GE Industrial Solutions ASTAT-CD Plus Solid-State Starters - Manual (Page 8)

ASTAT-CD Plus Service Instructions
8
Step 10. 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.
Protection
Board
Gate leads
Gate Terminal
Board
Bottom of Power
Supply Board
Figure 6. Gate leads, Protection and Power
Supply Boards
Step 11. 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. 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.
Remove gate leads Protection Board
Gate leads Power Supply & Logic Board assembly
Figure 7. Board location
Replace the terminal connectors through the
plastic cover, onto the connector strips. Make
certain that the terminal connectors snap into
place.
To replace Power Supply Board
NOTE: POWER MUST BE REMOVED
BEFORE SERVICING.
The Power Supply Board location is shown
below (Figure 4). It has gray and orange
transformers visible from the sides.
Step 8 Remove the cover and Logic Board using
Steps 1 - 5.
Power Supply Board Ribbon cable
Control housing
Figure 4. Removing Logic Board
Step 9. Remove the 4 screws holding the Power
Supply Board to the black plastic housing
(Figure 5).
Screws to
remove
Figure 5. Removing screws holding
Power Supply Board