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I need a diagram for Samsung Plasma PS43D450 with components please.

Looking for transistors.

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Tom Chichester

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Contact Samsung directly to request the schematic diagram.

Posted on May 01, 2017

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Where can I find a transistor for a xantrex inverter?


Which model inverter?

I assume you are looking at the chopping transistor. How did you come to that conclusion?

A transistor can be purchased at many locations, including Xantrex, but most go to "You do it" electronics stores? It should be a standard MOSFET transistor, available at many locations. There is a number stamped on the exposed side of the transistor.

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Where can I get the scematic for the Veco 21 STC voltage control circuit board?


try mailing the manufacturer

hot transistors are usually shorted out, or driving a short!!

a multimeter across the 3 transistor legs (TO-3 transistors have 2 legs & the case which is the 3rd leg) will reveal if they're dead (remove the transistors first as the circuit may give a false reading) - if you get a zero ohms reading between any of the legs it's dead - don't forget to check the smaller driver transistors too,, as a dead main transistor will kill its smaller driver transistor

speakers are marked,, usually 4 ohms or 8, though sometimes 16 ohms - use a multimeter to ensure you have something very close to these values according to the label on the speaker box & measure from the wires at the point where they connect to the amp

power the unit without any speakers or speaker wires connected,, if the transistors still get hot, you're very likely looking at bad transistors

Feb 21, 2015 | Audio Players & Recorders

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I would like to replace the stock 2SC1969 bipolar transistor with a ERF2030 mosfet transistor in a Galaxy 93T.Can anyone tell me if any caps need to be removed on the amp board since C203 and L33 are not...


The radio you listed "Galaxy DX-93T Base CB Radio" utilizes a 2SC2290 final transistor. This is not a T220 2SC1969 and you cannot install an ERF2030. This is a round and white looking transistor. Replace it with only the same transistor.

Mar 11, 2011 | Galaxy Radios DX-93T Base CB Radio

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I have a sony STR-de135 receiver whlie looking for one problem created another.While the receiver was unpluged I touched and output transistor MN2488 and it sparked now the left channel sounds distorted so...


The capicitors in the unit are charged. Replacing the output transistor(s) is not a task for a novist. Capicitors, resistors, driver transistors and sometime preamp chips can also be bad as well. If all the bad components are not replaced the parts you replace could blow out again.

Jun 19, 2010 | Sony STR-DE135 Receiver

1 Answer

T1500-1bd burnt mosfet


First of all is the mosfet your talking about in the output section or in the power supply section? Most car amps use mosfets in the power supply section, some use them in the output section. To test the transistors in your amp, take a digital volt meter and set it to diode check. Then take the leads and put them accross the first and third legs of the transistors. Usally the red test lead on the first leg and black test lead on the third leg of transistor. If you get a reading of 000 then transistor is shorted. If you get a reading below 600 then transistor is on it's way out if not allready or it's next to a shorted transistor that is it's complimentry output transistor. comonly you will have 2 transistors working together, one NPN and one PNP per a channel, or 4 of them in a bridged type output circuit depending on the watts and how man channels your amp has. I was just looking at the specs of this amp and it's got me confused. It says it's a 2 channel but looking at all the info on different pages it says at 4ohm:200wattsx4 and at 2ohms:300wattsx4 and 1 channel mono 600watts into 4ohms. weird for a 2 channel. anyway that is how you test your transistors. Same way for the power supply section but, you will come accross a couple or more switching diodes that look like transistors and you will get a 000 reading when you test those like I specified. They rarely go out and most of the time there is only 2 of them. They will have a diagram like a diode on the front showing you which way the power flows. Let me know what you find out. Your amp should have went to protect mode if you smoked a mosfet.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/mark_b53a7494531bf96d

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1 Answer

Parts replacements


This is straight from the 1989 Japanese Transistor Substitution Manual.......

2SA 1011--------use 2SB 1085 A, made by Rohm

2SC2344---------use 2SD 1562A, made by Rohm

Good luck...Rob

Jan 31, 2008 | Audio Players & Recorders

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