VSX-1015-K
112
1
2
3
4
1
2
3
4
C
D
F
A
B
E
IC4203
R4218
D4207
R4216
R4214
R4219
R4215
C4214
R4217
IC4202
D4206
IC4203
R4221
R4219
D4305
D4105
R4052
D4205
R4053
C4051
Q4051
R535
R4051
D507
C512
D506
R534
73-pin
Q4202
V+5US
IC501
R4501
C4406
Q4401
R4220
IC4202
Q4402
R4054
D509
R541
C513
74-pin
IC501
SBLch
POWER
FLch
SP
ASSY
POWER AMP_L
LSch
SBLch
POWER
FLch
AMP IN
ASSY
POWER
LSch
POWER AMP IN
ASSY
At OL Detection LOW(0V)
At Normal HIGH(5V)
MAIN u-COM
POWER AMP_R
ASSY
MAIN ASSY
ASSY
POWER AMP_R
POWER PROTECT
ASSY
At Connector falls out LOW(0V)
At DC Detection LOW(0V)
At Normal HIGH(5V)
MAIN u-COM
ASSY
POWER AMP_L
MAIN ASSY
0.18
470
4.7k
0.18
4.7k
NP
470
GNDU
D519
R533
V+5US
• DC Detection circuit
• Overload Detection circuit
L
L
V
R
V
S
Q
Q
S
Protection Process List
Item
Detection Method
Process
Warning Indication
Remarks
DC detection
Detects when the DC_PROT port
becomes "L".
Turns muting on and speaker
relay off, then turns off the
power after 3 seconds.
Flashing "AMP ERR" for 3
seconds.
If the power is turned off, flashes the MCACC
LED.
Do not accept the POWER key.
If the DC_DET port becomes "H" within 3
seconds, the unit resets automatically.
Overload
detection
Detects when the OL_DET port
becomes "L" (checks by interrupt).
Turns muting on and speaker
relay off, and immediately
turns off the power.
None
Thermal shut
down
Detects when the TEMP2 port
becomes "H".
Turns muting on and speaker
relay off, then turns off the
power after 3 seconds.
Flashing "OVERHEAT"
for 3 seconds
If the TEMP2 port becomes "L" within 3
seconds, the unit resets automatically.
After the power off, the key input is possible
once again.
Fan stop
Detects when the FAN_STOP port
becomes "L".
Turns muting on and speaker
relay off, then turns off the
power after 3 seconds.
Flashing "FAN STOP" for
3 seconds
If the FAN_DET port becomes "H" within 3
seconds, the unit resets automatically.
After the power off, the key input is possible
once again.
