Susan Brown

[Susan Brown]

It’s first described in the Transformers unit (Module 4)

https://my.mastersamuraitech.com/module-4/basic-electronics-transformers/

There’s one word that can be used for the answer.

Let me know if you figure it out!

[Susan Brown]

Good question!
The Midterm exam, as you experienced, is pretty challenging. It requires really stepping up your game after just taking the multiple choice quizzes. That’s why we created that study sheet.

The Final exam is not quite as challenging in that way. It is largely based on the quiz questions that you encountered through the course. The biggest difference is when you get to the Open Answer exam and have to write definitions and do a few calculations on your own. The final exam has a higher first-attempt passing rate than the Midterm, if that helps you feel better! But you still do have two attempts.

So the best way to study is to review each unit and quiz, to refresh your memory. If you’ve been keeping a notebook, that will help as well.

[Susan Brown]

Those are correct – good job! (Note – I’m going to hide the answers so we don’t give them away)

[Susan Brown]

The water level info is still transmitted to the main PCB (you can see that clearly when you look at the photo of the board), but because it first goes through the sub PCB, it is a little ambiguous as to what constitutes “direct input”. So we’ve decided to remove that as an answer choice to avoid confusion.

[Susan Brown]

I understand which ever side you get zero is where your problem is

Yep! 🙂

[Susan Brown]

You are all set now! I just sent you an email.

[Susan Brown]

yep!

[Susan Brown]

Hi Scotty,

Electric dryers have some of the most interesting schematics, because the elements need 240vac (L1-L2), but the motor just runs off of 120vac (either L1-N, or L2-N).

Look at the motor on the dryer schematic (the bottom one – the top one is for the washer). The neutral line comes in from the top, and the hot line comes in from the left on the brown wire. Do you see that, and whether that is L1 or L2?

[Susan Brown]

This is a perfect question for the Dojo at Appliantology. There have been previous conversations about home warranty companies. Search for those threads, or start your own. We do not have direct experience with home warranty companies, but a number of our members do, and apparently some are okay and others are terrible to work for.

In general, a small percentage of warranty work (either kind) can be useful in getting you experience and connected with customers who will hopefully call you for any COD work they have in the future. You just need to proceed carefully in terms of which companies you connect with, and don’t ignore building your COD customer base through other means as well.

[Susan Brown]

The hardest and most valuable part of appliance repair is doing a correct diagnosis so that you know which part to replace, so that’s where we focus our teaching.

Actually replacing the part is normally straightforward, and there are instructions provided by the manufacturers and/or tons of free videos on YouTube showing the parts changing.

See this article at the site for more info:
https://mastersamuraitech.com/hands-on-appliance-training-resources/

[Susan Brown]

1.Very important not to mix up voltage and current!

From Unit 7:

The three most common electrical measurements you’ll be doing as a professional appliantologist are:

– Voltage, either DC or AC
– Resistance and its daughter test, Continuity
– AC current, which is always done with a clamp-on amp meter (or ammeter). (Note: You will never need to measure DC current in appliance repair.)

2.From unit 9:

– AC does not have a polarity in this sense because its current direction is reversing 120 times a second. Instead, in AC, we talk about the hot wire and the neutral wire. That’s why when connecting wires to an AC component like a solenoid valve or switch, it doesn’t matter which wire goes on which terminal.

[Susan Brown]

Hi Mike,

We don’t have enough first-hand knowledge to give you a firm recommendation. We do have students who will combine our training with an on-site school like Fred’s or Dyer Academy. They are both reputable schools. But because it’s quite a lot of money, most of our students find other ways to get hands-on practice, either by working on appliances for friends/family, acquiring used appliances to practice on (and maybe sell), etc., or by working for an appliance repair company for a few years or so before branching out on their own. Some people we train just jump right into offering professional repair service and basically learn on the job!

[Susan Brown]

We’re always glad to help!

[Susan Brown]

Take another look at the video in Unit 6, especially the slide starting a little before the 3 minute mark. The voltage on the primary side is very high – 2400 to 12000 volts, so putting the 240 one wave there wouldn’t make sense.

The 240vac supply doesn’t ever actually exist. We only induce it by having a circuit with L1 and L2 as the power supply. The difference of L1 and L2, since they are 180 degrees out of phase, creates the 240vac. That’s what the black line you’re talking about is showing.

You don’t really need to understand it much more deeply than that as an appliance tech. However, here’s a more detailed paper talking about power supply that you can download if you’re interested.

https://appliantology.org/files/file/3147-120-and-240-vac-single-split-phase-multi-wire-branch-circuits/

[Susan Brown]

I have multiple electronic books, but I have yet to find any sinusoidal drawings of our 120/240 split phase systems. At the moment, I do not have one to reference that system.

Most electronics books don’t spend much time talking about AC power supply, since electronics are generally only concerned with DC.

If you do a search for split phase power you can find all kinds of sine wave graphs. Here’s another cool one:

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