History Of Protection Function - Yamaha RX-V767 Service Manual

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2-4. When the protection function worked due to
excessive heatsink temperature.
Cause: The temperature of the heatsink is excessive.
Supplementary information: The protection function
worked due to the temperature limit being exceeded.
Causes could be poor ventilation or a defect related to
the thermal sensor.
Turning on the power without correcting the abnormality
will cause the protection function to work in 1 seconds
and the power supply will be shut off.
● History of protection function
When the protection function has worked, its history
is stored in memory with a backup.
Even if no abnormality is noted while servicing the
unit, an abnormality which has occurred previously
can be defined as long as the backup data has been
stored.
For details, refer to main menu P2 PROTECTION
HISTORY.
2-4.  ヒートシンクの異常温度によりプロテクション
が働いた場合
T M P   P R T : x x x L
AD conversion value when the protection function is working
プロテクションが働いたときの電圧の A/D 変換値
原因:   ヒートシンクの温度が異常。
補足:   温度制限を越えた原因で、プロテクションが働い
たことを示します。
異常状態のまま電源を入れると、1 秒後にプロテクション
が働き、電源が切れます。
●  プロテクションの履歴
プロテクションが働いた場合、 その履歴をバックアッ
プして記憶しています。
修理のときに異常が認められなくても、バックアッ
プが残っていれば、お客様のところで起きた異常を
区別できます。
詳細は、メインメニュー P2 PROTECTION HISTORY を
参照してください。
RX-V767/HTR-7063/RX-A800
31

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