Gasboy Site Controller III Start-Up - Manual (Page 74)

DC Power Measurement and Adjustment
Page 62 MDE-4375 CFN Series Site Controller III Start-Up Manual · June 2005
5 Measure the +12 VDC between the red (+) and black (-) wires ( Figure 9-1 ).
The voltage should be +11.50 to +15.50 VDC depending on the type and number of pulsers
and the number of relays energized.
6 Measure the POWER FAIL between the yellow (+) and black (-) wires ( Figure 9-1 ).
The voltage should be +4.75 to +5.05 VDC.
Note: There are no adjustments for these voltages.
7 Turn off the AC and DC power switches.
8 Replace the black plastic cover on the connector and turn the AC and DC power switches back
on.
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 (-)
(
Figure 9-2 ).
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 in
+5 VDC Adjustment below to adjust the supply.
• If the voltage is within tolerance, skip to “+12 VDC Measurement” on page 63 .
Figure 9-2: ICR +5 VDC Measurement Point
+5 VDC Adjustment
1 Turn off the AC POWER switch in the island card reader.
2 Remove the two white connectors on the power supply labeled DC OUT and AC IN.
3 Remove the four 5/32-inch nuts on each corner of the power supply, and remove the supply.
4 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).