HOW TO TROUBLESHOOT AND REPAIR HV PROTECTOR/ TV GUARD

HV protector sometime called TV guard it is an electronic device used to protect home entertainment against voltage surges or over voltage, if voltage become to high it disconnect a load from electrical power and reconnect it after it has been decreased to acceptable range, in this video you will see how to test its main components, like main fuse, precision voltage comparator, relay switching transistor, relay, diodes, resistors, capacitors, also understanding its working principle and bases,
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[@ChrisCresta-hs8cz]

Hello great video exactly what i was looking for and well explained. I have one that has stopped working, red light remains on and never goes to green. There are some resistors under the big capacitor but they are all burned and I do not know the values. Measuring with a meter ready various values from 409 Ohm to 470 Ohms but the first colour looks to be brown. Please could you tell me what value these should be?
On an unrelated question. Ever since learning electronics I was told there should be a transformer to drop the voltage from 220v AC to the lower voltage. After passing the 4 diode brigde the 5.24V comes from 78L05 but where does the 12/24V DC to switch the relay come from?

[@felixtechnoaid2044]

in my next video you will also see how to turn HV guard into fridge guard, do you have an idea about it? let me know, leave a comment

[@felixtechnoaid2044]

A question of the day⚡do we have to use HV protector to protect a washing machine??
who watch this video also need to watch this👇
ua-cam.com/video/Q2oyEy30uxI/v-deo.html

[@AbdulSamad-cy2uo]

it is already operating with uncorrect 255 volts, there is no problem turning off itself , just showing uncorrect volts on the display.

[@felixtechnoaid2044]

check supply voltage with digital multimeter, if it measures 255volts or displaying voltage lower than 255volts replace that protector,

[@AbdulSamad-cy2uo]

dear friend, i have also this type fridge guard with digital volt meter, i am using this guard approximately one year, before it shows me correct 220 volts in the meter, but now its showing 255 volts since 2 month.

[@felixtechnoaid2044]

it switch off the power?

[@CorneredCat0]

We ni mtz bro?

[@felixtechnoaid2044]

try English my friend so that we can communicate
Thank you

[@josephkarish4556]

What can I do if the power supply to the relay reads 5.67V?

[@felixtechnoaid2044]

supply voltage for relay must be 24Vif voltage is less than this check voltage dropping resistor in serie with capacitor

[@felixtechnoaid2044]

please subscribe , Like and share

[@landry2313]

Any help

[@angolkenneth6520]

Main switches itself off randomly I don’t know why but it can be working then after some time in your switches itself off and it goes on the yellow late then after like 20 seconds again it switches on but I don’t know the cause of that

[@felixtechnoaid2044]

the main cause is voltage fluctuation , unstable electrical mains.

[@felixtechnoaid2044]

please subscribe to day, be aluays with us if you need to increase your technical knowledge through our videos, Like and share
Thanks.

[@tyblue5715]

I have a similar problem but mine when the relay switches it to green it immediately switches back to yellow

[@felixtechnoaid2044]

Check outlet voltage if is adequate

[@angolkenneth6520]

How does the regulator work

[@felixtechnoaid2044]

DC voltage regulator?

[@juliusangel2774]

Can tv , laptop , dstv be used on it at the same time ?

[@felixtechnoaid2044]

it depends to it's amperage , you can use 7 amps HV protector.

[@juliusangel2774]

@@felixtechnoaid2044 which one is the 7 amps? I have like the one you have on this video it is 13 amps will that carry those things at the same time that I just mentioned ?

[@felixtechnoaid2044]

@@juliusangel2774 yes of cause they will work.

[@landry2313]

We want to learn

[@felixtechnoaid2044]

we shall teach you no problem