Protection Circuit - Pioneer VSX-C402-S Service Manual

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7.1.2 Protection Circuit

DC detection
Detection method
A
Detection start time
Process
Display
Recovery
Remarks
B
Overload detection
Detection method
Detection start time
Process
Display
Recovery
C
Remarks
Fan (temperature) and short-circuit of the power supply circuit
Detection method
Detection start time
Process
D
Display
Recovery
Remarks
Fan stop
Detection method
E
Detection start time
Process
Display
Recovery
Remarks
F
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XPROTECT port
(A/D)R397: 56 K-ohms
Less than 0.6-0.8 Vdd
2.8 sec after
Mute: On
Speaker Relay: Off
Shifting to STBY after 3 sec
"AMP ERR" flashes for 3 sec
Hold the STANDBY key pressed for 10 sec.
The unit will recover if the duration of detection is 3 sec or less.
XPROTECT port
(A/D)R363: 27 K-ohms
0.4-0.6 Vdd
2.8 sec after
Mute: On
Speaker Relay: Off
Shifting to STBY after 3 sec
"OVERLOAD" flashes for 3 sec
Press the STANDBY key.
XPROTECT port (A/D)
0.4 Vdd or less
1.0 sec after
Mute: On
Speaker Relay: Off
Shifting to STBY
No display
Hold the STANDBY key pressed for 10 sec.
XPROTECT port (A/D)
0.4 Vdd or less
1.0 sec after
Mute: On
Speaker Relay: Off
Shifting to STBY
No display
Hold the STANDBY key pressed for 10 sec.
VSX-C402-S
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