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Clipping Indicator
The CLIP indicators are driven by the comparator U5A and U5D. The voltage divider R56, R57, and R51, R61
establishes the reference voltage for the Clipping detector at pin 7 of U5A and pin 9 of U5D. Excessive drive signal at
pin 6 or pin 8 will trigger its comparator low and light the CLIP/THERMAL indicator red.
On Indicator
The bicolor LED, CR3 and CR4 will remain green unless a THERMAL or CLIP condition is detected. The outputs of
comparators U5A and U5D will be high, and Q35 and Q36 will be off, allowing current to flow through the red LED
of CR3 and CR4 from ground to –17V.
CLIP/THERMAL
Indicator
CR3, CR4
Clipping
Detectors
U5A, U5D
Drive
Signals
DR,
DRTWT
ON
Indicators
CR3, CR4
LED Driver
Q35, Q36
Clipping
Detector
U5A, U5D
!
Qualified Service Personnel Only
