NEC PA903X - Page 173

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7. Maintenance
To clear the lamp usage hours:
1. Place the projector where you use it.
2. Plugthepowercordintothewalloutlet,andthenturnontheprojector.
3. Clearthelampusagehours.
From the menu, select [RESET] → [CLEAR LAMP HOURS] and reset the lamp usage hours. (→ page 134)