Hello friends
I have a Kicker CX 1200.1 amplifier (Board REV:1.4 P086CX1200-A) that will not produce any audio. The power supply is producing positive rail voltage and both positive and negative regulator voltages are present as well. The control signals driving the power supply FETs are in normal working condition for this amplifier. I tested pins 4 and 6 of IC16 (UC3842) with an oscilloscope to verify that both waves are in normal operating condition. The signal in the preamp stage is clean as well and after that stage, I cannot find any part of the modulated signal going through IC9, IC10, IC11, IC14 and IC15. The Protection LED is enabled. Thank you for any help you can provide.
Voltages for Q103 and Q203 Q104 and 204
Gate 13.8V 0V
Source 75.0V 13.6V
Drain 0V 0V
I have a Kicker CX 1200.1 amplifier (Board REV:1.4 P086CX1200-A) that will not produce any audio. The power supply is producing positive rail voltage and both positive and negative regulator voltages are present as well. The control signals driving the power supply FETs are in normal working condition for this amplifier. I tested pins 4 and 6 of IC16 (UC3842) with an oscilloscope to verify that both waves are in normal operating condition. The signal in the preamp stage is clean as well and after that stage, I cannot find any part of the modulated signal going through IC9, IC10, IC11, IC14 and IC15. The Protection LED is enabled. Thank you for any help you can provide.
Voltages for Q103 and Q203 Q104 and 204
Gate 13.8V 0V
Source 75.0V 13.6V
Drain 0V 0V
I don't have anything on this amp but the following thread covers a lot on a similar amp. Maybe you'll find something useful in it until PapaZBill is back.
Kicker CXA1800.1 Flashing in and out of protection
Kicker CXA1800.1 Flashing in and out of protection
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