3–10 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 Cover. 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
• TB11
• L Option Board (if used)
5. Disconnect the following from the Main Control Board:
• J1 connector
• J5 ribbon cable connector
• J7 connector
• Ground wires from terminal strip TE
• Chassis ground wire at the top-right corner of the Main
Control Board Mounting Plate
6. Loosen the two captive screws near the bottom of the Main
Control Board.
7. Pull the Main Control Board Mounting Plate out about two
inches, then slide it downward.
Installation
Install the Main Control Board Mounting Plate in reverse order of
removal.
!
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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