HP CLJ 4600

[Phil B.]

ok it had a 51.2C error ( cyan laser ) replaced it.... everything ( print not borders ) has shifted to the left.
ran all registration/calibrations *NG*
performed DCC reset 5 times *NG*
new OEM toners *NG*

never had an issue with doing a laser before

and yes it is a 4600 laser not 4650
OUP4600.pdfOUP4600.pdf


WTF?

[cscce]

Have you reset the lasers to "home" position? If not, try this - it worked for me on a 4700.
Laser re-alignment procedure is as follows:


Let machine warm up and indicate ready
Open upper fuser cover
Press and hold engine test button on rear for 3 seconds
Close upper fuser cover
Immediately turn power switch off & back on again


This puts the lasers back to factory setting and then let the machine calibrate itself and all is normally o.k.

[Printerdude]

There is a DC controller calibration reset. Try this procedure.

[Phil B.]

There is a DC controller calibration reset. Try this procedure.

ok that is what I referred to as DCC reset... yes did it 5 times.

[Phil B.]

Have you reset the lasers to "home" position? If not, try this - it worked for me on a 4700.
Laser re-alignment procedure is as follows:


Let machine warm up and indicate ready
Open upper fuser cover
Press and hold engine test button on rear for 3 seconds
Close upper fuser cover
Immediately turn power switch off & back on again


This puts the lasers back to factory setting and then let the machine calibrate itself and all is normally o.k.

that is not an option on this unit.. yes I had remembered that from the 4700 and 5500 I have done. for the DCC reset/calibration is basically the same .. you just have to press engine test in for longer amount of time... thanks

[Phil B.]

There is a DC controller calibration reset. Try this procedure.

um yeah did this five times... wonder if it could be a defective laser?

also cold reset and NVRAM clear

[Lance15]

Belt?

Have seen this exact issue on 4700's.

[Phil B.]

Belt?

Have seen this exact issue on 4700's.

yeah don't have one... but customer might have to break down an buy one.

[Laserrick]

I have seen this many times. Usually happens when you put the scanner "tabs" into the white hanger before installing the back plate and clamping down with the wire clips. Unfortunately the scanners shifted a little. You're gonna have to go back in and reseat them. I usually look at the sides to make sure the "ears: are aligned on the left side after putting the 2 spring loaded holding bars in place before putting in the screw on each one. You can also look through the cartridge cavity with a flashlight at the scanner faces to check the alignment BEFORE you put on the back plate to make sure they haven't moved.

[Lance15]

I have seen this many times. Usually happens when you put the scanner "tabs" into the white hanger before installing the back plate and clamping down with the wire clips. Unfortunately the scanners shifted a little. You're gonna have to go back in and reseat them. I usually look at the sides to make sure the "ears: are aligned on the left side after putting the 2 spring loaded holding bars in place before putting in the screw on each one. You can also look through the cartridge cavity with a flashlight at the scanner faces to check the alignment BEFORE you put on the back plate to make sure they haven't moved.

Ohhhh, yeah. That's right. I remember the scanners for the 46x0 printers are a little wonky to get back in juuuuust right. Maybe?