preenfm Forum

PreenFM => preenfm2 and preenfm3 => Topic started by: martindunne on September 08, 2014, 02:59:41 PM

Title: low output : solved
Post by: martindunne on September 08, 2014, 02:59:41 PM

hi there just put another preen together today and have a low noisy output? which components and areas of the pcb should i check first.
thanks

Title: Re: low output
Post by: Xavier on September 08, 2014, 04:39:23 PM

Hi Martin,

Check that your op amp is well placed, and that its ground and 5V pins actually shows 0V and 5V.

Then all the resistor values around the op amp.
http://ixox.fr/preenfm2/the-pcb-r5/pfm2_17/#main

Xavier

Title: Re: low output
Post by: martindunne on September 08, 2014, 05:13:05 PM

have got near enough 0v on pin 1 and 5v on pin 8, cheers. are there any schematics so i can test continuity.

Title: Re: low output
Post by: martindunne on September 08, 2014, 07:27:47 PM

solved!  my fault used wrong op amp only 1 channel
TLV2451CP

Title: Re: low output : solved
Post by: Xavier on September 08, 2014, 10:15:01 PM

Cool...
Thanks for the update...