– 31 –
Troubleshooting
1. If Buzzer and Backlight Operating Voltage is
missing, go to step 4.
2. If Relay Operating Voltage is missing, go to
step 7.
3. If VFD Operating Voltage is missing, go to
step 10.
4. Pivot the Control Panel Assembly out from the
oven. (See
Control Panel Removal
.)
5. To gain better access to components, remove
the wires that plug into the large relays on the
Relay Board.
(See
Relay Board
.)
Cut the wire tie
that the Smart Board CN103 wire harness (See
Smart Board
.) is routed through.
6. Check voltage at Smart Board CN103 pins 2 and 5.
• If 12 VDC is present, replace Smart Board.
• If 12 VDC is not present, see
Power Supply
Board
, troubleshooting step 3.
7. Pivot the Control Panel Assembly out from the
oven. (See
Control Panel Removal
.)
8. To gain better access to components, remove
the wires that plug into the large relays on the
Relay Board
and cut the wire tie that the Smart
Board CN103 wire harness is routed through.
9. Check voltage at Smart Board CN103 pins 3 and 5.
• If 12 VDC is present, replace Smart Board.
• If 12 VDC is not present, see
Power Supply
Board
,
troubleshooting step 3.
10. Pivot the Control Panel Assembly out from the
oven. (See
Control Panel Removal
.)
11. To gain better access to components, remove
the wires that plug into the large relays on the
Relay Board.
(See
Relay Board
.)
Cut the wire tie
that the Smart Board CN103 wire harness (See
Smart Board
.) is routed through.
12. Check voltage at Smart Board CN103 pins 4 and 5.
• If 5 VDC is present, replace Smart Board.
• If 5 VDC is not present, see
Power Supply
Board
,
troubleshooting step 3.
Board Spacer
Retainer
Retainer
Disconnect
Disconnect
Disconnect
Smart Board
Disassembly
To remove the Smart Board:
1. Disconnect power to the oven.
2. Remove the Control Panel Assembly.
(See
Control Panel Removal
.)
3. Remove the Relay Board.
(See
Relay Board Removal
.)
4. Disconnect wire harnesses at CN102, CN15, and
CN10.
5. Remove the 2 Phillips-head screws from the
bottom of the Smart Board.
6. Lift and remove the Smart Board from the top 2
retainers.
Note:
When replacing the Smart Board, transfer the
board spacer to the replacement board.