Yamaha HTY-760 Service Manual page 35

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Cause: Amplifier IC is abnormal.
Turning on the power without correcting the cause will
trigger the protection function to work 2 second later to
shut off the power supply.
Cause: Control section is abnormal.
If there is an abnormality between the microprocessor and
DSP, the protection function works 25 seconds later and
the power is turned off.
• History of protection function
When the protection function has worked, its history is
stored in memory with a backup. Even if no abnormal-
ity is noted while servicing the unit, an abnormality
which has occurred previously can be defined as long
as the backup data has been stored.
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L 13942296513
The history of the protection function is cleared when
self-diagnostic function is cancelled by selecting PRE-
SET RESERVED (Memory initialized) of main menu
No. 8 or when the backup data is erased.
* To clear the protection history only, use the sub-
menu No. 6 "PROTECT Hist (PrHist <- RESET) of
main menu No. 20".
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