Pioneer VSX-816-S Service Manual - Page 130

Fan stop detection operation flow in the DC abnormality detection, XPROTECT detection

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1 2 3 4 3. XPROTECT detection A 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. POWER ON ↓ 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 and POWER LED blinks (*1) ↓ ↓ after X sec ↓ AC OFF ↓ after 60sec C ↓ ↓ ↓ AC ON ↓ after Y sec Power key become effective. ← POWER LED continue to blink. When X+Y reach 60sec. ↓ POWER ON Then no more POWER LED blinks. (*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. D 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. 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. *A.MUTE : Audio mute command E ↓ The abnormality continues for 3 seconds. ↓ Continues. The power is shut off. ↓ Recovery The program restarts. ↓ Power key not effective and POWER LED blinks. 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) 130 VSX-816-K 1 2 3 4

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VSX-816-K
130
1
2
3
4
1
2
3
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C
D
F
A
B
E
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 and POWER LED blinks (*1)
↓
after 60sec
↓
after X sec
Power key become effective.
POWER LED continue to blink.
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
Then no more POWER LED blinks.
↓
AC ON
↓
after Y sec
When X+Y reach 60sec.
Power key not effective and POWER LED blinks.
(*1)