Tuesday, December 7, 2021

43 inch Hisense television hit by power surge now repaired

I was sitting in my shop working when I heard a loud bang and then power in my shop went off.

I went outside and noted some people near my shop pointing where the bang came from, Power transformer has blown.

Being a weekend the power was not restored until Monday, coming back to my shop I passed by a shop nearby and the shopkeeper told me the power was restored back but most of his items were dead.

Among them was power supply for his kerosene pump, I went to my shop and did some testing, luckily only my laptop was plugged to power outlet by the time of power purge.

I checked it out and noted it was dead as dodo, that a story for another day.

A few minutes later I received a phone call from my landlord, complaints was that his TV has not worked since the day of the power surge.

Being month end and I had to pay bills including rent, I decided to treat this as urgent, I went to his house, picked up the television and brought it to the workshop for repairs.

Upon opening the television I went straight to the safety components starting with the main fuse which as you can below it was open.

Monday, November 8, 2021

Clubox woofer producing Humming Noise now repaired!

  I received this woofer from a customer who wanted it checked by a technician.

He hinted that the woofer was from another technician who was not able to repair it.

Items from other technician are tricky to repair especially if the tech had limited knowledge on how circuit works, they ends up making so much experiments and guess works and therefore chances of repair is quite low.

Nonetheless I decided to have a try and see if I can help this customer who seemed desperate to see his machine back to normal status.

After opening the set I found the main filter capacitor rated 470uF/25V has its top part swollen.

From the symptoms at hand the failure of this capacitor fits so well and I was very confident this was one of the easy fix.

I pulled a replacement capacitor from my capacitor kit quickly and decided to do test and the machine came up beautifully.

Tuesday, September 14, 2021

TLS woofer came in with low audio output now repaired

 


I received this woofer from a client who wanted it checked by a technician.

According to her the woofer no base but the rest is working well.

I did the test to confirm what she said and noted the woofer symptoms were different from what she gave. The actual symptom was low audio output.

Wednesday, August 25, 2021

49 inch LG led television model (49UJ634V) with backlight problem now repaired.

 I received a whatsups message from a neighbor with the following image taken from his television screen and wanted me to advice him about the issue.

As you can see from the image the top part is dark, from the screen shot I suspected backlight failure but was to confirm since from experience if one backlight fails for branded television like LG I expect the protection circuit to kick in and shut down the television.

Thursday, August 12, 2021

49 inch KONKA Led television came in with power related problem now repaired.

I received a phone call from a client who wanted his television checked by a technician.

The symptoms were, Television is powering on then shutting down after 20 to 30 minutes.

When the television shut down, the audio remains but no picture.

Since I could not figure out the real cause of this symptom from the description given on phone, I requested him to bring the television to the shop for further testing.

Within one hour he was at my shop credits to Google map which does great job in directing customers to my shop.

Once on my work bench I decided not to test what the customer said since I figured out taking a whole 20 minutes waiting for the symptoms to present is waste of time.

I opened the television and after removing the cover my eyes caught the attention of one capacitor which had its top silver part slightly swollen as you can see below.

 

 

Monday, July 26, 2021

Understanding home theater Channels

Most people have problem in understanding home theater channels, in this article i am going to shed some light on the same.

Sometimes we see home theaters written 5.1, 7.1, 5.1.2 and so on.

What does this mean? 

This refers to channels; you may think of channels as speakers.

           Old stereo system is now referred to as 2.0(2 channels or 2 speakers)

           2.1 has 2 speakers and 1 subwoofer

           7.1 has 7 speakers and 1 subwoofer

           5.1.2 has 5 speakers,1 subwoofer and 2 dolby atmos speakers

Dolby Atmos speakers- where we place 2 or more speakers on the ceiling, now we are talking of 3D sound, where any sound can hover at any point in space.

Example: 7.2.1 has 3 speakers in front, 2 at the sides, 2 at the rear of the room and 2 in the ceiling and 1 subwoofer at the back (can be placed anywhere).


Learn how to repair home theaters all model here.


For those visiting from Kenya our office direction is here



Wednesday, July 14, 2021

32 inch SONY LED television model 32R420B dead, red lights blinks 6 times now repaired

 I received a phone call from a friend who wanted his television checked by a technician; I scheduled him the appointment and he logged in our office the following day.

First I wanted to confirm the symptoms he has given me before opening the television in his presence.

I noted the screen was trying to display but shutdown immediately.

After 30 seconds I noted the red light will start blinking, I decided to count the number of blinks and noted they were 6 blinks, 3 second break, and then start again.