Xerox PHASER 7500 - NOHAD Logic Fail

3-122 Phaser 7500 Printer Service Manual
Error Messages and Codes
NOHAD Logic Fail
A fatal error was detected in Noise Ozone Heat Altitude Dust (NOHAD) control.
Applicable Chain-Link Code
• 042-337: NOHAD Logic Fail
Initial Actions
• Power cycle the printer.
• If the problem persists, follow the procedure below.
1. Turn the power Off and On.
2. Replace the MCU PWB (REP 18.12, page 8-202).
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ MCU PWB, PL18.3.6