JBL MPA275 - Manual (Page 14)

13
Clip
-10dB
-20dB
Signal Present
Protect
Power
Clip
-10dB
-20dB
Signal Present
Protect
Power
Clip
-10dB
-20dB
Signal Present
Protect
Power
Clip
-10dB
-20dB
Signal Present
Protect
Power
Clip
-10dB
-20dB
Signal Present
Protect
Power
ON/OFF MUTING
SHORTED LOAD
CLIPPING
OVERHEATING
THERMAL MUTING
Not Illuminated
Full Brightness
Variable or
Occasional Flashing
Flashing
Full Bright
& Flashing
Key to LED representations:
Operation
CLIP is illuminated at full bright-
ness when the output is muted
(PROTECT LED is on, too).
If CLIP is illuminated at less than
full LEVEL display, the load is
shorted or abnormal. PROTECT
may flash, too.
CLIP flashing at full LEVEL
display indicates the amp has
reached full power (clipping)
and the limiter is acting to
prevent severe overdrive.
A steady CLIP glow after the
flashing PROTECT display has
started indicates the onset of
thermal limiting.
PROTECT flashes as the amplifi-
er approaches max temperature.
Full brightness plus flashing
indicates thermal muting.
Figure 14. LED Displays
During Normal Operation
Clip
-10dB
-20dB
Signal Present
Protect
Power
Clip
-10dB
-20dB
Signal Present
Protect
Power
Clip
-10dB
-20dB
Signal Present
Protect
Power
Clip
-10dB
-20dB
Signal Present
Protect
Power
Clip
-10dB
-20dB
Signal Present
Protect
Power
NO SIGNAL
SIGNAL PRESENT (-30 dB)
LEVEL -20 dB
LEVEL -10 dB
CLIPPING
Figure 15. LED Displays During Abnormal Operating Conditions