[Diy_efi] WB HELP U3 pin 9
Brian Hamm
brianhammEFI at hotmail.com
Sun Nov 10 01:49:03 GMT 2002
This is a multi-part message in MIME format.
------=_NextPart_000_0010_01C28661.FE2236C0
Content-Type: text/plain;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Hi my name is Brian I've been following the list for a while now but =
this is my first posting. I bought and built the WB PCB about a year =
ago but never bought the actual sensor. Now I've gotten back into it =
and I went to test the circuit as per the troubleshooting guide on the =
website and this is what I found:
Step 8 Voltage at J7 was a couple of tenths below U4 pin1 ~3.65
R37 was checked and verified correct
Step 22 The voltage at U3 pin 9 with ref to J7 was -1.23. =20
R25 checked out fine
Step 24 Voltage at J6 with ref to J7 was -1.56
R26, R27, R28 all checked out fine.
All other steps up to this point have checked out very close to =
indicated values. I'm powering up the circuit with aprox 11.8V.
All measurements are made with DMM.
I don't know how to check diodes and capacitors, like it says to, could =
someone tell me how??
I'm pretty confident that its soldered correctly and I can find no =
"blobs" shorting anything.=20
=20
Any help would be appreciated.
Thanks=20
Brian
------=_NextPart_000_0010_01C28661.FE2236C0
Content-Type: text/html;
charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2600.0" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Hi my name is Brian I've been following =
the list=20
for a while now but this is my first posting. I bought and built =
the WB=20
PCB about a year ago but never bought the actual sensor. Now I've =
gotten=20
back into it and I went to test the circuit as per the troubleshooting =
guide on=20
the website and this is what I found:</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Step 8 Voltage at J7 was a couple of =
tenths below=20
U4 pin1 ~3.65</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> =
R37 was=20
checked and verified correct</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Step 22 The voltage at U3 pin 9 with =
ref to J7 was=20
-1.23. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2> =
R25 checked=20
out fine</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Step 24 Voltage at J6 with ref to =
J7 was=20
-1.56</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> =
R26, R27,=20
R28 all checked out fine.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>All other steps up to this point have =
checked out=20
very close to indicated values. I'm powering up the circuit with =
aprox=20
11.8V.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>All measurements are made with =
DMM.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>I don't know how to check diodes and =
capacitors,=20
like it says to, could someone tell me how??</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I'm pretty confident that its soldered =
correctly=20
and I can find no "blobs" shorting anything. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2> </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Any help would be =
appreciated.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thanks </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Brian</FONT></DIV></BODY></HTML>
------=_NextPart_000_0010_01C28661.FE2236C0--
_______________________________________________
Diy_efi mailing list
Diy_efi at diy-efi.org
http://www.diy-efi.org/mailman/listinfo/diy_efi
More information about the Diy_efi
mailing list