3–16 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. Remove the Main Control Board Mounting Plate. Refer to
Removing the Main Control Board Mounting Plate in this
chapter.
6. Disconnect the following from the Gate Driver Board:
• J9 Precharge Board connector
• J10 Bus Capacitor Bank connector
• J2 Ground Sense CT connector
• J7 Transistor Module connector
• J8 Transistor Module connector
• J6 Snubber Board connector
• TB6 Fan connector
7. Remove the screws, fastening the Gate Driver Board to the drive
to remove the board from the drive.
Installation
Install the Gate Driver Board in reverse order of removal. Refer to
Table 3.A – Fastener Torque Specifications.
!
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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