Saturday, May 7, 2016

Understanding markings on capacitor body

For electrolytic capacitors the marking are easy to understand and many technician have no problem here.


The challenge is with non-polar capacitor, let have a look at some of the marking on non-polar capacitors.
Let have look at a few examples:

Saturday, April 23, 2016

21 inch LG Ultra Slim audio okay, no picture repaired.

I got a phone call from a client who wanted her Television checked by a technician, Complain was no picture but audio was present.

I passed by and since she was out, I was assisted by her daughter who was on vacation during the long holidays here in Kenya.

As usual I applied power to confirm the symptom and the result were the same. I opened the TV and took with me the motherboard with her consent.

Thursday, April 14, 2016

Question and answer part3

Richard Schmauch from United States

Hello Humphrey, I recently purchased the e-book CRT TV Repair Course and it definitely is a very solid read with loads of information, but I'm still having an issue with my TV which I'm wondering if you can help me out with.

I have a Magnavox 20" CRT TV which seems to work fine, but the volume takes forever to be able to hear the sound. It takes about 3 to 5 minutes to slowly hear the TV. If the TV's only off a bit, the sound will resume just fine, but if the TV's off for a while, you have to wait all over again for the sound to once again resume. It's definitely a nuisance.

What could be causing this, what could be done about this, and how much would it cost to get fixed. Again, it's a Magnavox 20" CRT TV with a model number of 20MT1331/17.

Sincerely,
Richard

Wednesday, April 6, 2016

Orion HT800HC Dead as a Dodo

Hello Humphrey!
Did you write the article on the Orion HT800HC? I have exactly the same problem with an Orion HT800HC and being a hobby mend it person, I opened the unit to have a look.

The Problem: We have a lot of lightning storms here in central Hungary and subsequent short power cuts (anything between 5 minutes and three days). I can well imagine that when the power came back on after a recent storm, there was a power surge which went into the DVD player which was still switched on. Consequently my unit is now dead as a dodo!

Saturday, April 2, 2016

How I solved ‘No disc” symptoms on JVC DVD player

No disc problems in all types of DVD is a common phenomenon, before a DVD start reading the disc, there are several test it does just like the booting of the computer (CPu) called start up process.

If by any chance any of the stage is not working the DVD will display an error on the screen, most of the time it is disc error, no disc etc.

Among the components which are most suspected is the LENS, but from my experience this is one of the most stable components with a relatively very low failure rate.

Saturday, March 26, 2016

How to write a blog from the scratch using blogger from google

First welcome to the world of blogging, in this lesson I will show you how to make your own blog in a short period almost effortlessly.

Worry not this course does not require any special knowledge in programming language/html codes etc.
To begin with you will need to open an account (email) with Google which is absolutely free.

Tuesday, March 15, 2016

Question and answer part2

Peter B. Mutale from Zambia
Dear Humphrey,
Thank you for your educative ebooks that I have been reading on repair of CRT televisions. Please I would like you to help me on:

1.How I can know the presence of base voltage on SOT base lead. Your book 'CRT Television Repair Course' states that this voltage could be about -1.38v. The question is - Is this DC or AC and which digital meter range can I use to measure this negative voltage. I have been trying to determine it with my digital meter but have failed to come up with the answer.

Saturday, March 5, 2016

CHINA TV WITH VERTICAL LINE REPAIRED

A friend of mine called me to check out his TV which had a problem,As usual I took with me minimum test equipment, digital meter, screwdriver, iron gun and some soldering wire.

Upon reaching his place he was out of the house but the children were around,After introducing to them my mission, they pointed to me the Television.

I wanted to know a brief history of the TV and one of them who was there as the TV went down told me that she was just watching a program and saw a line on the screen and that was the end of the TV program.

Friday, February 26, 2016

SONY TV DEAD repaired

A friend of mine called me to go and check on his TV, Due to my busy schedule I was not able to go immediately and therefore he decided to ask for assistance from a different source (technician).

According to him the tech was coming to check on his fridge, he also mentioned to him about his TV and he said he also repair TVs and hence took on the new assignment.

Friday, February 19, 2016

Question and answer

Sizwe Sizwe from South Africa writes.
Hi Humphrey.
As a new student in this course please be patient as most of my questions will be on things that seem simple to someone else but not so to me.

I have these questions:
1.The difference between drive transistor and horizontal output transistor

When explaining something to my student I believe a photo speaks a thousand words. On the picture below we have the Drive transistor and horizontal output transistor (H.O.T).

Friday, February 12, 2016

Customer not happy with me

Gud day sir Humphrey, You have still not given me any answer on the question I asked last time. And am no longer enjoying your post cos I've not been getting the real thing from it what I need to know more about are all this hard faults in LG, Sharp, Sony, Toshiba & Panasonic thanks

Which answer? I remember giving you enough info on what you asked, checking from my communication to you I have written over 100 emails to you only.

Saturday, February 6, 2016

LG 14 inch CRT television model CF-14D10K sound okay no picture.

A friend of mine called me to pass by his place to check on his television, the complain was no picture but audio is okay.

I passed by his place and he was out of the house and I was attended by the wife. There was no power in the area and after asking her a few question about the nature of the problem she confirmed what the husband said.

I never carried with me any equipment because I was not intending to do the repair on site.So I took the television with me back to my workshop, I applied the power and to my surprise the screen was full.