Hi Everybody,
I have three 820-00840 main with almost the same problem. They all are breezed at 5V state.
There were other problems before i fixed them.
So,
First of all, I used PCD3215A10 instead of CD3215C00, which I have bought on Aliexpress.
On the first board, I have mixed PCD3215A10 and CD3215C00.
in spite of I checked everything according Mon2 article https://logi.wiki/index.php/CD3215_Bootup_Sequence (Thank you)
First board has constantly pulsation between SMS and U3200 on the SMBUS_SMC_4_G3H_SCL and SMBUS_SMC_4_G3H_SDA lines. (Both lines Non-stop).
Second and third have pulsation SMBUS_SMC_4_G3H_SDA only.
But SMBUS_SMC_4_G3H_SCL rise and then pull down. Looks like somebody (SMC) puts this line to ground. Obviously without clock signal U3200 can't receive manage signal.
Finally I broke my head and really need any help or advise.
Thank you an advance.
I have three 820-00840 main with almost the same problem. They all are breezed at 5V state.
There were other problems before i fixed them.
So,
First of all, I used PCD3215A10 instead of CD3215C00, which I have bought on Aliexpress.
On the first board, I have mixed PCD3215A10 and CD3215C00.
in spite of I checked everything according Mon2 article https://logi.wiki/index.php/CD3215_Bootup_Sequence (Thank you)
First board has constantly pulsation between SMS and U3200 on the SMBUS_SMC_4_G3H_SCL and SMBUS_SMC_4_G3H_SDA lines. (Both lines Non-stop).
Second and third have pulsation SMBUS_SMC_4_G3H_SDA only.
But SMBUS_SMC_4_G3H_SCL rise and then pull down. Looks like somebody (SMC) puts this line to ground. Obviously without clock signal U3200 can't receive manage signal.
Finally I broke my head and really need any help or advise.
Thank you an advance.
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