Gasboy 1000 Series FMS Diagnostic Manual - Manual (Page 93)

GASBOY Series 1000
6-8 03/07/03
KEYPAD PROBLEM
Series 1000 does not respond correctly to keypad entries. When key is pressed, wrong
digit or no digit is displayed.
Possible Cause Checks Corrective Action
Defective keypad or MPU
PCB. Verify that all pumps are idle
and turn off the power to the
Series 1000. Unplug the rear
connector from PC PCB for
pump number one. Plug
simulator connector into
vacated position on PC PCB.
Unplug keypad connector J8
on MPU PCB. Plug keypad
cable into keypad connector
(P1) of simulator. Turn on AC
power switch in Series 1000.
Press any button on keypad.
Both LED's for each number
should light on the keypad
tester. If they don't, the
keypad has failed the test.
If both LED's light for one
number, test each number on
the keypad. If the LED's light
for each number, the keypad is
OK and the problem is the
MPU PCB.
Replace the keypad if it fails
the keypad test.
Replace the MPU PCB if the
keypad passes the keypad
test. See Replacing an MPU
PCB.