#168 

Makes you wonder just what someone was trying to do. Good job on locating the problem and fixing it Peter. I enjoyed watching and thanks for sharing. 73

Amazing job, your work is so spot on, and I wish all lecturers had patient people as thorough as you, first class buddy

My guess is they were trying to do the extended tx mod and confused that resistor for a jumper on the opposite side of the processor that gets removed for the mod. Your videos are the best, Peter, I have learned so much from you, and appreciate the time you spend and the detail you go into I would love to see a video detailing the functions, setup, and connections of the R&S communications test set.

Great video. I succeeded to repair my 897, with the same symptoms as in your video. I replaced the EEPROM, but without any change. I remade the soldering at the processors pins and now it's working perfectly again (pin no. 21 and 23). Thank you sharing your experience. 73

I call this craftsmanship. Look at his re-flowing skills. Better than the original.

The "golden screwdriver" strikes yet again. Cheers & 73 from W Rusty Lane K9POW in eastern Tennessee

I have already had such repair attempts on my desk. After asking the owner, I got told by him that someone has already tried to repair. This repair specialist has soldered a wire to the supply positive pole and then tried to reactivate all the connections of the µC with the other end. "Devibrilator method" .... incredible thoughts go around in the head of some people ..... Well done Peter! 73 and a nice weekend

Just amazing how you fix all these rigs! Wish I have such a huge know how! Respect!

How lucky are the OM who live in your area, i am envious :) Thanks for sharing Peter this professional video. Wish all tech guys were like you ! 73, Chris

Thankyou for posting this I have a FT897 with an identical fault except the pads for data and clock have been ripped off the pcb and eeprom missing

What am mess! Flux-free solder attempt with a banggood 3USD iron... SMT is no plumber playground! You did a good job Peter, and still quite calm! As i dont like coffee, i had to drink some real strong black tea cups and some spheric music in the background to rework that thing... Respect!

Another great video, I always enjoy watching and learning.. Thanks

Another great repair Peter, I just love clearing up after have a go heroes. Everyone thought that the advent of SMD technology would stop amateurs playing, sadly from what I see it seems to have had the opposite effect. Keep up the good work.

What a mess nice job repairing that radio Peter awesome work big thumbs up mate

Wow indeed my friend, it seems whoever attempted the repair before you did not know that a hammer & chisel was not the correct tools for this job 😁 Another great repair here Peter. Cheers friend, John.

Very nice! Well done job, like to watch your videos

Truly talented work!!

Thank you so much once again TRX Bench that was so enjoyable, and educational. Thank you.

To be honest YT algorithm has led me to you fixing other "shops" repairs, and it's quite depressing, really. On the other hand that's how I managed to get my hands on a nice transceiver recently, so I should be grateful maybe :)

Hallo Peter, vielen Dank einmal mehr, für Deine große Mühe und Deine Expertise !! Einmalmehr ein sehr gutes und aufschlußreiches Reperaturvideo von dir !!! Ich sehe diese Videos mit großem Interesse immer wieder gerne !! Hab eine schöne Zeit, bis Bald mal wieder vy 73 es 55 de Ralph DB 9 FQ C 31 KM

very nice fix. I have a radio that was fixed by a novice and was just like this one you fixed. good job showing it all to us.

That was an amazing video! Amazing job! Subbed 🙏

You are a riot, Peter. I always enjoy your videos. Definitely worth the price of admission. ;-)

You zeroed in on that fault very quickly, one might even say that you had super human deducing abilities, I guess we need to get you a cape and a T-shirt with a big 'S' on it. As always great job and thanks for sharing.

Some people have no clou and mess around, I see that all the time. We need more old school professionals like You. PS I like your video's

Excellent video. Very good methods and very concise. Thanks for sharing Peter, 73s

As always nice repair Peter.

Another good one Peter! I can't wait for the next one, '73

Good Morning Peter, Yes I did enjoy the presentation and your fantastic video on the radio. The parts are so small for that 47k resistor and you're good understand how to place the part in their correct orientation, all by reading the schematic. 73 de Dennis

LOL, worst part of working on so many different makes and models of radios is we never have them on the bench long enough to learn how all the features and functions. Just turning on a radio and selecting a frequency and mode can be a challenge without the operating manual with some of the newer radios. Really have to wonder what the heck someone was doing to that poor chip. Looks like a miniature beaver was chewing on it. Luckily it just needed to be reflowed and a new resistor.

