Alimash
Member
Last Activity: 03-03-2025, 05:31 AM
Joined: 07-22-2019
Location: Beirut
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yes, but it start buzzing when connecting any non resistive load like my hot air station for example which is rated about 400 watts i think.... -
I agree, what is the problem?
The mosfets, the driver??
I'm also considering this to be a badcaps case?...Leave a comment:
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it does charge a lead acid battery but it also convert DC to AC...Leave a comment:
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Kind of...Leave a comment:
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APS output
Hi
The output of the attached automatic power supply is not normal
I know it is not a pure sine wave inverter but:
1-Shouldn't the output be square wave; it is really distorted.
2-if there is a problem, how I can fix it
I have a background in electronics and I am using hantek pc oscilloscope for measuring. -
Re: Component without datasheet IC's labeled "IN1S313I" and"IN1S424I"
Thank lotas,this is very helpful since the Weltrend ic's can be purchased while Infsitronix company don't have distributors (that i know of) and didn't reply to my email.
What about the IN1S424I?
I hope these pictures help...Leave a comment:
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Re: Component without datasheet IC's labeled "IN1S313I" and"IN1S424I"
??Leave a comment:
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Re: WT7527 supervisor shutting down a good PSU
I have a similar issue, i am thinking of changing the WT7527.Leave a comment:
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Re: 12V 10A CCTV camera system power supply pulsating
Just a thought, a similar issue happened to me, and i solved it by simply resoldering the whole board, it turns out some joints has moisture.
It took me a lot of time to figure it out.Leave a comment:
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Component without datasheet IC's labeled "IN1S313I" and"IN1S424I"
Hello
I am troubleshooting a couple of coolmaster ATX power supplies.
I suspected that the faulty components are the sps supervisor IC's labeled "IN1S313I" and"IN1S424I".
I couldn't find any information about them online exept for their name, role and the manufacturer witch is "infsitronix".
No datasheet, no pinout, i even tried to email infsitronix but no reply so far.
I can't find a supplier to buy it either.
Any help of how to test it and where to buy/order it is appreciated.
Regards. -
Re: campomatic tv secret service menu
Ok guys
I will try thatLeave a comment:
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Re: campomatic tv secret service menu
Thanks dick
but i have been told by an [B]expert [/B]that the on screen menu is not the solution
i need to press a combination of buttons to enter another menu.
this link show what i mean
[URL="https://www.askvg.com/secret-service-codes-for-sony-and-lg-tv/"]https://www.askvg.com/secret-service-codes-for-sony-and-lg-tv/[/URL]Re: campomatic tv secret service menu
Thanks dick
but i have been told by an [B]expert [/B]that the on screen menu is not the solution...Leave a comment:
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campomatic tv secret service menu
Hi guys
i got a campomatic led tv labeled "32s1j" which have a back light problem: no back light.
i opened it and did some voltage test ,the led driver deliver only 26 v which means that one led or more is fried.
There is two led strips and each one contain six leds.
i changed the fried led and reconnect the two strips and the problem were fixed, the led driver now deliver 70 volt when i press the power button and 26 v in standby button.
i turn the tv on for three hours, after the led strip fried again!!
My assumption is that the current delivered... -
Re: operational amplifier used in a ups(LM324)
I figured it out
It is used to detect voltage
Thanks a lotLeave a comment:
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operational amplifier used in a ups(LM324)
hello guys
i repair a ups recently and i was surprised they are using an op amp[B](LM324)[/B] and i wasn't quite sure why they are using it so i tracked the connections using my microscope.
I came out with a schematic which you will find in the attachments.
MY question is what might be the function of the op amp here ?
Also kindly post a quick analysis for the circuit.
Notes:
1-pin 4 and 11 are the power supply pins.
2-If you find something illogical, tell me and i will review the pcb to correct the error in my schematic.hello guys
i repair a...Last edited by Alimash; 08-20-2019, 11:59 PM. -
Re: replacement for a transformer found in an old camera
Ok thanks
I will look into that...Leave a comment:
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Re: replacement for a transformer found in an old camera
I already tried that :-)...Leave a comment:
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replacement for a transformer found in an old camera
Hello friends
I am trying to fix my old camera [B]"samsung s860"[/B] after it took a dump in water, the PCB also took a shock
i successfully clean it and turn it back on but the shock cause a small transformer (i think) next to the flash capacitor to pop out of the board which broke one of the winding.
my problem is i couldn't find a replacement on the net whatever i searched for,the only code written is "91K" and some unread code in the bottomn of the component.
I need a replacement for this component for the flash to work.
ThanksHello friends... -
Re: New Members - please post your introductions here
Hi
Alimash here
I am an electronics technician with a little bit of experience (a few months).
I opened a repair shop recently and counting on you guys to help me😉
Though i graduated with a good grade i think the practical experience is the most important.
Programing microcontroller is nice but the market in my region is all about hardware maintenance😑
I hope in the future i can be a giver more than a taker
Ps:excuse the grammar mistakes😁Leave a comment:
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