When The Protection Function Worked Due To Abnormal Dc Output - Yamaha HTR-3064 Service Manual

2-2. When the protection function worked due to a short between speaker terminals.
Cause: The line between speaker terminals is shorted.
Supplementary information: As the excess current is detected after operation of the speaker relay, the shorted speaker
terminal and the connected speaker can be identified.
Turning on the power without correcting the abnormality will cause the protection function to work immediately and the
power supply will instantly be shut off.

2-3. When the protection function worked due to abnormal DC output.

Cause: DC output of the power amplifier is abnormal.
Supplementary information: The protection function worked due to a DC voltage appearing at the speaker terminal. A
cause could be a defect in the amplifier.
Turning on the power without correcting the abnormality will cause the protection function to work in 3 seconds and the
power supply will be shut off.
2-4. When the protection function worked due to abnormal voltage in the power supply section.
Cause: The voltage in the power supply section is abnormal.
Supplementary information: The protection function worked due to a defect or overload in the power supply.
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.
I P R O T E C T
D C P R T : x x x H
AD value when the protection function is working
P R V P R T : x x x L
AD value when the protection function is working
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