Gasboy CFN Series Diagnostic Manual - Manual (Page 185)

Island Receipt Printer
03/19/04 5-15
Paper low lamp is lit.
Possible Cause Checks Corrective Action
Paper low signal was falsely
triggered due to improper
paper roll positioning. None. Cut the paper where it comes
off the roll. Press the PAPER
FEED switch until the paper
empties from the
printer/cutter mechanism,
causing the PAPER OUT
lamp to light. Reload the
paper as shown in
Maintenance earlier in this
section.
Receipt printer is low on
paper. Check how much paper is
remaining. Replace, if low on paper.
Broken paper low sense
switch. Check if switch roller arm is
bent or broken. Replace if bent or broken.
Defective paper low sense
switch. Using a DC voltmeter, place
the positive probe on pin 2
and the negative probe on pin
1 of P3 on the Star Status
PCB. +5VDC should be
measured when the paper low
sense switch is closed (paper
roll installed) and 0VDC when
the switch is open (paper roll
removed). If the proper voltages are not
measured, pull off the P3
connector on the Star Status
PCB. Measure between pins
1 and 2 of P3. If +5VDC is
measured, replace the paper
low switch.
If +5VDC is not measured,
replace the RS-232 Reader
Terminal CPU PCB.
Defective lamp driver IC on
RS-232 reader terminal CPU
board. Momentarily press reset
switch S1 on the RS-232
reader terminal CPU board Replace RS-232 reader
terminal CPU board if lamp
stays lit.