
6-3Data Highway Cards
Original — December 1991 UM4.6:CS6003
Step 13: Adjust the +15 VOLT (R31) potentiometer on the power
converter card until the voltmeter reads 15.550
± 0.050 volts
dc.
Step 14: Connect the voltmeter between the –12V and COM test jacks
on the front of the power converter card. The voltmeter should
read –12.000
± 0.400 volts dc. If not, the power converter
card requires repair.
Step 15: Connect the voltmeter between the –30V and COM test jacks
on the front of the power converter card. The voltmeter should
read between –28.900 and –30.000 volts dc. If not, the power
converter card requires repair.
Step 16: Disconnect the voltmeter.
Step 17: Set the calibrator ON/OFF switch to OFF.
Step 18: If a failure occurred in Step 7 continue the procedure. If not,
remove the power converter card from the calibrator.
Step 19: Using two eight inch jumpers, connect a 10 to 39K resistor
across R1 on the power converter card.
Step 20: Set the calibrator ON/OFF switch to ON.
Step 21: Connect a voltmeter between the +5V and COM test jacks on
the power converter card.
Step 22: Adjust the +5V (R29) potentiometer on the power converter
card to read 4.855
± 0.002 volts dc.
Step 23: Adjust the LOGIC RESET (R49) on the power converter card
until the ON indicator on the power converter card and the
RESET TEST and RELAY TEST indicators on the calibrator
just go out.
Step 24: Adjust the +5V (R29) on the power converter card until the
voltmeter reads at least 4.910 volts dc and the ON indicator
on the power converter card and the RESET TEST and
RELAY TEST indicators on the calibrator light.
Step 25: Adjust the +5V (R29) on the power converter card until the
ON indicator on the power converter card and the RESET
TEST and RELAY TEST indicators on the calibrator just go
out. The voltmeter should read 4.855
± 0.005 volts dc. If not,
repeat Steps 22 thru 25 to obtain the proper reading.
Step 26: Set the calibrator ON/OFF switch to OFF.
Step 27: Remove the jumpers and resistor across R1.
Step 28: Set the calibrator ON/OFF switch to ON.
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