STC SmartScanIS, User Manual

Page: 329 / 391

EUD-2016026-00 Rev.2, SmartScanIS User’s Guide for Union Pacific, 14 January 2021
329
10 Using a chip removal tool or small slotted screwdriver, lift the EPROM from U3 by
prying gently, one end at a time, until the pins are free of the socket.
11 To insert the new EPROM in U3:
a Orient the notch on the chip to the notch on the socket.
Putting the chip in backward or bending one or more of the pins may damage
the SmartScanIS.
b Line up the pins with the socket contacts.
c With a firm rocking motion, press the EPROM into the socket.
12 Gently replace the Scanner Interface board onto the System Interface board.
13 Using a #2 Phillips head screwdriver, replace the six screws that hold the Scanner
Interface board to the System Interface board.
14 Check the orientation of all cables before plugging them into the Scanner Interface
board.
15 Reconnect all cables to the Scanner Interface board.
Doing the next step powers up the system.
16 On the Surge Protection Subassembly, toggle on both breakers.
17 Close the door on the SmartScanIS enclosure.
15.2 Replacing Speech Data Chips on Talker Board
On the Talker board, the 16 sockets, labeled U14 through U29 , are for 27C256, 27C512, or
equivalent EPROMs. These chips contain the digitized words and phrases required for voice
announcements.
To replace one or more of the speech data chips (in the sockets labeled U14 through U29 ) on
the Talker board:
1 Be sure you have on hand a chip removal tool (or small slotted screwdriver) and a
#2 Phillips head screwdriver.
2 Open the door on the SmartScanIS enclosure.
Doing the next step powers down the system.