Gasboy CFN Series Diagnostic Manual - Manual (Page 164)

GASBOY CFN Series
4-48 03/19/04
Constant beeping at ICR.
Possible Cause Checks Corrective Action
Reader terminal program
problem. None Power ICR down and up.
Defective keypad. None Pull keypad cable off of
keypad connector P1.
Temporarily attach a new
keypad and run self-test 6.
Defective reader CPU board. None Replace CPU board if
replacing keypad did not fix
problem.
Defective power supply. None Replace power supply.
Does not respond correctly to keypad entries. When keypad is pressed, wrong digit or no
digit is displayed.
Possible Cause Checks Corrective Action
Defective keypad. Pull keypad cable off of
keypad connector P1.
Temporarily attach a new
keypad and run self-test #6. If new keypad fixes problem,
remove old keypad and
permanently install new
keypad.
Defective Reader Terminal
CPU board. Run self-test # 6. Replace Reader Terminal
CPU board if self-test 6 still
fails.
Characters on ICR LC display appear too light or too dark.
Possible Cause Checks Corrective Action
Improper viewing angle
adjustment. None. Adjust R9 on the I/F board for
a Densitron display or RX on
the Okaya display.
Defective LC display and ICR
LCD I/F board. None. Replace the LC display and
ICR LCD I/F board if the
desired results were not
obtained by adjusting the
viewing angle.
LC display backlight turns on or off at improper light levels.
Possible Cause Checks Corrective Action
Improper backlight sensitivity
adjustment. None. On the ICR LCD I/F board,
turn R8 clockwise to make the
backlight turn on at lower light
levels or counter-clockwise to
make the backlight turn on at
higher light levels.
Defective LC display and ICR
LCD I/F board. None. Replace the LC display and
ICR LCD I/F board if the
desired results were not
obtained by adjusting R8.