20 Most Recent Citizen iDP-3550 Matrix Printer Questions & Answers

Flashing (approx. once every second): Out of paper
Flashing (approx. twice every second): Mechanical error (Buzzer sounds once.)
Most likely your paper feed is giving you the error. Remove the current feed, ensure there are no paper jam & insert fresh paper.
If
Mechanical Error :: Quick blinking Buzzer Sounds continuously for a pprox. 1 second :: Reset the Power
switch
Paper End Blinks.:: Buzzer Repeats a short 3-time sound twice at intervals of 0.5 second.:: Set a new paper roll.
Paper Near End Blinks.(Once a second) :: buzzer Repeats a short 3-time sound twice at intervals of 0.5 second.:: Set a new paper roll.

Mechanical Error : If the printer mechanism has a greater load due to a paper jam, etc., the buzzer will sound and the SEL/ERROR lamp will blink to stop the printer mechanism.
Paper End : If the printer has run out of paper, the paper sensor in the paper path near the print head will detect the end of the paper roll, turn on the buzzer, and blink the SEL/ERROR lamp to stop the printer mechanism. If the paper is inserted into the paper path, the paper will be loaded.
Paper Near End : If the paper is running out, the paper near end sensor will be activated to turn on
the buzzer and make the SEL/ERROR lamp blink. Even after the paper near end is detected, a command can be used to print by the specified number of lines. (See a description on the command for setting the number of print lines after paper near end detection)
Finally
Backup Data Clear : When the power is turned on, depending on the SEL switch operation, the
backup data in the input buffer will be cleared according to the flowchart on the next page.
To clear the input buffer, turn on the power while pressing the SEL switch.
The following messages will be printed.
"Clear Data in Buffer"
"Cleared Data in Buffer"
To print the data in the input buffer, simply turn the power on.
The following message is printed and the data in the input buffer is printed.
"Power Down(Data in Buffer)

That is a setting in your printer setup menu under options or advanced. Page set up should come up under advanced or as its own tab.

try drivers for windows vista

Thank you for posting to Fixya.com and it is my pleasure to guide you.

To help you in the furture I have found the manual for reference. Click the link or copy paste it to download it. http://www.posguys.com/download/iDP3550UME_09E.pdf

From the manual for the Interface Cables, the manual has pictures.

4.2 Connecting the Interface Cable
1. Turn off the power. (Mating side included)
2. Check the top and bottom of the cable terminals, and connect to the interface connector.
3. Secure the cable terminals.
Serial interface: Tighten screws to secure.
Parallel interface : Turn clamps to secure.
4. Connect the interface cable to the computer.

4.3 Connecting the Drawer Kick-Out Connector
1. Turn off the power.
2. Check the top and bottom of the drawer kick-out cable connector and connect it to the drawer kick-out connector located at the lower section of the printer.
3. Screw the grounding cable of the drawer to the grounding terminal located at the lower section of the printer.
CAUTION: • Connect only the prescribed drawer (Solenoid) to the drawer kick -out connector.

Good luck and please post back that you are successful and give thumbs up if my solution has worked for you. If I can be more helpful just reply.

Try to turn the printer off and then on again. If that does not clear it you need to re-install the driver, the driver may be corrupt.