Yamaha RX-V675 Service Manual page 35

2-4. When the protection function worked due to excessive heatsink temperature.
T M P P R T : x x x L
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 as backup data.
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 "P2. PROTECTION HISTORY" menu.
H: Displayed when the voltage is HIGHER than upper limit
L: Displayed when the voltage is LOWER than lower limit
xxx: A/D conversion value of voltage at the moment when the protection function worked
(Reference voltage: 3.3 V=255)
RX-V675/HTR-6066/RX-A730/TSR-6750
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