Technical data

5.3 104, Close Left Cover (Exit Door)
• If the sensor circuit fails to work, do the following:
1. Inspect 2-pin plug connecting the sensor to PJ57 on the driver board.
Pin-1 toggles high (5Vdc) when the door opens and toggles low (ground)
when the door closes.
2. Inspect the 19-pin plugs that connect P56 of the driver board to P57 of
the DC control board. The door open signal can be measured on pin-14
of that cable.
3. Swap the sensor.
4. Swap the driver board.
5. Swap the DC control board.
Figure 5–4 104 Error Code
P/J 47
P/J 47 P/J 56
Driver
Board
P/J 56 P/J 57
DC Control
Board
0102
+5 VDC
14
2
1
0104
14
2
1
P/J 57
Left
Door
2
1
Sensor
DOOR CLOSED (L) +5VDC
MLO-006640
5–8 Display Error Code FIPs