[Diy_efi] DIY-WB checkout ?

[rr]

Hmm, the ratio of 2.89v to 1.05v is correct (even though the
actual voltages are not). This lends me to believe that the
op amp U4 and the R11 & R36 resistors are good.

Double check that R14 is a 10K (Brn, Blk, Org) and not a 
1K (Brn, Blk, Red). That could cause the high voltage on D8-2.

D8 isn't really a diode, it is an IC voltage reference. Hence
it can not be tested via diode scale on a DVM. It may be in the
circuit reversed or just plain bad.

BobR.


Sven wrote:
> 
> Hi list.  I'm new to electronics.  Bruce Roe has been nursing me to this
> point ( motorcycle without a rectified circuit ), but it now seems time to
> move my questions to list.
> 
> On #14 ( U4 pin 14 ) I measure 1.05V so I then measure 2.89V on D8 pin 2.
> I've verified R14 is good, but how do I verify this diode ( i.e. does it
> have to be desoldered, can I do it with just the diode function of a DMM ) ?
> 
> Sven
>

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