1640
Cause
The 1640 support code signifies that the printer has detected that the remaining ink in one or more of the ink tanks may have reached the lower limit line shown on the ink tank.
What to Do
To check the remaining ink level, visually inspect the remaining ink in the ink tank. The action you should take to resume operating the printer depends upon which function(s) of the printer you intend to use.
1. To PRINT or COPY
If you intend to PRINT or COPY, you should take one of the following steps:
(a) Press the OK button on the printer. If there is some residual amount of ink in the tank(s), you will be able to PRINT or COPY until the remaining ink is depleted, although image quality may diminish as the remaining ink in the tank(s) becomes depleted.
Please note that if you continue to PRINT or COPY when the remaining ink is below the lower limit line, the printer may consume excess ink as it attempts to return to normal image quality after it is refilled with ink.
Once you press the OK button, the function for notifying you of the remaining ink level will not operate. To restore that function, refill each color of ink to the middle line shown on the ink tank and press the printer's OK button for at least 5 seconds. This resets the remaining ink level data for all colors to full, and if any ink tank is not refilled to the middle line, the remaining ink level notification function may not work properly.
OR
(b) Refill the ink tank with the corresponding color of ink up to the middle line shown on the ink tank.
You will then be able to PRINT or COPY.
2. To SCAN or FAX
If you intend to SCAN (or FAX if your printer has that capability), you should take one of the following steps:
(a) Press the OK button on the printer. You will then be able to SCAN (or FAX if your printer has that capability).
After you press the OK button, the function for notifying you of the remaining ink level will not operate. To restore that function, refill each color of ink to the middle line shown on the ink tank and press the printer's OK button for at least 5 seconds. This resets the remaining ink level data for all colors to full, and if any ink tank is not refilled to the middle line, the remaining ink level notification function may not work properly.
OR
(b) Refill the ink tank with the corresponding color of ink up to the middle line shown on the ink tank.
