Thursday, October 15, 2020

21 Inch JCV Television came in dead NOW repaired!

I received a phone call from my neighbor who wanted his television checked by a technician, I passed by his place and picked the television.

 I went back to the shop and after applying power via my series current limiter bulb I noted the Television has no sigh of life.

 But listening carefully I could hear some chi-chi sound coming from I can’t tell exactly where. I opened the television and tested across the man capacitor and I get around 300 vdc which is not bad for those using 240 Vac.

 I tested across all the secondary outputs and I got less near zero volts on all outlets, I decided to switch the power off and do some resistance testing across all the secondary outputs, this was done across the secondary diodes and I noted one line was dead short.

 Upon close investigation I noted it was the B+ line and therefore decided to check the health of the HOT transistor and to my surprise it was dead short.

Monday, September 14, 2020

How a micro switch works

A micro switch, is an electric switch that is activated by very little physical force, of late they have become very popular due to their low cost and high durability.Commonly used in microwaves, rich cookers, blenders etc

Friday, September 11, 2020

Foundations of Electricity & Electronics Course By Humphrey Kimathi

Foundations of Electricity & Electronics Course.

Course code: 14RESFEE 

This course is not about Radio Communications.

This course is intended for those starting out in the world of electricity and electronics.

The course starts at the beginning and takes you through to a solid knowledge of electrical principles. You will then explore the important beginnings of electronics.

This is an assignment based correspondence course via email.

The assignments are in MS Word format.

In total there are 11 assignments. 

You read the course material and complete your assignment then return it via email to your facilitator/trainer. The facilitator will then review your assignment and give you feedback on your work. You can progress at any pace, fast or slow. Your assignment will then be returned to you via email with your next assignment.

 Just some of the topics covered in this source include: -

Atoms – charge -Ohm’s law- basic circuits – series & parallel circuits – inductance – capacitance – reactance - cells and batteries – alternating current - measuring devices - transformers – impedance – RLC circuits – resonance – power supplies -mains power – semiconductor theory – diodes – LED – zener- transistors – and much more.

Wednesday, September 2, 2020

Foundations Electricity & Electronics

The book is written by Humphrey Kimathi and Ron Bertrand.

Humphrey Kimathi has over 20 years’ experience in repair and service of home electrical appliances which includes, SMPS, LCD/LED Televisions, Home theaters, CRTs, Microwaves, woofers etc. and Author of over 7 books in electronics repairs.

Ron Bertrand has over 40 years’ experience teaching in electronics and radio communication.

Founder, radio and electronics school(RES) in Australia, a volunteer organization which has worked together with thousands of students of all ages to help them achieve their goals, Which I pride myself for being a former student.

Radio and electronics school (RES) is an online school and can be found at here.


This book is for beginner studies in Electricity and Electronics. it a detailed eBook for those interested in scaling career in electronics and a reference book for those already in the field.

The book takes you through all topics in electronics from beginners to advanced level in classroom setup environment.

The book has numerous photos and images to make the user get the concept fast, highly recommended for new student in electronics, hobbyist, to the advanced users.

Now available at Amazon here or click on the book cover


Now offering training on Foundations of electricity and electronics beginners course in partnership with radio and electronics school of Australia, more details here.

Wednesday, August 19, 2020

Sony home theater push power protection error now repaired. (Model DAV-DZ270)

A client home theater displayed “push power protection” error on its display board and figured out that this could be a small issue and can be sorted out by himself.

So he decided to ask google and when he did the search for the error google referred him here.

After going through the article he noted the writer of the article is from Kenya and being also a Kenyan decided to call me to help him out on this funny error.

When I received his call he told me that he is from Nairobi and wanted to know which part of Nairobi I come from so that we can link up.

I told him our shop is in Utawala and to his surprise he was also from Utawala, a walking distance from my shop.

I booked him the appointment and came the following Saturday after work since he works around the area (Jomo Kenyatta international Airport).

After receiving him in my shop we did a little introduction and work begins.

First was to confirm what the customer said and therefore I plugged the machine to the power socket and pressed power on button and this is what I saw.

Monday, July 27, 2020

Learn how to repair lcd led tcon problems and panel problems ebook download

If you are in the repair service industry for lcd or led television you may have realized that screen issues are almost always caused by t-con or panel problems are quite common.

Worry not my friend, for the first time we have the solution for these problems in form of ebook written from the workbench point of view.

Not only that after you buy the ebook you will get these four ebooks free!
1.Collection of LG LCD/LED/OLED television interconnect diagram.
2.LG T-con board troubleshooting and training
3.LG T-con board testing points and voltages
4.Collection of T-con board repairing information

Get your copies today by clicking the book cover or here

Friday, July 17, 2020

43 Inch Hotpoint LED television model L43T100NA came in dead now repaired.

I got a phone call from a client who wanted his television checked by a technician, it was a referral case from another client I had repaired his gadget previously.

He directed me to his place within the neighborhood and was able to trace his place. After sanitizing my hands, I was ushered in and shown the television.

I asked for brief history and was told they shut it down previous evening and in the morning the television never wake up.

I applied the power to confirm what they said and indeed there was no sign of life even the standby light was absent.

With that I took the television to my workshop and after opening it I went straight to check the state of the safety components beginning with the main fuse and to my surprise noted it has a thick jumper wire across it and this lead me to conclude the television had a previous repair.