http://www.ssclg.com/epsone.shtml
The "time bomb" is the protection counter / waste ink counter - strictly speaking, the waste ink pad should be replaced or cleaned when resetting.
There have been some online guides to pad removal and replacement, but they seem to have disappeared after wandering through hopeless free hosts and *******'s like Web1000 (get a popular site, then toss it and use the name for any old garbage!)