Your A must be the 2SA – V, A, 25W PNP transistors There are plenty of datasheets floating around when You ask Google. the only other transistors in this amp are 3 c and 2 a per File Type: jpg. To have more than an overview of transistor design and parts File Type: png such as 2SC/A, that are equally good or perhaps better here. at the datasheets for original BC V BC Philips – datasheet pdf. Download, [ A Datasheet PDF Downlaod from ] LOW FREQUENCY AMPLIFIER PNP EPITAXIAL SILICON TRANSISTOR PNP EPITAXIAL A board, A Bit, A filetype:pdf, A Reference, A voltage.

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There is a variable resistor on the daughter board with the IC. I fixed the voltage prob and the rest eventually worked itself out?

If the sense resistor is supposed to be.

Mine didn’t have that problem. All the usual suspects caps and solder joints a few touch-ups are transsistor. In the printer’s old age, something drifted resulting in the 3.

A current sensing resistor BPR58 0.

A Datasheet, Equivalent, Cross Reference Search. Transistor Catalog

The usual function of the resistor is to monitor a particular if and send over-current information to a processor. I plugged the supply into the printer. At this point, I would stop guessing and post the diagram so we can all have a good look.


Still works with no errors and goes to sleep. I have also read about these power supplies with bad caps.

BC556B – PNP Silicon Amplifier Transistor 625mW

If it were me I would just recap the power supply and be done with it I have a HP all in one printer that would keep telling that it was not available Really it plugged in the wall the Ethernet cable hook up I would have reload the software for the printer for it to maybe work This is when I had with this printer and decided to recap the power supply and mother board of the printer before I send it to landfill and be done with it well after recapping both boards I not have any more problem with this printer Now my tablet dose not always show that printer available but is because HP app dose not really want to work with the Lollipop operating system of this tablet but there is a work around that works most of the time save it as a PDF file and then print the page that you want Here is the link to where I had recapped this printer http: The time now is Last edited by golemmaster; at I learned a tiny bit.

I’ll get some pictures up in a little bit. In-circuit it reads 0. If you really have 3.

Find More Posts by Longbow. All times are GMT Is the voltage really 3. I’m pretty sure you can find the schematic for the supply. After much poking around and identifying and looking at some data sheets and tracing some things out and measuring It would only take about 10 minutes or less for the error to come up. While watching datawheet meter, I adjusted the resistor and was able to bring it down to 3. Further troubleshooting at that point would require a schematic.


de.sci.electronics-FAQ V3.07 Stand: 6.7.2017

It’s been running for about two hours. I think you will find that it is similar to a computer power supply. Or am I barking up fransistor wrong tree? I’m working on getting the pics up. Find More Posts by golemmaster.

BCB_PDF Datasheet Download IC-ON-LINE

Usually the 5 volt line is the one that is regulated via opto-coupler. Does anyone have experience with this or similar power supplies? Thanks for listening anyway. What is the resolution of your meter? I’m going to run the machine till it fails and re-read the voltages. Here is a useless update: After it told me the toner was low, it started behaving correctly.

The “universe” won and I was just along for the ride.

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