Canon PIXMA MP500 User Manual page 18

(23) Rear Cover
Open when clearing jammed paper.
(24) USB Connector (for computer)
This is the connector used to connect the machine to a computer using a USB cable.
Important
Note
16 Before Printing
While the machine is printing from or scanning images to the computer, or
the computer is in the sleep mode or standby mode, do not disconnect
and connect the USB cable.
For information on how to install the Print Head and ink tanks, refer to
the Easy Setup Instructions.
Ink Tank Lamps
You can check the status of each ink tank according to the way its
lamp flashes.
On: The machine is ready to print.
Slow flashing (about three seconds): Ink is low. Prepare a new ink
tank. For details, see
page 89. Fast flashing (about one second): Ink tank is empty, or the
machine is not ready due to an error. For details, see
Message is Displayed on the LCD" on page
Off: An error has occurred and the machine is not ready to print. For
details, see "An Error Message is Displayed on the LCD" on page
"Knowing When to Replace Ink Tank" on
"An Error
105.
Chapter 1
105.