Question about HP LaserJet 8150 Printer

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Hp Laserjet 8150 LVPS replacement

Hello,  I have a HP laserjet 8150 and i need to replace the LVPS (low volatge power supply) unit. I have the part onb order but i am concerned with the difficulty of the replacment and the closest rep in my area is 2 hrs away. Do know if this is a difficult swap? Know of anywhere i can get the instructions on how to comp[lete the replacement?

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Re: Hp Laserjet 8150 LVPS replacement

It is located in the back of the printer on the bottom. Remove the back cover. With the power off, remove the formatter board by loosening the two big screws and pulling out. Remove the plastic cover by the side of the formatter cage. Remove the fan housing by the power connector by removing the two screws, disconnect the cable and pull straigt out. Now remove the big cable at the top and unwind from the high voltage ps. Remove the white connector in the middle of the low voltage ps. Next trace the white cable wires running from the ps to the dc controller and remove the cable from the dc controller. Now trace the fan cable for the fan in the front of the ps and remove it from the dc controller. Remove all the screws which secure it to the frame and pull straight out. Move the fan in front from the old ps to the new and reverse instructions...
Take off the large metal side cover. Look down at the bottom of the printer. The large box is the LVPS. Remove the screws holding it and follow the wiring up to where it plugs in and pull the connectors off. You'll also have to remove the fan above the LVPS on the top right side of it. You will have to take the fan mounted on the LVPS off and put it on the replacement LVPS as they don't come with fans.

Posted on Oct 23, 2007

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Re: Hp Laserjet 8150 LVPS replacement

Is there any replacement for HP 8150 Laser jet printer or it is still in exixtence?

Posted on Oct 18, 2010

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Error message of: 50.2 Fuser error

Fuser isn't heating up to the correct temperature.
Power off and let the fuser cool off. Remove it and reseat it.
If error still there replace the fuser.
If that doesn't fix the problem, replace the low voltage power supply(LVPS)

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If you have swapped power outlets, and still have no power, you would most likely start with the replacement of the (LVPS) which is the Low Voltage Power Supply. MFG Part # RG5-1876-000CN

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HP 8150 error code of 57.5 comes up, I cycle power, I have checked all the cables and still comes up with error code. Does anyone have any suggestions?


Error code 57.5 in HP 8150 means that printer fan error has occurred with the power supply fan. This issue can also be due to laser/scanner fan. Make sure both the fans are working perfectly fine. If the fans are fine, then the error is due to DC controller board.

To resolve this error turn off the printer for 4-6 hours (atleast 4 hours), this will reset the error. However, even after 4 hours you still can see the error then please check and replace the fan1 (power supply fan). Also, check for any burnt components on the dc controller board.

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No power on hp color laserjet 5550

you can download this is printer user's guide (under "download now" near the bottom of the page) help you.

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I just reviewed both of the above fuser issues (50.2 & 50.3). Both are highly likely (even if recently replaced) fuser damaged. I have included below a link to a free HP service manual for your machines. Start on page 309 using a volt/ohms meter to test the fuser. To address the "Guest" inquiry regarding the HVPS, there is a separate HVPS however please be aware that it is not part of the fusing circuit in this machine. If anything it would be the LVPS (Low Voltage Power Supply) however very remote. Odds are maybe 1 in 200 on your best day. I'd put 10 fusers in the machine before I bought 1 LVPS. This machine is known to eat fusers. The HVPS and LVPS at this time are just about bulletproof. PLEASE TRY TESTING THE FUSER AGAIN USING THE MANUAL PAGE 309 TO 311. If your really want the power supplies though, they are on the part number list at the end of the manual. I just looked it up and we have repaired 74 of machines to date with not one PS ever used. 59 of the 74 have been for fuser issues.

Here's the manual link:,%202830,%202840%20Parts,%20Service%20Manual.pdf

Hope that helps you both. :)

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For any fuser error, the first thing that should be done is replacing the fuser. If the error still shows up after wards, it could be the LVPS (Low voltage power supply) or a board.

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Hp lj 8150 error 50.1fuser error

Unless someone else replies with the identical fault and remedy, my best suggestion is to get a copy of the service manual. There may be a fee but you will be sure of following the correct diagnostic procedure. It sounds like you are capable of this. Good luck.

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