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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I’ve scanned and copied with it. I replaced the toner cartridge with a genuine HP cartridge. All the usual suspects caps and solder joints a few touch-ups are fine.


Is the voltage really 3. Service manuals say to replace the scanner board but I read in a couple other forums that it is actually the power supply that causes the problem. The “universe” won and I was just along for the ride. All times are GMT Find More Posts by Longbow. In the printer’s old age, something drifted resulting in the 3. It would only take about 10 minutes or less for the error to come up.

onics-FAQ V Stand:

After much poking around and identifying and looking at some data sheets and tracing some things out and measuring Last edited by golemmaster; at The caps seem good – tested out of circuit.


So maybe the voltage was the problem and the off-brand low toner made it worse The time now is Usually the 5 volt line is the one that is regulated via opto-coupler. The error also keeps the whole printer from powering down to low-power stand-by mode.

I’m pretty sure you can find the schematic for the supply. While watching my meter, I adjusted the resistor and was able to bring it down to 3. I learned a tiny bit.

I can’t work on it right now but I will get back to it sometime later. In-circuit it reads 0. Here is a useless update: There is a variable resistor on the daughter board with the IC. It went to sleep which is something the error state did not allow. I don’t know anything.

I fixed the voltage prob and the rest eventually worked itself out? Still works with no errors and goes to sleep. I have also read about these power supplies with bad caps. I plugged the supply into the printer.

I’m going to run the machine till it fails and re-read the voltages. I’ll get some pictures up in a little bit.

If the sense resistor is supposed to be. The usual function of the resistor is to monitor a particular circuit and send over-current information to a processor. Find More Posts by golemmaster. 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: Mine didn’t have that problem.


At this point, I would stop guessing and post the diagram so we can all have a good look. Does anyone have experience with this or similar power supplies?

error HP MFP power supply – Badcaps Forums

Or am I barking up the wrong tree? The other outputs are as measured 5. Further troubleshooting a105 that point would require a schematic. I realized my ESR-micro v3. A current sensing resistor BPR58 0. The other voltages are unchanged. I’m working on getting the pics up. Thanks for listening anyway.