20 Most Recent HP LaserJet 9500n Printer Questions & Answers

check the connector that the fuser connects to for damage. If the plug is intact you will probably need to replace the power supply (Low Voltage PS) C8546-69003 is the part number on a unit of this vintage the part won't be cheap. A quick search on the net shows it from $350 - $600 Good luck

A sensor is usually a small black plastic module open in the middle and allows a plastic flag to enter and leave which breaks a circuit when entering and leaving. Most generally they do not go bad.

Hi, According to your problem replace the black cartridge or you can try to change the black toner of black drum. If you have already change the cartridge then check that you have installed the cartridge properly. Clean the cartridge and the drum properly with a dry cotton. Make sure that the inside toner is OK then reinstall the cartridge. Then reboot the printer. If it doesn't solve your problem then clear the memory of the printer. It will solve your problem.

50.6 error is an open fuser heating circuit
between the fuser and low-voltage power supply.
Problem could be the fuser, the low voltage power supply
or the DC Controller.
The 1st thing to do is replace the fuser. If you have another one.
You should really call a printer tech to look at it.

This error indicates a problem with the magenta drum rotation motor. Remove the magenta drum unit and reseat it. Restart the printer. If the error still continues then replace the drum. You can also look in the install slot for the magenta drum to see if there is any visible damage.

That error code indicates a failed fuser fan. You will need to get it replaced. PN: RH7-1522-000CN

No!
The 57.7 error says that the fuser fan could be bad.
If you take the back cover off the printer and look to the right, you will see two fans, one above the other.
The bottom fan is the one you want. It is probably clogged with dirt or else the dirt got inside the fan and is preventing it from spinning. Replace it

Error 57 is generally a fan fault ; on the LJ9500, 57.70 is indicating a fault with the fuser fan in particular.

plz do rate this post

Fuser fan is shot. Has to be replaced.
Rear, right side, the lower fan

This error points to the Fuser Fan see below for more details
Error 57.XX points to a fan problem in general

57.X
The printer detects that a fan motor
has failed.
X description
1 = cartridge fan (FM 3)
3 = low-voltage power supply fan (FM5)
5 = face-up delivery paper path fans (FM1 or FM6)
6 = paper-path fan (FM2)
7 = fuser fan (FM4)
9 = ozone/exhaust fan (FM7)

1 - Turn the printer off, and then turn the printer on again to clear the error.
2 - Check the indicated fan, and check for correct movement of the blades and motor.
3 - Check the connectors that apply to theX error:
1: J3078 and J820 on theT driver PCA.
3: J3 on the low-voltage power supply, and J102 on the DC controller PCA.
5: J3079 and J3087 at the fans, intermediate connector J086, and J811 on the T driver PCA.
6: J818 on the T driver PCA.
7: J819 on the T driver PCA.
9: J3089 at the fan, and J823 on the T driver PCA.

4 - Check connector J1 on the low-voltage power supply, J210 and J202 on the high-voltage power supply, J608 and J612 on the P driver PCA, and J806 on the T driver PCA.
5 - Replace the fan if voltage is supplied to it at power on and it fails. See chapter 6.
6 - Replace the T driver PCA. See" T-crg (print cartridge) drive assembly" on page 296.
7 - Replace the DC controller PCA if X = 3 (FM5). See "DC controller" on page 300.

To view the online service manual click here

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