Thursday, July 4, 2024

LG 49-inch LED television model 49LH549V has no picture but sound was okay.

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

The client told me he suspected backlight failure, so I proceeded to the site armed with all equipment for any scenario.

Saturday, May 4, 2024

woofer repair course by Humphrey kimathi


I get lots of inquiries from my followers requesting a book on woofer repairs, so this book is yours for the asking.

To be an expert on any equipment repair, the basic thing is to understand how the equipment works.

This is exactly what this book is here to do.

For more details on getting this book on your workbench follow me here

Stay safe

Monday, April 15, 2024

Sony Home theater model HBD-DZ650 changing function automatically now repaired.

 I received the above home theater in my shop for repair, complaint from the customer was changing function automatically.

Since I was busy I requested him to leave his contact so that I can let him know when ready. Later I opened the machine.

Sunday, February 4, 2024

Tuesday, November 14, 2023

Why electronic protector talking long to activate protection mode.


The problem of this AC line surge protector was not starting to  give protected AC before 6 minute, something must be wrong  inside the machine since there was no diagram for this circuit  as general services first I re-solder all the joints then the most  problematics part are e -capacitors I had three on the board.

10 microfarad @50 volts

220 microfarad@25 volts

22 microfarad @ 16 volts

The value of 220 microfarad cap was changed to 200 micro and  ESR 148 ohm that was not good two others were not bad  enough by replacing the cap machine start to give voltages  after 2 minute

Article brought to you by Mr.Beh. based in Tehran City-Iran.OP AMP DBL 324

Wednesday, September 20, 2023

Ramtons Microwave oven model RM/320 with “no heating symptoms” now repaired,

I received a microwave from a customer who wanted it checked by a technician,

The complaints were the microwave was working well in terms of setting time and everything but after going through the process, It could not heat the food.

This problem from my experience it is used caused by failure in one or more components of the high voltage circuit.

These incudes, magnetron, high voltage capacitor, high voltage diode, High voltage fuse or high voltage transformer.

Friday, July 7, 2023

Test and Tag Training: Ensuring Electrical Safety in New Zealand

Electrical safety is of paramount importance in both workplaces and residential settings. Faulty electrical appliances and equipment can pose serious risks, including electric shocks, fires, and even fatalities. To mitigate these hazards, it is crucial to have a thorough understanding of test and tag procedures. Test and tag training plays a crucial role in equipping individuals with the necessary knowledge and skills to carry out these procedures effectively, ensuring electrical safety compliance and safeguarding lives and property.