Product manual

Maintenance and Repair
6-18
Part 1105120-01
E 2013 Nordson Corporation
Light Detector Board Replacement
1. Follow steps 1−5 under Preparation.
2. See Figure 6-23. Disconnect the temperature sensor harness, the
controller harness, and the pressure sensor hose from the light detector
board.
3. Remove the three screws and the light detector board.
4. Install and connect the new board. Note that the pressure sensor hose
must be connected to the barbed fitting labeled “B”.
Temperature Sensor
Controller Harness
Pressure Sensor
Hose Connector
Light Detector
Board
Figure 6-23 Light Detector Board Replacement (External Blower Version Shown)
Temperature Sensor Replacement
See Figure 6-23. The internal temperature sensor (thermistor) is also
replaceable separately. It consists of a two-wire harness with plug and
ring-tongue terminal. The thermistor is potted to the ring-tongue terminal.
To replace the sensor, unplug the harness from the light detector board and
remove the screw securing the ring-tongue terminal to the bracket.
Starter Bulb Replacement
1. Follow steps 1−5 under Preparation.
2. See Figure 6-24. Cut the RTV sealant at the bulb base and unscrew the
bulb.
3. Screw the new bulb into the socket. Apply a small dot of RTV sealant
between the bulb and socket. The RTV sealant keeps the bulb from
vibrating out of the socket.