VSX-516-K
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4. Fan stop detection operation flow in the DC abnormality detection
If the fan is forcibly stopped, the 'DC PROT' port becomes "L". Then an abnormality of fan is detected.
*
A.MUTE : Audio mute command
↓
The abnormality continues for 3 seconds.
↓
Continues.
↓
Recovery
The power is shut off.
The program restarts.
↓
However, when the following keys are pushed so that the key input of a line and the service can be carried out,
power can be on.
1
TESTMODE ON (A55F+A55F)
2
When power off, push FRONT ENTER key + ADVANCED SURROUND key continuously 2sec.
(Effective, only when power-off is carried out by DC detection)
However, when the following keys are pushed so that the key input of a line and the service can be carried out,
power can be on.
1
TESTMODE ON (A55F+A55F)
2
When power off, push FRONT ENTER key + ADVANCED SURROUND key continuously 2sec.
(Effective, only when power-off is carried out by DC detection / XPROTECT detection)
Any other key input from front panel or remote control will not be detected.
When an abnormality of fan is detected,
A.MUTE
*
is turned on, speaker relay is turned off,
the "AMP_ERR" flashes on the display.
XPROTECT is started to be monitored 200msec after power on.
XPROTECT port is checked every 20msec.
If Low level (ERROR) is recognized during consecutive 9 times, micon judge it as XPROTECT ERROR.
It processes more preferentially than DC abnormal detection and overload detection.
3. XPROTECT detection
↓
↓
↓
↓
↓
←
Power key not effective (*1)
↓
after 60sec
↓
after X sec
Power key become effective.
AC OFF
If micon detect XPROTECT = Low
for 200 msec, it judge as error,
and then AMUTE on, speaker relay off
and shut down power supply immediately.
↓
When 200 msec passed after power on,
the XPROTECT detection starts.
Don't detect it during power off.
↓
POWER ON
↓
POWER ON
↓
AC ON
↓
after Y sec
When X+Y reach 60sec.
Power key not effective.
(*1)
