Xerox C70 Duplex Jam Error Codes 077-109 and 077-118 – Need Help!

[chemicalx50]

Hi everyone,

I'm experiencing recurring paper jams with my Xerox C70, specifically showing error codes 077-109 and 077-118 during duplex printing. Here’s some more information:

Problem Description: The printer consistently jams during duplex printing sometimes like every other page it jams, and the errors 077-109 and 077-118 are displayed. I’ve tried clearing the jammed paper and restarting the machine, but the errors persist.

Steps Taken:

Checked and cleared any visible paper jams in the paper path.

Restarted the printer several times.

Cleaned the rollers as per the user manual's instructions.

Ive run IOT checks 007-011- 15 but I don't know what exactly to look for or clean I've seen where person talk about brass and transport belt being loose.

I am a printer tech by profession so i know my way around the xerox c60 but im not a professional.


Paper Type: it's jams basically all type of papers letter to tabloid.


Any advice on how to resolve these errors?

Thanks in advance!

[big mike]

Pull out the main drawer. Remove the fuser and reach down, grab the skinny duplex drive belt. It should turn easily in both directions.
I fought duplex jams on my C75. The long skinny belt drives 18 pulleys. After cleaning all the bearings it would run for a day or two, then make a grinding noise and jam! I ended up replacing all the parts with the improved ones (with ball bearings) from The Parts Drop. Get the double drive gears, a new belt, brass bushings and the pulley kit...approx $300. After I installed them it ran hard for a month without any more jams!

[chemicalx50]

Pull out the main drawer. Remove the fuser and reach down, grab the skinny duplex drive belt. It should turn easily in both directions.
I fought duplex jams on my C75. The long skinny belt drives 18 pulleys. After cleaning all the bearings it would run for a day or two, then make a grinding noise and jam! I ended up replacing all the parts with the improved ones (with ball bearings) from The Parts Drop. Get the double drive gears, a new belt, brass bushings and the pulley kit...approx $300. After I installed them it ran hard for a month without any more jams!

Thanks, Big Mike! I went ahead and cleaned the bearings and adjusted the belt as you suggested. It worked well for a few days, but then it stopped again. I advised my client that we'll need to order the upgraded kit. Appreciate the help!