Comments on: Electronics Repair Questions/Answers & Testimonials- Part 39

By: Jestine Yong

Jestine Yong — Mon, 02 Dec 2013 07:13:52 +0000

In reply to gilbert.

HI Gilbert,

I'm fine but sorry I do not have those eeprom data.

Jestine

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By: gilbert

gilbert — Sun, 01 Dec 2013 22:42:08 +0000

hi its gilbert again after a very long time how are you keeping can you please help me with eeprom data for sinotec lcd mp-32hu32 or rc-n38

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By: Jestine Yong

Jestine Yong — Tue, 11 Dec 2012 23:13:39 +0000

In reply to Zibbo.

HI Zibbo,

I have no encountered such situation before. if the original part number is darlington then you should use back darlington. In your case if you have no other choice then you can try replace and retest.

Jestine

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By: Zibbo

Zibbo — Tue, 11 Dec 2012 01:45:27 +0000

Hi Jestine
I am repairing a Sanyo TV Chassis MC41B, it has a shorted transistor TKD2092 and according to the schematic it is a Darlington transistor. I cannot find the part in Zimbabwe where I am so I searched for the datasheet on the internet and I could not find it. All i am getting is TKD2092 NPN Transistor. Can I use this ordinary transistor to replace the Darlington?
Is it normal to have the same part number for different parts? Thank you very much for your time and your articles
I

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By: Jestine Yong

Jestine Yong — Mon, 10 Dec 2012 00:00:12 +0000

In reply to Imran.

Hi Imran,

Sometimes the burnt component can be a varistor or thermister. A thermister is connected in series with the live line and the varistor is connected in between live to ground or neutral to ground or live and neutral. You need to find out what type of component before you put in the component to avoid problem.

Jestine

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By: Imran

Imran — Sat, 08 Dec 2012 11:07:20 +0000

Hi Jestine thanks for your info I am a novice in electronics the problem is there is no number on the blown component it looks like varistor or thermistor http://img708.imageshack.us/img708/4097/1354927130032.jpg
the green component beside heat sink is the one blown , in one of your post hp laserjet you replaced a varistor but you said we can solder a wire but it will not protect from future surge that's what I did I removed this component and soldered a wire and switched on the main fuse of our house went off . I then replaced it with 240 v varistor and switched on this time fuse didn't blow but PSU. Didn't get on plz help me as I have been following you a very long time you are genius in this it will be a cup of tea but for me a ocean

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By: Jestine Yong

Jestine Yong — Mon, 03 Dec 2012 23:08:19 +0000

In reply to Imran.

HI Imran,

First you need to know what type of component that already burnt. If it is a varistor (you can see from any varistor circuit how it is connected) and you place in a thermistor definitely the main fuse will blow.

Jestine

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By: Imran

Imran — Mon, 03 Dec 2012 20:25:29 +0000

Hi Justine this Imran hope you remember me I posted one question regarding Xbox psu burnt component and was confused about thermistor and varistor well I was not able to find whether it was in series or parallel so I replaced the burnt item with 250 v varistor and switched on but it didn't work it didn't turn on so I removed it and replaced with piece off wire and switched and my inverter backup of my home fuse blown may be the wire was not good idea which I thought will work my question is does I have to replace with thermistot or a different varistor will work please help

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