[DSP-10] 5V at D1-A1

Tue, 14 Oct 2003 19:34:34 -0700

Hello Matthew,

You may be seeing a correct indication.  First I would make sure that U107
is being loaded correctly.  The value loaded into U7 determines the voltage
out of D2-A1 and D1-A1.  Check the "Serial Bus Diagnostics" web page at

   http://www.proaxis.com/~boblark/dig_ser1.htm

Let us know what you see.

73,

- Steve, N7HPR
 ([email protected])

> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]]On Behalf Of Matthew J. Wolf
> Sent: Sunday, October 12, 2003 7:52 PM
> To: [email protected]
> Subject: [DSP-10] 5V at D1-A1
>
>
>
> When my DSP-10 is set to receive I measure 5V at D1-A1 and 0.73V at D2-A1.
> I replaced R141, R142, R143, R144 thinking that they where bad. That did
> not lower the voltage at D1-A1 so I replaced U107. I am still seeing 5V at
> D109 and D110. Is there any thing I can do to try to reduce the voltage at
> D1-A1?
>
> -Thanks
>  Matthew Wolf (KC9DQP)
>
>
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