5–5Part Replacement Procedures
Publication 1336 IMPACT-6.8 – November, 2002
!
ATTENTION: Disconnect and lock out power from
the drive before disassembling the drive. Failure to
disconnect power may result in death or serious injury.
Verify zero bus voltage by measuring the voltage
between the Negative Capacitor Bus and both ends of
all three bus fuses. An open fuse does not show voltage
across both ends of the fuse. Failure to measure voltage
at both ends of the fuses may result in death or serious
injury. Refer to Figure 3.5. Do not attempt to service the
drive until the bus voltage has discharged to zero volts.
Important: Before you remove connections and wires from the
drive components, mark the connections and wires to
correspond with their component connections and
terminals to prevent incorrect wiring during assembly.
2. Remove all wires from Terminal Strip TB3.
3. Loosen the two captive screws fastening the L Option Board to
the Control Board.
4. Grip the right and left sides of the L Option Board and pull the
board straight out from the Control Board.
Installation
Install the L Option Board in reverse order of removal.
!
ATTENTION: Replace all guards before applying
power to the drive. Failure to replace guards may result
in death or serious injury.
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