VSX-45TX
117
5
6
7
8
5
6
7
8
C
D
F
A
B
E
PROTECT CHECK
DC 003
PROTECT CHECK
OVERLOAD 002
PROTECT CHECK
FANTOP 000
PROTECT CHECK
TEMP 000
4
Diagnostic mode
This mode is only for servicing and checking the circuit design,
and not open to users.
When the STEREO/DIRECT key and TONE + key are both held
pressed for 2 seconds in Standby mode, the power is turned on,
and the number of times of each defect or Speaker relay off by
abnormality detection is sequentially displayed on the FL display.
Displayed items:
• DC detection
• Overload detection
• Fan detection
• Temperature detection
Hold the STEREO/DIRECT key and TONE + key pressed for 2
seconds in Standby mode.
When the MULTI CH IN key and TONE
−
key are both held
pressed for 2 seconds in standby mode, all clear the counter for
detection.
Protection Process List
Item
Purpose
Detection Method
Process
Warning Indication
Remarks
DC
detection
To detect amplifier damage
(defect status) A process to
protect speakers
(for protection of connected
external devices)
Detects when the DC_DET port
becomes "L".
Turns muting on and
speaker relay off, then
turns off the power after 3
seconds.
Flashing "AMP ERR" for
3 seconds.
Flash the standby LED
after the power off.
Once detected and turned
the power off, input a key
never again.
AMP
overload
To detect overloading
(abnormal status) With low-
load driving or a short circuit
of the speaker terminals (for
protection of the amplifier)
Detects when the AMP_OL port
becomes "L" (checks by interrupt).
Turns muting on and
speaker relay off, and
immediately turns off the
power.
None
Fan
control
Protection function against a
temperature rise at the heat
sink
HY, F : Detect temperature
more than 100
°
C.
KU, J : Detect temperature
more than 125
°
C.
Turns muting on and
speaker relay off.
Rotate the fan
Continue flasing with
"OVERHEAT"
HY, F : Detect temperature
of 90 to 100
°
C.
KU, J : Detect temperature
of 110 to 125
°
C.
Rotate the fan
Mute, relay and warning
indications is leading hold.
HY, F : Detect temperature
of 80 to 90
°
C.
KU, J : Detect temperature
of 80 to 110
°
C.
Rotate the fan
Mute off & relay on
(normal mode)
Detect temperature of 70 to 80
°
C.
Fan is leading hold
A condition except the above.
Stop the fan
Fan stop
To know that the rotating fan
is forcibly stopped
Detects when the FAN_DET 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.
