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© 2018 Sensata Technologies
Control Board Removal and Replacement
3.0
Removing & Replacing ME/RD Series
Control
Boards
This section provides information on removing and
replacing the control board in a ME or RD Series inverter.
If you are replacing a control board in a MS or MS-PAE
Series inverter, proceed to Section 4.0.
3.1
Removing ME/RD Series Control Boards
1. Remove the inverter’s top cover and review the
internal components as described in the
Top Cover
Removal and Replacement with Internal Component
Identifi cation,
Service Instructions: 64-1001
.
2. Locate the ME/RD Series control board in the
inverter (Figure 6, Item A), and then remove the
two #6-32 screws securing it to the inverter base.
See Figure 3, Item B.
2. Insert the new control board into the bottom 16-
pin connector located on the FET board. Ensure the
connector pins are aligned correctly before pushing in.
3. Replace the two #6-32 screws (T15 head) to
secure the new control board to the FET board.
See Figure 3, Item B.
4. The new control board is now installed, review all the
connections a
fi
nal time and ensure they are correct.
5. If there are no other internal components to replace,
reinstall the top cover as described in the
Top Cover
Removal and Replacement with Internal Component
Identifi cation, Service Instructions: 64-1001
.
4.0
Removing & Replacing MS/MS-PAE
Series Control Boards
4.1
Removing the MS/MS-PAE Series Control
Board
1. Remove the inverter’s top cover and review the
inverter’s internal components as described in the
Top Cover Removal and Replacement with Internal
Component Identifi
cation, Service Instructions:
64-1001
.
2. Locate the MS/MS-PAE Series control board (Figure
7, Item A) in the inverter. Verify that it has a blue
DC current transducer (referred to hereafter as the
“LEM”) on the back. See Figure 7, Item C.
Note: The MS Series inverter was made with two types
of control boards; the earlier “non-LEM” type and the
current “LEM” type. This document provides instructions
only on replacing the LEM type control board. If repairing
a MS Series inverter that does not have a LEM type
control board, contact Sensata for assistance.
3. Locate and remove the two #6-32 screws (T15 head)
securing the control board. See Figure 3, Item B.
4. Firmly pull up on the control board by its top edge (or
upper corners) to remove it from the bottom 16-pin
connector on the FET board. The current sense wire
(Figure 7, Item B) will still be attached through the
LEM on the back.
5. Look on the front of the control board and pull on
the 16-pin ribbon connector to remove. See Figure 3,
Item A.
6. Move the control board aside to provide access to the
¼-20 bolt (7/16” head) screwed into the negative FET
busbar—see Figure 7, Item F. Remove this ¼-20 bolt,
and at the same time use a pair of pliers to hold the
negative FET busbar in place. This will prevent the
busbar from twisting while this bolt is being removed.
See Figure 4.
Note: Record how this hardware is removed, it will need
to be reconnected in the same way.
7. After removing the bolt, pull the loose side of the
current sense wire (Figure 7, Item B) out of the LEM.
8. The control board is now removed. Using ESD
precautions, place this control board aside until it can
be placed in an antistatic bag to be returned with any
other replaced components.
Figure 3, Top View of the Control Board
3. Grasp the control board by its top edge
(or upper corners) and
fi
rmly pull up to remove it from
the bottom 16-pin FET board connector.
4. Locate and pull off the 16-pin ribbon connector. See
Figure 3, Item A.
5. The control board is now removed. Using ESD
precautions, place it component-side up on a
grounded, static-free surface until it can be placed
in an antistatic bag to be returned with any other
replaced components.
3.2
Replacing ME/RD Series Control Boards
Note:
If the FET board also needs to be replaced, follow the
information described in either the
Small FET Board Removal
and Replacement, Service Instructions: 64-1004
; or the
Large
FET Board Removal and Replacement, Service Instructions:
64-1005
; depending on your particular FET board—before
replacing the control board.
1. Remove the new control board from its antistatic
bag, and then reconnect the 16–pin ribbon cable
connector. Before pushing in the connector,
ensure it is seated with the red stripe on the
ribbon cable facing toward the rear of the inverter
(Figure 3, Item A) and the connector pins are aligned
correctly.
Two #6-32 screws (T15 head)
B
16-pin Ribbon Connector
(note red stripe toward rear of unit)
A
