Only happens on cardstock. I can see the cyan is very faint (almost non-existent) on the itb belt during grad adj and copying/printing. Replaced cyan drum. Swapped yellow and cyan primary transfer rollers (inside itb assm). Upgraded system software to 84.01 (Dc Con v60). Cleaned out machine interior. All with no fix. 1 or 2 copies will occationally come out OK, but not many. Anyone ever see this?
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It cloud be your card stock. Whats the Gms on that cardstock? -
Standard 80lb cover and 67 lb vellum bristol. I have tried other stocks as well as "heavy 2" through the bypass and had the same problem. This is definately a problem of bad transfer, bad bias contact or something similar. I have another customer that has the same problem only with yellow and black (simultaneously) on 80lb hammermill color copy cover. Luckily the second customer has 2 machines and rarely runs card stock.
Any chance there is an adjustment for low/high humidity like on the old CLC's? I didn't see any in the book or service mode.Comment
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Its seems like the primary transfer is not pulling the image off the drum. Why don't you try replacing those primary transfer rollers.Comment
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remove CYAN primary transfer roller/ look in at the plastic end holders for C roller/ they crack and pressure springs can fall out on one or both ends, roller can slide out/once this happens roller is not butted to ITB belt for proper transfer/ something to overlook even when swapping rollers. !!!!!
FS7-2782-000 8 springs
FB6-2945-010 4 rear plastic bushings/holders
FB6-2944-010 4 front " " "
**extra ****Canon reports >there are some issues with drum drive assembly going bad/shows the symptom u mentioned washed out single color only on heavy paper/CQ ok on plain paperLast edited by teckat; 02-19-2010, 01:54 AM.**Knowledge is time consuming, exhausting and costly for a trained Tech.**
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Thanks for the replies. I did inspect and clean the primary plastic end holders as I was swapping them (I've seen that on c3200's). New transfer rollers are on order. I know the springs are in place but I may have missed a crack. I'll check again when I replace the transfer rollers.
As far as the drum drive assm goes, is the fix to replace the entire drum drive assm? - Is it the "developing drive assm" FM2-5362 or "drum drive assm" FM2-5360? BIG price differance.Comment
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First try this/ load card stock in bypass tray/ select plain paper on control paper/ and print five pg10 test prints/ inspect.
If you have wash out on all colors on ITB unit when u select heavy mode, I would look in at ITB Drive Motor M1
You said it is on only one color ????
Canon Tech Pub quotes "While printing or copying with Heavy Media selected the magenta portion of the document would intermittently drop out". rep.= Drum Drive Assembly FM2-5360-000**Knowledge is time consuming, exhausting and costly for a trained Tech.**Comment
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It is definately only happening on cyan with a full color copy. I'll order the Drum drive assm and post back after install. Thanks.Comment
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Follow-up:
The drum drive assm took care of it! Thanks for the help.
BTW, anyone needing to do the same thing be advised - It's a good 2-3 hour service call.Comment
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Nice fix.
Thanks for posting back.Comment
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Good stuff.
BTW what was the copy count on that copier? Just curious.Comment
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