LaserJet Electricity problem

[typo]

HP M806dn. On a 20 amp branch with UPS,PC,LCD Display. The workstation draws 4.5 amps at idle which is when I would normally be printing. The display draws 1.8 amp and don't know about the UPS but I doubt much when it is not charging. It was tripping the UPS so apc said to plug it into the outlet. I did. It dims the lights the entire time it is printing. I know there is a warmup surge. It is rated at 11 amps. Probably a little less after it gets into a big job and uses power saving. It never trips the breaker. I am very concerned about it dimming the lights which could mean wires in the walls are overheating too. At my total amperage here I should not be having this problem. The lights are on another branch but same phase. So  it is actually drawing more power than the building can handle and it is 400 amp service not nearly overloaded. I absolutely do not understand this if it is only 11 amps. No 12 amp vacuum does this in here. Is this just normal or is this thing broken which is very possible if you read below how I obtained it?

As to why I have such a big printer, I got it from a used copier broker for nothing and i like to go big but perhaps this was a big mistake!?

Thanks

[tp4tissue]

just plug it into the wall with a killowatt and check it..   If it's just surge, then it's no worse than most central AC units..


If the wiring of the house is newer, within 10 years, you should be good up to 20 amp sustained, although if this is a bedroom, the breaker is probably 15amp..  the wire will be good for 20 though.

[typo]

Just the PC and related components are on a 20 amp branch. It continuously dims the lights on the next breaker on the same phase. It tripped a 2400VA UPS. The wiring in here is top notch. I am guessing this printer is bad which is why some company dumped it. I got it and others from a warehouse that sells used office equipment. However the items are much more if they are checked and refurbished. This was not. I have had good luck with this place. Companies sell or send for recycling hundreds of units. They generally refurbish them and again sell hundreds of used units to companies. They are not in the business of selling one unit but have been nice to me in that regard. It has only 900 pages on it. There must be some reason they dumped a 5 grand printer that new and then I purchased it for $300. My old 4L did not do that and drew around the same current. yes, this is much bigger but units have become more efficient. I am guessing they dumped this due to a bad supply. I will use the clamp meter and I can repair it luckily. I am just guessing this is a dud but I will let you know after I use the clamp meter. It really should not draw more than 5 amps once it is warmed up. Actually it could be RFI or harmonics if I am just lucky. It is the same effect as central ac a you said though but that is 50 amps. A device with a 15 amp plug should not do this.

[Tactile]

I'd check the voltage, not the current. Can you connect to one of the dimming lights and compare the "normal" voltage vs when the printer is turned on (when the lights dim)?

[typo]

Yes I will do that in a bit. I have a digital true rms multimeter. I am sure it it is not the home because I can plug in a 12 amp vacuum there and it does not happen. I have a feeling this for some reason is drawing so much amperage the voltage is sagging in the whole building since I just saw a light on another floor dim. I probably have to repair this thing which must be why such a new printer was dumped. No problem to repair it though. If it is sagging on the 400 amp main there is most certainly a problem with it. It is rated at 11 amps but I imagine it could turn on at twice that for a couple seconds. it is drawing like this continuously though. I will measure the voltage sag at the nearest light.

[typo]

Sagging whole building to 68-72VAC. Bad PSU. I will work on it in a few days. Even if i buy a whole PSU board which i doubt it was a very cheap deal.

[typo]

It has a bad fuser. That is fuser, the heating element nof "fuse". Part is $500. In total I will have about 4 hours labor on this job. I figure it is worth it. Even though I don't really need such a printer. So now I know why some big company dumped it. For $800 and 4 hours of my time I got a nearly new $5,00 printer. I could see if they will exchange it for a different used ones but I will probably just run into other problems. This is par for the course when you purchase items in this mannewr. Once they refurbish anything and provide a warranty the price goes up substantially. I often get fixer upper stuff because I am fully capable of repairing electronic and mechanical items. I get real nice stuff for very cheap this way. I have been doing this for years. This warehouse does not normally sell one unit as is but I made friends with a saleswoman years ago there. I get great deals this way even though these office machines are total overkill for me. Why I like this is because I will probably not have to change the toner in my life with machines like this. Which costs more than I am spending on the machine. For instance when one buys a $150 printer they are making their money selling you toner. So it was a good deal. however I should have plugged this into my variac. Since I risked a lot of damage but was lucky i didn't. I figured t was so new nothing was going to be wrong with it. That was wishful thinking since I knew they do not dump new 5 grand printers for no reason. I have done good shopping this way only because I can repair them. I should have the fuser tomorrow I am not sure why I even asked this. Sorry. I knew that was not normal. Lasers do surge big on startup but not more than central AC that was mentioned. Not continuously. As soon as I measured the resistance across it I knew the bad part. I apologize I asked a stupid question for me..

[typo]

Repaired.