Gasboy 1000 Series FMS Diagnostic Manual - Manual (Page 123)

GASBOY Series 1000
7-4 03/07/03
REPLACING THE RAM CHIP(S)
IMPORTANT: Before replacing RAM chips, be sure to poll the site and/or print out all the
site's data (if possible).
Card or cardless systems prior to version 8.1 have only one 32K RAM chip, located in socket U23.
Card and cardless systems version 8.1 or higher and FleetKey systems have two RAM chips, an
8K and a 32K, located in sockets U23 and U22, respectively. When replacing both RAM chips,
replace the 32K RAM located in socket U23 first. Then run diagnostic test 6. If the system fails
the test, replace the 8K RAM in socket U22.
Remove Old RAM
1. Locate the RAM chip in the U23 (or U22) socket of the MPU PCB. This socket is located in
approximately the center of the MPU PCB board. (See page 2-8).
2. Place a small slotted screwdriver gently between the RAM chip and the socket, and pry the
RAM chip away from the socket. It may be necessary to pry the chip slightly from one end
and then slightly from the other end, alternating ends until it can be removed without bending
or breaking its pins.
Insert New RAM
3. Locate the small shiny circle on one corner of the RAM chip; this indicates Pin 1. Position
the new RAM chip so each of its pins are properly lined-up with the U23 (or U22) socket on
the MPU PCB. The small shiny circle (Pin 1) should be at the upper lefthand corner of the
chip when it is positioned in the MPU PCB.
4. Firmly press the RAM chip into the socket. It is important to be sure that the pins are aligned
with the socket; use of excessive force can cause the pins to bend when they are misaligned.
5. Use diagnostic test 1 or code card to set the password to GASBOY.
6. Reset and reload system data.
REPLACING THE ROM CHIP
IMPORTANT: Before replacing ROM chips, be sure to poll the site and/or print out all the
site's data (if possible).
Remove Old ROM
1. Locate the ROM chip in the U21 socket of the MPU PCB. This socket is located in
approximately the center of the MPU PCB board and to the left of the RAM chip. (See page
2-8).
2. Place a small slotted screwdriver gently between the ROM chip and the socket, and pry the
ROM chip away from the socket. It may be necessary to pry the chip slightly from one end
and then slightly from the other end alternating ends until it may be removed without bending
or breaking its pins.