EWT G20 Owner's Manual page 30

REPLACE CIRCUIT BOARD
4 X Screws
1. Follow steps 1 to 3 of timer /Powerhead replacement.
2. Remove all the connections on PCB.
3. Remove the four screws from the PCB.
4. Replace the PCB.
REPLACE DISPLAY
1. Unplug electrical cord from outlet.
2. Remove the cover assy and disconnect
the wire connection.
Communication
wire conncetions
3. Remove the four screws attached
on display back cover.
4. Remove the display back cover.
PCB
1 X Display Back
Cover
4 X Screws
5. Remove the four screws attached
on display PCB.
6. Remove the display PCB.
1 X Display PCB
4 X Screws