NEC NP-NC900C-A Service Manual page 14

System Monitoring Processes
System Safety Monitoring
Thermal Management
Lamp Interlock Detection
Lamp Door Detection
Notch Filter Detection
Lamp Thermostat Detection
Reserve
Reserve
Reserve
Other Possible Failure:
"Confidential, Do Not Duplicate without written authorization from NEC."
TROUBLESHOOTING
- Extended GPIO control failure
- Lamp init failure
- Lamp ignition failure
- Ballast communication failure
- Fan init failure (may caused by I2C
bus issue)
- I2C communication failure
FAN Control
Thermal Monitoring
4-4
Slave MCU will assert the
ALERT signal to inform
Master if has any failure
be detected.