We had some fun in this Live Dojo Workshop! We went beyond the screen into the big, scary Real World and showed off live a few things about BLDC fan motors, including:
BLDC fan motor wire color conventions
Expected readings on PWM and RPM feedback lines
Simulating a PWM signal
Identifying failed speed sensor
...and more! Click below to watch the workshop recording -- viewable only by premium tech members.
If you're an Appliantology tech member and y
DC power in appliances works the same way no matter the manufacturer, but everyone has their own way they like to talk about it. And if you're not up on the lingo, you'll be left mystified by DC circuits in schematics.
You don't have to worry, though, because we explain all kinds of DC terminology in this latest workshop. From VDC to VCC, we cover everything you're likely to encounter in your troubleshooting travels through DC power, including:
Terms for DC voltage supplies
T
Refrigeration is its own little world within appliance repair. The presence of a sealed system introduces all kinds of specific knowledge and skills you need to have to properly troubleshoot these machines, from thermodynamics to compressor technology to brazing. And that's not even mentioning the other systems, like airflow and control.
So how do you learn all this stuff? Well, if you want to troubleshoot refrigerators like a real tech, you'll need both brains-on and hands-on trainin
What are strip circuits and how do you read them? What purpose do they serve in troubleshooting? Are they better than normal schematics, worse, or just different?
That's what we explore in this workshop, which is an excerpt of the discussion from one of our latest Live Dojo workshops. Parallel to that, it also acts as something of a part 2 to our previous workshop on DC terminology. These schematics that we show have a number of esoteric and straight up confusing DC terminology, but don't w
When it comes to switches in appliances, it's hard to think of one more ubiquitous than the relay. It can be used with and without a control board, and it allows a small voltage to control a much larger voltage. But what exactly does that mean, and how do they do that? And what about triacs, the relay's solid-state cousin?
We cover both of these devices, including how they work and how to troubleshoot them, in detail in this excerpt from one of our recent Live Dojo workshops. Give it a watc
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Master Samurai Tech and Appliantology help service techs and companies to be profitable year ’round!
We’re celebrating Thanksgiving and repair excellence with a Black Friday discount.
Get 10% off everything. It’s never been a better time to enroll in a new course or renew your membership.
What do we mean by everything? Well, everything, which means:
Appli
When a control board doesn't seem to behave the way it's supposed to, does that mean it's always time to replace the board? How do you avoid the dreaded callbacks on service calls where you replaced the board because you had no idea what else to replace? Is there a way to reliably troubleshoot computer-controlled appliances and avoid guesswork when it comes to the control board?
Of course there is, and Team Samurai is going to show you how!
It all boils down to understanding how these
Timer charts may be for old-skool appliances with mechanical timers, but there are still plenty of old-skool appliances knocking around, so reading timer charts remains a vital troubleshooting skill.
That's exactly what we cover in this workshop: how to cohere the timer chart and the schematic, reading them in tandem. Kind of like they're dance partners in the Timer Chart Cha-Cha!
Topics covered in this workshop include:
How to decipher the rows and columns on a timer chart
This microwave will run with the door open -- lucky for the customer, it also doesn't heat. But why is the turntable able to run with the door open? What do you do when a circuit doesn't work at all the way it's supposed to?
That's exactly what we discussed in our latest Live Dojo workshop.
Topics covered include:
Microwave door interlock switches
Turntable motor circuit analysis
Control board algorithms and relays
Theorizing a reasonable failure scenario
Reading timer charts may just seem like an old-skool skill for a bygone era of appliances, but there are still plenty of these old workhorses around that need troubleshooting. Plus, analyzing these circuits teaches you a lot of schematic mojo that is useful in all areas of appliance repair.
In our latest Live Dojo workshop, we worked through how to read this timer chart and schematic in harmony with each other. You can't understand the schematic without the timer chart, and vice versa. Topi
By Rhubarb Tau in Rhubarb Tau's Sloggy Vlog Blog Bog3 comments
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