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      Webinar Recordings Index Page   10/03/2017

      On-demand appliance repair training videos for Professional Appliantologist members Over 30 hours (and growing!) of original, high quality appliance training webinars developed and given by yours truly are at your fingertips, on topics you won't find anywhere else. Fill in those knowledge gaps, strengthen those areas of uncertainty, and boost your skills. Watch on mobile or desktop at your convenience whenever, wherever.  Ultra Short Primer on Basic Electricity, Circuits, Ohm's Law, and Schematic Reading (Length: 1:04:48) Basic Refrigerator Troubleshooting (Length: 1:10:45) Schematic Reading Workshop, 10/2015 (Length 1:19:08) Troubleshooting Strategies for Computer-Controlled Appliances (Length: 48:34) Semiconductors and PN Junctions (Length: 1:04:37) Appliance Temperature Sensing Devices & Technology (Length: 1:27:33) Voltage Measurements, Meters, Ghost Voltages, and Triac-controlled Neutrals (Length: 1:29:32) Troubleshooting with Tech Sheets, Part 1, 4/2016 (Length: 1:09:26) Troubleshooting with Tech Sheets, Part 2, 4/2016 (Length: 1:21:11) Tech Sheet Review, 4/9/2016: Bosch Speed Cooker, Amana Refrigerator, GE Glass Cooktop Range (Length: 1:22:58) Pulse Width Modulated (PWM) Switches used in Samsung Switched Mode Power Supplies (SMPS) (Length: 27:07) PWM Computer Cooling Fan in a Whirlpool Refrigerator (Length: 14:53) Understanding AC Split-phase Household Power Supplies (Length: 52:41) Troubleshooting a Samsung Electric Dryer without Disassembly using Live Tests and the Schematic (Length: 22:47) Troubleshooting a Bosch Dishwasher No-Heat Problem using the Schematic and Live Tests (Length: 15:38) Linear Motors and Linear Compressors (Length: 55:54) Bi-directional PSC Drive Motor Systems in Whirlpool VM Washers (Length: 56:52) Appliance Service Call Structure and Troubleshooting Strategies (Length: 1:00:16) The Ten Step Troubleshooting Tango and Workshop Exercises (Length: 1:35:39) Troubleshooting Ten-Step Tango Advanced Workshop (Length: 1:32:06) Ten-Step Tango Troubleshooting Workshop: Refrigerators (Length: 1:35:57) Whirlpool Duet Washer Schematic Analysis & Whirlpool Dryer Moisture Sensor System (Length: 1:03:04) Neutral Vs. Ground, Inverter Microwave, Digital Communications, Loading Down in DC loads, and more! (Length: 1:14:45) Gas Oven Service Call After a Parts Changing Monkey (Length: 36:04) AFCI and GFCI Circuit Protection Technology (Length: 41:26) Troubleshooting Samsung Refrigerators and more (Length: 1:29:58) 3-way Valves and Dual Evaporator Refrigerators (Length: 1:15:45) Split-Phase Compressors and PTC Start Devices (Length: 1:11:57) Gas Dryer Ignition Systems (Length: 53:50) Refrigerator Sealed System Thermodynamics, Part 1 (Length: 43:07) Refrigerator Sealed System Thermodynamics, Part 2 (Length 1:09:09) To access these webinars and all the other info-goodies here at Appliantology, become a Professional Appliantologist today. If you need cost-effective, time-flexible, state-of-the-art appliance technical training, check out the Master Samurai Tech Academy.
    • Samurai Appliance Repair Man

      [Webinar] Samurai's Sealed System Sleuthing Secrets - 10/30/2017 @7PM ET   10/19/2017

      Having laid some theoretical groundwork in the last webinar, we're going to focus on practical considerations in this one. That means quick n’ dirty techniques for diagnosing sealed system problem using strategically chosen and skillfully interpreted temperature measurements.  Review homework from the first session on 10-2-2017. Home refrigerator practical design and operating rules-of-thumb useful for troubleshooting Practical application exercises Troubleshooting scenario exercise Techniques for making system temperature measurements for determining superheat and subcooling Sealed system diagnosis homework assignment (to be reviewed in the next webinar in this series) If you attended the first webinar in this series, this is your payday! We’re going to apply that keen, penetrating insight you now possess into money- and time-saving shortcuts you can use to diagnose real-world refrigeration systems on service calls. See this calendar event for more details                   
pane77

What can I use an eprom programmer for and can I use it to repair MCU's and CPLD's etc?

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pane77

Hello,

 

I am new to electronics but I do fix appliances to earn $$ on the side which is why I'd like to take this up to the next level. I come across customers who need their PCB or PCBs repaired. I've been successful with some (simple stuff like capacitors, resistors, etc) but I have no way of testing them other than to re install back into appliance (refridge, dryer, washer, etc...). Can I purchase a good eprom programmer that does MCUs and CPLDs, find good ones, upload them into the programmer and fix any future bad one I come across?  Also, how do I test the IC?  Buy an actual IC tester?  If so, which one is relatively cheap ($1k or less) that will do the job? Thanks in advance for everyone's help!!!!!

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Ghost

Let me take a slice at your question.  The full answer is a long one.  I will say that many modern electronic control boards and peripherals certainly contain micro processors and eeproms.  Reading and re-writing the data contents of such devices varies from simple (EEPROM) to almost impossible for programs stored in the main controller-processor.  The two devices require specific hardware and in some cases cannot be unlocked by the consumer.  To go a little further, each honorable appliance has a unique set of programs inside.  You would require a file of programs for each model you encounter AND the ability to re-write the data as necessary- next to impossible unless you are a dedicated board remanufacturer.  This is not a job for a journeyman in electronics.  And, the idividual programmed IC's are not available as spare parts.  Other more common ic's are available from electronics suppliers but these do not contain programmed data.

 

That said, I encourage you to work with the more common problems like loose connections, burned traces, bad soldering and obviously faulty parts on the boards.  That way you can eliminate all but a few really ugly situations that arise from faulty processors and corrupted memory.  Since many brands actually use the same interior controls, keeping good notes on what fails on which board will pay dividends.  Good hunting.

 

Ghost

Edited by Ghost
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parkerspeter

There are some guys on planetlaundry dot com that could do point you in the right direction, as I have seen it discussed over there. I don't know if just anyone can join (you may need a CLA membership). It is something commercial and coin laundries are interested in because small changes in the wash cycle can reduce long term costs. I believe besides a machine that interfaces with the epprom and a computer, you'd need to know the programming language it was done in, and be able to compile it.

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