Capacitor on the DCX2496 relays control - diyAudio
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Old 27th April 2009, 10:41 AM   #1
Mambo is offline Mambo  Italy
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Default Capacitor on the DCX2496 relays control

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
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Old 27th April 2009, 12:14 PM   #2
DorinD is offline DorinD  Romania
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Why that could bother you? Relays commute at power-on, if change source or mute something, not in the program.
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Old 27th April 2009, 12:28 PM   #3
AndrewT is offline AndrewT  Scotland
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Default Re: Capacitor on the DCX2496 relays control

Quote:
Originally posted by Mambo
Using the scope I found that when the relay switches in, a greater amount of noise is seen on the 5V and this is the same voltage that is feeding the CS8420 ...
he explained why it bothered him.
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regards Andrew T.
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