Kurzweil K250 - Page 84

NOTE: The CHECKSUMS for the EPROMs on Rev. B CPU boards
with sampling are not checked by the diagnostics "(Locations
U26, U41, U25 and U40). "
The 8254 timers are the next CPU components checked. The
outputs of the timers are Pins 10, 13 and 17. The prompt is:
INIT TIMERS? Press YES
Kurzwell 250 Service Manual, Chapter 4
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