Posted on: July 9, 2020 Posted by: admin Comments: 0

2N5193 DATASHEET PDF

MICROELECTRONICS. 2N/91/ 2N/94/ COMPLEMENTARY SILICON POWER TRANSISTORS. 2N, 2N, 2N AND 2N ARE . Characteristics of the 2N bipolar transistor. Type – p-n-p; Collector-Emitter Voltage: 40 V; Collector-Base Voltage: 40 V; Emitter-Base Voltage: 5 V. Manufacturer Part No: 2N Order Code: Technical Datasheet: 2N Datasheet. Availability: No Longer Manufactured. See all Technical Docs.

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Hardware shot simply shows the Motorola circled red. The photo titles show the channel allocations to the rails. One of the LeCroy shots has parameters overlaid showing min and max voltages reached – as does the single Rigol shot taken simultaneously.

Transistors

There’s also 2n51933 expanded timebase shot from the LeCroy showing the U op-amp output into the base of Q and its correspondence with movements on the -5V rail, which starts its downward trajectory but is derailed by the positive shift at Q base and doesn’t recover. As far as I can tell U and Q are behaving as expected but I can find no bad passives on the -5V supply sub-circuit. Hopefully this will help with interpretation of my earlier msg. I can post some annotated 2m5193 of the relevant schematic parts if that would help.

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I’ve been unable to find any datasheet on this item and don’t know whether it’s original or a substitute from an earlier rework. I’ll bet the B in B is an 8 and if so is a date code. Use a mica washer when mounting on a metal surface. Reed Dickinson toggle quoted message. On Mon, Oct 8, at And closer inspection shows you’re right that it’s not B My eyes are not what they used to be. In this case the device is connected to a large pad on the Seems that’s the way it should be.

I’ll presume for now the 2N is working OK and move on.

Also can anyone make use of some fast switching diodes and other parts? If you had a spare lying around it would be good to have one available. I’ve started to compare how the -9V and -5V supplies are behaving as the first appears to be working fine and the second is not and they’re not very dissimilar subcircuits and use the same op-amp.

I hope that will shed some more light. Biggest challenge is finding enough time to do the diagnostics. This cannot be undone. The Group moderators are responsible for maintaining their community and can address these issues. Your email is included with the abuse report. Search Only Within Datasheft Topic. The soldering does not look original.

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Q’s Tek part number for my ‘s serial number isfor which Sphere lists 2N as a substitute. Substituting a 2NG for the B hasn’t made any difference.

CENTR 2N Series Datasheets. 2N, 2N, 2N Datasheet.

So the problem seems to lie on the power supply board. At present, I’m just looking for advice on whether this part of the supply is particularly sensitive to the characteristics of Q, datahseet of what the full identifier for the Motorola B might be and where I might find a datasheet, and advice catasheet to whether the 2NG is a suitable replacement and, if not, what to use instead.

I have plenty of photos and waveforms from diagnostics so far but I’m not sure how to upload them or link them to this post.

Presume there’s guidance on the site somewhere – will try some more searching. Will check my box of scraps.

transistor_replacement_guide

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