
5-30 Controller Cards
UM4.6:CS6003 Original — December 1991
Step 6: Connect the voltmeter between the heatsink (cathode) of
diode CR3 and the common (COM) test jack on the front of
the controller power conversion card. The voltmeter should
read 4.85
± 0.015 volts dc. If not, adjust the 5 VOLT (R53)
potentiometer on the controller power conversion card to
obtain the proper reading.
Step 7: Adjust the LOGIC RESET (R47) potentiometer on the
controller power conversion card until the RESET TEST
indicator on the calibrator lights and then back off the
potentiometer until the indicator just goes out.
Note
The ON indicator on the controller power
conversion card and the RELAY TEST indicator
on the calibrator should follow the RESET TEST
indicator during these steps.
Step 8: Adjust the 5 VOLT (R53) potentiometer on the controller
power conversion card until the voltmeter reads between 4.99
and 5.10 volts dc. The RESET TEST indicator should light. If
not, the controller power conversion card requires repair.
Step 9: Adjust the 5 VOLT (R53) potentiometer on the controller
power conversion card until the RESET TEST indicator just
goes out. The voltmeter should read 4.850
± 0.015 volts dc. If
not, repeat Steps 6 thru 9 until the proper reading is obtained.
Step 10: Adjust the 5 VOLT (R53) potentiometer on the controller
power conversion card until the voltmeter reads 5.180
± 0.005
volts dc.
Step 11: Connect the voltmeter between pin 41 (fifth pin from the
bottom on the component side of the card) on the backedge
connector of the controller power conversion card and the
common (COM) test jack on the front of the controller power
conversion card. The voltmeter should read –28.00
± 0.05
volts dc. If not, adjust the –28 VOLT (R29) potentiometer on
the controller power conversion card to obtain the proper
reading.
Step 12: Disconnect the voltmeter and jumper. The ON indicator on the
controller power conversion card and the RESET TEST and
RELAY TEST indicators on the calibrator should be lit. If not,
the controller power conversion card requires repair.
The output voltage levels are now calibrated. The remaining
steps set the alarm trip points.
5
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