Uni-T UT61E+ Meter Resistance Locates Bad SMD Components For Amplifier Repair Finding SMD Data

Uni-T UT61E+ Meter Resistance Locates Bad SMD Components For Amplifier Repair Finding SMD Data

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00:00
[Music] hello and thank you for tuning in to ellensburg amplifier repair and service today i wanted to go over a little bit more about using resistance in locating faulty components as you can see here i have a new uni-t ut 61e meter here in addition to my fluke 87
00:33
uh i i did a video on this for you guys but i ran into a little problem so i probably won't be putting that video out so i i'm making a new video about this my goal was to be able to connect the meter to the computer to show you guys how i use resistance to locate faulty components and amplifiers and i know what i have here is not an amplifier
01:07
but this is a absolute perfect example of how to use resistance to find a fault and a device so yes it's true i do work on things other than amplifiers but i just don't uh repair them as a business other devices just example there's all sorts of instances where you have to look up ics and parts and replace
01:37
parts and stuff so what i'm going to go over today is uh is how i go about using resistance and looking up components so for this example of using resistance to find a fault it's really hard to see but down on this board there are two ics here five pin ics that lead out
02:08
to each bank of relays and i'm going to show you how i used resistance and not particularly the diode check to find a faulty component so i'm going to turn on this unity ut61e meter here and unfortunately i can't hook it up to the computer to show you guys on screen the readout of this but if any you guys have any ideas
02:43
on how to make this work with windows 10 please feel free to let me know or get a hold of me windows 10 will not recognize the protocol of the ic that this usb adapter uses i've looked into that i mean if you guys want another separate video on that please feel free to ask
03:18
but i spent hours researching the ic in this its protocol and how windows just doesn't support this protocol so please let me know if you have a solution to that so uh what i'm going to do is i'm going to show you the resistance except these are 20 amp probes here so i'm going to switch over to my 10 amp needle probes which helps get into these smaller ics a little bit
03:54
better so let me just switch over to my 10 amp needles here so on this device on test.2 i had found that i had two open uh 100 ohm resistors this was reading like 1.2 mega ohms is what this was reading before which leads up to this 5 pin ic so this this 5 pin i see is reading
04:38
about 236 ohms while the neighboring one which is an identical copy reads uh 1.4 k and if you're to go to diode check on this you will see that on diode check it doesn't give you that constant b that it has a short because each meter has a range to where it'll tell you if it's shorter or not so that's why on amplifiers a lot of times i like to
05:18
use resistance so as long as you pay attention to the resistance that you're seeing on the components that you're testing it gives you a good indication that that component is bad so that's just one example of using resistance instead of the diode check it you really have to understand uh how diode check works the voltage that's applied across it to understand the reading that you're getting on the meter
05:54
again i hope to have on display uh soon the readout of a meter for you guys and then i just wanted to quickly go over this ic i see a lot of people ask online you know they have an identifier each each uh each smd component has an identifier but then they'll ask well what is it and you can spend just an absolute amount
06:28
of crazy time online trying to google an identifier for instance this five pin i see here is labeled hkj and so please feel free take a minute go online go to google and search for a 5 pin hkj and i will bet unless you've been doing this for a while i'm going to bet if you're new to this you're going to spend hours or probably not even hours because
07:00
you'll probably most people if i just give up i'm trying to find it and just post something online um but there are resources out on the internet that will just point you to the right direction fairly quick and there's one resource that i would like to point out to you guys about finding these ics so there's a website here that you see
07:30
sure it shows you a picture of a vacuum tube on the home page of this of this website but if you look up at the top there you're gonna see a line called smd codes and if you go and click on those smd codes and this 5 pin i'm looking for is hkj so i'm going to go over here and click on h and i'm going to scroll down
07:59
and see if he has an h k j let me just find the k's here h k j here it is right here so h k j it's a saw 23 5 pin i see and here's the part number to that it's an 80 8009 jrt dash r2 again
08:35
that's going back to this website here uh with the urls down in the lower left hand corner there for you guys that's just a quick run through that website um as a reference to find ics and there is a plethora of information on that website uh for all you guys that do repairs or if you're looking for a part uh that website is an absolute goldmine
09:07
of information so that hkj came back to being a analog device 1 gigahertz amplifier in 88009 and sure enough if you were to follow the pin out of this five pin uh saw 23 so here's your pin one which is your output and you go back to the circuit board and
09:47
that pin one right there went to those parallel 100 ohm resistors that were open so that really tells me that i'm on the right track right in the finding the right ic and just to back that up even further that that website pointed me in the right direction here's the branding which i call uh i call them identifiers so this one here
10:21
branding well there it is h k j so then i knew i found the right i i had found the right ic to repair this channel uh on this device here so again that's hkj it's an 8809 and then it goes back to well unfortunately you're not going to really find an ad8009 uh i see
10:57
but if you go to mauser and type in that part number you're going to find that they have a great cross-reference uh selection to that i see so so i got that in my cart but just to verify this device i'm actually going to take the good five pin and swap it over to the bad five pin and see if channel one fires up for me here so that was my just quick rundown of finding a bad component using resistance identifying the
11:30
component going to what i consider a great resource to identify the component which then you can pull up the data sheet to verify what you found which again and that's a great reference so again if anyone knows anything about this protocol it's a infrared protocol which windows sets it up as a human interface device hid please let me know i'd hate to buy a
12:04
meter that i'm just not going to use uh if i can't get it to display i have a fluke 87 that does all my work for me here so i just wanted to get something on the screen for you guys so stay tuned i will be back with you guys like this content please like and subscribe if you have any questions please feel free to contact me email me my website ellsbergamplifier.com
12:35
and i also now have amplifier parts that are listed on the website uh i'm adding more parts as i can get time to get those parts listed and if you have any parts and requests again please let me know thank you for watching catch you on the next one

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