut werden muss ist das wirklich ein Problen. Na ja wenn das Gerät wieder funktioniert ist ja alles okay. Vielen Dank für Deinen Kommentar und Deine Rückmeldung! beste 73 Peter
Great video Peter, as always! Interesting though that Icom don't distribute semiconductors in ESD shielded bags? Before you removed the amplifier you could hear some noise at the injected signal. Just as you can hear from a stressed amplifier, that was my clue. ;) But again, nice explained and well gone through. I lift my hat off!
I was wondering if you checked the voltage at pin 6 of the new amp chip? I suppose the bypass cap also could have failed and dragged down the voltage. Turned out the amp chip was the problem. Interesting how the huge signal did not blow out the pre-amp transistor! One would have though that would be the first to go!
good morning friend peter you would not have the eeprom data from ic7000 my radio has corrupted the data now I'm grateful for your attention for 73 do antonio brasil
Would it be worth obtaining or making suitable tips for your hot tweezers so that you can remove tightly packed parts such as small ics or transistors without the hot air gun?
Hallo, das ist dann Deine Entscheidung und auch gut, ich wollte Dich wirklich nur aufmerksam machen, denn es wäre Schade, wenn Menschen wie Stefan Raab Dich verunglimpften denn Du hast echt was drauf!! Lieben Gruß Hermann
+Hermann Kovert Hallo Hermann, alles okay ich habe kein Problem mit Kritik. Trotzdem muss ich Entscheidungen treffen, genau das habe ich getan. Vielen Dank für Deine positve Beurteilung meiner fachlichen Qualitäten. Viele Grüße
Hi Peter sorry what i mean is the frequency on receive on 2mts and 70cms is 3 khz out on receive, but hf seems ok, is there a pot adjustment or something to realign it from Fred.
Hi Peter i am a bit desperate i need to know how to set the rx frequency on 2/70 on an IC 7000 can you help, sorry for asking questions hi...Fred in UK.
Hallo, Deine Videos sind ganz große Klasse, wirklich "Great Craftmanship" aber Dein Englisch ist echt zum fürchten, ich würde mir wünschen, Du würdest die Videos auch auf Deutsch machen. Well sorry for the complain, but do yourself a favor and try to impove your english, please, not for me just for yourself. Ich hoffe, Du verstehst das jetzt richtig. Lieben Gruß Hermann
+Hermann Kovert Hallo Hermman, verstehe Deine Intension, aber auch wenn mein Englisch echt zum fürchten ist, werde ich es so beibehalten, da ca. 85% meiner Abos aus dem nicht deutschprachigen Raum sind. Wenn ich also nur noch in Deutsch diese Videos machen würde, würde ich meinen internationalen Zuhörern vor den Kopf stoßen. Da dies eh schon ein Spartenkanal ist wäre das keine gute Idee. Leider bin ich auch nicht in der Lage beides zu machen oder mit Untertiteln zu arbeiten, da ich leider dafür keine Zeit habe. Hoffe das du dafür Verständnis aufbringen kannst. Trotzdem danke für deinen Kommentar. Viele Grüße
so much talking no enough physical diagnostics. talk wile you work with tools in hand. i hate flow carts. flow carts just like i used when working on cars. i truly hate flow carts, not fully drawn out schematics. i'm just a hands on person. i pick up on what's gong on. it's like being talked down to otherwise. it's me, not you. in other words; a chalk board is boring. and spending time over it. i had a hard time staying awake.
Ha Ha Ha yet again getting the credit for someone else soldering work. You're not pulling the wool over my eyes. So you can't solder on camera but can do everything else perfectly fine on cam lol. Thing is why not, you have both hands free to do the job and not have to hold the camera in place while doing the work. Great job though to the original person who replaced the components. Really is a shame that certain individuals cant give the credit when its due but take it all for themselves. Absolutely disgusting and disrespectful.
