3–14 Disassembly and Access Procedures
Publication 1336 IMPACT-6.2 – March 1998
!
ATTENTION: Wear a wrist-type grounding strap
when servicing 1336 IMPACT drives. Failure to
protect drive components against ESD may damage
drive components. Refer to Electrostatic Discharge
Precautions at the beginning of this chapter.
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.
1. Remove power from the drive.
2. Open the Enclosure. Refer to Opening the Drive Enclosure in this
chapter.
3. Check for zero volts at TB1 terminals +DC and –DC.
4. Check for absence of control voltage at:
• TB10 and TB11
• L Option Board (if used)
5. Disconnect the following from the Precharge Board:
• J1 connector
• J2 connector
• J3 connector
• J4 connector
6. Remove the nuts and brackets fastening the sides of the Precharge
Board to the drive.
Installation
Install the Precharge Board in reverse order of removal.
!
ATTENTION: When removing the entire wire
harness connecting Gate Driver Board connector J9 to
Precharge Board connector J3, align the wires on the
harness terminals with the pins on the board
connectors. Incorrect harness connection may result in
faulty drive operation and may damage the equipment.
!
ATTENTION: Replace all guards and insulators
before applying power to the drive. Failure to replace
guards may result in death or serious injury.
AB Spares
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