error 30.01.18 HP 4100 MFP power supply

[golemmaster]

My HP 4100 MFP (4101mfp multi-function-printer with duplexer) has been giving a 30.01.18 error code. It will function as a printer just fine but I can't use it as a copier/scanner because of the code. 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 3.3 volt output is reading 3.4v and apparently that's just out of spec to cause an error. The error also keeps the whole printer from powering down to low-power stand-by mode. After a power cycle and cool-down period, scanning/copying works for a while but then is halted by the error.
The other outputs are as measured 5.04 volts, 12.0 v, 23.8 v(24). Pretty precise.
The caps seem good - tested out of circuit. A current sensing resistor BPR58 0.02ohms (that I may not be able to test properly because it's too low for my meter) seems to not have resistance at all.
I see refurbished power supplys RH3-2234 available for $200-300. What was fixed?
Or am I barking up the wrong tree?

Does anyone have experience with this or similar power supplies?

I'll get some pictures up in a little bit.

[Longbow]

Re: error 30.01.18 HP 4100 MFP power supply

If the sense resistor is supposed to be .02 ohms, you will read ZERO on an inexpensive meter. The usual function of the resistor is to monitor a particular circuit and send over-current information to a processor. Further troubleshooting at that point would require a schematic.

What is the resolution of your meter? Is the voltage really 3.4 volts, or are you reading to the closest significant value? If you really have 3.4 volts (on an accurate meter) I would say yes, that's a problem.

[golemmaster]

Re: error 30.01.18 HP 4100 MFP power supply

I realized my ESR-micro v3.1 can be used to measure low resistances. In-circuit it reads 0.02 so I guess the resistor is good. I'm going to run the machine till it fails and re-read the voltages. I'm working on getting the pics up.

[golemmaster]

Re: error 30.01.18 HP 4100 MFP power supply

Well. After much poking around and identifying and looking at some data sheets and tracing some things out and measuring ....

All the usual suspects (caps and solder joints (a few touch-ups)) are fine.
12 v has a voltage reg. 5 v has it's own regulator. 3.3 volts is derived by pwm from a K2736 N channel MOS FET driven by a MB3759 Control IC through a A1015 Low-Frequency Amplifier PNP General Purpose Transistor.

In the printer's old age, something drifted resulting in the 3.3 v line going to 3.48 v causing the 30.1.18 error.

There is a variable resistor on the daughter board with the IC. I plugged the supply into the printer. While watching my meter, I adjusted the resistor and was able to bring it down to 3.31v. The other voltages are unchanged.

I've put the printer back together and turned it on. It would only take about 10 minutes or less for the error to come up. It's been running for about two hours. It went to sleep which is something the error state did not allow. I've scanned and copied with it. No error so far.

<carefully, quietly, patting myself on the back>

I hope this forum and my story is found and helps other DIYers and the curious fix their HP 4100 4101 MFP printers with the 30.1.18 error.

I have also read about these power supplies with bad caps. Mine didn't have that problem.

[golemmaster]

Re: error 30.01.18 HP 4100 MFP power supply

Well. It took a couple days but the error returned. Dang it.
I can't work on it right now but I will get back to it sometime later.

Any ideas?

[Longbow]

Re: error 30.01.18 HP 4100 MFP power supply

I'm pretty sure you can find the schematic for the supply. I think you will find that it is similar to a computer power supply. Usually the 5 volt line is the one that is regulated via opto-coupler. 3.3 volt is often generated by a magnetic amplifier circuit. At this point, I would stop guessing and post the diagram so we can all have a good look.

[golemmaster]

Re: error 30.01.18 HP 4100 MFP power supply

Here is a useless update:

After it told me the toner was low, it started behaving correctly. I replaced the toner cartridge with a genuine HP cartridge. Still works with no errors and goes to sleep. All seems well.

So maybe the voltage was the problem and the off-brand low toner made it worse...... ???
I fixed the voltage prob and the rest eventually worked itself out?
I don't know anything. I learned a tiny bit. The "universe" won and I was just along for the ride.

Thanks for listening anyway.

[sam_sam_sam]

Re: error 30.01.18 HP 4100 MFP power supply

If it were me I would just recap the power supply and be done with it I have a HP 4500 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
https://www.badcaps.net/forum/showthread.php?t=32380