

The wrong PSU can:

The PSU must be exactly as shown below:
1st generation Rio Pro & All 2nd generation printers inc all product variants.







*Pronto ONLY if the serial number is formatted as just 8 digits, like this: 12345678 (does NOT contain a Letter, like 12F3456)
The information on this page will help you identify which electronics version your Pronto was built with.
The label on the PSU should be like this:
Click image to enlarge