Disassembly and Reassembly
16 - 35
Line Frequency Conversion
The Power Drive Circuit in the Mark V ProVis Injector is sensitive to
line frequency. When manufactured, the injector is calibrated for either
50 or 60 Hz; marked on a tag on the Power Drive Card, and the sys
-
tem serial number tag on the Control Unit. If the injector is to be used
at a line frequency other than as marked, adjustment can be made for
proper operation through the following instructions.
Conversion
Procedure
NOTE: Disregard any messages that may appear in the
SENTINEL throughout this adjustment process.
1. Remove power from the injector, then disconnect from the power
source.
2. Access the PC cards inside the electronics console. Refer to the
disassembly and reassembly procedures outlined in this section
as required.
3. Remove the ISI Card. Position the 50/60 Hz switch on the ISI Card
at the line frequency supplied to the injector. Reinstall the ISI
Card.
4. Remove the Power Drive Card, then install the card extender
between the Power Drive Card and the mating connector in the
chassis. Reconnect the cables on the connector plate.
5. Disconnect the white/red AC wires from the SCR bridge, located
on the Power Drive Relay Card. Tape or otherwise insulate these
wires to avoid an accident.
6. Apply power to the injector.
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