Pioneer VSX-523-K Service Manual page 30

1
A
3.3 TEMP (AMP overheat) error detection
For detection of a TEMP error, the unit monitors both the TR_DET and PROTECT2 signals. If a TEMP error is detected,
the processes shown below will be performed. The processes shown below are rough operational specifications and are
not the actual commands from the mounted components.
After a TEMP error is detected, the count of protection activation detections will be updated.
TR_DET
Counter: Temp2
P6_4 (34 pin)
(TRTHER_DET from AMP Assy)
B
Normal Operations
*1
Is TR_DET detected?
Yes
Is the VOL value 5
or less?
C
No
Deduct 3 from the current VOL
value. Have "TEMP" flashing
on the FL display for 3 sec.
Prohibit detection of
TR_DET for 2 min.
*2
Detection of TR_DET
No
is resumed after 2 min.
D
Is TR_DET detected?
*1: The detection interval must be 1 sec or less.
*2: If PROTECT 2 is detected while TR_DET detection
is prohibited for 2 min, the PROTECT 2 function will
be activated.
3.4 How to cancel the status after detection of the DC error
Key Operation
E
(STANDBY state)
[ADVANCED SURROUND]
+ [STANDBY/ON] keys
(press and hold the keys
for 2 seconds.)
(Normal display)
[Detailed explanations]
F
30
1
2
No
Yes
POWER OFF (STBY)
Yes
FL Display
Simultaneously holding the [ADVANCD SURROUND] and [STANDBY/ON] keys on the
front panel pressed for 2 seconds will cancel Key Input Inhibition mode after a DC error
detection and turn the unit ON.
VSX-523-K
2
3
PROTECT2
Counter: Temp1
PL2_1 (71 pin)
(RADI_DET from AMP Assy)
Normal Operations
*3
PROTECT2 detected?
Yes
MUTE ON and ALL Speakers/
Phones Relay are set to OFF.
Have "OVERHEAT" flashing
on the FL display for 3 sec.
Timer START is performed
for 3 sec.
After 3 sec,
No
PROTECT 2 is rechecked.
Is PROTECT 2 detected?
Yes
POWER OFF (STBY)
*3: The detection interval must be 1 sec or less.
Time (sec.) Description of Indications
usually
Normal display
3
4
No
4