Duplex printing leaves one side normal and the other side a small image

cant print thick three paper in duplex unless you go manual print one side stick in draw then print other side thick three is like a pizza box duplexer for a 350 is less 6" of room.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

check between the rollers there will be small bits of paper jammed in that is the reason.

what media are you using and what is the weight of the media you are using and does the copier know this and is correctly set

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

Verify if the problem apaire when you make copy or just when you printing.If the problem is only when you printing change the driver,install a PCL driver.Thr PS driver make problem when print PDF format.

is the file type a PDF? do you see the print as a stamp on your copy? ..

Select the simplex/duplex mode.
1 sided - 1 sided
1 sided - 2 sided
2 sided - 2 sided
When using 1 sided to 2 sided the originals must be even

The Konica Magicolor 1690MF Printer/Copier/Scanner is connected with an Ethernet Cable or USB Cable. It is not equipped to operate as a wirleless printer. It has a 10Base-T/100Base-TX Ethernet interface port and a USB Revision 2.0 High-Speed compliant port.
To do two-sided printing you must have the duplex (double-sided) option installed. This also requires either Tray 2 or the Attachment to be installed underneath your machine. Tray 2 is the optional lower feeder unit which increases capcity of your machine to 500 pages. The Attachment comes with the Duplex Unit.
Only Letter and A4 plain paper (16-20 lb bond) can be autoduplexed. With the duplex accessory installed you can do duplex or double-sided printing automatically.
From within Printer Preferences select Two-side Printing > Automatic. Shoud have choices of Off, Manual or Automatic. Within the Layout Tab for your work you may also be able to specify duplex (double-sided).
Should you have continued difficulty, please reply and advi e if the duplex option is installed and with which software and operating sysytem you are using.
Thank you for using FixYa!

yes go to printer properties and put duplex mode

Hello
See if you have selected weight paper from the tray in the duplex mode.
Weight paper is selected in duplex mode only from the bypass.
So you check that the paper in the tray 1 or tray 2 must be plain paper and in duplex mode it can print normally.

CAUSE: The tri-fold printed on side is set incorrectly on the machine.

SOLUTION: To change the tri-fold from printing inside fold to printing outside fold, perform the following:
1. Press the Utility key.
2. Select Admin mode and enter the password.
3. Press Copier Setting.
4. Press the down arrow.
5. Press Tri-Fold Printed on Side Selection.
6. Press either INSIDE or OUTSIDE.
good lock