Hello to all,
I'm just doing some capacitors upgrade on the supply, and DSP board and just found that on the I/O board, based on the schematic available onthe yahoo group, for Rev. E, the board is missing the capacitor C7 (47u/25) on the 5V which, with a 10r, is feeding the realys that switch the A input from analog to digita and the C input from line to mic.
Mine is Rev. G
Could you confirm this?
Using the scope I found tha when the relay swithces in a greater amount of noise is seen on the 5V, and this is the same voltage that is feeding the CS8420 ...
I was thining about adding back a cap there, whic could "dump" the noise ... if it is generated by the coil of the relay.
Thank you,
Mauro
I'm just doing some capacitors upgrade on the supply, and DSP board and just found that on the I/O board, based on the schematic available onthe yahoo group, for Rev. E, the board is missing the capacitor C7 (47u/25) on the 5V which, with a 10r, is feeding the realys that switch the A input from analog to digita and the C input from line to mic.
Mine is Rev. G
Could you confirm this?
Using the scope I found tha when the relay swithces in a greater amount of noise is seen on the 5V, and this is the same voltage that is feeding the CS8420 ...
I was thining about adding back a cap there, whic could "dump" the noise ... if it is generated by the coil of the relay.
Thank you,
Mauro
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.