Yamaha RX-V681 Service Manual page 34

RX-V681/RX-A760
● Starting Self-Diagnostic Function
While pressing the "TONE CONTROL" and "INFO" keys, press the "MAIN ZONE z" key to turn on the power, and release
those 2 keys.
The self-diagnostic function mode is activated.
● Starting Self-Diagnostic Function in the protection cancel mode
If the protection function works and causes hindrance to troubleshooting, cancel the protection function by the procedure
below, and it will be possible to enter the self-diagnostic function mode. (The protection functions other than the excess
current detect function will be disabled.)
While pressing the "TONE CONTROL" and "INFO" keys, press the "MAIN ZONE z" key to turn on the power and keep
pressing those 2 keys and "MAIN ZONE z" key for 3 seconds or longer.
The self-diagnostic function mode is activated with the protection functions disabled.
In this mode, the "SLEEP" segment of the FL display flashes to indicate that the mode is self-diagnostic function mode with
the protection functions disabled.
CAUTION!
Using this unit with the protection function disabled may cause further damage to this unit. Take special care for this point
when using this mode.
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Keys of this unit
RX-V681
RX-A760
While pressing these keys, turn on the power.
While pressing these keys, turn on the power.