Good day threaders, I have a Lanzar Opti 2000D the amp was sent to me from another repair bench. The amp powers up well no device are overheating but I can't get any audio. I've replaced the audio driver board twice with a known working one.
I've only checked the main source voltages so far, like rail Voltages and op amp voltages and they are in their respective threshold 80+/- and 15+/-.
I've heard the previous tech person had already replace the 13600D ic and all the TL072's in the frontend pre-stages.
I've checked all resistors and diodes and all seem ok (in and around tolerance). I've also checked for open solder joints for top layer to bottom layer on the PCB. Before I start replacing components is there any known culprits or failures these amps are associated with?
I've only checked the main source voltages so far, like rail Voltages and op amp voltages and they are in their respective threshold 80+/- and 15+/-.
I've heard the previous tech person had already replace the 13600D ic and all the TL072's in the frontend pre-stages.
I've checked all resistors and diodes and all seem ok (in and around tolerance). I've also checked for open solder joints for top layer to bottom layer on the PCB. Before I start replacing components is there any known culprits or failures these amps are associated with?
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