I like how you look at the block diagrams and do the troubleshooting in your head before you even open the radio.

You are a really lucky man. As far as I know that EEPROM holds not only the memories and user setup, but also a callibration data, which is why radio does not work (or look like deaf) when the EEPROM is failing in some way. If something destroys that chip (or for some reason this chip becomes a little bit sclerotic), you have to go through the whole factory alignment procedure when this chip is replaced. So you are really lucky you do not have to go through this long and terrible procedure. The missing resistor is pull-up resistor for one of the line between the MPU and memory. That pins are open-collector type, so they have to be pulled up by some resistor, that's why the MPU was not able to communicate with that EEPROM.

Nice fix Peter and well spotted as always. I have no idea why someone would mess there. Maybe they were trying to do a wide band mod and removed the wrong resistor. Great job

Great methodology. Thank you

I did enjoyed the video Peter, keep it up the good work. 73s

Great Vid and hope all is well on that end.Thanks

Great video and a good job. Thumbs up.

Danke Peter, I enjoy learning from you and another site from Louis Rossman in the process of reading schematics to repair electronics. The process is very helpful for my future repairs on my bench. Sehr gutes. Grusse von Houston Texas. J K

Peter another fine mess you have to sort out it looks obvious somebody didn't seem to know what they were doing some people should leave repair work to engineer like yourself another success peter :)

good job peter, the chip was nearly ruined. you saved it, from mishandling.

Great job, Peter.

HI there, thanks for the great video. Which flux were you using? I'm using liquid but that gel stuff looks great. Do you need to do a rinse after use? Keep up the great videos.

I find also some awful works made to poor transceivers on my daily work fixing them. Good job !!!

Super Peter, well done

What is the solution you used on the pins just before you used the iron for the reflow?

Good job Peter. It looked like a skitzing speed freak was scratching on the pins. He just needed to scratch them in the correct sequence...lol I wouldn't trust that EEPROM.

Another good one Peter. Like Buddy said below who knows what went on.

Great work,what ever some hacker does you always fix it,, thanks for video, hope to see you again. looks like your dressed warm cold in shop ? have a great day Peter

That resistor was the pull-up for the serial data line. Without it, everything is input/output as zeroes.

Well done guy

Great video, thanks !! :)

Ok I have the same startup symptoms. I replaced the EEPROM, but no difference, I am tempted to replace it again. Did you have any suggestions? I would send the radio to you, but the freight will be high. Many thanks.

For the newbies it might be interesting, why this missing resistor screwed the hole radio up? SDA and SCL are the two lines that connect the EEPROM to the CPU. This is a so called IIC or I²C bus it is multi-master capable. So multiple chips on that lines may talk to each other (one by one). To avoid shorts caused by one chip pulling a line high while another chip tries to pull the same line low, the line is pulled high by a resistor, while all chips are only allowed to pull the line to ground. If this resistor is now missing, the line is floating around and all chips listening are just reading mostly illegal levels. Btw. this is a common fault even in TV or audio equipment, that a broken resistor or a dead chip shorting one IIC bus line is causing a whole device to fail completely.

Maybe the "repair tech" just had a wood burning iron? Another nice repair for the Petermeister! Thanks for sharing...Dan w4mnc

Hi Peter ,looks like the golden screwdriver operators are still about, I suppose they are keeping you busy , another fine repair even by you though it was a shocking discovery. 73 Paul M0BSW

I have the same mess on my FT897. Will be working on this shortly..

Excellent video.. the worst thing you can fine inside a radio is human footprints. You need to tell the owner what you found. 73

Good fix Peter. I wonder who had been inside before?

Ya I had a 857D and an 817 both had processor issues I stayed away from them since then wonder what someone was trying to do with that memory chip

My FT-897 all of a sudden has No Transmit. I've tried different mics, disconnected all external devices etc. No Red LED Transmit at All. Everything else works fine. Would this be the problem?

As usual I can't wait for the next one, coffee is already on. VP9IN...

