Message Eprom Socket - Allen-Bradley A-B QUALITY DL20 Series User Manual

Appendix C
Creating EPROM FIles
Inserting the EPROM
MAIN CIRCUIT BOARD
Display Tube
C–4
To insert a programmed EPROM into the DL20:
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Important: An EPROM can only be programmed and inserted into a DL20
display having 16K bytes or less of messages programmed into RAM.
1. Loosen the three cover screws and lift the top cover off the DL20.
2. Insert the EPROM into the socket designated IC18. See Figure C.1.
Pin #1 of the EPROM should be in the upper left corner of the socket as
you face the front of the DL20.
Figure C.1

Message EPROM Socket

FRONT OF DL20
3. Replace the cover and tighten screws to a torque of 10 inch/lbs.
ATTENTION: Disconnect all power from the DL20 before
removing the cover. Failure to do so may result in electrical
shock or damage to the DL20.
ATTENTION: Make sure you are properly grounded to prevent
damage from Electrostatic Discharge (ESD). An ESD grounding
strap is recommended. Failure to do so may result in damage to
the DL20 circuit board.
IC16
IC15
IC14
Pin #1
MESSAGE
EPROM
SOCKET
IC17 IC18 IC20 IC21