Instructions
1336 PLUS, PLUS II, FORCE & IMPACT
Common Bus Precharge Board Replacement
Frames C - H
This publication will guide you in replacing the Common Bus Precharge Board in
1336 PLUS, PLUS II, FORCE and IMPACT Drives.
!
!
Board Removal
ATTENTION: This drive contains ESD (Electrostatic Discharge)
sensitive parts and assemblies. Static control precautions are required
when installing, testing, servicing or repairing this assembly.
Component damage may result if ESD control procedures are not
followed. If you are not familiar with static control procedures,
reference A-B publication 8000-4.5.2, “Guarding Against Electrostatic
Damage” or any other applicable ESD protection handbook.
ATTENTION: To avoid a shock hazard, assure that all power to the
drive has been removed before proceeding. In addition, verify that the
DC bus has discharged by measuring across the “+DC” and “–DC”
terminals of TB1 with a voltmeter. The voltage should be 0.0VDC.
Refer to Figure 1 for component locations.
Important: Label all connections and wires going to the Precharge Board to guard
against incorrect wiring during re-assembly.
1. Remove power from the drive and open the enclosure (if equipped).
2. Check for zero volts between the drive +DC and –DC terminals of TB1.
3. Use the following table to verify the absence of control voltage.
Drive
Option (if applicable)
Verify 0.0 Volts at . . .
FORCE PLC Communication Adapter Board • TB1 on the Precharge Board
• TB10 & TB11 on Main Control Board
• TB20 & TB21 on Adapter Board
Standard Adapter Board
• TB1 on the Pre-charge Board
• TB10 & TB11 on Main Control Board
• TB5, TB6 & TB7 on Adapter Board
• TB3 on L-Option Board
ControlNet Adapter Board
• TB1 on the Pre-charge Board
• TB10 & TB11 on Main Control Board
• TB20 & TB21 on Adapter Board
IMPACT
• TB1 on the Pre-charge Board
• TB10 & TB11 on Main Control Board
• TB3 on L-Option Board
PLUS/
• TB1 on the Pre-charge Board
PLUS II
• TB2 on the Main Control Board
• TB3 on the L-Option Board
4. Disconnect the following from the Precharge Board:
❏ J1 Connector
❏ J2 Connector
❏ J3 Connector
❏ TB1 Connector
1336 FORCE & 1336 IMPACT are trademarks of Rockwell Automation.
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1336 PLUS, PLUS II, FORCE & IMPACT Common Bus Precharge Board Replacement
5. On C Frame drives, remove the hardware that fastens the sides of the Precharge
Board to the drive. On D-H Frame drives, loosen the standoffs and remove the
board.
Installation
1. Install the Precharge Board in reverse order of removal.
!
ATTENTION: To guard against component and/or drive damage,
assure that the wires on the harness terminals are properly aligned
with the J3 connector pins on the board. Incorrect harness
connection may result in erratic drive operation and may damage the
equipment.
2. Verify the position of jumper W1.
Position
1 -> 2
2 -> 3
Voltage
24V DC
120V AC
3. Verify the wiring at TB1 on the Precharge Board.
Terminal
TB1-1
TB1-3
Connection
Power (+24V DC or 120V AC)
Common
4. Replace any guards and/or insulators previously removed.
Figure 1 Precharge Board Component Locations
J1
TB1
J2
W1
J3
Washer
J1
J2
W1
J3
Nut
TB1
Mounting
Brackets
C Frame Drives
Publication 1336-5.90 – April, 2000
D-H Frame Drives
Standoff - 4 Places
P/N 303713 (01)
Copyright 2000 Rockwell International Corporation. All rights reserved. Printed in USA.
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