VSX-917V-K
134
1
2
3
4
1
2
3
4
C
D
F
A
B
E
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 + AUTO SURR/DIRECT 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.
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.
(*1)
4. Fan stop detection operation flow in the XPROTECT detection
If the fan is forcibly stopped or become out of order, the 'XPROTECT' port becomes "L". Then an abnormality of
fan is detected.
•
Detection routine and recovery is same as "3. XPROTECT detection".
