GE Industrial Solutions ASTAT-CD Plus Solid-State Starters - Manual (Page 25)

ASTAT-CD Plus Service Instructions
25
Step 9. Replace the terminal connectors through the
plastic cover, onto the connector strips. Make
certain that the terminal connectors snap into
place (Figure 2).
Step 10. Replace the front steel cover using the 4
Phillips screws (Figure 1).
To replace Power Supply Board.
NOTE: POWER MUST BE REMOVED
BEFORE SERVICING
Step 11. Remove the cover and Logic Board using
steps 1-6. The Power Supply Board location is
shown in Figure 4. It has gray and orange
transformers visible from the sides.
Figure 4. Removing Logic Board
Screw
Figure 5. Removing screws holding
Power Supply Board
Step 12. Remove the 4 screws holding the Power
Supply Board to the black plastic housing.
Step 13. If a yellow/green ground wire is connected to
the bottom of the Power Supply Board, it
must be disconnected. Lower the top of the
Power Supply Board to view the yellow and
blue gate leads to the SCRs (Figure 6).
NOTE: Check the blue and yellow gate wires
for a number marking before removing these
wires. Each gate wire must have a number
marking correlating to the terminal numbers
on the Power Supply Board (1 through 12) to
facilitate reassembly.
Step 14. Remove the blue and yellow gate wires from
the small 4-point gate Terminal Boards, 1 on
the component side and 2 on the solder side
of the Power Supply Board, with a small
screwdriver (Figure 6).
Protection Board Gate leads
Bottom of Power Supply Board Gate terminal board
Figure 6. Gate leads, Protection and Power
Supply Boards
These wires must be reconnected to the new
Power Supply Board at the proper numbered
terminals for proper operation of the starter.
Remove the Power Supply Board. Remove
the hex standoffs, nuts and washers from the
Power Supply Board for use on the
replacement board.