Specifications
Page E-2 Appendix E
E.2SIGNAL AND CHASSIS GROUND
The signal ground and chassis ground in your Alpha Micro computer are normally
isolated from one another and then tied together at a single point within the computer. If
your computer’s signal and chassis grounds are not tied together, they should be
connected at a single point within the computer chassis. The recommended method is
to connect these grounds together at the power supply. Figure E-2 shows the
recommended method of connecting the two grounds together in CEC power supplies,
which were supplied by Alpha Micro in many AM-1000 and AM-1200 computers.
Contact Alpha Micro’s Service Operations for information on other types of power
supplies used in AM-1000 and AM-1200 computers.
Any power supply modification should only be done by an authorized service technician.
C34
C33
C32
C31
DC SIDE AC SIDE
To tie AC and DC grounds together, you
must solder a wire across the leads on the
capacitor at location C31.
CEC POWER SUPPLY
(PRF-00038-00)
MAC945
Figure E-2. CEC Power Supply Modification
PDI-00172-10, Rev. A03