The TSU7500 falls under the Philips Pronto NG Family
That being said, I own a TSU7500 myself. Hasn't been in use for years though as I upgraded to the TSU9600. Performed a quick forum search as I've chimed in on this error message in the past. See here
. Should be helpful. A number of people chimed in as to the possible resolution.
Last edited by Lowpro on July 17, 2018 12:39.