5–12 Part Replacement 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. Check for zero volts at TB1 terminals +DC and –DC.
3. Check for absence of control voltage at:
• TB10
• TB11
• L Option Board (if used)
4. Remove the Snubber Board from the drive. Refer to
Chapter 3 – Disassembly and Access Procedures, Removing the
Snubber Board.
5. Remove all wires connected to the Power Module terminals.
6. Remove the screws fastening the Power Module to the heat sink.
Installation
1. Clean all surfaces between the Power Module and the heat sink
using a soft, clean cloth.
2. Replace the Preform between the Power Module and the heat
sink.
3. Install the Power Module 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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