HP4015 LJ Cartridge detection

[spike1496]

I have a message of 'Install black cartridge', even after trying multiple cartridges.. I replace the cartridge sensor in the "roof" but that didn't help..Any ideas??

[Big Al]

There are several spring like contacts that carry various voltages, ground connections and a signal line that tell whether there is toner in the cartridge.
If any of these are broken or bent you will get that indication. You may have to look at another printer like this one to spot the problem.
Al

[spike1496]

There are several spring like contacts that carry various voltages, ground connections and a signal line that tell whether there is toner in the cartridge.
If any of these are broken or bent you will get that indication. You may have to look at another printer like this one to spot the problem.
Al
Thanks..I replaced the power supply, and now I have a solid 50.09 error!! Replacing the fuser 3 times didn't affect it one bit ??

[Big Al]

Here are some things to try that I got from the Internet:
1. Power cycle the product to determine if the error is persistent.

2. Verify that the correct fuser model is installed in the product.

3. Verify that the correct voltage fuser is installed in the product.

4. Verify that the fusing assembly is firmly seated in the product chassis. Reseat the fusing the assembly, and listen for a “click” at the end of the assembly when you insert it into the product.

5. Verify that the connection to connector J82 on the DC controller PCA is firmly seated.

6. Inspect the fusing assembly connectors, at the front of the assembly, and the connectors on the high-voltage power supply PCA. Look for bent pins or debris. Clean or straighten the pins if necessary.

7. If the error persists, replace the fusing assembly.

8. If the error still persists, replace the high-voltage power supply

Al