Protection Circuit - Pioneer VSX-D412-K Service Manual

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7.1.3 PROTECTION CIRCUIT

1. DC-abnormality detection
In the case of simultaneous detection with the overload protection circuit,
DC-abnormality detection is performed preferentially to overload detection.
When a DC abnormality is detected, A.MUTE* is turned
on, speaker relay is turned off, then
"AMP_ERR" flashes on the display.
The abnormality continues for 3 seconds.
The power is shut off.
The power key is disabled for 60 seconds.
If the AC power cord is unplugged within 60 seconds after the power is shut off then plugged
in again, the unit will be reset in 60 seconds.
2. Overload detection
When an overload is detected, A.MUTE* is turned on,
speaker relay is turned off, then
"OVERLOAD" flashes on the display.
The abnormality continues for 3 seconds.
The power is shut off.
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↓
↓ Continues.
↓
↓
↓ Continues.
VSX-D412-K
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*A.MUTE : Audio mute command
↓ Recovery
The program restarts.
↓ Recovery
The power is shut off even if the
unit recovers.
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A
B
C
D
E
F
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