Gasboy 1000 Series FMS Diagnostic Manual - Manual (Page 89)

GASBOY Series 1000
6-4 03/07/03
Possible Cause Checks Corrective Action
MPU PCB jumper(s) not
installed, making poor
connection, or incorrect
selection. On the JP3 jumper patch,
verify that correct MAPTYPE
jumper positions are selected
for the ROM address being
used. Locate ROM address
on ROM label.
Verify good electrical
connection.
If ROM address is 8000, 9000,
or A000, install jumper(s) to
select the required address
(see page 2-14). If ROM
address is 7000, remove all
jumpers to select the 7000
address.
Make good electrical
connection if a faulty one
exists.
Missing Auxiliary
Communications PCB. Verify that the auxiliary
communication port PCB is
present and properly
connected. Install PCB, if missing. Check
connections and repair, if
necessary.
Defective MPU PCB. Verify that all cables are
properly connected to the MPU
PCB. Replace MPU PCB assy. if all
cables are correct.
Defective 32K RAM. Verify that 32K RAM is
properly installed and in
correct socket (U23). Note:
The 32K RAM chip is marked
DS1235Y or bq4011 YMA-150. Replace 32K RAM if it was
properly installed in socket
U23 with no bent pins.
Defective Auxiliary
Communications Port PCB. If your system has the tank
monitor interface option, or the
receipt printer option, verify
that the auxiliary
communication port PCB is
correctly and securely
connected to the MPU PCB. Make good electrical
connection if faulty one exists.
Replace the Auxiliary
Communications Port PCB if a
good connection exists but the
problem has not been
corrected.
Defective 8K RAM (FleetKey
or software versions 8.1 or
greater). Verify 8K RAM is properly
installed and in correct socket
(U22). Note: The 8K RAM
chip is marked DS1225Y or
bq4010 YMA-150. Replace 8K RAM if it was
properly installed in socket
U22 with no bent pins.
Defective ROM. Verify ROM is properly
installed and in correct socket
(U21). Replace ROM if it was properly
installed in U21 socket with no
bent pins.