Pioneer VSX-516-K Service Manual page 112

1
3. XPROTECT detection
XPROTECT is started to be monitored 200msec after power on.
A
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.
When 200 msec passed after power on,
the XPROTECT detection starts.
Don't detect it during power off.
B
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.
Power key not effective (*1)
C
Power key become effective.
(*1) 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)
D
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.
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.
When an abnormality of fan is detected,
A.MUTE* is turned on, speaker relay is turned off,
the "AMP_ERR" flashes on the display.
E
The abnormality continues for 3 seconds.
Power key not effective.
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)
F 2 When power off, push FRONT ENTER key + ADVANCED SURROUND key continuously 2sec.
(Effective, only when power-off is carried out by DC detection)
112
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2
POWER ON
↓
↓
↓
↓
↓
↓ after 60sec
↓
↓
↓
POWER ON
↓
↓ Continues.
The power is shut off.
↓
2
3
←
When X+Y reach 60sec.
*A.MUTE : Audio mute command
The program restarts.
VSX-516-K
3
4
↓ after X sec
AC OFF
↓
AC ON
↓ after Y sec
↓ Recovery
4