North Star DIMENSION Service Manual page 59

TROUBLESHOOTING
(cont.) Boot Problems
Symptom Explanation Solution
(continued )
3. If the DC voltages are not shorted to ground and
the system continues to blow fuses , you may
disconnect the power supply fuse-blowing circuit in
Ulveco power supplies only. This circuit blows the
fuse on a 110VAC system when it is plugged into
220VAC.
A triac is located in the center of the top edge of
the power supply (next to a black capacitor). Two
leads protrude from the top of the triac. The
longer lead is connected to a wire that plugs into
the power supply circuit board through a single
molex connector. Disconnect this connector to
disable the fuse-blowing circuit.
The system The brake on If a 30 megabyte drive is installed in the system, refer
boots from the 30 to the January 1985, Field Change Notice. A procedure
the fixed disk megabyte describes brake removal.
intermittently. drive may be
binding.
DIMENSION Service Manual 2-13