As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, AN ELECTRICAL BURNING SMELL EMITTED IN THE COCKPIT. AIRCRAFT DIVERTED TO NRT AND LANDED WITHOUT INCIDENT. REPLACED THE R1 WINDOW HEAT CONTROLLER, R1 WINDOW, APU BATTERY CHARGER, AND CLEANED AN INSTRUMENT COOLING DUCT. OPERATIONAL CHECK GOOD.