Notice to our valued customers who use LT4000M series (analog model)

Posted: August 2, 2013
Thank you very much for your continuous use of Pro-face products.
We have confirmed that the following symptom occurs in some models of LT4000M Series.
The symptom and corrective measures for this problem are indicated below.
We sincerely apologize for any inconvenience this may cause you.

Symptom descriptions

You may experience instances when analog signals are output while the LT4000M is starting up.

Applicable products

The followings are applicable products.

Applicable Products:

Product NameModel No
LT4000M Series LT-4201TM (Analog model)
LT-4301TM (Analog model)


External equipment connected to analog output terminals should be design so powering up occurs only after the LT4000M has started up.
Considering the above, if the LT4000M and external equipment have different power supplies, please design your system with momentary power interruptions in mind.


If you have any inquiries, please contact our sales office in your region. For contact information, please refer to the Our Locations page.