[Diy_efi] WBO2 Project

[bill.shurvinton at nokia.com]

Hi Lou,

This is a problem with offset voltages on the op-amp. I am trying to =
come up with a test procedure to deal with this case and will go into WB =
diagnosis mode in a week or so as I have a friends unit to fix once I'm =
back from a business trip.

However it sounds as if yours is working fine.

Bill
-----Original Message-----
From: ext Lou Fourquet [mailto:lrf11775 at optonline.net]
Sent: 18 June 2002 22:40
To: diy_efi at diy-efi.org
Subject: [Diy_efi] WBO2 Project


Hi, I'm not sure if anyone can answer this or not, or if I am using the =
right resourses (this address). But I have completed the WBO2 project =
and went through all the check point listed; everything checks out as =
far as voltages go. The only problem I am having is when the voltages =
are supposed to change range... for ex :
=20
Keeping the DVM on U2 pin 8 close the switch. The voltage will slowly =
drop. It will take ~ 2 minutes with the voltage reaching ~ -3.4 v.=20
If not check C10, R18, R34 and U2.=20
=20
=20
For some reason it takes mine well over 2 minutes to change.. more like =
10-15 minutes.. and the same goes for the following:
Upon closing the switch the voltage at J8 will drop. After a pause the =
voltage will slowly increase. It will take approximately 1 minute & 15 =
seconds for the voltage to reach maximum.=20
=20
Any help you have or ideas which can lead me into the correct direction =
will be greatful
=20
Thanks,
=20
Lou Fourquet

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