Owner`s manual

12
Bay Technical Associates, Inc.
PO Box 387, 200 N. Second Street
Bay St. Louis, MS 39520 USA
Phone: [phone] or 800-523-2702
Web Site: www.baytechdcd.com
Fax: [phone]
10 FEDERAL COMMUNICATIONS COMMISSION RADIO
FREQUENCY INTERFACE STATEMENT
NOTE: This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with this manual may cause interference to radio communications. The equipment has been type tested
and found to comply within the limits for a Class A digital device pursuant to Subpart J of Part 15 of FCC rules, which
are designed to provide reasonable protection against such interference in a commercial environment. Operation of
this equipment in a residential area is likely to cause interference in which case the user, at his own expense, will be
required to take whatever measures may be required to correct the interference.
The user may not, under any circumstances, other than specified in the manual, under installation and maintenance
sections, attempt any service, adjustments, or repairs on this unit. It must be returned to the factory or authorized
service agency for all such work.
11 DS73 EPROM UPGRADE
You will receive two EPROMs (chips with label A & B) for each module to be upgraded.
The tools you will need are:
Phillips-head screwdriver
IC DIP extractor or a pair of curved needle-nose pliers
1. IMPORTANT: Remove power from the unit by depressing the power switch on the front of the unit to OFF
and removing the power cord from the AC outlet.
2. Remove the appropriate module by loosening the two thumb screws that attach the connector board I/O
module to the chassis. Pull the module out of the DS-Series base unit..
3. Refer to Section 12 (Mechanical Layout) and locate sockets U7 and U6.
4. Note how the existing EPROMs are installed in the sockets. Remove the existing EPROMs from sockets U7
and U6 with an IC extractor or needle-nose pliers. Gradually loosen each side of the chip, alternating the
pliers from side to side. Do not bend the pins on the EPROMs. Remove the loosened EPROM completely
from its socket.
5. Install the new EPROMs into sockets U7 and U6. Be careful to observe the correct physical alignment
given in the steps above.
a. The EPROMs should be placed to the rear of the sockets. The vacant pin receptacles of the socket are
adjacent to the notch on the socket. Insure that the notch of the EPROM and the notch on the socket, face
the same direction.
b. Install the “B” EPROM into socket U7(see the label on the EPROM). The “B” EPROM can be identified
with either a DS73-B.
c. Install the “A” EPROM into socket U6(see the label on the EPROM). The “A” EPROM can be identified
with either a DS73-A.
d. Be careful not to bend any of the pins. Insure all of the pins enter the receptacles of the sockets.