Printer C760 Hi, I am getting an error on my C760 that says 103 Service IPU error. What's the problem?

It is caused by Resetting / Memory Clear.

https://www.copytechnet.com/forums/ricoh-savin-gestetner-lanier/137996-mp-c4504-sc220-04-after-all-clear-performed.html

1. Turn the main power OFF/ON.
2. Check for condensation on the LDB.
3. Reconnect the connectors between LDB (Synchronizing detector board)
and IPU.
4. Replace the LD unit.
5. Replace the IPU
6. Replace the harness between LDB (Synchronizing detector board) and
IPU.

https://www.google.com/search?q=SC220-04+ERROR+ON+RICOH+MP+C4504SP

..

http://terraofficesolutions.com/forum/index.php?topic=27.0

Quoting from web page shown:

Ricoh Error Code 322, SC322 Fix - Printer, Copier, Fax Machine « on: October 01, 2012, 07:40:17 pm »
The Ricoh copier error code SC322 or 322 is a laser synchronization problem.

This error code can mean:
Bad LDB
Bad IPU Board
Bad Controller Board
Bad Detector Board
Check the wires between I/F and Detector.

After the polygon motor reaches standard rotation speed and the LD unit fires for 400 ms, the laser synchronization detector does not get a signal.
• wires between detector and I/F disconnected or bad
• Detector is installed incorrectly
• Detector board is bad
• IPU board bad

To reset this error try the code:
"Clear Mode"+107+"Clear/Stop" hold for 5s.
Turn ON and OFF the Main Switch.

If the problem persists you may need to contact a local service technician to take a look at your copier.

http://terraofficesolutions.com/forum/index.php?topic=27.0

Perhaps this article on 900 Errors on a Lexmark C752, C760, or C762 will help. Just click on this link: http://bit.ly/c2xr1t. There are embedded links on the page for additional info. If you need further assistance, don't hesitate to contact Lexmark technical support or your authorized service provider.

http://www.lexmark.com/publications/pdfs/c760/eng/userref.pdf all explained in manual above.
www.laserpros.com/pdf/LX-5060-C760-C762-Manual-toc.pdf
Above is a service manual.

lexmark basically has said that if this error doesnt clear by powering off the machine and powering it back on again then it will need to have a service call. this error means there is a problem with the itu belt assembly.below is what they say. the steps were to pwoer it off and back on again using a grounded wall socket

This error normally requires a service call. However, certain rare occurrences, such as a stray static discharge in the vicinity of the printer or a power fluctuation, can cause a false 103 ITU error message to appear. In these cases, the error is only temporary and can be easily resolved without service. Follow the steps in the table.
Step Action 1
Power the printer off, wait ten seconds, and then power the printer back on.
Did the error message return?
Yes: Continue to step 2
No: Print a test page. If the page prints, the printer is functioning correctly. 2
If possible, connect the printer's power cord directly into a grounded wall outlet. In rare instances, a surge protector or uninterruptible power supply (UPS) can generate false error messages.
Did the error message return?
Yes: Continue to Contacting Lexmark below.
No: Print a test page. If the page prints, the printer is functioning correctly.

http://support.lexmark.com/index?page=answers&startover=y&locale=en&userlocale=EN_US&productCode=LEXMARK_C760&segment=DOWNLOAD&question=C760+manual#4

if you have no lights on the display, the possibility of a bad power supply is good, bring it to any of the computer store with a service or a computer repair shop, have them check it. if you have voltmeter, test the output from the low voltage transformer that goes into the printer against the rating on the transformer.

I have the same problem. Unplugging the phone resets it, but the problem keeps reoccurring.

PROBLABLY, TAKE IT TO A COMPUTER PLACE AND ASK THEM FOR HELP, IF NOT, CHECK CONNECTION BETWEEN THE COMPUTER AND SOURCE OF ELECTRICITY, MAYBE IT DOES NOT GET ENOUGH POWER

Are you sure the new location is a working port on the system? IPU suggests a VoIP phone, not a DKT2010. Are you sure you have the right phone? You cannot swap an IP phone with a DKT phone.