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X4 | SERVICE MANUAL
10. Amp Modules Verification
(Fig. 30)
Each Audio Module features 10 check LEDs, as
highlighted on (Fig. 30).
In normal conditions, only the 4 Green LEDs are on.
In case of malfunction, the Red LEDs will indicate that
the module is in protection mode and replacement is
necessary.
*Another set of LED is placed next to the fuses. (marked
C
on g. 30)
These LEDs will shine a red light when the corresponding
fuse is open (blown).
Prior to replacing the fuse, check it with a multimeter set
to OHM.
A A
C C C C
B B
E
D
B
NORMAL
OPERATING
CONDITIONS
STATUS
Color REF ON OFF
Green
A
ON OK FAILURE
Red
B
OFF
CH in
protection
OK
Red
C
OFF OPEN FUSE* OK
Green
D
ON
+/-15V aux OK FAILURE
Green
E
ON
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