|Article ID: ART164632|||||Date published: 02/19/2016|||||Date last updated: 04/19/2019|
Click here to view an enlarged view of the timing strip.
The timing strip is a clear, plastic strip approximately 1/4 inch in height positioned horizontally across the center of the unit, just in front of the carriage drive belt. The timing strip contains many thin black vertical lines that help determine the carriage position during operation.
During certain uncommon tasks such as the removal of a paper jam, it is possible to inadvertently touch a lubricated area on the printer's chassis causing a small amount of grease to be deposited onto the timing strip.
Grease on the timing strip may result in poor print quality including; mis-aligned or distorted characters, vertical lines or, in some cases, an inoperable error condition (such as 5100) or knocking / grinding noise.
In most cases, it is easy to remove the grease from the timing strip using common household items. If you wish, you may follow the steps below to remove the grease from the timing strip.
-Clean, unused cotton swab
-Small amount of Isopropyl Alcohol or window cleaner
-Flashlight or other light source
|Carriage is centered|
|Carriage is to the right|
It looked like there was a smudge on he timing strip I cleaned that off and the printer still skips every other line. This was not a gradual issue, one day printer worked fine, the next it started skipping lines.
Because cleaning the encoder did not clear up the printing issue that you are experiencing, your PIXMA MG7720 would require service. You are eligible for Canon's Upgrade Program. This is for out of warranty units which have been diagnosed to require service, or for some reason are incompatible with a new or upgraded system. This option allows you a one-time opportunity to purchase a replacement product, discounted from the list price.
To help you get up and running quickly, we also offer free standard shipping (if the order is completed by 12:30PM ET). If you would like to take part in this option, please call our Sales Department at (866) 443-8002. They're available weekdays and Saturdays after 11 AM ET (8 AM PT). Let them know you have been working with technical support and the Canon Upgrade Program was offered.