I am getting no red what so ever on this machine. no error codes. printing from memory... still no red. I tried to do a stop test to see if there was toner on the transfer belt but the door would not open when I stopped it mid cycle. It appears that the drum and mag roller are turning. Not sure what I'm forgetting here, any help would be appreciated.
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Re: Lexmarl C748DE No Red at all
... you mean magenta?
Take a look at your magenta toner cartridge/toner brush on the developing roller. Is there any toner on the developing roller. Has the packing been removed from the magenta toner cartridge? Is the magenta drum installed? =^..^=If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
blackcat: Master Of The Obvious =^..^= -
Re: Lexmarl C748DE No Red at all
have you printed the print quality pages to see what that shows?Comment
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Re: Lexmarl C748DE No Red at all
Yup. No magenta. Lots of Cyan and Yellow buttons and black print.
Buttons.jpg
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Re: Lexmarl C748DE No Red at all
That's not the quality page. The print quality page is a multi-page diagnostic print that prints each of the four colors on a sheet of paper. I'd say that if your only missing one color (magenta), either the photoconductor for magenta is faulty or the charge roller associated with magenta on the transfer belt is faulty.Comment
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Re: Lexmarl C748DE No Red at all
i have seen issues on these models with the toner unit. replace it for a possible easy fix.Comment
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Re: Lexmarl C748DE No Red at all
I am quite sure the toner is new, have you seen issues like this with these magenta toner units right out of the box? Just to clarify, there is toner on the mag roller. When I wipe a small area on the mag roller with a clean, lint free cloth, it goes away when the motor turns on after the door is shut. The machine runs, no trouble codes. I have the transfer belt unit out of the machine and am going to go over the magenta transfer roller and connections with a fine tooth comb. If I do get to the point where I replace the toner I'll probably just send the machine to surplus. Also, what is the procedure for printing out the "quality page"?
Thanks!!
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Re: Lexmarl C748DE No Red at all
Turn off the printer
Hold down the 3 & 6 keys while turning the printer on
Release the buttons when the splash screen shows (you will also probably hear a beep)
Scroll down to PRINT TESTS
Scroll down to Print Quality Pages
Sounds like your making a big deal out of a simple issue. If you have no color of one color, focus on that. It seems you've already determined the TONER CARTRIDGE is fine. The toner cartridge alone doesn't put the print onto the belt. If that [toner] seems fine, focus on the DRUM and/or BELT.Comment
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Re: Lexmarl C748DE No Red at all
Thanks for your reply. Last week was crazy in the office so I didn't get to check in. I have separated the belt section from the cleaner unit, cleaned and inspected it and put it back together. I will put it back in the machine tomorrow and do the "Print Quality Pages".
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Some Print Quality pgs
The 1st Print quality page indicates no magenta toner when there is clearly magenta toner in the cartridge. I can see magenta toner in the window on the back of the cartridge.IMG_2322 (1).jpg I have not tried doing the sensor test, I will do it tomorrow.
1st of Print Quality.jpg2nd Print Quality.jpg3rd Print Quality.jpgComment
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Re: Lexmarl C748DE No Red at all
Do you really think that the only factor in magenta color reproduction is the presence of magenta toner in the cartridge? If that's truly the case you definitely need to hire somebody with skills. =^..^=If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
blackcat: Master Of The Obvious =^..^=Comment
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Re: Lexmarl C748DE No Red at all
Nope, that's not the case. i know enough about digital boxes. Am I a Lexmark tech, no. I got my nose dirty on Sharps for 20 years and Canon, Minolta and Mita for 5 years before that... Last machine I was factory trained on was a sharp MX-M1100. I retired from the copier business in 2010. I now work in an office the scans 4 million documents a year on 3 Kodak i1860 scanners. My boss was gonna send this Lexmark machine to surplus but I asked for it because I know in time I can fix it. Jus looking for some Lexmark tips here, that's all.
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