Gasboy CFN Series SCII Start-Up Manual - Manual (Page 77)

DC Power
03/07/03 9-5
ISLAND CARD READER
+5 VDC Measurement
1. Unlock, unscrew, and lower the face of the island card reader.
2. Measure the +5 VDC between the top of the resistor R7
(+) and the case of crystal Y1 (-). The voltage should be
+5.00 to +5.10 VDC. If the voltage does not fall within
this range, adjustment is necessary. Follow the steps
below to adjust the supply. If the voltage is within
tolerance, skip to Step 14.
+5 VDC Adjustment
3. Turn off the AC POWER switch in the island card reader.
4. Remove the two white connectors on the power supply labeled DC OUT and AC IN.
5. Remove the four 5/32 nuts on each corner of the power supply, and remove the supply.
6. Being careful that it does not touch any of the circuits on the front door, lay the power supply
on a non-conductive surface (such as heavy plastic or cardboard).
7. Reconnect the two connectors on the power supply labeled DC OUT and AC IN.
8. Attach the meter probes to R7 and Y1 on the CPU PCB.
9. Turn the AC POWER switch back on.
CAUTION
Be careful not to touch anything but the adjustment screw. High voltage exists at
various points on the supply and the circuit mounted on the rear of the supply.
10. Using a 1/8 inch or smaller plastic, flat blade screwdriver, adjust the power supply to +5 VDC
by turning the screw clockwise to increase voltage, counterclockwise to decrease voltage.
Turn the screw slightly to judge how sensitive the adjustment is.
11. Disconnect the meter probes.
12. Turn the AC POWER switch off and return the power supply to its normal location. Fasten
the nuts holding the supply.
13. Turn the AC POWER switch back on.
+12 VDC Measurement
14. Measure the +12 VDC between the red (+) and black (-) wires
on the DC OUTPUT connector of the power supply. The
voltage should be +11.00 to +14.00 VDC.
NOTE: This voltage is used only for receipt printers and is
not adjustable.
15. Close and lock the unit, and replace the screws on the face.