Simple and successful repair (and inexpensive for that lucky owner). But I'm wondering, what have they tried to do on that EEPROM ???. Brute people.. xD When removing a faulty used transceiver housing covers you never know what kind of surprises and brutalities await you. xD

I wonder whether the person who "repaired" that radio had originally put 2 pull-ups in there, but one had a couple of cold solder joints and just popped off? There might be an 0403 resistor floating around in that case somewhere. lol

Hope who ever did that repair has watched your video, that would be embarrassing hey, good vid Peter 73's

At 06:20, why is there a little figure in the lower right display running? Jogging mode? Have a good Sunday.

Looks like some through-hole solder bandits got into the radio and jacked some shit up!

Great fix well dune ..

fine job , thumbs up :-)

I'm think someone had the cover off and dropped something onto the board. That caused the damage and the resistor to come off. Then of course that person never found said damage (or made a botched attempt at a repair).

Great video. It was an education for me. How could somebody screw up a radio the way that guy did? KU3X

There sure are some " Butchers " about Peter when it comes to repair work , That was awful soldering , People who mess up a nice radio like this because they are awfull solderers should be banned from owning a soldering iron 😁 , You were very lucky indeed in that it wasn't any worse , Very lucky indeed Peter 👍

Amazing that someone would remove that resistor and then give up on the repair! Every part is needed, cant leave one out and expect it to work

MTQMB is your quick memory bank which it should not be on unless you require it for quick memory use MT is when it has been moved from the quick memory bank on the via phone off but still holding approximately the same frequency do you need to press V/M and use the VFO and then see if all of these memories and the use of the radio functions personally I would give it a full reset and then play with this. Regards Jeff

Brilliant Peter, someone make a hash of that hi

very good video

Hi Peter, Wonder who had their fingers in there? WB3BJU

I have this, my radio is facing start up problem, not getting start, relay sound is audible, screen light is illuminated slightly, please suggest, what I should do, VU3SQY, #Ascertain

my 857d does the same thing. I have to factory rest it after I have shut it off.

great job, most in formetiv

Yet again Peter, Bob's your Uncle.

Makes me wonder why people that bring a radio to you try to hide information. Makes your job much harder than if they would just tell you exactly what happened and what someone tried to do.

Am I wrong? At 31:46 there seems to be a component missing.

Nice job repairing someones elses BOTCHED attempt ! Love ur videos ! 73 N8AUM

Maybe the eprom was replaced and the person didn't do a very good solder job and then just gave up. Good video Peter...

WOW, I once saw a guy who added a ton of solder with a big slater's soldering iron and almost melted the processor on a brand new FT-1000 as he wanted to "make the solder go deeper inside the board to get the CB band on" (don't ask me why please! ^^).

WTF where they trying to dig under the chip for gold?

bei meinem FT 897 macht das Display Probleme ... Ich habe drei bis vier vertikale Streifen im Display ... Leider ist das Display und auch das Panelunit als Ersatzteil nicht mehr erhältlich ... 73 de DL6RDE, Charlie

And voltage is displayed like 0.0V

I wonder if these messed-up radios get 'laundered' (sold-on and bought) before they're sent in for repair. Based on what Peter is saying, it seems that his customers generally have no idea what's going on inside their radio (i.e. as if they didn't do it). Otherwise wouldn't they confess their sins to help get their valuable radio fixed more efficiently? I hesitate to assume that Peter's customers are not being honest with him, so cases like this must be from the used equipment marketplace. Maybe. Sometimes. Perhaps. Speculation.

Good video. I dont like the 857 or 897. Pain in the butt.

So many butchers out there, so many issues caused by people doing very odd things!

Perhaps someone thought they were doing a wideband modification, but in the wrong place! What a mess!

I'm pretty sure everybody is thinking the same as me. What the hell?! There seems to be no reason for someone to be messing around with the eeprom. A simple fix in the end at least.

You should charge double any time there is evidence someone else was in there before you.

I enjoyed it,---------------------------------------------------a bit.

Of course no one admits to doing this butchery, so it must have been done by irate faeries, not the owner. I'll believe that.

that was unbelievable. What a random act of foolishness to damage a working unit! No logic at ll to that. Did someone just need a resistor?? lol

Looks like somebody try to fix an amateur radio in amateur way