Hi diyAudio,
I have Parasound HCA2200II and recently had issues that started with the cracking sound on Right Channel. I removed any speaker due to high probability of damaging the speaker.
When I am verifying the schematic which I have, I found that the R225 is measuring 20K ohms instead of 47K.
Bias resistors are railed voltage at +/-77V on the Right Channel while Left is around 25mV.
I am inclining that there is/are bad components on the driver board.
I also noticed sparkling on the R217 on the PCB trace when powered-up but this is gone now. I've checked the Q201-202 and Q203, they looked okay when compared with Left Channel.
I am attaching the schematic I found in the web.
Thank you in advance for the help.
I have Parasound HCA2200II and recently had issues that started with the cracking sound on Right Channel. I removed any speaker due to high probability of damaging the speaker.
When I am verifying the schematic which I have, I found that the R225 is measuring 20K ohms instead of 47K.
Bias resistors are railed voltage at +/-77V on the Right Channel while Left is around 25mV.
I am inclining that there is/are bad components on the driver board.
I also noticed sparkling on the R217 on the PCB trace when powered-up but this is gone now. I've checked the Q201-202 and Q203, they looked okay when compared with Left Channel.
I am attaching the schematic I found in the web.
Thank you in advance for the help.
