Specifications

Maintenance and Troubleshooting
ADDvantage-32 PLUS ● AC to DC Power Converter
7-33
7.8 THYRISTOR/DIODE REPLACEMENT (510 ADC and Below)
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W A R N I N G
HAZARDOUS VOLTAGES WHICH CAN CAUSE SEVERE
INJURY OR DEATH ARE PRESENT DURING THE
OPERATION OF THIS EQUIPMENT. TURN OFF AND
LOCK OUT ALL SOURCES OF POWER BEFORE
MAKING ANY REPAIRS.
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TABLE 7-5. SPECIAL TOOLS REQUIRED
QTY. DESCRIPTION
USED ON
DRIVE SIZES
1 1/4" Drive Torque Wrench (0-75 in-lb) ALL
1 5/32" Hex Head Socket with Allen wrench insert bit (1/4" drive) ALL
1 Hex Head Socket with #2 Phillips screwdriver insert bit
(1/4" drive)
DC0010, DC0030,
DC0056, DC0110
1 Hex Head Socket with #3 Phillips screwdriver insert bit
(1/4" drive)
DC0180, DC0280,
DC0360, DC0510
1 1/2" Hex Head Socket (1/4" drive) DC0280, DC0360,
DC0510
1 Thermally Conductive Compound (Avtron P/N 950010) ALL
1 #2 Phillips screwdriver ALL
7.8.1 REPLACING THE POWER THYRISTOR (CR1-6), FIELD THYRISTOR (CR7), AND
FIELD DIODE (CR8)
7.8.1.1 Disassembly
1. Remove all sources of power from the unit.
2. Remove microprocessor board per section 7.4, steps 1 through 7.
3. Remove bridge interface board per section 7.4, steps 8 through 11.
4. Remove the twisted pairs of wires from gate leads of thyristor to be
replaced.